# US 5,702,863 A · Production method of ink-oozing plate for stamp

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- Number: US 5,702,863 A
- Document ID: US5702863A
- Status: Granted
- Kind: A
- Application number: 08/594,919
- Filed: 1996-01-31
- Granted: 1997-12-30
- Earliest claimed: 1995-02-03
- Assignees: Mitsubishi Pencil Company, Limited
- Inventors: Yoichi Ando
- Web page: https://patentgrep.com/patent/US5702863A

## CPC

- B41C 1/055: 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})
- B29C 33/06: using radiation {, e.g. electro-magnetic waves, induction heating}
- B29C 59/02: by mechanical means, e.g. pressing {(B29C59/007 takes precedence; embossing expanded porous articles B29C44/5627)}
- B29C 2035/0822: {using IR radiation}
- B29K 2021/00: Use of unspecified rubbers as moulding material
- B29L 2031/767: {Printing equipment or accessories therefor}
- Y10S 430/145: Infrared
- Y10S 430/165: Thermal imaging composition
- Y10T 428/24802: Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T 428/24835: including developable image or soluble portion in coating or impregnation [e.g., safety paper, etc.]
- Y10T 428/24843: with heat sealable or heat releasable adhesive layer
- Y10T 428/24876: Intermediate layer contains particulate material [e.g., pigment, etc.]
- Y10T 428/24884: Translucent layer comprises natural oil, wax, resin, gum, glue, gelatin
- Y10T 428/24901: including coloring matter
- Y10T 428/24967: Absolute thicknesses specified
- Y10T 428/24992: Density or compression of components
- B41C: PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES (photomechanical processes for producing printing surfaces G03F; photoelectrical processes for producing printing surfaces G03G)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A production method of an ink-oozing plate for stamp having open cells, in which the production steps and the apparatus are simple, and an ink-oozing plate for stamp which can provide a sharp impress image and is conveniently used, that is, to provide a production method of a stamping plate in which a stamping plate can easily be produced with a small flashlight irradiating energy, including such a method as using a heat transfer sheet coated with a heat transfer substance which generates heat by irradiating with infrared rays and can be transferred, irradiating with infrared rays while pressing a stamp material, and coating an impress image copy with a liquid substance containing water, and thus coming to complete the production method of the ink-oozing plate for stamp of the present invention.

## Claims

### Claim 1

A production method for manufacturing an ink-oozing plate for a stamp, comprising the steps of:
superposing a heat transfer sheet comprising an infrared ray-transmittable film coated thereon with a heat transfer substance on the surface of an elastic resin-made stamp material having stamp ink-impregnable open cells so that said heat transfer substance contacts the surface of the stamp material;
superposing thereon a desired impress image copy so that it becomes a mirror image;
compressing the stamp material;
irradiating with a flashlight containing infrared rays from the upper part of said copy to allow the infrared rays to be transmitted through a copy image-absent part on the impress image copy and cause the infrared rays reaching the heat transfer sheet to heat the heat transfer substance present on a part corresponding to said copy image-absent part;
causing said heat transfer substance to transfer on the surface of the stamp material and melt the surface layer of the stamp material to form a transfer molten part where the open cells are blocked, and
allowing the copy image part on the impress image copy to cut off or absorb the infrared rays to cause no heat transfer substance present on the pan of the heat transfer sheet corresponding thereto to be heated and transferred, which does not lead to blocking the cells present on the surface of the corresponding stamp material, to form a non-transfer part.

### Claim 2 (depends on 1)

A production method of an ink-oozing plate for stamp as described in claim 1, wherein the stamp material is a sheet with a thickness of 0.5 to 30 mm comprising polyolefin series foam in which the melt temperature is 50.degree. to 150.degree. C. and which has fine open cells having a cross-linked network structure and an average pore diameter of 2 to 10.mu., and a porosity of 30 to 80%; and the heat transfer sheet is prepared by coating an infrared ray-transmittable sheet with the heat transfer substance containing at least carbon or a high polymer and having a transfer temperature of 50.degree. to 200.degree. C. to a thickness of 0.5 to 10.mu..

### Claim 3 (depends on 1)

A production method of an ink-oozing plate for stamp as described in claim 1, wherein a flashlight is applied in the state that the stamp material is compressed by 5 to 70% to form a concave part in which the stamp ink-non-oozing part of the stamp material resides at least in a lower plane than the stamp ink-oozing part.

### Claim 4 (depends on 1)

A production method of an ink-oozing plate for stamp as described in claim 1, wherein the impress image copy is coated with a liquid substance.