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:
Oct. 14, 2003
Filed:
Aug. 30, 1999
Masahiro Matsuura, Tokyo, JP;
Riso Kagaku Corporation, Tokyo, JP;
Abstract
The present invention provides a heat-sensitive stencil sheet providing excellent printing images by preventing deterioration of susceptibility to perforation by a thermal head even when the sheet is wound up into a roll or is stacked with another sheet for a long period of time, and comprising a thermoplastic resin film of constant smoothness laminated onto a porous support, the surface of the porous support having a PPS surface smoothness of 1.2 &mgr;m or less, at the side opposite to that facing the thermoplastic resin film, as measured while a separate film having a PPS surface smoothness of 0.0 &mgr;m and a thickness of 0.1-10 &mgr;m is pressed against the surface of the porous support.