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:
Feb. 27, 1990
Filed:
Oct. 30, 1984
Applicant:
Inventors:
Robert W Foreman, Bloomfield Hills, MI (US);
Michael T Ives, Romulus, MI (US);
Assignee:
Park Chemical Company, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C / ; B29C / ;
U.S. Cl.
CPC ...
264 25 ; 106 389 ; 264 37 ; 264221 ; 264317 ; 264D / ;
Abstract
A process for pressure molding an article around a hardened salt mold core made from a mixture of relatively low melting temperature salt and sand wherein the core is removed from the finished article by immersion of the article containing the core into a molten bath mixture of the core material thereby to melt the core out of the article, recover the core material, and thus replenish the bath for use in making additional cores. The bath is originally constituted by melting a suitable quantity of a dry premix of the salt and sand.