JP5659627B2 - Envelope with window - Google Patents

Description

The present invention relates to an envelope with a window provided with a transparent window in which information can be visually observed in a part of the envelope, and particularly to an envelope with a window having a hologram in the window.
In the present specification, “parts” indicating blending are based on mass unless otherwise specified. The “hologram” includes a hologram and a hologram having a light diffractive function such as a diffraction grating.

(Main application) As the main application of the envelope with a window of the present invention,
Long, square, and western envelopes that are the size of regular or non-standard-size mail,
Envelopes used for first-class mail items, second-class mail items, third-class mail items, fourth-class mail items, city special mail items, ordinary mail items such as different types of mail, and parcel mail items,
Registered mail, express delivery, underwriting time certification, delivery certification, content certification, cash on delivery special delivery, New Year's special mail, next morning mail, new super express mail, delivery date designated mail, patrol mail, new limited express mail, delivery record mail, cold storage mail, Envelopes used for personal limited mail,
“Postal Regulations (Final Revision of Heisei 14), Chapter 2 Section 1 Section 7“ Envelopes and bags with windows are limited to those that are closed with a thin transparent object or similar, and closed. Envelopes corresponding to "This can be used for packaging mail"
In Article 11 of Article 2 of Chapter 2 of the same rule, “For standard mail, it shall satisfy the standards of thickness and other shapes listed in Article 21, Paragraph 2, Item 1 of the Postal Code. For those with windows on the surface, (a) the lower part of the part where the address of the mail is written or the part where the address can be seen through in accordance with the provisions of the proviso to Article 9 paragraph (1) For long items, the left side) is provided with a window (b) is a long side, and a window with a size not exceeding 6 cm in length and 3 cm in width is located in Article 9. Provided on the right side of the part where the name can be seen through in accordance with the provisions of the proviso to paragraph 1 (c) Use of envelopes or bags made of synthetic resin such as vinyl resin or polyethylene resin for packaging The packaging is omitted in accordance with the provisions of the proviso to Article 7 paragraph (1). Envelopes and the like corresponding to the ones that are made of synthetic resin as the main material and have a shape to be notified separately, or fall under any one of them.

In addition, the envelope of the middle paste, left side paste, right side reverse paste, inner barracuda, outer barracuda, diamond
As the envelope with window, the material of the window and the size of the address window comply with the postal regulations, that is, “Highly transparent like cellophane (with opacity of 20% or less by JIS P 8138 test) And addressed windows having a short side of 45 mm or more and a long side of 80 mm or more ”, many of which are envelopes that are compatible with sorting by a mail sorting machine,
Or you can reduce the cost of delivery slips from the parcels delivered by the shipping company on the condition of “reduction of damage when lost”, “limited to small size”, “no need for post-inquiry” Envelopes that are used without restrictions such as postal rules in a home delivery service called "email service" that reduces the cost of delivery while maintaining a code tracking system,
In addition, it is used as a means for sending documents such as various notices, letters of invitation or invoices, and also as a means for sending confidential documents, etc., and one of the forms has a window on the envelope body. A window opening envelope that covers the window with a transparent film so that the inside of the envelope body can be seen. The recipient's address is printed on the document and printed in the envelope body. Envelopes that can be confirmed from the outside through the window, have the advantage of eliminating the trouble of having to write and print the recipient's address name on the surface of the envelope body, and that various companies use when sending documents to customers ,
As a direct mail that is extracted by attributes such as purchase frequency from a database of customer information such as retail stores that have been used in the past and credit card companies that have joined, and delivered by mail or mail service, Banks, securities companies, credit card companies, department stores, mass merchandisers, etc., send to customers in large quantities, etc. Many of them are inserted and sealed into their envelopes by automatic sealing and sealing machines Envelope etc.

In addition, various products, product samples, bonuses, discount coupons, as well as items enclosing various types of cash vouchers such as gift certificates, bills, checks, etc. Catalogs are sent as up-to-date, and consumers can look at them and purchase products and services. Also, as a way to enjoy these mail order sales, look at the catalogs sent regularly. It has a function as a certain medium, such as a hobby, and it is not a catalog that can be discarded as soon as it is read by a mail order company, but it is edited as a kind of magazine, an envelope that gives information value,
In addition, documents, booklets, catalogs, posters, calendars, pamphlets, T-shirts, etc. are sent by mail, a paperboard envelope for mail services, and a board made of recycled paper that protects the contents of books and documents with a shock-resistant structure. Ball parcel case, corrugated cardboard case that can be folded in free size using cardboard eyes, corrugated cardboard box case that can be assembled with one touch and does not need to be attached to the bottom, and envelope for cardboard booklet parcels using recycled paper , Air cushion envelopes, recycled cardboard gusseted envelopes, single-sided cardboard envelopes, OPP bags with outstanding transparency,
Examples used in restaurants, mail-order sales, money lending, real estate companies, etc. that are used for the purpose of directly sending leaflets and flyers to the mailbox of each individual house for the purpose of advertising and publicity, and those that are not commercial purposes All windowed envelopes distributed in the market, such as envelopes used by local governments (regional event guides and announcements) and waterworks (mainly water cuts and waste water due to construction, traffic regulation notices) Used for.
Among these, finish the envelope in advance, finish it with an envelope bag making machine, paste it while supplying the film for windows, and print and process continuous forms, and within that process Supply and stick window films and finish them as envelopes with windows, as well as applications for various deposit accounts such as banks, automatic payment of utility bills, card issuance, membership to various membership organizations, etc. Some applicants make their own bags after filling in the required information.
Among the above fields, it is particularly suitable for fields that are excellent in design and need to increase the opening rate.

(Prior art)
Recently, paper envelopes with a transparent window made of paper with a transparent film attached to the transparent window have been widely used. When creating invoices with a line printer, etc., if the address and name of the address are printed on a part of the invoice, etc. so that they can be seen from the window of the envelope with a window, the address is sent to the envelope. This is because it saves the trouble of printing the address, name, etc., and can greatly improve the administrative efficiency. References relating to such envelopes with windows include JP-A-57-28756, JP-A-60-161045, JP-A-61-40338, and the like. Japanese Patent Application Laid-Open No. 57-28756 discloses a continuous envelope with a window and an apparatus for manufacturing the same, by bursting an envelope-forming continuous paper having a transparent window and a continuous paper for insertion, respectively, When the envelope-forming piece is folded in half, the inner insert piece is inserted into the envelope-forming piece, and then the periphery of the envelope-forming piece is sealed and adhered. It is stored in a state, continuous paper for envelope surface layer, continuous paper for correspondence, etc., continuous paper for envelope back layer are stacked as continuous paper, the edges are bonded for each envelope unit, and then the continuous paper is burst. In the previous continuous envelope, the edge of the message is pasted on the front and back edges of the envelope body, and it is improved that the message could not be taken out just by opening a part of the envelope body .
The envelope with a window disclosed in Japanese Utility Model Publication No. 60-161045 is provided with a notch protruding from the upper edge or the lower edge of the envelope on the back side of the envelope with a window toward the window, and is exposed from the notch. A part of the sealing tongue is attached to a part of the part, and the slip is prevented from sticking in the envelope.
As the transparent film to be attached to the see-through window, a plastic film such as a polyethylene film, a polypropylene film or a polyester film having excellent strength and transparency is used.

Using such envelopes with windows, as described above, sending confidential documents that you do not want to be known to other than the recipient, or multiple documents such as a large amount of information that cannot be written on a postcard When sending a mail, the documents are enclosed in an envelope and mailed, or a direct mail in which envelope information such as bargain information, new store opening information, mail order catalogs, etc. is enclosed is sent directly to a specific customer. However, many postal items and deliverables are posted to each customer's post every day, and from the many postal items and deliverables, the envelope sender and the Each person selects the necessary postal items and deliverables as far as they can be confirmed from the window, and only the selected postal items and deliverables are opened, and other postal items and deliverables are not opened but discarded. There were many.
In order to deal with this, for example, in order to improve the opening rate of direct mail, in addition to “advertisement” which is the original purpose of mailing and delivery, “inclusions” such as product samples, bonuses, discount coupons, etc. Is encapsulated in an envelope, and the “enclosed” form (document) includes, for example, mail (such as the postal code and postal rules) in addition to printing the address for a predetermined window. In other words, there is another window within the range permitted by the Postal Code, and from this window, you can see a part of the contents printed on the form inside the envelope and the contents of the enclosed prize. Thus, the device which raises the opening rate of an envelope is made | formed. (For example, see JP-A-8-282678.)
Furthermore, instead of the address part on the envelope member, a new window is provided, an optical diffraction pattern is provided at that position, and the appearance of the envelope is differentiated with respect to other mail items. There are also attempts to improve the opening rate of envelopes. (For example, see JP-A-8-175546.)
However, it is not possible to enclose expensive prizes etc. every time in large quantities and many times, and it is not an address window that can secure a large size at a predetermined position as an envelope window. Just by providing another window at another position and attaching a light diffraction pattern at that position, the effect of differentiation from other envelopes is thin, and the appearance of the envelope is only visible Then, since the “light diffraction pattern design” can be appreciated, there is no need to open the box, and the effect of “improving the opening rate directly” is small.

