Plate making method and screen master

Patent metadata

Field	Value
Publication number	US-9427950-B2
Application number	US-201514819996-A
Country	US
Kind code	B2
Filing date	Aug 6, 2015
Priority date	Aug 28, 2014
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

An ink image is formed on the side of a gauze of a screen master by discharging ink by an ink discharge apparatus, and collected visible rays or infrared rays are irradiated onto the ink image to heat the ink. Then, a thermoplastic resin film is perforated to form a plate making image corresponding to the ink image. The minute ink drops discharged from the ink discharge apparatus are held inside minute opening portions (pixels) of fibers configuring the gauze, and are put on the thermoplastic synthetic resin film bent by gravity. Thermosensitive perforation is carried out in this state, and thus a high-definition plate making image corresponding to the image configured using the ink drops in units of pixels can be obtained.

First claim

The invention claimed is:

1. A plate making method of a screen master formed by pasting a gauze and a thermoplastic resin film to each other, the method comprising the steps of:
discharging ink by an ink discharge apparatus to form an ink image on the side of the gauze of the screen master; and
melting the thermoplastic resin film by heating the ink after irradiating collected visible rays or infrared rays onto the ink image from the side of the gauze to form a plate making image corresponding to the ink image.

2. A plate making method of a screen master formed by pasting a gauze and a thermoplastic resin film to each other, the method comprising the steps of:
forming an ink holding layer made of material having an excellent affinity for ink on the side of the gauze of the screen master;
discharging ink by an ink discharge apparatus to form an ink image on the side of the gauze of the screen master; and
melting the thermoplastic resin film by heating the ink after irradiating collected visible rays or infrared rays onto the ink image from the side of the gauze to form a plate making image corresponding to the ink image.

Assignees

• Riso Kagaku Corp

Inventors

• Oshio Susumu
• Nakano Kazuo

Classifications

• B41N1/00

  Printing plates or foils; Materials therefor · CPC title

• B41C1/147 Primary

  by imagewise deposition of a liquid, e.g. from an ink jet; Chemical perforation by the hardening or solubilizing of the ink impervious coating or sheet · CPC title

• B41C1/055 Primary

  Thermographic processes for producing printing formes {, e.g. with a thermal print head}(B41C1/02 takes precedence; {fabrication of relief or intaglio plates by ablative recording with a laser beam B41C1/05; production of lithographic forms B41C1/10; producing of screen printing forms or stencils B41C1/14}) · CPC title