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:
Feb. 01, 1977
Filed:
Oct. 03, 1975
Applicant:
Inventor:
Soren Elof Sollerud, Norrkoping, SW;
Assignee:
Tetra Pak Developpement SA, Lausanne, CH;
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29D / ; B29D / ;
U.S. Cl.
CPC ...
425500 ; 425501 ; 425508 ; 425520 ;
Abstract
Two parts of foam plastics are connected together by heating a portion of the first part so that it will melt, while the corresponding portion of the second part is kept at a considerably lower temperature, preferably room or ambient temperature. After the heating of the first portion the parts are immediately brought together, whereby a surface layer of the second part rapidly melts, whereupon the second part serves as a heat dissipating means to provide a rapid hardening of the molten portions. After the two parts have been put together, a pressure applying means can be pressed against the joint formed between the parts.