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. 18, 2002
Filed:
Jul. 06, 2001
Francis M. Schloss, Perrysburg, OH (US);
Plastic Technologies, Inc., Holland, OH (US);
Abstract
A heat set blow molding process comprises providing a plastic preform, thermally conditioning the preform to achieve a temperature profile across the wall of the preform wherein the inner surface of the preform is at a higher temperature than the outer surface of the preform, said temperature profile being within the molecular orientation temperature range of the plastic, heating the outer surface of the preform to increase the temperature of the outer surface of the preform by at least about 10° C., enclosing the preform in a hot mold, expanding the preform to form a container within the hot mold by introducing a blowing gas into the preform to induce biaxial orientation in the preform and force the preform into conforming contact with the hot mold, and maintaining the expanded preform in conforming contact with the hot mold for a time sufficient to induce crystallization of the plastic material and to allow for stress relaxation.