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:
Jan. 04, 1983
Filed:
May. 29, 1980
Applicant:
Inventors:
James L Valimont, Cheswick, PA (US);
George W Shoop, Seminole, FL (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B32B / ; C03C / ;
U.S. Cl.
CPC ...
156104 ; 156105 ; 156106 ; 156107 ; 156286 ; 1563082 ; 1563084 ; 156382 ; 156497 ; 1565831 ;
Abstract
A laminate assembly having rigid sheets about a thermoplastic interlayer has interfacial surfaces evacuated and peripheral edges sealed by applying localized vacuum and heat to only the periphery and marginal edge portions. A flexible heating blanket having marginally embedded heating elements overlies the laminate assembly and is biased theretoward by a flexible channel-shaped ring. The channel-shaped ring establishes a conduit about the periphery of the laminate assembly which is evacuated to remove entrapped air, and the heating element is energized to bond and seal the marginal edge portions of the assembly.