JP4357404B2 - Printing device - Google Patents

Description

  The present invention relates to a printing apparatus.

  As a printing apparatus for continuously printing a label design, there is a printing apparatus disclosed in Japanese Patent No. 2958640 according to the prior application of the applicant. Specifically, this printing apparatus is a printing apparatus having a plurality of printing mechanisms each having a cylindrical plate cylinder and a cylindrical impression cylinder for printing on a printing medium such as a rolled label paper with release paper. is there.

  In order to eliminate the waste of the printing medium by reducing the distance between the label designs as much as possible, this printing apparatus performs the printing by sequentially feeding the printing medium, and then the printing medium is slightly reversely fed, and thereafter In the intermittent feed type, the process of sequentially feeding the printing medium again and performing printing is repeated.

  By the way, in order to create a color that cannot be expressed by a single printing operation by the printing mechanism, it is necessary to perform printing on the printing portion by using another printing mechanism arranged in parallel in the feeding direction of the printing medium.

Japanese Patent No. 2958640

  However, in the case of a method that uses a plurality of printing mechanisms for printing a color that cannot be generated without overlapping, a desired one color is generated in a printing apparatus having four printing mechanisms for four-color printing, for example. Therefore, if two printing mechanisms are used, the remaining printing mechanisms are two, and four-color printing cannot be performed, and three-color printing is unavoidable. If one additional printing mechanism is added, that is, if the printing device is for five colors, four colors can be printed with one color being overprinted, but the printing device for five colors is for four colors. Naturally, the size of the apparatus becomes larger and the cost becomes higher than that of the printing apparatus.

  In addition, it is possible to print the colored print medium once passed through the printing mechanism of the printing apparatus into the printing apparatus again, but it is troublesome and troublesome. .

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and provides an extremely practical printing apparatus capable of overlapping and printing on a printing portion of a printing medium with a single printing mechanism. .

  The gist of the present invention will be described with reference to the accompanying drawings.

The printing medium 5 that is supplied by repeatedly performing the forward feed and the reverse feed according to the relational expression of the forward feed amount> the reverse feed amount is sequentially printed by the plurality of printing mechanisms 4 having at least the plate cylinder 1 and the impression cylinder 2. In the intermittent feeding type printing apparatus configured as described above, the printing cylinder 4 of the printing mechanism 4 includes a first printing unit and a printing unit 6 of the printing medium 5 printed by the first printing unit. Is provided with a second printing section that performs overlapping printing in the same color as the first printing section, and the second printing section performs overlapping printing on the printed section 6 of the print medium 5 printed by the first printing section. The present invention relates to a printing apparatus that is configured so as to be able to do this.

The printing apparatus according to claim 1, wherein the print medium 5 includes an infeed roller 7 and an outfeed roller 8 having the same diameter that rotate forward and backward at the same speed, and the infeed roller 7 and the outfeed roller 8. The present invention relates to a printing apparatus characterized in that forward and reverse feeds are repeatedly performed by a control unit that performs rotation control.

Further, in the printing apparatus according to any one of claims 1, wherein the second printing section, overlaps a portion 9 of the printing section 6 of the printing medium 5 which is printed by the first printing unit The present invention relates to a printing apparatus configured to perform printing.

The printing which is characterized in that in the printing apparatus, wherein the first printing unit only to the printing mechanism 4 and the second printing unit on the most upstream side is provided according to any one of claims 1 to 3 It concerns the device.

The printing apparatus according to any one of claims 1 to 4, wherein a transparent or translucent member is employed as the print medium 5.

  Since the present invention is configured as described above, a single printing mechanism can perform printing on a print target portion of a print medium in an overlapping manner, and an arbitrary number without increasing the size of the apparatus and reducing the number of color schemes. Thus, a printing apparatus with excellent practicality capable of producing any of the above colors with as few printing mechanisms as possible.

