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:
Jul. 31, 1979
Filed:
Oct. 14, 1977
Donald G Sauer, Harwinton, CT (US);
National Can Corporation, Chicago, IL (US);
Abstract
There is disclosed a thermoforming process and apparatus or machine including a male mold assembly and a pressure box or a female mold assembly disposed on support members or platens maintained in fixed relationship to each other whereby the pressure box assembly is first caused to pass through the plane of the heated plastic material whereafter the male mold then is caused to move into the pressure box together with the simultaneous introduction of controlled amounts of a pressurized fluid until complete interrelationship is attained with relative movement of the male mold to the pressure box being continued to a point proximate the plane of heated thermoplastic material as more clearly hereinafter discussed.