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:
Aug. 02, 1977
Filed:
Jun. 14, 1974
Applicant:
Inventors:
Georg E Ernstsson, Staffanstorp, SW;
Birger N Nilsson, Arlov, SW;
Herwig Pupp, Lund, SW;
Olof S Stark, Rydsgard, SW;
Assignee:
AB Ziristor, Lund, SW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29D / ; B29D / ;
U.S. Cl.
CPC ...
156 69 ; 156 85 ; 156218 ; 156229 ; 215 / ; 264 459 ; 2642 / ; 264230 ; 264289 ; 264321 ; 264D / ;
Abstract
A foamed plastic material of polyethylene or polystyrene capable of being heat-shaped for use in making packing containers wherein by stretching of the foam the cells therein are given a lenticular or elongated structure. In the case of a lenticular cell structure, produced by a bi-axial stretching operation, the individual cells are situated in layers in parallel planes. In the case of an elongated cell structure, produced by a mono-axial stretching operation, the individual cells are situated with their longitudinal axes in parallel planes.