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:
Sep. 28, 1993
Filed:
Jul. 27, 1992
William B Cushman, Pensacola, FL (US);
Other;
Abstract
An injection molding method and apparatus is disclosed that enables the injection of molding material into molds that may contain fibers, long, oriented fibers, core inserts and/or surface inserts. The method utilizes these steps: first, evacuation of the mold and its contents with the use of a vacuum means to remove gasses, adsorbed and chemisorbed water and other substances, second, injection of material into the mold using an injection pump or atmospheric pressure to force molding material into the mold. Apparatus for the preferred embodiment includes the placement of molds and any mold contents in a vacuum chamber to eliminate a dependence on seals around the mold, and means for injection of molding material under vacuum.