In addition, when using a method in which a light diffraction pattern is provided on the “enclosure” itself and it is arranged so that it can be viewed from a “window provided at another location” other than the address window, a form for printing individual information is used. Therefore, it is required to perform special processing such as light diffraction on the corresponding positions individually, which is complicated and costly.
In addition, for each customer, and for each purpose of sending, as described above, a separate opening (another window) is provided at a location other than the address window for the envelope, and light diffraction is performed according to the position. The process of affixing a sheet provided with a pattern is complicated, low efficiency, and lacks mass productivity in today's demand for multi-product and small-lot production including the inspection process.
In addition, address information is originally defined as “personal information” to be protected by the Act on the Protection of Personal Information (Act No. 57 of May 30, 2003). In order to prevent illegal acts such as copying using a copy machine or the like and disclosing it to a third party or handing it over as money, it did not have a function to prevent the copying or copying.
In particular, collect information such as newsletters for special members such as luxury brand manufacturers and luxury car sales companies, mail for notifications, etc., and information on the postal items and deliverables, etc. Therefore, a mail bundle or a bundle of deliverables that can create a socially added “personal information list” is copied in the delivery or delivery process. However, as there was nothing, there was no copy prevention means or copy prevention means for preventing illegal acts such as delivery or delivery.

JP-A-8-282678 JP-A-8-175546

  In order to solve the above-mentioned problems, the present invention is sure to check the "window" portion that can secure a large area in an envelope with a window, that is, whether the recipient is the person or a family member. The address, etc. under the window can be sufficiently visually confirmed on the address window, and / or the address, etc. can be automatically recognized without trouble by optical machine reading such as a mail sorting machine. By providing a transparent relief hologram sheet, it is possible to secure a sufficient size at a predetermined position on the envelope, sufficiently attract the attention of the customer, improve the opening rate, and illegal copying It is providing the envelope with a window which can prevent such acts directly.

To solve the above problem,
The first aspect of the envelope with window of the present invention is:
In an envelope with a window provided with a transparent window, the transparent window is an envelope with a window composed of a transparent relief hologram sheet in which a relief hologram is formed on at least one surface thereof,
In addition to the ornamental relief hologram that can be visually recognized with normal illumination light, the relief hologram has an angle of incidence of 10 degrees to 45 degrees, and the incident angle is 10 degrees to 45 degrees. A relief hologram for copy prevention for reproducing a hologram reproduction image having reproduction areas alternately arranged in a grid pattern in the direction is formed in a multiplexed manner.
According to the envelope with a window of the first aspect,
In an envelope with a window provided with a transparent window, the transparent window is an envelope with a window composed of a transparent relief hologram sheet in which a relief hologram is formed on at least one surface thereof,
In addition to the ornamental relief hologram that can be visually recognized with normal illumination light, the relief hologram has an angle of incidence of 10 degrees to 45 degrees, and the incident angle is 10 degrees to 45 degrees. An envelope with a window, characterized in that a relief hologram for copy prevention for reproducing a hologram reproduction image having reproduction areas alternately arranged in a grid pattern in the direction, can be provided, and an addressee ( Envelopes have a hologram in the “window” of the envelope that must be confirmed by the person who receives the envelope, thereby improving the opening rate and preventing illegal copying of address information through this “window”. be able to.
The second aspect of the envelope with a window of the present invention is:
The size of one area of the grid-like reproduction area is 0.5 mm to 5 mm.
According to the envelope with window of the second aspect,
2. The envelope with a window according to claim 1, wherein a size of one area of the grid-like reproduction area is 0.5 mm to 5 mm. It is possible to more effectively prevent illegal copying of address information and the like.
The third aspect of the envelope with window of the present invention is:
The incident angle of the oblique incident illumination light is obtained by removing an incident angle region of an oblique incident illumination light of an illumination light source of a mail sorting machine used for the envelope with the window. .
According to the envelope with a window of the third aspect,
The incident angle of the oblique incident illumination light is obtained by removing an incident angle region of oblique incident illumination light of an illumination light source of a mail sorting machine used for the envelope with window. Alternatively, an envelope with a window as described in 2 can be provided, and in addition to the above effects, reading of address information and the like in a mail sorting machine can be prevented.

The paper or paperboard used for the envelope is generally roughly classified into printing paper / information paper, packaging paper, sanitary paper, hybrid paper, cardboard base paper, and paperboard board depending on the intended use.
As a further subcategory,
Quality paper, medium quality paper, color quality paper, art paper, coated paper, matte coated paper, mirror coated paper, art post, Kent paper, reprinted paper, carbonless paper, imitation paper, glassine paper, recycled paper, white paperboard, color Paperboard, processed paper, advanced printing paper, intermediate printing paper, lower printing paper, fine coated paper, lightweight coated paper, inkjet paper, POD paper, sublimation heat transfer paper, etc. printer paper, foam paper, carbonless paper, thermal paper, OCR paper, OMR paper, magnetic recording paper, etc. (information paper), unbleached kraft paper, semi-bleached kraft paper, coated bleached kraft paper, renewable moisture-proof paper, etc. (packaging paper) Paper, paper mixed with other materials, textured paper, pearl-processed paper, liner, core base paper (corrugated base paper), etc., with no pigments on the surface, wood (raw material) is chemically treated Chemical And uncoated paper, high-quality paper, medium-quality paper based on uncoated paper, high-quality paper, and medium-sized paper mixed with wood pulp (raw material). Glossy, coated paper, and other wood pulp made from wood pulp. Machine paper is used for mass production of paper, such as Kouzo, Mizumata, Ganpi, Hemp, Dan (Mayumi), etc. There is Japanese paper as raw material.
In addition to the above, resin impregnated paper, synthetic paper, resin film, and the like are also used as the material used for the envelope. As the resin film, polyethylene (PE), polypropylene (PP), expanded polypropylene (OPP), polystyrene (PS), methacrylic resin, acrylic resin, ABS resin (ABS), polyvinyl chloride, or the like is used.

Using these papers, paperboards, and resin films, the “envelopes with windows” used for various applications described above can be rolled into a sheet-fed bag making machine, a window pasting device, or a sizing device. It can be produced by using a bag making machine, various form printing machines and the like.
These bag making machines use the name of the envelope to be produced, flat plate bag making machine gusset bag making machine, western envelope bag making machine for vertical envelopes, horizontal envelope bag making machine, or outer-combustion bag making machine sheet It is also called a leaf-type square bottom bag making machine.
An envelope with a window is formed in a predetermined shape (using a cutting machine or a punching machine having a punching blade capable of punching a flat sheet such as chrysanthemum or fourty-six into a predetermined shape). An expanded form of an envelope. An opening as a window can be provided at a predetermined position.) A piece of each piece is glued to a predetermined portion while a window film is being pasted by a bag making machine. Can be produced.
At this time, the bag-making glue and the envelope-sealing glue are different from each other, and the bag-making glue is bonded to the water-based acrylic emulsion adhesive that is fixed by drying or by partially pressing. Corresponding to envelope materials used for envelopes with windows, such as pressure-sensitive adhesives and pressure-sensitive adhesives, heat-sensitive adhesives and pressure-sensitive adhesives whose solidification reaction is accelerated by heating, and high-frequency drying adhesives Things can be used.
Adhesive for envelope sealing is provided with rewet adhesive such as arabic glue on the envelope sealing part, and attaches water etc. at the time of sealing and seals, double-sided tape type, and further, envelope sealing part An ad hair type is used in which glue is provided on both the “lid” and “folded” portions.

