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:
Sep. 05, 1989
Filed:
Nov. 10, 1983
Applicant:
Inventor:
Peter P Hoj, Espergarde, DK;
Assignee:
Tetra Pak Developpement SA, Pully, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264562 ; 264566 ; 2641 / ; 2642896 ; 425 66 ; 425 71 ; 4253261 ;
Abstract
A method for the molecular orientation of plastic material by expanding a tube of plastic material, includes introducing the tube into a container filled with heated liquid, preferably water of a temperature of 70.degree.-100.degree. C. The tube is expanded by introducing a pressurized liquid into the tube. An apparatus for carrying out the method and a plastic material are also disclosed.