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. 29, 1976
Filed:
Dec. 26, 1974
James B Elliott, Hacienda Heights, CA (US);
Poly-Optics, Inc., Santa Ana, CA (US);
Abstract
Mold halves are formed from thin, flexibly stiff, rigid polyvinyl chloride film having a thickness of 0.010 .+-. 0.003 inch and which is deformed to conform to opposite surface contours of a structure to be produced. The mold halves mate along a parting line to define a mold chamber in the shape of the desired structure and are formed with an access opening to the chamber, marginal regions coextensive about the chamber from the parting line, and conjugate protuberances on the marginal regions. The film is thin and pliable enough for pins to be inserted cross-wise through the protuberances to secure together the mold halves, yet thick and rigid enough to support casting material poured therein and flexible enough to be peeled from the partially set product.