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. 01, 1994
Filed:
Aug. 20, 1992
Yoshinori Sato, Yamato, JP;
Yoshitugu Funada, Yokohama, JP;
Yoshitaka Houseki, Hikone, JP;
Koji Nagura, Nagahama, JP;
Diafoil Hoechst Company, Ltd., Tokyo, JP;
Abstract
A novel film material for thermal stencil sheets is disclosed. The film comprises a biaxially stretched polyester film which contains 0.1-5.0% of fine particles having an average diameter of 0.05-2.0 .mu.m and has a melting point of 170.degree.-230.degree. C. and a thickness of 0.5-2.5 .mu.m and the maximum value of an average longitudinal and transversal thermal construction stress of the film at a temperature of 100.degree.-160.degree. C. is 500-1500 g/mm.sup.2. The film for heat-sensitive mimeographic printing stencil sheets of the present invention is excellent in handling property sensitivity to thermal perforation, resolution in printing, tone property and curling resistance and thus the invention is industrially very significant.