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:
Jan. 02, 1996
Filed:
Dec. 07, 1994
Applicant:
Inventor:
Randall K Julian, Evansville, IN (US);
Assignee:
Sunbeam Plastics Corporation, Evansville, IN (US);
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29C / ; B29C / ;
U.S. Cl.
CPC ...
2643287 ; 264320 ; 425555 ; 425420 ; 425812 ;
Abstract
Reverse gating is added to a conventional compression molding machine so that when the molding cavity is filled with material in excess of the amount required to mold a part, the material flows from the cavity to a pressure chamber to be vented. Pressure in the chamber allows back flow of the material from the chamber to the molding cavity during cooling to compensate for shrinkage.