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Stencil printing device

A technology of stencil printing and stencil, which is applied in printing, printing machines, printing processes, etc., can solve the problems of discrete reproducibility and discrete ink transfer volume, etc., to suppress costs, increase dispersion of adhesion, and suppress dispersion of adhesion Effect

Inactive Publication Date: 2009-07-01
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, under the control conditions based on the above-mentioned conventional knowledge (recognition) without considering the dispersion of the transfer amount of ink supplied from one perforation point, the heat-sensitive stencil base paper is perforated and the ink Transfer from printing cylinder to printing paper for printing
[0017] Therefore, although there is no problem with the image reproducibility of solid images and dot-intensive parts for the above reasons, there is a problem of reproducibility in parts corresponding to photographic images and in printed matter made in the plate-making mode corresponding to photographic images. The problem of large dispersion of sex

Method used

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Embodiment Construction

[0067] Below, based on Figure 1 to Figure 12 , to describe the first embodiment of the present invention.

[0068] First, based on figure 1 , the overall structure of the stencil printing device of this embodiment and the outline of the stencil printing process will be described.

[0069] On the upper part of the device main body 50, a document reading part 80 having an automatic document feed (ADF) function is provided, and a printing cylinder part 100 having a porous printing cylinder (printing cylinder) is provided in the central part below it. Plate cylinder) 101. On the upper right side of the printing cylinder part 100, a plate making device 90 is arranged, and on the upper left side of the printing cylinder part 100, a typesetting device 70 is arranged. Also, a paper feeding device is arranged below the plate making device 90 110, under the printing cylinder part 100, a press part 120 is set, and under the typesetting device 70, a paper discharge part 130 is set.

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Abstract

An object of the present invention is to provide a stencil printing method capable of reducing variations in reproducibility and obtaining high-quality images even in high-definition images such as photographic images. Control the recording device so that the proportion of the value obtained by subtracting the following area from the aforementioned area with respect to the area of ​​the thermoplastic resin film facing the recording device perforated by the recording device and the possible ratio in 1 square inch The relationship between the number of perforation points satisfies the following formula: Sp=(Sf-Sk) / Sf; Sp≤0.0143×X0.2780, wherein said area refers to the opposite side of the surface of the thermoplastic resin film facing the recording device The area of ​​the surface perforated by the recording device, wherein, Sp: area ratio; Sf: the area of ​​the perforated part after the surface of the thermoplastic resin film facing the recording device is perforated; Sk: the area of ​​the thermoplastic resin film facing the surface of the recording device The area of ​​the perforated portion after the surface on the opposite side is perforated; X: the number of perforable points in 1 square inch.

Description

technical field [0001] The invention relates to a stencil printing method, which is to roll the heat-sensitive stencil base paper (hereinafter referred to as "original plate") made into a plate onto the outer peripheral surface of a printing cylinder, and use a pressing mechanism such as a pressing roller or a printing mechanism to press and record media for printing. Background technique [0002] In the stencil printing device, the original plate is rolled onto the outer peripheral surface of a porous printing cylinder (plate cylinder) having an ink supply mechanism inside, and a pressing roller arranged so as to be free to contact and separate from the outer peripheral surface of the printing cylinder is used. Pressing mechanism such as printing paper is pressed onto the printing cylinder for printing. The original plate is punched by recording equipment such as thermal head based on the reading data of the original or the data received from external connection equipment. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41C1/14B41F15/08B41F15/34B41J2/32B41J29/38B41N1/00
Inventor 木户浦康宣加藤肇
Owner RICOH KK