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:
Sep. 04, 1990
Filed:
Oct. 26, 1988
Applicant:
Inventor:
Bernard Jamet, Compiegne, FR;
Assignee:
Saint-Gobain Vitrage, Courbevoie, FR;
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
2642102 ; 26106 ; 2643 / ; 425135 ; 425367 ;
Abstract
Sheet of polyvinyl butyral is extruded, it is subjected to a humidifying and relaxation treatment by maintaining it stretched between rollers, the sheet of polyvinylbutyral is passed through a cold zone, in particular around cooling drums, so as to fix it, the sheet is rolled under a given tension, and prior to fixing the sheet in the cold zone, the sheet is allowed to form at least one free loop.