JPH058104B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method and apparatus for making a manuscript image on a heat-sensitive stencil paper, and particularly, in a pre-process of irradiating the heat-sensitive stencil paper and the manuscript with electromagnetic waves, It applies liquid to the original.

(b) Conventional technology Conventional plate-making methods and devices (e.g.
(Refer to Publication No. 14258 and Special Publication No. 52-8103)
An ordinary dry manuscript and thermal stencil paper are brought into pressure contact, and electromagnetic waves such as infrared rays and visible light are irradiated from the side of the thermal stencil paper to create a manuscript image on the stencil paper.

This plate-making principle is already well known, but to briefly explain, first, transparent or semi-transparent thermal stencil paper, which has properties that change with heat, is superimposed on the manuscript, and then from the side of this thermal stencil paper, By irradiating infrared rays and utilizing the heat generated by the radiant energy absorbed by the low-brightness areas (black areas) of the original, changes such as discoloration, perforation, or shrinkage along the original image can be caused on the thermal stencil paper. It is something that causes something to happen.

Therefore, perforations and the like that are faithful to the original are formed on the thermal stencil paper, and not only the original image of the original but also blemishes, stains, etc. are printed out at the same time.

(c) Problems to be solved by the invention As mentioned above, in the conventional technology, perforations are formed on the thermal stencil paper that are faithful to the original image, so blemishes and the like are also produced. In some cases, the blemishes, etc., were magnified and printed.

In particular, when a manuscript is copied using an electronic copying machine, fine toner particles that are usually invisible are scattered and adhered to the margins of the manuscript. The toner particles also absorb infrared radiant energy, and a particle image that is larger and more visible than the toner particles is formed on the heat-sensitive stencil paper. Therefore, when printing using heat-sensitive stencil paper made in this way,
This results in a printed matter with countless spots formed in the margins.

Incidentally, if the amount of infrared irradiation is reduced, the spots will certainly be reduced, but the contrast of the entire document image will decrease in the future, resulting in a problem that a good document image cannot be obtained.

(d) Means for solving the problem The specified invention includes a first step of applying a liquid to a document, bringing the document coated with the liquid into close contact with a heat-sensitive stencil paper, and emitting electromagnetic waves from the side of the heat-sensitive stencil paper. This is a plate-making method comprising a second step of forming an original image on a heat-sensitive stencil paper by irradiation.

Furthermore, the invention described in claim 2 is as follows:
a document conveying means for conveying a document; a coating device for applying a liquid to the document while the document is being conveyed; and a coating device located downstream of the coating device along the document conveyance direction, the document being coated with the liquid and a heat-sensitive stencil. This plate-making apparatus is equipped with a pressure contact means for pressing a base paper into contact with each other, and a means for irradiating electromagnetic waves from the heat-sensitive stencil paper side while the document and the heat-sensitive stencil paper are in pressure contact with each other by the pressure contact means.

In each of the above inventions, the liquid to be applied has a heat of vaporization of 100 cal/g to 600 cal/g.

(E) Effect In the present invention, since a liquid is applied in the process before electromagnetic waves are irradiated onto the document, the radiant energy of the electromagnetic waves absorbed by minute spots such as toner particles is absorbed exclusively into the area applied. Consumed to vaporize liquid. Therefore, the intensity of the minute blemish areas does not increase, and no image corresponding to the blemishes can be made on the part of the heat-sensitive stencil paper.

(F) Embodiments The drawings are block diagrams showing different embodiments of an apparatus for carrying out the method of the present invention.

FIG. 1 shows a first embodiment. In this figure, on the left side wall of the apparatus main body 1, there is a document mounting table 2.
It is mounted so that it can rotate clockwise about the support shaft 3 as a fulcrum. Further, a document insertion slot 5 is provided at the base of the document table 2 to insert the document 4 horizontally (to the right).

A tank 7 in which a liquid 6 is stored is fixedly installed above the left side wall of the apparatus main body 1 . A pipe 8 for injecting a predetermined liquid 6 is fixedly connected to the upper part of the tank 7, and a stopper 9 is fitted to the upper end of the pipe 8. Specifically, the liquid 6 stored in the tank 7 is manufactured by Ayako Co., Ltd.
It is the same liquid used in FOG, DOWN, and SPPAY (trademark), but it is not limited to this liquid; any substance with a heat of vaporization in the range of 100 cal/g to 600 cal/g is sufficient for practical use. can be provided. Note that even if a liquid substance falls outside this range, it does not necessarily mean that it cannot be used.