In addition, the above-mentioned adhesives and pressure-sensitive adhesives used for window films can be applied, but a relief hologram is formed on one surface of the window film used for transparent windows of the present invention. Since the transparent relief hologram sheet thus prepared is used, an adhesive capable of bonding the transparent relief hologram sheet and the envelope paper is selected.
In particular, when the transparent relief hologram sheet is peeled off from the envelope paper after opening the envelope with the window and stored for viewing, it means “an adhesive / adhesive trace” (meaning an adhesive / adhesive residue). It is preferable to use one having “removability” that does not remain.
An envelope with a window has a basic structure in which a window portion is provided on one surface of an envelope body, and a transparent film side portion is attached around the window portion to cover the window portion.
The envelope main body is composed of, for example, an envelope upper paper having a window portion and an envelope lower paper to be superimposed on the envelope upper paper, and four sides are sealed through adhesive means provided on four opposite sides.
This envelope with a window is prepared by providing a marginal punch section for paper feeding on a roll-shaped envelope upper paper and a roll-shaped envelope lower paper, and preparing them in a separated state. Is continuous through the cut perforations, and multiple envelope sheets are also continuous through the cut perforations, so that each sheet of envelope is associated with a transparent film piece for windows. The pressure sensitive adhesive is provided in a pattern slightly inside the window opening of the envelope cover paper, and the transparent film is stacked on top of it, and the four sides are pressure-bonded. Can be obtained continuously by making it possible to separate envelopes with a plurality of units by sealing the four sides of the envelope paper and the envelope lower paper one by one, and sealing the four sides. It can be done.
The envelope upper paper and the envelope lower paper constituting the envelope main body are made of foam quality paper or the like.

The overlapping surface of the envelope lower paper is provided with an address portion at a position corresponding to the window portion of the envelope upper paper, and information in a position not corresponding to the window portion is an internal region surrounded by the sealed portion. A recording section is provided, and the address section and the information recording section are preliminarily printed and formed with necessary information, ruled lines, designs, etc., using form printing ink or the like. Individual information for each item is printed by a non-impact printer, etc., and the background pattern etc. is printed on the overlapping surface of the envelope paper so that the information displayed on the information recording unit side is not visible from the outside. Then, it is set as an integral envelope with a window.
In addition, for example, when mailing as a postal matter, a postage prepayment mark is printed on the outer surface of the envelope upper paper (the outer surface of the envelope body), and the area other than the mark on the envelope upper paper and the envelope lower paper Matters to be printed are also provided on the outer surface (the outer surface as the envelope body) as necessary.
In this way, after predetermined printing is performed, various individual variable information is printed, and the envelope upper paper and the envelope lower paper are overlapped and sealed in four directions, so that a plurality of units are continuous. An envelope with a window is obtained, and then an envelope with a window as a unit is obtained by separating from the cut perforation.
Also in this case, since a transparent relief hologram sheet having a relief hologram formed on one surface thereof is used for the window portion, an adhesive capable of adhering the transparent relief hologram sheet and envelope paper in the same manner as described above. Is used.
However, since the above processing is performed at high speed and by continuous processing, a large number of guide rolls for conveyance (form printing processing machine) are attached with a transparent relief hologram sheet having a relief hologram formed on one surface. The upper surface and the lower surface of the metal guide roll are in contact with each other.
Therefore, it is preferable to use a transparent relief hologram sheet having a sufficient surface hardness so that the relief hologram is not damaged or deformed by this contact.
For this reason, it is more desirable to use an ionizing radiation curing type material as the material for forming the transparent relief hologram. If the transparent relief hologram sheet has a multilayer structure, at least the layer on which the relief hologram is formed (which means a hologram-forming layer having a relief hologram on its surface) uses an ionizing radiation curing type. To do.

In addition, as an envelope with a window containing a reply envelope, for example,
In the envelope with a window having a window for address created as described above, the three peripheral edges to be sealed on the opposite surfaces of the return envelope upper paper and the return envelope lower paper are difficult to peel off. Other parts (areas other than the three edges) are peelably bonded, and a one-sided opening type reply on which address information or the like (hereinafter referred to as address or the like, or simply address or address information) is printed. The envelope can be created by enclosing the envelope so that the address information corresponds to the window portion of the envelope with a window (meaning that the address information is removed from the window portion).
For example, after adhering to the entire surface of one of the opposing surfaces, the three peripheral edges to be sealed of the opposite envelope upper paper and the lower envelope of the reply envelope should be difficult to peel and the other parts can be peeled off. A configuration in which an adhesive layer made of a peelable pressure-sensitive adhesive is provided, and an adhesive force enhancing layer that enhances the adhesive force of the pressure-sensitive adhesive is provided on the other three peripheral edges of the opposing surface can be mentioned. As the adhesion enhancing layer, a fine silica powder having a small average particle size is obtained from polyvinyl alcohol, carboxymethylcellulose, cellulose ether, starch, and derivatives thereof, gelatin, albumin, gum arabic alkinates, polyacrylamide, or polyvinylpyrrolidone, Alternatively, it can be obtained by forming a resin composition comprising these mixtures and the like and a mixture of equal amounts or more in a predetermined pattern with a thickness of several μm.
In such a reply envelope, the opposing surfaces of the reply envelope upper paper and the reply envelope lower paper are detachably bonded so that a gap is generated due to non-impact printer printing or the like on the reply envelope surface. Accordingly, the surface of the return envelope can be brought into an appropriate charge state, and the contact state with the drum can also be made appropriate, thereby enabling reliable printing. Also, since the reply envelope looks like a single sheet, it can be easily inserted into an envelope with a window, and when replying, the peelable adhesive surface between the reply envelope top sheet and the reply envelope bottom sheet Can be peeled off to enclose various documents such as application forms.

Further, for example, an envelope with a window is a normal envelope formed by folding a single sheet and adhering an adhesive margin, and the opening is closed with a transparent film to form a window. A reply envelope and an application form can be enclosed in the envelope with window. The application form, for example, is divided into an application form and an admission guide, with the cut perforation as the boundary (boundary line). The admission application form has an admission application form in addition to the title “Admission application form” on the surface. The application date, entry address, name, and seal fields are printed, while the enrollment guide has the title “Guide to join XX” and the enrollment guide on the back. The usage instructions for the reply envelope are printed on each.
The reply envelope is composed of a reply envelope top sheet having an address information printing section on the surface and a reply envelope lower sheet whose surface is a reply destination information print section, and the address information print section has a reply envelope on the windowed envelope. It is provided at a position corresponding to the window when sealed. On the surface opposite to the envelope lower paper which is the back side of the envelope upper paper, an adhesive layer formed by entirely applying a pressure-sensitive adhesive that can be peeled off after bonding is provided, and on the envelope which is the back side of the envelope lower paper On the surface facing the paper, an adhesion enhancing layer is provided on the three peripheral edges to be sealed.
The reply envelope is initially in a continuous state in which unit envelopes are connected via a fold (and cut) perforation, and the right perforation of the return envelope upper paper and the left and right edges of the envelope lower paper are respectively cut perforations. And a sheet conveying marginal portion provided with a transfer hole at the cutting perforation as a boundary (boundary line).
As a pressure-sensitive adhesive that can be peeled after bonding, a natural rubber latex obtained by graft-copolymerizing styrene and methyl methacrylate with a tackifier such as a terpene resin is used. Can do.
By applying a predetermined pressure, which is the adhesive condition of the pressure-sensitive adhesive, the pressure-sensitive adhesive penetrates the adhesive strength-enhancing layer at the three edges to be sealed. By strengthening the adhesive force, it is strongly bonded difficult to peel, and the other parts are weakly bonded so as to be peelable. Thus, the reply envelope is in a sheet state in which the opposing surfaces of the reply envelope upper paper and the reply envelope lower paper are in close contact with each other.

Therefore, there is no gap between the envelope upper paper and the envelope lower paper even if it is applied to the non-impact printer while transferring the reply envelope in the continuous state by using the transfer marginal holes by the tractor device. Since the charge is applied in an appropriate state and the drum is contacted in an appropriate state, the address information for the address information printing portion of the return envelope upper sheet is surely made without blurring.
Similarly, the reply destination information to be printed on the exposed surface of the reply envelope lower sheet is also surely made without any blur. This reply destination information is invariant information common to all reply envelopes, and may be printed in advance.
The reply envelopes in a continuous state after printing are separated at the perforation for each envelope, and each address information is positioned corresponding to the window portion of the envelope with a window, together with the application form, the envelope with a window It is enclosed and sealed using a sealing and sealing device. This sealing / sealing operation is smoothly and reliably performed because the return envelope is in the form of a single sheet.
However, since a transparent relief hologram sheet is already attached to the envelope with a window as a film for a window, a reply envelope or the like is caught by the transparent relief hologram sheet when it is inserted. To prevent the transparent relief hologram sheet from being peeled off from the envelope surface (because it originally has only a peelable adhesive strength), a “guide” (a thin and flat metal spatula) is used to prevent collision when inserted. It is also preferable to use the meaning of performing treatment such as placing on a transparent relief hologram sheet.

