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:
Apr. 28, 1998
Filed:
Jan. 25, 1996
Hirokazu Yanagihara, Shizuoka, JP;
Masakazu Yamashita, Shizuoka, JP;
Koito Manufacturing Co., Ltd., Tokyo, JP;
Abstract
A method for molding a lamp body of vehicular lamps formed of synthetic resin which includes steps of forming a lamp body by synthetic resin which is provided with an air communication hole, a surrounding wall formed at a position where the air communication hole is surrounded thereby, and a cover member for covering a rear portion of the air communication hole, forming a recess on one surface of the surrounding wall to provide a thin hinge section to form the cover member integrally with the lamp body, bending down the cover member at the recess while facing outside to thereby define a communication passage connecting to the air communication hole cooperatively with the surrounding wall, providing a mold core for molding the cover member to extend in the core sliding direction, which mold core is constituted by a first block positioning at the side of the cover member where the recess is formed and a second block positioning at the opposite side thereof, retracting first, when the lamp body is retracted from the mold after the injection-molding process, the second block positioning at the side of the cover member where the recess is not formed, and then retracting the first block positioning at the side of the cover member where the recess is formed while bending the cover member at the hinge section.