At the bottom of the tank 7, a pipe for discharging the liquid 6 that hangs down from the top of a saucer 10 for the liquid 6 is continuously formed, like a bird's drinking bowl, and at the right end of the saucer 10, , a felt holding member 12 having a U-shaped cross section and having a plate-like felt 11 installed therein;
is rotatably mounted around a support shaft 13 as a fulcrum. The felt 11 and the saucer 10 are in communication with each other, and the liquid 6 in the saucer 10 is configured to ooze out to the lower surface of the felt 11 by capillary action. Although not shown, the support shaft 13
A torsion spring is attached to the felt holding member 12, and the felt holding member 12 is urged to rotate clockwise (onto the upper surface of an upper roller 14, which will be described later).

A pair of application rollers 14 and 15 are provided below the felt 11 to sandwich and convey the document 4 and to apply the liquid 6 to the document 4. Of the pair of application rollers 14 and 15, The felt 11 is pressed against the upper roller 14. Therefore, the liquid 6 exuding on the lower surface of the felt 11 is
It is mainly applied to the front side of the document 4 via the upper roller 14.

Above the felt 11, a heat-sensitive stencil paper 16 (hereinafter simply referred to as paper) wound into a roll is fitted onto a support shaft 17 having light rotational resistance.

Furthermore, an idler 18 is rotatably provided on the downstream side of the pair of application rollers 14 and 15 along the paper feeding direction for accurately positioning the base paper 16 on the original document 4.

On the downstream side of the idler 18, a light emitting device 22 is provided with a transparent glass plate 19 fixed to its lower end and a flash lamp 20 and a reflecting mirror 21 above it. The flash lamp 2
From 0, electromagnetic waves such as infrared rays and visible light are emitted downward in the form of flashes.

A pressing plate 23 made of hard urethane rubber having some elasticity is provided below the transparent glass plate 19 for pressing both the original 4 and the base paper 16 against the lower surface of the transparent glass plate 19. This pressing plate 23 is fixedly installed on a holding stand 24, and this holding stand 24
4 is connected to a cam follower 28 that abuts a cam 27 fixed to a reduction shaft 26 of the motor 25. Therefore, the pressing plate 23 is connected to the motor 25.
When it rotates in one direction, it rises, and when it rotates in the opposite direction, it falls.

Further, as shown in FIG. 5, on the base paper 16, at intervals corresponding to the length of the original image (for example, the first area) that can be formed with one flash of light when forming the original image, Flash timing mark 29
... is attached, and photo sensors 30, 31 detect this flash timing mark 29...
is provided downstream of the light emitting device 22.

On the downstream side of the photo sensors 30 and 31, a pair of conveyance rollers 32 and 33 are provided for integrally conveying the base paper 16 and the original 4 after plate making, and downstream of the pair of conveyance rollers 32 and 33, A cutter consisting of a rotary blade 34 and a fixed blade 35 is provided for cutting the base paper 16 into desired dimensions.

On the downstream side of the cutters 34 and 35, a pair of paper discharge rollers 37 and 38 are provided for discharging the document 4 and the cut raw paper 16 onto a paper discharge tray 36.

39 is a capacitor for the flash lamp 20.

First, the original paper 16 is stretched under the transparent glass plate 19, and when the original 4 is inserted rightward from the original insertion slot 5, the original 4 is passed through the application roller pair 1.
4 and 15, and a thin liquid 6 is mainly applied to the surface side thereof. Then, when the downstream edge of the document 4 coated with the liquid 6 is detected by a photo sensor (not shown), that is, the first region of the document 4 is located between the pressing plate 23 and the transparent glass plate 19. , the application roller pair 14, 15
stops. In this state, the motor 25 starts rotating, and the press plate 23 rises. As the pressing plate 23 rises, the transparent glass plate 19 and the pressing plate 23 are pressed together with the base paper 16 and original 4 overlapped, and when they are sufficiently pressed, the flash lamp 20 is turned on. Emits a flash of light. Then, by this flash of light, a manuscript image is made into a plate in the first area of the base paper 16 (see FIG. 5).

At this time, since the liquid 6 is applied to the front side of the original 4, that is, the side that is in pressure contact with the base paper 16, fine spots etc. formed on the original 4 are removed by the heat of vaporization of this liquid 6. As a result, the temperature rise is suppressed, and images (spots) corresponding to blemishes and the like are not produced on the base paper 16. Note that the reason why images such as minute blemishes are not printed on the base paper 16 is estimated as a result of experiments, and has not been physically elucidated.

