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:
Jun. 01, 1976
Filed:
Sep. 21, 1973
Applicant:
Inventors:
Anguel Tonchev Balevski, Sofia, BG;
Ivan Dimov Nikolov, Sofia, BG;
Asparuh Mihailov Antonov, Sofia, BG;
Stefan Georgiev Semerdjiev, Sofia, BG;
Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ; B29F / ;
U.S. Cl.
CPC ...
264 37 ; 264 455 ; 264328 ; 264329 ; 264D / ; 264D / ; 425244 ; 428322 ; 428409 ;
Abstract
A method of and apparatus for the molding of foamed thermoplastic bodies with integral skins wherein, for each mold operation after the first, a portion of previously foamed material produced by expansion in the mold cavity, is temporarily accumulated behind a body of unfoamed thermoplastic and the foamed and unfoamed material are then forced into the mold cavity and permitted to expand therein.