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:
Jan. 11, 1994
Filed:
Feb. 07, 1992
Takahisa Hara, Kawanishi, JP;
Masahito Matsumoto, Ibaraki, JP;
Hiromu Fujita, Ashiya, JP;
Yuji Kamiji, Yokkaichi, JP;
Hiromasa Nakatsuka, Mie, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Nissen Chemitec Corporation, Ehime, JP;
Abstract
A hollow molded article is produced by supplying a molten resin between a pair of a fixed mold and a movable mold before the fixed mold and the movable mold are closed, inserting at least one gas-supplying pin which is provided on a surface of the fixed mold to form a hollow part in a part of the resin and supplying pressurized gas through said gas-supplying pin before the mold closing is finished, closing the movable mold to fill the resin in a cavity formed by the molds, slightly opening the molds while pressurizing a gas in the resin to expand the hollow part and opening the movable mold to remove a hollow molded article from the molds.