When the plate making of the original image in the first area is completed in this way, the motor 25 moves in reverse and the pressing plate 23 is lowered, so that the original paper 16 and the original 4 after the plate making are in a non-squeezed state.

Next, the pair of application rollers 14, 15, the pair of transport rollers 32, 33, and the pair of discharge rollers 37, 38 rotate at a constant speed, and the base paper 16 and original document 4 are transported downstream together. The second flash timing mark 29b is the photo sensor 30,
31, that is, when the second area of the document 4 reaches the lower part of the transparent glass plate 19, the roller pairs 14, 15, 32, 33, 3
7 and 38 all stop.

Thereafter, the same steps as described above are repeated, and a document image is made into a plate in the second area of the base paper 16. At this time, in order to prevent a non-plate-making part from being formed between the first area and the second area of the base paper 16, the intervals between the flash timing marks 29 are determined by the flash lamps. The width is set to be slightly shorter than the width of the reflecting mirror 21 of No. 20 (the length in the conveying direction of the base paper 16).

In this way, for each 4 manuscripts, 1 original paper
By intermittently conveying the 6 etc. six times and flashing the flash lamp 20 six times, a document image is made over the entire area of the base paper 16 (the length of one document). In this embodiment, the entire area of the original image is printed on the base paper 16 by flashing light six times, but this can be achieved by increasing the size and output of the flash lamp 20, etc. Needless to say, the number of times can be reduced.

When the plate making is completed for the entire area of manuscript 4,
Conveyance roller pair 32, 33 and paper ejection roller pair 3
Only 7 and 38 rotate, and the document 4 is delivered to the output tray 36.
is discharged to the top. Immediately thereafter, the rotary blade 34 rotates and the base paper 16 is cut into a predetermined size. In addition, at this time, the base paper 1 corresponding to the second subsequent sheet
6 1st flash timing mark 29
a is detected by photo sensors 30 and 31.

The original 4 and the cut original paper 16 are placed in the output tray 36.
Since they are placed on top, the operator takes them out from above and peels off the base paper 16 and original 4.
It is possible to obtain a base paper 16 that has been completely plate-made.

Next, a second embodiment of the present invention will be described with reference to FIG. The only difference between this embodiment and the first embodiment is the method of applying liquid to the document, so only that difference will be explained. with the symbol
The explanation is omitted. The same applies to the third example and the fourth example below.

In FIG. 2, immediately downstream of the document insertion opening 5, a first document 4 conveyance roller pair 40, 41 is provided that conveys the document 4 before being coated with the liquid 6.
On the downstream side, a gutter-shaped cover 4 with an open bottom
2 are provided. A pipe 43 extending in a direction perpendicular to the conveying direction of the original 4 is fixed to the ceiling of the cover 42 for passing the liquid 6, and this pipe 43 is provided with numerous spray holes. has been done.

A second document 4 conveyance roller pair 44 and 45 is provided on the downstream side of the cover 42 to convey the document 4 after the liquid 6 has been applied.
4, 45, on the support shaft 46 of the lower roller 45,
The upstream end of a guide 47 for transporting the original 4 is rotatably mounted.

When the original 4 is inserted through the original insertion opening 5, the liquid 6 is spray coated on the front side of the original 4.

At this time, until the first area arrives under the transparent glass plate 19, the guide 47 assumes a horizontal position (solid line position), and the document 4 is conveyed in the horizontal direction along this guide 47. Ru. When the plate-making operation for the first area is started, that is, when the first area of the document 4 is pressed between the pressing plate 23 and the transparent glass plate 19, the guide 47 moves the support shaft 46. It rotates clockwise around the center and assumes a vertical posture (position shown by the two-dot chain line). At that time, the first,
Since the second document transport rollers 40, 41, 44, and 45 continue to rotate, the document 4 after applying the liquid 6
The second area of the area temporarily loosens, but the second area of the
When the plate-making operation for the second region is completed, the paper is pulled up downstream by the pair of transport rollers 32, 33, etc. on the downstream side.

In this way, if the original 4 is configured to loosen on the upstream side of the plate-making process, even if the original 4 is intermittently conveyed downstream from the plate-making process, the original 4 will not be loosened in the process of applying the liquid 6 to the original 4. It can be conveyed continuously and the liquid 6 can be applied uniformly.