Through the above steps, the envelope with a window can be mailed in the same manner as a general envelope, and is mailed or delivered to the addressee.
The addressee (recipient) who received this envelope with a window confirms the “address” provided in the window, whether it is addressed to himself / herself, addressed to his / her family, or addressed to another person at all. In this case, the “hologram” in the window is surely visually recognized, and the “hologram design” is “appreciated” with a probability of almost 100%.
Of course, if the address was for a family member or another person, the envelope with the window will eventually be handed over to the “applicable person” and again, the “applicable person” will be almost 100%. With probability, you will “appreciate”.
Needless to say, the high “appreciating” rate contributes to the improvement of the opening rate.
After that, open the envelope for reply and the application form, read the guidance text and explanatory text of this admission guide, and if you wish to join, fill in the required items in the entry application form, Mark your own seal in the stamping field, break the perforation for cutting, and separate the membership application form and membership guide. Then, the peelable adhesive portion between the envelope upper paper and the envelope lower paper of the reply envelope is separated, and the membership application form is inserted, and then glued and sealed. As a result, the return envelope is in a post-loadable state similar to a general envelope, and is mailed to the reply destination.
The envelope with window itself or the transparent relief hologram sheet can be separated from the envelope body of the envelope with window and stored for personal viewing.

Furthermore, since the transparent relief hologram sheet has a function of diffracting light passing therethrough, the visibility of “information such as an address” immediately below the transparent relief hologram sheet is improved with respect to the act of visually confirming the information from obliquely above. Has the effect of reducing.
The address, etc. (including name) of the envelope with a window should be protected as “personal information”, and it is necessary to avoid unnecessary disclosure. However, a transparent relief hologram sheet should be placed on the address, etc. By providing, it is possible to suppress unnecessary visual recognition from an oblique direction (such as peeping from the side or behind the person or trying to see the envelope from a position away).
For example, ethylene-vinyl acetate resin, acrylic resin, vinyl chloride resin, vinylidene chloride resin, and synthetic rubber resin are used as a structure for releasably adhering the envelope envelope and the envelope envelope of the return envelope. A pressure sensitive adhesive based may be used. Further, the return envelope may be sealed by gluing, or a double-sided adhesive tape may be provided in advance, and one of the envelopes may be covered and protected with release paper. Further, the reply envelope may be in a unit state from the beginning instead of a continuous state. In this case, a marginal portion having a transfer marginal hole is not necessary.
In addition, the envelope to be enclosed in this windowed envelope is not limited to the combination of a return envelope and an application form. A return envelope is an essential requirement, but other related documents in addition to the application form must be enclosed. Or, in place of the application form, a confirmation letter for the balance notice etc. can be enclosed. Furthermore, the address information of the reply envelope and the reply destination information may be printed on the same surface.

A transparent relief hologram sheet having a relief hologram formed on one surface is a method in which a transparent film itself is a “hologram forming layer” having a hologram relief, or at least one surface of a transparent substrate is transparent. It is obtained by a method of coating a resin to form a laminate provided with a “hologram forming layer” having a hologram relief.
In the former method, the hologram forming layer is made of a transparent resin material or a transparent resin film (hereinafter also collectively referred to as “resin”).
As the transparent resin, various thermoplastic resins such as acrylate resin, thermosetting resin such as unsaturated polyester resin, or ionizing radiation curable resin such as epoxy acrylate can be used.
In order to form a hologram forming layer using the above resin, it can be directly formed by developing the photosensitive resin material by performing interference exposure of the hologram, but a relief hologram prepared in advance or a duplicate thereof. Alternatively, the plating is performed by using a plating mold or the like as a replication mold and pressing the mold surface (having a hologram relief on the surface) against the resin.
Alternatively, the hologram relief is formed at the same time as the resin is molded by various molding methods such as extrusion molding, blow molding, vacuum molding, calendaring, etc. It can also be.
The thickness of the hologram forming layer is 5 μm to 200 μm. Preferably, it is 20 μm to 50 μm. Of course, the thinner the thickness is, the more advantageous in terms of cost and transparency, but if it is less than 5 μm, the strength as a sheet is insufficient, and the envelope processing suitability, mailing and delivery suitability are lacking, When the thickness exceeds 200 μm, a large step is formed between the window portion and other portions, and the envelope processing is not appropriate, such as being caught during the envelope processing, and lacking in proper mailing and delivery.

Since the above method can be formed directly from a resin without using a transparent substrate for supporting the resin, a step of coating the resin on the transparent substrate in advance is not required, and the cost and management are reduced. Excellent in terms.
In the latter method, the transparent substrate can be made thin, and the mechanical strength, the processing and processing when manufacturing the transparent relief hologram sheet, and the envelope processing with a window High resistance to contact with envelope paper at the time and contact with the guide rolls of various processing machines, etc. Solvent resistance, heat resistance and wear resistance suitable for such processing and processing It is preferable to use a transparent substrate that has appropriate adhesiveness to the material used for the envelope and removability.
Since it depends on the processing method, it is not limited, but a film-like or sheet-like plastic is preferable.
For example, various plastic films such as polyethylene terephthalate (PET), polycarbonate, polyvinyl alcohol, polysulfone, polyethylene, polypropylene, polystyrene, polyarylate, triacetyl cellulose (TAC), diacetyl cellulose, and polyethylene / vinyl alcohol can be exemplified. .
Although the thickness of a transparent base material is 5-100 micrometers normally, it is desirable to set it as 25-100 micrometers from the handling appropriateness.
A hologram relief can be formed on the transparent resin coated on the transparent substrate using the same method as described above.

A hologram is a recording of interference fringes due to interference of light between object light and reference light in an uneven relief shape. For example, laser reproduction holograms such as Fresnel holograms, white light reproduction holograms such as image holograms and rainbow holograms, and There are color holograms utilizing these principles, computer generated holograms (CGH), holographic diffraction gratings, and the like. Further, like a machine readable hologram, the reproduction light may be converted into data by a light receiving unit and transmitted as predetermined information, or authenticity determination may be performed.
However, an image hologram that is centered on the hologram forming layer and reproduces an image before and after that, or a hologram that has high reproduction efficiency, has a light refraction / scattering or light reflecting rate in the hologram forming layer. In order to satisfy the optical characteristics stipulated in the above-mentioned postal regulations, it is not suitable for optically recognizing address information etc. under the transparent relief hologram sheet. Is a laser reproduction hologram, white light reproduction hologram, color hologram, CGH (computer graphics hologram) in which the reproduction position (imaging position) of the hologram reproduction image is set to a distance of 2.0 mm to 20 mm from the hologram forming surface. And machine readable holograms.
In addition, a hologram composed of a diffraction grating has a diffraction efficiency of 1% to 10%. If it is less than 1%, it is difficult to recognize the hologram itself. If it exceeds 10%, the intensity of the 0th-order diffracted light (which contributes to optical reading of the address, etc.) is reduced by the diffraction of the light, and the postal rules described above. Will not be satisfied.

Of course, in the case of direct delivery, such as mail, regardless of mail, since there is no such restriction, any hologram can be used, but since the address etc. need to be visually confirmed, the diffraction efficiency is 20 % Or less.
When the diffraction efficiency exceeds 20%, the 0th-order diffracted light passes through the transparent relief hologram sheet, is reflected by the information recording surface such as the address arranged below, and passes again through the transparent relief hologram sheet. When returning, the intensity of the light becomes ± 60% by the first order diffraction (for example, when the two diffracted lights are evenly present) at the first pass, and the light is reflected on the information recording surface. It is further reduced by absorption / scattering of, for example, about 50%, and after the second pass, it becomes 30% or less, making it difficult to visually recognize the information itself.
The information recorded on the document enclosed in the envelope with the window is in contact with the hologram relief surface of the transparent relief hologram sheet in the state enclosed in the envelope. Since the hologram is only separated by the thickness of the transparent relief hologram sheet, the hologram imaging position is 2.0 mm or more away from the hologram forming surface (hologram relief surface). The influence can be suppressed. Further, in the relief hologram, when the image forming position is separated beyond 20 mm, the visibility of the reproduced image is lowered.
Further, in the above meaning, volume holograms such as Lippmann holograms are inappropriate, and the object of the present invention is a “relief hologram” that has excellent transparency and low scattering of light passing through.

