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:
Jun. 12, 2007
Filed:
Nov. 14, 2003
Applicants:
Jun Nakano, Tokyo, JP;
Jun Shimizu, Miyagi, JP;
Ken Minemura, Saitama, JP;
Inventors:
Assignee:
Sony Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B29D 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
It is possible to obtain a disk substrate in which an edge of a center hole is free of flash. The disk substrate () in which the center hole () is provided with a straight portion () and a tapered portion (), and an edge on the side of a signal transfer surface () of the tapered portion () is provided with an R surface or C surface (), a mold apparatus optimum for molding the disk substrate (), and a disk taking-out apparatus.