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

  The first printing unit of one printing mechanism 4 prints the printing target part 6 of the printing medium 5 to be sequentially fed, and then reversely feeds the printing medium 5 by a predetermined amount so that the printing target part 6 has the second printing part. Then, the printing is performed again, and after the printing on the printing section 6 is completed, the printing is performed by the next printing mechanism 4.

  Therefore, according to the present invention, it is possible to produce an arbitrary number of arbitrary colors with as few printing mechanisms as possible, and it is possible to prevent an increase in the size of the apparatus and a decrease in the number of colors.

  Specific embodiments of the present invention will be described with reference to the drawings.

  In the present embodiment, the printing medium 5 such as paper, film, label, etc., which is supplied by repeatedly performing the forward feeding and the reverse feeding according to the relational expression of the forward feeding amount> the reverse feeding amount, at least the plate cylinder 1 and the impression cylinder 2 An intermittent feed type printing apparatus configured to sequentially print by a plurality of printing mechanisms 4 having a first printing unit and printing by the first printing unit. And a second printing unit that performs duplicate printing on the printing unit 6 of the printed medium 5 so that the second printing unit can perform overlapping printing on the printing unit 6 of the printing medium 5 printed by the first printing unit. It is composed of.

  Specifically, in this embodiment, as shown in FIGS. 1 and 2, a plate cylinder (printing unit) is provided on the surface and a plate cylinder 1 provided continuously with the inking device, and a blank cylinder 3 (with a blanket provided on the surface) ( In the case of illustrating a tandem offset rotary four-color printing apparatus in which four sets of printing mechanisms 4 (printing units) each including a transfer roller and an impression cylinder 2 are arranged in parallel, a plate of the printing mechanism 4 on the most upstream side is illustrated. Only the cylinder 1 has a configuration in which the second printing unit is provided at the rear position of the first printing unit.

  A printing medium 5 (in this embodiment, a label sheet in which a backing sheet and a release sheet are bonded via an adhesive layer) conveyed between the blanket cylinder 3 and the impression cylinder 2 is rotated forward and backward at the same speed. The infeed roller 7 and the outfeed roller 8 having the same diameter and a control unit that controls the rotation of the infeed roller 7 and the outfeed roller 8 are configured to be repeatedly forwarded and reversely fed.

  By the infeed roller 7 and the outfeed roller 8, the second printing unit is configured to perform overlapping printing on a part 9 of the printing target part 6 of the printing medium 5 printed by the first printing unit (see FIG. 3). This is because if the printing medium 5 is reversely fed so that the entire printing target 6 printed by the first printing unit is overprinted by the second printing unit, the printing medium 5 does not advance. In the present embodiment, the reverse feed amount at the time of overlapping printing is set to L / 2 or less, where L is the length of the printing part 6.

  Reference numeral 10 denotes an ultraviolet curing device, 11 denotes a cutting mechanism having a cutting part for punching only the release paper of the label paper, and a cutting part for cutting the mount part into a dotted line, and 12 denotes a winding around which the printing medium 5 is wound. Rotating roll, 13 is a take-up roll that winds up the completed label (only the label punched on the backing sheet is pasted), 14 is the unnecessary part of the punched release paper (the outer periphery of the remaining label) A take-up roll to be taken, 15 is a notch, and 16 is a notch for wearing a plate.

  The operation of this embodiment will be described.

  (1) Printed portion 6 of print medium 5 drawn out from winding roll 12 by forward rotation of in-feed roller 7 and out-feed roller 8 by the first printing portion of printing mechanism 4 on the most upstream side and fed forward. To print.

  (2) The infeed roller 7 and the outfeed roller 8 are reversed, and the leading edge of the second printing portion (transfer portion) of the blank cylinder 3 and the leading end of the portion 9 (overlapping printing portion) of the printing portion 6 coincide (synchronization). ), The print medium 5 is reversely fed by a predetermined amount.

  (3) The infeed roller 7 and the outfeed roller 8 are rotated forward, and printing is performed again on a part 9 of the printing portion 6 by the second printing portion on the printing portion 6.

