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. 05, 1979
Filed:
Oct. 11, 1977
Applicant:
Inventor:
George Ferber, Sterling Heights, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
521133 ; 422131 ; 422133 ; 422135 ; 521917 ;
Abstract
In a preferred embodiment, minute bubbles of a suitable gas are rapidly entrained in a liquid chemical constituent of a reaction injection molding system (e.g., polyurethane) to reduce the viscosity of the constituent and the density of parts molded therefrom. A small portion of the constituent is continuously withdrawn from and returned to a main holding tank via a recirculation line wherein minute gas bubbles are dispersed from a microporous stone into the flowing portion of the constituent. The recirculating and gas entraining processes are continued until a predetermined quantity of the gas is dispersed in the molding constituent.