In addition to the “relief hologram that can be visually recognized with normal illumination light (this hologram contributes to improving the opening rate of envelopes) as described above, the transparent relief hologram sheet of the present invention can multiplex-record the following predetermined relief holograms. (Multiple formation).
That is, a line segment perpendicular to the “surface” of the relief hologram forming surface of the transparent relief hologram sheet (here, “surface” means one “plane”) is formed, and the direction of this line segment Is set to “0 degree”, and light that illuminates the “surface” of the relief hologram forming surface from the direction that makes an angle of 10 to 45 degrees with respect to this “0 degree” (to the “surface”) Assuming a grazing incidence illumination light with an incident angle of 10 degrees to 45 degrees (meaning “reference light” in a hologram), when illuminated with this specific illumination light, When a hologram reproduction image (which means a part corresponding to the area) is reproduced in the grid-like one reproduction area that appears in the “0 degree” direction, the grid adjacent to the front, back, left, and right A hologram reproduction image appears in the eye-shaped area. Not, in a grid pattern of the reproduction area of the further next, but again, a hologram reproduced image (ibid.) As appears hologram reproduced image.
In other words, the stereoscopic image is “a bright area exists in a grid pattern”.
Such a hologram is the simplest method,
A “black and white plane image” in which the grids are laid out is defined as “object”, and light transmitted through this “object” (or reflected light is also possible) is defined as “object light” and covers the above incident angle range. Relief hologram recording is performed by using “light source light” (which may be the light source itself, but may be light obtained by expanding the light source light to a necessary region using a predetermined optical system) as “reference light”. Can be obtained. Of course, this hologram recording is recorded (in a multiplex recording system) on top of the hologram recording which can reproduce the ornamental relief hologram with normal illumination light.

When this relief hologram is illuminated with “light source light” that covers the incident angle described above (illuminated as reproduction light), a “black and white planar image” having a grid pattern in the “0 degree” direction is reproduced, and an ornamental hologram is reproduced. The image also appears in a different direction. (Although they may be in the same direction, if they are in the same direction, they may hinder viewing under normal illumination light.)
An optical copying machine or a copying machine (also collectively referred to as a copying machine) has a light source for illuminating a copy original within the above-described incident angle range. Therefore, the windowed envelope having the transparent relief hologram sheet of the present invention is used. When copying the window, the above-described “black and white plane image” is reproduced on an image pickup device such as a CCD (CHARGE COUPLED DEVICES) that picks up “information on the document”, and “information on the document” (on the document) If this information is a black and white document, it will be contrast information for “white” and “black”.) It becomes impossible to recognize.
The address information etc. in the window part of the envelope with the window is usually “black and white information” and the font size is “character information” of 5 to 20 points, or the data size is 0.5 to 5 mm. Since it is “one-dimensional or two-dimensional barcode information”, when the above-described “monochrome planar image” overlaps, it becomes very difficult to read the original information.
In particular, the higher the contrast between the “bright area” of the grid-like hologram reproduction image and the “dark area (area without the reproduction image)” than the contrast of the original “character information”, etc. The contrast of the original “character information” or the like in the image pickup apparatus becomes smaller (by automatically adjusting the maximum contrast value to a predetermined value), making it more difficult to copy the original document.

Since the magnitude of the contrast between the “bright area” and the “dark area” is proportional to the reproduction efficiency of the hologram reproduction image, that is, the diffraction efficiency, the diffraction efficiency is preferably larger in the above-described range.
Furthermore, a method of making the ornamental relief hologram itself a three-dimensional image composed of a grid-like reproduction area without separately preparing a “black and white planar image” is suitable for increasing the diffraction efficiency. Yes (means that the more holograms are multiplexed, the lower the diffraction efficiency of each hologram reproduction image).
For example, when recording a relief hologram by a photographing method, a non-reflective coating is applied to the surface of the stereoscopic image in a grid pattern, and the reflected light (object light) from the stereoscopic image itself has a grid pattern contrast. Alternatively, a grid-like shielding plate may be provided on the light path of the object light so that the object light has a grid-like contrast as a result.
Of course, when the CGH method is adopted, the object light can be easily formed in a grid pattern, which is more preferable.
In addition, the “reference light” when recording the “monochrome flat image” is not set as the “surface covering the entire area” as described above, but is set at a discrete angle, for example, “incident angle of 10 degrees”, Even if only three directions of “30 degrees” and “45 degrees” are used, and these are individually (or simultaneously) multiplexedly recorded, substantially the same effect appears.

Further, it is not clear from which direction the illumination light for copying is applied when copying, not only with respect to the “perpendicular direction” to the “plane” of the relief hologram forming surface, but also with the “in-plane angle”. Therefore, if possible, it is preferable to assume all directions of 360 degrees from the viewpoint of copy prevention. However, for example, it is efficient and preferable to set “reference light” from the top and bottom and the left and right directions in front of the envelope addressing portion.
When copying information in the windows of many envelopes, it is assumed that the envelopes are automatically fed. Therefore, the illumination direction of a copying light source such as a copying machine is limited to the top and bottom of the envelope. This is because it is assumed. Furthermore, from the reproduction characteristics of the relief hologram, even if the reference light illumination direction at the time of hologram reproduction is different from that at the time of recording, a sufficient reproduction image is reproduced at an angle according to the illumination direction, so that “0 degree” The influence on the reproduced image in the direction is small.
The size of the grid-like reproduction area is the size of the grid at the time of hologram reproduction, and the size may be any size that prevents reading of address information, etc. A part of the entire character information is copied as a polygon, circle, ellipse, or other geometrical pattern such as a square with a side length or maximum width of 20 mm to 40 mm. Make it impossible. This is because the meaning of the “personal information” is lost when only the “name” or “name” of the “name” that is “personal information” is used. (If “person” can be specified by the combination of “address” and “mr.”, “Mr.” Alone can be positioned as “personal information”, so “address” also needs to be partially uncopyable. .)

For small items, it is also effective to make each character unrecognizable by making it as large as the line width of the character information. In that case, the length of each side and the maximum width Is about 0.1 mm.
If it exceeds 40 mm, the above-mentioned information is “lost” (meaning that the meaning of the entire information cannot be grasped by partially hiding the information), and less than 0.1 mm. As a result, sufficient contrast cannot be obtained as a hologram reproduction image.
Furthermore, since the size of character information or the like is normally 5 to 20 points, in order to “miss” character information or the like of this size, the size of one area of the grid-like reproduction area is More preferably, the size is 0.5 mm to 5 mm.
If it is 0.5 mm or more, the contrast of the “bright area” and “dark area” of the hologram reproduction image is almost the same as the contrast when it is not a grid pattern, and if it is 5 mm or less, it is used for address information etc. A sufficient omission effect can be exhibited with respect to the size of the character information.
Furthermore, the size of the “bright area” and “dark area” is random (in this case, it is not necessary to alternate between “bright” and “dark” exactly, and it is effective for “missing”). "Light" and "Dark" are set so that it becomes the same)), and the act of associating and reproducing the original information from the copied material is made more difficult.

In addition, when delivering to a post office as “postal matter”, it is necessary to be able to perform “sorting” processing without any problem with the postal sorting machine installed at the post office. When reading is performed, it is necessary to set so that the “monochrome flat image” as described above is not reproduced in the “0 degree” direction.
For this reason, the incident angle of “θ ± 5 degrees” or “θ ± 10 degrees” with respect to the “illumination angle θ of the illumination light source” when reading the address information or the like in the postal sorting machine is recorded at the relief hologram. It is necessary to exclude it from the “reference light”.
As a result, when the address information is read by the mail sorting machine, the above-described “black and white plane image” can be read without being applied to the imaging unit of the mail sorting machine. In other words, when mail is sent out to a designated post office, the above θ is set according to the specification of the mail sorting machine adopted by the designated post office.
If it is less than “± 5 degrees”, the above-mentioned “black and white plane image” will be applied to the image pickup unit of the postal sorting machine, and the effect excluding this incident angle range will fade, and if it exceeds “± 10 degrees” A portion overlapping with the incident angle of the illumination light of the copying machine is generated, and the effect of preventing copying is reduced.

By the way, the relief hologram gives a phase difference to the light passing through or reflected by the fine unevenness, and this phase difference reproduces the hologram. Hereinafter, an example in which the hologram relief is formed only on one surface will be described. However, the hologram relief layer may be formed on both surfaces of a transparent resin film. It may be provided.
When passing, the phase difference is simply set to d as the depth of unevenness, and n is the refractive index of the resin, and air (refractive index = 1) is simply calculated from nxd when passing through the resin. Subtracting 1 × d when passing, that is, phase difference = (n−1) d.
However, in the case of reflection, since the situation is more complicated and reflection occurs at the interface with “air” where the unevenness is in contact, for example, light is irradiated from the uneven surface side, and the resin is irradiated with light. Is reflected at the “interface between air and resin (where irregularities exist)”, the refractive index of air is 1, so that the phase difference is 2d (phase difference = 2d )
Alternatively, light is irradiated from the resin surface, the light passes through the resin, and the light is reflected at the “interface between air and resin (where irregularities exist)” before exiting the resin. In this case, since the refractive index of the resin is n, the phase difference is 2nd (phase difference = 2nd).

