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:
Mar. 24, 1992
Filed:
Jul. 11, 1988
James W Hendry, Brooksville, FL (US);
Milad Limited Partnership, Naples, FL (US);
Abstract
A process for injection molding hollow plastic articles includes the steps of sequentially injecting fluent plastic and gas into a mold cavity. A quantity of fluent plastic is initially injected to substantially fill the mold cavity. A charge of pressurized gas is then injected into the mold cavity to displace a portion of the still fluent plastic into a spill cavity flow coupled to the mold cavity. The article may be formed with an internal wall by introducing first and second gas charges into the mold cavity at separate entry points. In one embodiment, the first and second charges are introduced substantially simultaneously. In a second embodiment, the charges are introduced sequentially. After the hollow plastic article has solidified, the gas is vented.