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:
Aug. 21, 2012
Filed:
Mar. 31, 2008
Applicants:
Makoto Iyoda, Osaka, JP;
Suguru Nakao, Hyogo, JP;
Shouichi Irie, Osaka, JP;
Inventors:
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29D 22/00 (2006.01); G02B 15/14 (2006.01); G03B 17/00 (2006.01); B22C 9/24 (2006.01); B29B 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An injection moldincludes a first portion, a second portion, a third portion, and a fourth portion. The first portionhas three high-density regions H in which there is the highest proportion of the axial direction dimension accounted for by the portion corresponding to cam grooves with respect to the axial direction dimension of a cavity. First gatesare disposed at locations corresponding to the high-density regions H, or closer to the high-density regions H than second gates. The average channel sectional area of first runnersis larger than the average channel sectional area of second runners