The hologram reproduction efficiency, for example, the diffraction efficiency of the diffraction grating, for example, a laminar grating with a resin refractive index n = 1.5, where the depth of the fine irregularities is h, is simplified as follows. .
・ Assuming the wavelength λ of incident light, the incident angle α of incident light, and the diffraction angle β of diffracted light, the optimum value (optimum depth) of “h” that maximizes the diffraction efficiency is
-Incident from the air side: optimum depth h1 = λ / 2 (cos α + cos β)
-Incident from the resin side: optimum depth h2 = λ / 2 × 1.5 (cos α + cos β)
Therefore, based on the optimum depth at the time of incidence from the resin side, the optimum depth at the time of incidence from the air side is 1.5 times that depth.
For example, when a hologram relief is provided on the back side of a transparent relief hologram sheet, the development time is adjusted in the development of an electron beam resist or a photoresist, and the depth is adjusted for back side viewing (incident from the air side). Optimization)), a clear hologram reproduction image can be seen from the back surface, and the depth from the front surface is only 2/3 (about 70%) of the optimum value. It corresponds to the hologram relief that it has, and its diffraction efficiency is greatly reduced, so that only unclear and dark holograms can be seen.
The tendency becomes more prominent when the refractive index of the resin (up to about 1.8) or the refractive index of the hologram forming portion as a transparent inorganic material is further increased (up to about 3.0). .

As described above, the sharpness of the hologram reproduction image is greatly influenced by the phase difference given to the reference light. Theoretically, the fineness in the “light interference fringe” region formed by the reference light and the object light is theoretically determined. What gives a "phase difference" equal to the fine "phase distribution" in the region gives the sharpest reproduced image without distortion and blur, and gives a "phase difference" that deviates from this "phase distribution" In this case, the sharpness of the reproduced image is significantly deteriorated.
In order to precisely create fine irregularities, not only optical methods, but also electron beam lithography equipment can be used to create precisely designed relief structures that produce more precise and complex reproduction light. Good. This relief shape depends on the wavelength (range) of the light or light source for reproducing or reproducing the hologram, the direction and intensity of reproducing or reproducing, and taking the above setting conditions into consideration, and the uneven pitch and depth, Alternatively, a specific periodic shape is designed. The pitch (period) of the unevenness depends on the reproduction or reproduction angle, but is usually 0.1 μm to several μm, and the depth of the unevenness is a factor that greatly affects the reproduction or reproduction intensity, but is usually 0.1 μm. ˜1 μm.
Furthermore, in order to improve the reflectance at the hologram relief interface, it is also preferable to follow the hologram relief to form a thin film having both transparency and reflectivity, such as a transparent metal compound thin film.

  According to the present invention, in the envelope with a window, it is possible to ensure a large area, in the “window” portion assigned to the address, etc., that is, to confirm whether the recipient is the person himself or his family, A transparent relief hologram sheet that can sufficiently visually recognize the address underneath the address window for visual recognition and / or can be recognized without hindrance to optical machine reading such as a mail sorting machine. By providing it, it is possible to secure a sufficient size at a single predetermined position on the envelope, sufficiently attract the attention of the customer, improve its opening rate, and directly conduct illegal copying and other acts It is possible to provide an envelope with a window that can be prevented.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
It is a figure in process of the envelope with a window which shows one Example of this invention. It is an envelope with a window (before sealing) which shows one Example of this invention. It is an envelope with a window which shows another Example of this invention (The cross section is also shown collectively. As a document etc., the enclosure is sealed and the address part is formed on the enclosure.). BRIEF DESCRIPTION OF THE DRAWINGS It is a figure (example in which the hologram relief is formed in the one surface) which shows sectional drawing of the transparent relief hologram sheet used for one Example of this invention. The figure which shows sectional drawing of another transparent relief hologram sheet used for one Example of this invention (The example where the hologram relief is formed in the one surface, and is further carry | supported by the transparent base material in the other surface. ).

(Envelope with window, envelope body)
As described above, the envelope with window 1 of the present invention can be processed using various bag making machines. As an example, the transparent relief hologram sheet 4 is placed on the window 3 of the envelope body 2 as described above. It shall be stuck using the appropriate adhesive (not shown) which was done. (See FIGS. 1-3.)
However, as this adhesive, a general pressure-sensitive adhesive or adhesive can be used, but it is particularly preferable to have “removability”.
Adhesives include elastic adhesives such as epoxy / modified silicone resin, thermoplastic resin adhesives, hot-melt adhesives such as olefin resin and EVA, vinyl acetate, EVA and acrylic. Emulsion adhesives, elastomer adhesives, thermosetting resin adhesives, instant adhesives such as alkyl-α-cyanoacrylates, adhesive / adhesive adhesives, rubber adhesives, one-part adhesives, Two-component mixed adhesive, epoxy resin adhesive, reactive acrylic adhesive, polyurethane adhesive, vinyl chloride / vinyl acetate, urethane, polyester, nitrocellulose, etc. Chloroprene rubber-based, nitrile rubber-based, rubber-based solvent adhesives such as SBR rubber-based, epoxy modified, polyvinyl acetal modified, nitrile rubber modified pheno Resin resin, polylactic acid-based adhesive (environmental considerations), and rewet adhesive (recovering adhesiveness by adding water) can be used.
Adhesives include rubber adhesives such as natural rubber, synthetic rubber, and thermoplastic elastomer, acrylic adhesives such as solvent acrylic, emulsion acrylic, liquid ultraviolet curing, and electron beam curing. Addition of tackifiers such as rosin, terpene, and petroleum resin to silicone adhesives such as peroxide curable silicones and addition silicones, polyurethane adhesives, polyester adhesives, etc. And these emulsion types and hot melt types, re-peelable acrylic pressure-sensitive adhesives, slightly pressure-sensitive silicone pressure-sensitive adhesives, polylactic acid pressure-sensitive adhesives (environmentally friendly), and re-humidity pressure-sensitive adhesives ( And the like that restores tackiness by adding water).

These mixed systems can be used, and various additives, that is, various commonly used additives such as extender pigments such as microsilica and calcium carbonate can also be used in the present invention. Depending on the application, they can be used as appropriate by changing or mixing them.
These are called pressure-sensitive adhesives / pressure-sensitive adhesives when they are processed by applying a pressure, for example, and are called heat-sensitive adhesives / pressure-sensitive adhesives when heat-treated.
When applied on “paper”, the formation thickness is 3 μm to 10 μm in consideration of penetration into “paper”. Therefore, it can be made thin and formed with a thickness of 0.5 μm to 3 μm.
Of course, instead of subjecting these materials to pattern printing, it is also suitable to apply (adhere) a double-sided tape having an appropriate width. In particular, when the recipient is required to perform a sealing process, a double-sided tape is applied with the release paper left on the sealed part. (A rewet adhesive or a rewet adhesive may also be used.)
In general, after the transparent relief hologram sheet 4 is placed on the transparent relief hologram sheet 4 formed on the envelope paper at a position of several mm from the opening position of the opening on the envelope, the pattern is formed with a width of about 1 mm and a thickness of about 5 μm. The transparent relief hologram sheet 4 is fixed by applying pressure to the entire transparent relief hologram sheet 4 and being pressure-bonded at the adhesive forming portion.

At this time, the hologram relief forming surface may be on the front side or on the back side (inside the envelope), but when adjusting the hologram relief depth in order to improve the unsealing rate, it faces the back side. Is easier to design. In addition, since the hologram relief surface does not come into contact with other postal items or delivered items during mailing or delivery, there is an advantage that they are not easily damaged.
The envelope main body 2 is for envelope bag making, which is selected from the above-mentioned appropriate adhesives using a general form printing machine or the like in which a bag making unit is set with an envelope upper paper 5 and an envelope lower paper 6. A bag is made with the adhesive 11 and burst-processed to form individual envelopes. A predetermined mark 10 (such as a postal mark) is printed on the envelope upper paper 5 as necessary. (See Figure 1)
The envelope body 2, the envelope upper paper 5, and the envelope lower paper 6 are generally printed paper / information paper, wrapping paper, hybrid paper, or paper used for the envelope, depending on the application. Corrugated cardboard, paperboard board, etc. are appropriately selected and used. The thickness is appropriately selected depending on the application. For example, the continuous weight is 45 kg / six size (metric basis weight 52.3 g / m ² ) to 180 kg / six size (metric basis weight 209.3 g / m ² ). Use high-quality paper.
The individual envelope body 2 is provided with an address portion 8 printed at a predetermined position and an information recording portion 9 printed at other portions, which are separately prepared by using a general sealing / sealing machine. A sealed article consisting of a document or the like 12 is inserted and sealed to become a postal item or a delivery item, and is delivered by postal delivery or home delivery. In the case of postal items, materials are selected and processed in accordance with postal laws and postal rules. (See FIGS. 1 and 3)
It is necessary to take care not to damage the hologram relief surface of the transparent relief hologram sheet 4 adhered during bag making processing or during encapsulation / sealing. Of course, when the opposite surface is damaged, the transparency is lowered, so that sufficient consideration is required to prevent any surface from being damaged such as scratches.

