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:
May. 08, 1990
Filed:
Apr. 28, 1988
Kunio Yamazaki, Takatsuki, JP;
Tetsuzi Watanabe, Toyonaka, JP;
Cinpres Limited, Staffordshire, GB;
Abstract
A resin moulding is produced by introducing molten synthetic thermoplastic resin into a mould cavity, sufficient to fill completely the mould cavity. Subsequently, during the cooling of the resin, pressurized gas is introduced into the resin within the mould cavity. The resin moulding cools and hardens in the mould cavity while the gas is maintained under pressure. The mould cavity is designed to manufacture mouldings with unevenly distributed thick walled sections connected to at least one gate for the introduction of the pressurized gas, which flows only within the resin forming the thick walled sections and immediately adjacent areas of the moulding thereby taking up the shrinkage in the resin.