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. 31, 1979
Filed:
Jun. 03, 1977
Applicant:
Inventor:
Arthur Vetter, Wolfertschwenden, DE;
Assignee:
Multivac Sepp Haggenmuller KG, Wolfertschwenden, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
425388 ; 264535 ;
Abstract
Plastics foil is shaped in a deep drawing apparatus by being placed in a mould, while the foil is below its deformation temperature, having heated wall surfaces and by applying a pressure differential to the foil so that it progressively stretches and contacts the mould wall. The progressive heating and stretching ensures that the corners of the moulded article are not thinner than the remaining portions of the moulded article, thus reducing the amount of plastics material necessary for an article of given strength.