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:
Jul. 18, 1978
Filed:
May. 14, 1976
Applicant:
Inventor:
Gaylord William Brown, Beaverton, MI (US);
Assignee:
Sweetheart Plastic, Inc., Beaverton, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
425394 ; 425384 ; 425397 ;
Abstract
Sheet supporting apparatus for a continuous sheet, differential pressure thermoforming machine comprising laterally spaced apart sheet support members for supporting the lateral edges of a formable sheet and for moving the sheet in a forward path of travel. The apparatus includes an open top, air receiving, sheet support box disposed interjacent the laterally spaced sheet support members upstream of a differential pressure mold, and mechanism for introducing air under pressure to the inside of the box for supporting a midportion of the sheet of plastic.