The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 03, 1992
Filed:
Jul. 06, 1988
Applicant:
Inventors:
Takanori Hasegawa, Tokyo, JP;
Shoichi Ikejima, Tokyo, JP;
Assignee:
Riso Kagaku Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29B / ; B29C / ;
U.S. Cl.
CPC ...
156231 ; 156238 ; 15624424 ; 156289 ; 264213 ;
Abstract
A process for producing a thermal stencil master sheet for stencil printing, which sheet, even when a thermoplastic film affording superior perforation properties but having low mechanical strengths is used therefor, can prevent the film from being broken to thereby improve its productivity is provided, which process comprises a step of laminating thermoplastic films onto both the surfaces of a base film, a step of bonding porous substrates onto the thermoplastic films and a step of stripping the thermoplastic films bonded to the porous substrates from the base film.