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:
Dec. 10, 1985
Filed:
Jan. 29, 1985
Joseph Chabal, Gibsonia, PA (US);
Bruce A Bartrug, Natrona Heights, PA (US);
PPG Industries, Inc., Pittsburgh, PA (US);
Abstract
A method of preliminarily pressing a bent assembly comprising a pair of bent glass sheets and a flexible interlayer comprising a first heating step performed without vacuum, a biasing step, an unbiasing step and followed by a second heating step performed simultaneously with an application of vacuum. When the assembly so prepressed is further laminated under heat and pressure, it develops fewer bubbles after a heat stability test involving exposure to high temperature for an extended period than assemblies further laminated under such heat and pressure conditions after a prepressing step that includes passing the assembly between rollers prior to the further lamination step.