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Silk screen process
   
Document Number
US Patent 5015557
Issued Date
May 14, 1991
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Inventors
Mais; Ralph G. (Ft. Lauderdale, FL)
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Abstract
A method for coating a printing screen with a sealer to avoid pinholing and damage to the screen from extended use. The method includes coating the inside of the screen with a photo emulsion, exposing the emulsion to the image to be printed, and etching out the exposed screen. Next, applying to the outside surface of the etched out screen a sheet of easy removable pressure sensitive vinyl, and next treating the etched out screen with a sealing composition, which provides a protective barrier for that part of the screen that prevents ink from printing. The sealing composition is advantageously a two part epoxy resin or an air-moisture curing urethane polymer.
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Silk screen process - US Patent 5015557 Drawing
Drawing from US Patent 5015557
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Number of Claims:
4
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Owner
Published
May 14, 1991
Application Number
07/407,053
Filed
September 14, 1989
US Classification
430/308   430/18 430/256 430/258 430/309
Int'l Classification
G03F   7/12   (20060101)   B41C   1/14   (20060101)  
Assistant Examiner
Attorney/Law Firm
USPTO Field of Search
430/18   430/256   430/258   430/308   430/309   427/143   101/128.21   101/128.4   101/129  
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Polymeric ledges on a metal stencil screen are made using a polymeric layer which is partially removed by a developer solution.

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