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. 26, 2003
Filed:
Nov. 06, 2001
Applicant:
Inventors:
James S. W. Lee, Long Island, NY (US);
Chiu-Keung Kwan, Kowloon, HK;
Assignee:
C.J. Associates, Ltd., Kowloon, HK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 4/544 ;
U.S. Cl.
CPC ...
B29C 4/544 ;
Abstract
A method of injection molding a part having two undercut regions using a two-part mold. A combined pin-in-a-sleeve extends into the cavity in each of the mold parts in order to form a bore in a part to be molded in that cavity. Each pin provides a portion shaped to form an undercut region in the bore. The pins abut each other. After an injection molded part is made, the mold opens a limited and discrete distance to allow the molded part to be released from the hold of the mold cavity. Then, the mold opens fully for the continuation of a multi-step operation to pull the pins out of the undercut regions.