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. 25, 1992
Filed:
Jul. 02, 1990
Applicant:
Inventors:
Kimio Yoshimura, Urawa, JP;
Satoshi Narumi, Tokyo, JP;
Assignee:
Tokyo Sheet Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264 455 ; 264 51 ; 264 53 ;
Abstract
In a method of preparing a urethane foam article having a high density outer surface layer, of the type wherein a plastic liquid containing isocyanates, polyols, a catalyst, a blowing agent, an assistant and other additives is poured into a mold through a one-shot molding process, a certain type of catalyst is added for causing the isocyanates and the blowing agent to create a difference in gas evolving reaction between an inner part and an outer part of the plastic liquid in the mold so as to form a high density layer on the outer surface of a urethane foam article.