  (4) After overlapping printing by the second printing unit, the infeed roller 7 and the outfeed roller 8 are reversed in order to reduce the distance between the printing parts 6 as much as possible, and the leading edge of the first printing part is printed. The print medium 5 is reversely fed by a predetermined amount so as to match (synchronize) with the next printing location 17 of the medium 5, and then forwardly fed, and the second printing mechanism 4 performs printing of the second color.

  The above-described forward and reverse control of the print medium 5 is repeated, and the desired print medium 5 is obtained by being cut into a desired shape and wound by the cut mechanism provided on the downstream side of the print mechanism 4.

  When the printing medium 5 is reversely fed and synchronized with the printing unit of the printing mechanism 4, not only the printing medium 5 but also the plate cylinder 1, the blank cylinder 3, and the impression cylinder 2 may be set to be slightly reversed.

  When a member such as a transparent or translucent film is used as the printing medium 5, it is difficult to produce an arbitrary color by a single printing. The features of this embodiment that can be printed are particularly exhibited.

  In this embodiment, the offset rotary printing mechanism is employed, but the same applies to the case where other printing mechanisms such as a letterpress rotary printing mechanism are employed.

  Further, in this embodiment, the first printing unit and the second printing unit are provided in the printing mechanism 4 on the most upstream side, but the configuration may be provided in the plate cylinder 1 of the other printing mechanism 4.

  If three or more printing parts are provided on the plate cylinder 1, overprinting can be performed three or more times.

  Since the present embodiment is configured as described above, the first printing unit of one printing mechanism 4 prints the printing target part 6 of the printing medium 5 to be sequentially fed, and then reversely feeds the printing medium 5 by a predetermined amount. Then, the second printing unit prints the printed part 6 again, and after the printing on the printed part 6 is completed, the next printing mechanism 4 performs printing.

  Accordingly, in this embodiment, it is possible to perform printing on a print target portion of a print medium by using a single printing mechanism, and any number of arbitrary colors without causing an increase in the size of the apparatus or a reduction in the number of colors. Can be produced with as few printing mechanisms as possible.

It is a structure outline explanatory side view of a present Example. It is a general | schematic expanded side view of the printing mechanism of a present Example. It is an expansion explanatory view of the portion to be printed of the print medium of the present embodiment.

DESCRIPTION OF SYMBOLS 1 Plate cylinder 2 Pressure cylinder 4 Printing mechanism 5 Print medium 6 Printed part 7 Infeed roller 8 Outfeed roller 9 Part of printed part

Claims (5)

It is configured so that a printing medium that is repeatedly fed and fed repeatedly according to a relational expression of progressive feed amount> reverse feed amount is sequentially printed by a plurality of printing mechanisms having at least a plate cylinder and an impression cylinder. In the intermittent feeding type printing apparatus, the plate cylinder of the printing mechanism is the same as the first printing unit on the printing unit of the printing medium printed by the first printing unit and the first printing unit. And a second printing unit that performs overlapping printing with colors , and is configured so that the second printing unit can perform overlapping printing on the printed portion of the print medium printed by the first printing unit. A printing device. 2. The printing apparatus according to claim 1, wherein the print medium includes an infeed roller and an outfeed roller having the same diameter that rotate forward and backward at the same speed, and a control unit that performs rotation control of the infeed roller and the outfeed roller. The printing apparatus is characterized in that the forward and reverse feeds are repeatedly performed by the above. The printing device according to any one of claims 1, wherein the second printing unit is configured to overlap printing a portion of the printing portion of the printing medium which is printed by the first printing unit The printing apparatus characterized by being made. The printing apparatus according to claim 1 any one, most the upstream side of the printing mechanism only the first printing unit and a printing apparatus, characterized in that said second printing portion is provided. The printing apparatus according to claim 1, wherein a transparent or translucent member is employed as the print medium.

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