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:
Oct. 18, 1983
Filed:
Dec. 29, 1980
Applicant:
Inventors:
Werner Festag, Schaffhausen, CH;
Hans-Ueli Muller, Schaffhausen, CH;
Assignee:
Swiss Aluminium Ltd., Chippis, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72 60 ; 72350 ;
Abstract
The invention concerns a process and device for the manufacture of blisters with high barrier properties using metal-plastic composite foils which can be deep drawn, in particular an aluminum-plastic composite foil which is clamped firmly in the clamping facility of a device for manufacturing blisters. The process is such that the composite foil is pre-stretched in a first step and then shaped into a blister in a second step.