Next, a third embodiment will be explained with reference to FIG. In FIG. 3, a lower tank 48 for storing liquid 6 is provided inside and below the document insertion opening 5, and an upper tank 49 is provided above the lower tank 48. A pipe 50 and a pump 55 are provided between both tanks 48 and 49 to transport the liquid 6 stored in the lower tank 48 to the upper tank 49, and also to transport the liquid 6 stored in the lower tank 48 to the upper tank 49. A return path 51 is provided which overflows and returns to the lower tank 48 when the amount of 6 exceeds a certain level. 52 is lower tank 4
This is a supply path for supplying the liquid 6 to the liquid 6. A roller 53 for applying the liquid 6, which is made of a porous material such as sponge or felt, is rotatably mounted on the upper tank 49. It is immersed in 6. Above the roller 53 for applying the liquid 6, an auxiliary roller 54 is provided to lightly press the back surface of the document 4 against the roller 53 and convey the document 4.

When the original 4 is inserted from the original insertion slot 5, the original 4 is conveyed downstream by the liquid 6 coating roller 53 and the auxiliary roller 54, and the liquid 6 is applied to the back surface of the original 4. It will be painted.

Note that in this embodiment, the liquid 6 is mainly used for the original 4.
However, if the document 4 is thin, the effect of applying the liquid 6 is sufficient.

Next, a fourth embodiment will be explained with reference to FIG. In FIG. 4, two pairs of document transport rollers 56, 57, 58, 5 are provided downstream of the document insertion slot 5.
9 are arranged in parallel in series, both conveying rollers 56,
Between 57, 58, and 59, there is provided a document conveyance path 60 whose central portion is curved downward. The liquid 6 is stored in the curved portion 61.

When the original 4 is inserted from the original insertion slot 5, the original 4 is moved by both rollers 56, 57, 5.
8 and 59, the original is transported through the document transport path 6
It passes through the liquid 6 stored in the curved part 61 of 0. Therefore, at this time, the liquid 6 is applied to both the front and back sides of the document 4.

(G) Effects of the Invention In the present invention, since the liquid is applied to the document, even if the surface of the document is irradiated with electromagnetic waves, the temperature of minute particles such as toner particles does not rise due to the heat of vaporization. Therefore, such a fine original image is not made into a plate, and unnecessary spots are not formed on the heat-sensitive stencil paper.

Therefore, when using a base paper made by carrying out the method and apparatus of the present invention, clear printed matter with high contrast can be obtained.

[Brief explanation of drawings]

The drawings all show embodiments of the present invention; FIG. 1 is an internal configuration diagram of the first embodiment, FIG. 2 is an internal configuration diagram of the second embodiment, and FIG. 3 is an internal configuration diagram of the third embodiment. FIG. 4 is an internal configuration diagram of the fourth embodiment, and FIG. 5 is a plan view of a heat-sensitive stencil paper that can be used in any of the embodiments. 1...Device body, 4...Document, 5...Document insertion slot, 6...Liquid, 11...Felt, 14, 15
...Application roller pair, 16...Thermal stencil paper, 19
...Transparent glass plate, 20...Flash lamp,
22...Light emitting device, 23...Press plate, 24...Holding stand, 25...Motor, 26...Rotating shaft, 27...
...Cam, 28...Cam follower, 42...Cover, 43...Pipe, 49...Upper tank, 53
...Roller for liquid application, 54...Auxiliary roller,
60... Document conveyance path, 61... Curved portion.

Claims (1)

[Claims] 1. A method for making a manuscript image on thermal stencil paper, wherein the manuscript has a heat of vaporization of 100 cal/g to 600 cal/g.
a first step of applying a liquid, and a second step of forming a document image on the thermal stencil paper by bringing the original coated with the liquid into close contact with the thermal stencil paper and irradiating electromagnetic waves from the side of the thermal stencil paper. A plate-making method consisting of two steps. 2. In an apparatus for making a manuscript image on a thermal stencil sheet, there is a document conveyance means for conveying the document, and a device that applies vaporization heat of 100 cal/g or more to the document while the document is being conveyed.
a coating device for applying a liquid of 600 cal/g; and a coating device located downstream of the coating device in the document conveyance direction;
The apparatus is provided with a pressure contact means for pressing the original and the thermal stencil paper after applying the liquid, and a means for irradiating electromagnetic waves from the thermal stencil paper side while the original and the thermal stencil paper are pressed together by the pressure contact means. Plate making equipment. 3. The plate-making apparatus according to claim 2, wherein the liquid is applied only to the surface of the document. 4. The plate-making apparatus according to claim 2, wherein the liquid is applied only to the back side of the document. 5. The plate-making apparatus according to claim 2, wherein the liquid is applied to both sides of the document.