(Transparent relief hologram sheet, hologram forming layer and transparent substrate)
The transparent relief hologram sheet 4 (hereinafter also referred to as “A” or “A ′”) is a single structure of the hologram forming layer 13 (hereinafter also referred to as “hologram forming layer 13”) constituting the transparent relief hologram sheet A (see FIG. 4), or The transparent transparent relief hologram sheet A ′ (see FIG. 5) constituting the transparent base material 14 (hereinafter also referred to as the transparent base material 14) and the hologram forming layer 13 and further, the hologram relief thereof. A reflective transparent thin film (not shown) made of a metal compound material provided so as to follow the surface, a protective layer (not shown) made of a resin having appropriate transparency thereon, and a transparent substrate 14 having a scratch-resistant release layer (not shown) or the like on the surface opposite to the hologram forming layer 13 can be used. Each layer is formed to an appropriate thickness using a generally used method.
The hologram forming layer 13 is made of a transparent resin material or a transparent resin film.
As the transparent resin material or resin film, various thermoplastic resins, thermosetting resins, or ionizing radiation curable resins can be used. Thermoplastic resins include acrylic ester resins, acrylamide resins, nitrocellulose resins, or polystyrene resins. Thermosetting resins include unsaturated polyester resins, acrylic urethane resins, epoxy-modified acrylic resins, and epoxy-modified unsaturated resins. A polyester resin, an alkyd resin, a phenol resin, etc. are mentioned.

These thermoplastic resins and thermosetting resins can be used alone or in combination of two or more. One or more of these resins may be cross-linked using various isocyanate resins, or various curing catalysts, for example, metal soap such as cobalt naphthenate or zinc naphthenate may be blended. Or peroxide such as benzoyl peroxide and methyl ethyl ketone peroxide for initiating polymerization with heat or ultraviolet light, benzophenone, acetophenone, anthraquinone, naphthoquinone, azobisisobutyronitrile, or diphenyl sulfide good.
Examples of the ionizing radiation curable resin include epoxy acrylate, urethane acrylate, acrylic-modified polyester, etc., for the purpose of introducing a crosslinked structure into such an ionizing radiation curable resin or adjusting the viscosity, A monofunctional monomer, a polyfunctional monomer, or an oligomer may be blended and used.
Furthermore, in consideration of the environment, a biodegradable plastic can be used as the hologram forming layer 13.

In order to form the hologram forming layer 13 using the above resin material, it can be formed directly, but it can also be molded using a replication mold.
When thermosetting resin or ionizing radiation curable resin is used, curing is performed by heating or ionizing radiation irradiation while keeping the uncured resin in close contact with the mold surface, and then cured by peeling after curing. The fine irregularities of the relief hologram can be formed on one side of the layer made of a transparent resin material. A diffraction grating forming layer having a diffraction grating formed in a pattern by a similar method can also be used as the optical diffraction structure.
Alternatively, the hologram relief layer can be formed simultaneously with the molding of the resin by various molding methods such as extrusion molding, blow molding, vacuum molding, and calendering to form a hologram forming layer.
Holograms include laser reproduction holograms, white light reproduction holograms, color holograms using these principles, computer generated holograms (CGH), holographic diffraction gratings, holograms composed of composite diffraction gratings, machine-readable holograms, etc. Can be used.
In the present invention, “hologram” is used for viewing and “opening rate improvement” is provided for the purpose, but the so-called anti-counterfeiting means that the envelope with the window is sent from a reliable sender. Is also suitable. For example, when a sender sends an envelope with a window, the recipient fills in the specified personal information on the application form, etc., and sends the enclosed return envelope to the sender. In addition, it is also preferable to be used for the purpose of guaranteeing that the application form is sent to the correct sender.
Then, a predetermined relief hologram for preventing copying is multiplexed-recorded (multiplexed) by the above-described method.

The pitch (period) of the unevenness is usually 0.1 μm to several μm, and the depth of the unevenness is usually 0.1 μm to 1 μm.
As in the case of a single diffraction grating, when the unevenness of exactly the same shape is repeated, as the adjacent unevenness is the same shape, the degree of interference of reflected light increases and the intensity increases, and the maximum value is reached. Converge. Diffraction in the diffraction direction is also minimized. When a single point of an image converges to a focal point, such as a stereoscopic image, the convergence accuracy to the focal point is improved, and a reproduced or reproduced image becomes clear.
Further, in the case of a transparent metal compound thin film, the upper and lower surfaces of the thin film have the same relief shape, and the more uniform the distance between the surfaces (that is, the film thickness), the higher the reproduction or reproduction strength. growing. In addition, if there are irregularities having a period and shape different from the irregularities of the hologram image on the relief surface, this becomes noise during reproduction or reproduction of the hologram or diffraction grating, which causes the image to become unclear.
The relief shape is shaped (also referred to as replication) by using an original plate on which diffraction gratings and interference fringes are recorded in a concavo-convex shape as a press die (referred to as a stamper), on the hologram forming layer 13 or reflecting. The concavo-convex pattern of the original plate can be duplicated by stacking the original plate on the thin film layer (not shown) and heating and pressing them together by an appropriate means such as a heating roll. The hologram pattern to be formed may be single or plural.
In order to accurately reproduce the above-mentioned extremely fine shape and to minimize distortion and deformation such as heat shrinkage after replication, the original plate is made of metal and replicated at low temperature and high pressure.
Therefore, in consideration of the environment, even when a biodegradable plastic is used, those that can be processed at a low temperature, that is, those having a low melting point are preferred, and those having a melting point of 110 ° C. or less are particularly preferred.

For the original plate, a metal having high hardness such as Ni is used. After a Cr or Ni thin film is formed on the surface of a glass master or the like formed by optical photography or electron beam drawing by vacuum deposition or sputtering, Ni or the like is electrodeposited (electroplating, electroless plating, Furthermore, after forming 50-1000 micrometers by composite plating etc., it can make by peeling a metal.
In order to use it for high-pressure rotation type replication, it is necessary to increase the thickness accuracy of this Ni layer, and it is usually ± 10 μm, preferably ± 1 μm. For this reason, you may use the back surface grinding | polishing or the planarization method.
Since the replication method is a high pressure, a rotary method is used instead of a flat plate method, and the linear pressure is 0.1 ton / m to 10 ton / m, preferably 5 ton / m or more. If the diameter of the duplication cylinder is small, the reproducibility of the relief is lowered. Therefore, it is preferable that the duplication cylinder diameter is large. Usually, an arc having a diameter of 0.1 m to 2.0 m, preferably 1.0 m or more is used. To do.
For example, the hologram forming layer 13 on the transparent base material 14 is pressed along the duplication cylinder, and duplication is performed from the back surface (from the transparent base material 14 side) with a metal cylinder at the above pressure. In order to minimize distortion and deformation such as heat shrinkage after replication, a method of heating only a part of the hologram forming layer 13 side rather than heating the entire transparent substrate 14 is desirable. Usually it is heated to 60 ° C to 110 ° C. Furthermore, the precision can be further improved by keeping the metal cylinder on the back surface at room temperature or cooling it.

The transparent base material 14 can be made thin, and preferably has mechanical strength and solvent resistance and heat resistance suitable for processing and processing when producing a transparent relief hologram sheet. Since it depends on the purpose of use, it is not limited, but a film-like or sheet-like plastic is preferable.
For example, various plastic films such as polyethylene terephthalate (PET), polycarbonate, polyvinyl alcohol, polysulfone, polyethylene, polypropylene, polystyrene, polyarylate, triacetyl cellulose (TAC), diacetyl cellulose, and polyethylene / vinyl alcohol can be exemplified. .
Furthermore, in consideration of the environment, it is also preferable to use the above-described biodegradable plastic as the transparent substrate 14.
In the transparent relief hologram sheet 4, a reflective thin film layer (not shown) can be formed so as to contact and follow the hologram relief formed on the hologram forming layer 13. The visibility of the hologram reproduction image can be improved.
Since this thin film needs to reflect incident light, it is not particularly limited as long as it is a transparent thin film having a refractive index higher than that of the hologram forming layer 13.

EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, it is not limited to this. In addition, except a solvent, each composition of each layer is a mass part of solid content conversion.
Example 1
As shown in FIG. 1, roll-type high-quality paper with a continuous weight of 70 kg / six is used for the envelope upper paper 5 and the envelope lower paper 6, and processing of the marginal section 7 and sewing machine processing using a form rotary printing press. Other processing is performed, and the normal printing ink and the usual adhesive 11 (manufactured by the envelope) are applied to the envelope upper paper 5 while performing the opening treatment of the window portion 3 (the opening portion for the address portion 8, 45 mm × 80 mm). Printing processing and paste processing of predetermined fixed information including the mark 10 were performed using a bag glue).
Then, after printing individual information and additional fixed information on the addressing part 8 and the information recording part 9 on the envelope lower sheet 6 with an ink jet printer, the continuous bag making machine having a bag making unit and a window processing part is used. Thus, an envelope body 2 (see FIG. 2) of long size 3 (235 mm × 120 mm) was produced. As a modification thereof, a desired envelope 12 such as a separately prepared document or the like was enclosed in the envelope body 2 (see FIG. 3) to obtain an envelope 1 with a window having a similar window portion. As described above, the address portion may be printed on the document or the like 12 without being printed on the envelope lower sheet.
At this time, a transparent relief hologram sheet 4 cut into 55 mm long and 90 mm wide was prepared as a window film.

First of all, the hologram used for this was taken as an ornamental image using a laser optical system as a “holographic motif” of 30 mm × 70 mm size as a rainbow hologram, and its imaging position as 10 mm from the recording surface.
Furthermore, for copy protection, using a laser optical system, squares with a side of 10 mm are arranged in a grid pattern, and are alternately “white” and “black” from a 40 mm × 70 mm “black and white planar image” printing sheet. Reflected light is “object light” and “reference light” has an in-plane angle of 90 degrees with respect to the hologram recording surface at an incident angle of 10 degrees to 45 degrees (the left and right left and right directions described above). The optical system is set so that the incident light is incident from a distance of 200 mm from the hologram recording surface, and “object light” and “reference light” are caused to interfere on the hologram recording surface. The recorded hologram and the anti-copying hologram are multiplexed and developed to form relief holograms (multiple formed), and the relief surface of the Ni master disk is used to rotate the linear pressure in a rotating manner. At ton / m, 150 ℃, embossed in a transparent unstretched polyethylene film 30 [mu] m, and a transparent relief hologram sheet 4 of Example 1 for use in window envelope 1 of Example 1 (A).

The diffraction efficiency of both holograms (the intensity of diffracted light with respect to incident light) was 5%, respectively, so that the hologram relief was directed to the inside of the envelope.
The pressure-sensitive adhesive (not shown) for the transparent relief hologram sheet 4 is a rubber system (having removability) mixed with fine-particle microsilica and is a rectangle that is 2 mm wide and slightly larger than an opening having a thickness of 5 μm. Pattern.
The encapsulated material is printed separately, printed with individual information such as desired printing and address, etc., A4 size tri-folded, written in 12 etc., the address is the position of the window part 4 of the envelope body 1 The envelope with window 1 of Example 1 was produced and sealed after that.
When I looked at the window of the mail, I was able to appreciate the “painting motif”.
Further, when the mail address information portion was copied by a commercially available copying machine, a copy was obtained in which the above-described black and white flat image was recorded on the address portion of the copy.
Furthermore, when this mail piece was opened and the transparent relief hologram sheet 4 (A) was peeled off from the window portion 3, there was no adhesive residue at all, and it was considered suitable for ornamental use.
From the above, it was considered that the envelope with the window of Example 1 has an effect of improving the opening rate and also has an effect of preventing copying.

(Example 2)
The transparent relief hologram sheet 4 is a 16 μm transparent polyethylene terephthalate film as a transparent base material 14 constituting the transparent relief hologram sheet, and the following hologram forming composition is applied by a gravure reverse coating method and dried. In the same manner as in Example 1, except that the laminate (A ′) is a hologram forming layer 13 constituting a 5 μm thick transparent relief hologram sheet, I got mail.
<Hologram-forming composition>
Melamine resin (n = 1.56) 20 parts Toluene 40 parts Methyl ethyl ketone 40 parts Same as Example 1 except that the handleability during processing of the envelope body 2 has been improved. As a result, the same good results as in Example 1 were obtained.

Example 3
Example except that a 40 mm × 70 mm “black and white flat image” printing sheet in which squares with a side of 1.0 mm are arranged in a grid pattern and alternately “white” and “black” is used for copy prevention In the same manner as in Example 1, the envelope with window 1 of Example 3 and its mail were obtained.
When evaluated in the same manner as in Example 1, except that the above-described fine black-and-white planar image overlaps the address information characters at the address portion of the copy, and the characters are more difficult to read. The same effect as in Example 1 was obtained.
Example 4
For copy prevention, a star shape with a size of 5.0 mm to 10 mm is randomly arranged vertically and horizontally, the inside of the star shape is “white”, the gap is “black”, and a 40 mm × 70 mm “monochrome flat image” printing sheet Except having used, it carried out similarly to Example 1, and obtained the envelope 1 with a window of Example 4, and its mail.
When evaluated in the same manner as in Example 1, the above-mentioned star-shaped black and white flat image was superimposed on the address information characters at the address portion of the copy, and the copy was difficult to read. The same effects as in Example 1 were obtained.

(Example 5)
Except for ornamental and anti-copying purposes, using laser optical system, except that the 30mm x 70mm size "painting motif" was printed in a 5.0mm size grid pattern with anti-reflection ink printing. In the same manner as in Example 1, the envelope with window 1 of Example 5 and the postal matter thereof were obtained.
When evaluated in the same manner as in Example 1, the ornamental “painting motif” can be sufficiently recognized, and the above-described “painting motif” light and dark and a grid-like black-and-white image are addressed at the address portion of the copy. The same effects as in Example 1 were obtained except that the information was superimposed on the information characters and the characters were difficult to read.
(Example 6)
For copy protection, using a laser optical system, 10mm squares are arranged in a grid pattern, and the reflected light from a 40mm x 70mm "black and white flat image" print sheet that is alternately "white" and "black" As “object light” and as “reference light”, the hologram recording surface has two incident angles of 10 ° to 25 ° and 35 ° to 45 ° and has an in-plane angle of 90 ° ( The above-mentioned direction that spreads left and right on the top and bottom is set to be the incident light that is incident from a distance of 200 mm from the hologram recording surface, and “object light” and “reference light” are transmitted to the hologram recording surface. The envelope with window 1 of Example 6 and its postal matter were obtained in the same manner as in Example 1 except that the above-described interference hologram and the above-described hologram for preventing copying were multiplexed and recorded. .

The postal matter sealed with the windowed envelope 1 of Example 6 is compliant with a normal postal matter type 1 postal item (sealed letter), and is optically transmitted by a mail sorting machine (illumination light incident angle 30 degrees) at the time of mailing. There was no problem in reading the address.
Other effects were also good as in Example 1.
(Comparative example)
Comparative Example 1 A windowed envelope of Comparative Example 1 was obtained in the same manner as in Example 1 except that the hologram relief was not embossed on a 30 μm transparent unstretched polyethylene film.
The envelope with window was evaluated in the same manner as in Example 1. As a result, it did not have any characteristics, attracted the attention of the recipient, and could not be expected to improve the opening rate. Could be copied.
[Diffraction efficiency measurement method]
: Light source: Semiconductor laser: Kiko Giken MLX standard collimated laser: Voltage DC 4.8-6.5V, beam diameter expansion 6mm during parallel light
: Efficiency: reflected light intensity / incident light intensity * 100 (%)

A Transparent relief hologram sheet (single layer structure)
A 'Transparent relief hologram sheet (two-layer structure)
1 Envelope with window (including two forms)
DESCRIPTION OF SYMBOLS 2 Envelope main body 3 Window part 4 Transparent relief hologram sheet 5 Envelope upper paper 6 Envelope lower paper 7 Marginal part 8 Addressing part 9 Information recording part 10 Mark 11 Adhesive (adhesive for envelope bag making)
DESCRIPTION OF SYMBOLS 12 Document etc. 13 Hologram formation layer which comprises a transparent relief hologram sheet 14 Transparent base material which comprises a transparent relief hologram sheet

Claims (3)

In an envelope with a window provided with a transparent window, the transparent window is an envelope with a window composed of a transparent relief hologram sheet in which a relief hologram is formed on at least one surface thereof,
In addition to the ornamental relief hologram that can be visually recognized with normal illumination light, the relief hologram has an angle of incidence of 10 degrees to 45 degrees, and the incident angle is 10 degrees to 45 degrees. An envelope with a window, wherein a relief hologram for copy prevention for reproducing a hologram reproduction image having reproduction areas alternately in a grid pattern is formed in a direction.   The envelope with a window according to claim 1, wherein a size of one area of the grid-like reproduction area is 0.5 mm to 5 mm.   The incident angle of the oblique incident illumination light is obtained by removing an incident angle region of oblique incident illumination light of an illumination light source of a mail sorting machine used for the envelope with window. Or the envelope with a window of 2.

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