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. 19, 2005
Filed:
Sep. 09, 1999
Yasuo Yamanaka, Yokohama, JP;
Jun Watanabe, Atsugi, JP;
Kiyotaka Sawada, Atsugi, JP;
Toshiharu Hatakeyama, Tokyo, JP;
Hidenobu Kishi, Yamato, JP;
Yasuo Yamanaka, Yokohama, JP;
Jun Watanabe, Atsugi, JP;
Kiyotaka Sawada, Atsugi, JP;
Toshiharu Hatakeyama, Tokyo, JP;
Hidenobu Kishi, Yamato, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A plastic molding having high accuracy includes at least one transfer surface and at least one imperfect transfer portion having a concave or convex shape. The mold assembly includes a cavity into which molten resin is injected, a slide cavity piece which is capable of being slid at a prescribed time so that a gap is formed between the resin and the slide cavity piece, and a vent hole for supplying a compressed gas in the cavity. A method of producing the plastic molding includes the steps of heating resin to provide a molten resin, injecting the molten resin into a cavity of a molding, applying a resin-pressure to the molten resin, cooling the resin, sliding the slide cavity piece, and opening the mold assembly.