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:
Mar. 31, 1998
Filed:
Jun. 24, 1996
Applicant:
Inventors:
Pieter Willem Provo Kluit, The Hague, NL;
Adriaan Beukers, Heemstede, NL;
Assignee:
Tsutsunaka Plastic Industry Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29C / ;
U.S. Cl.
CPC ...
264 53 ; 264 453 ; 264344 ;
Abstract
The present invention is directed to a method of making a foamable film of at least one thermoplastic resin with at least one liquid blowing agent incorporated therein, said method comprising forming the thermoplastic resin and a liquid swelling agent for the thermoplastic resin into a layer, contacting the said layer with the liquid blowing agent and replacing at least part of the swelling agent in the resin by the liquid blowing agent.