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:
Feb. 14, 2006
Filed:
May. 09, 2002
Tatsumi Kawata, Kawasaki, JP;
Kazuo Nimura, Kawasaki, JP;
Kengo Kainuma, Kawasaki, JP;
Kunio Hibino, Hirakata, JP;
Hidenao Kataoka, Osaka, JP;
Tatsumi Kawata, Kawasaki, JP;
Kazuo Nimura, Kawasaki, JP;
Kengo Kainuma, Kawasaki, JP;
Kunio Hibino, Hirakata, JP;
Hidenao Kataoka, Osaka, JP;
Fuji Electric Co., Ltd., Kanagawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A press die and a molding process can form a disk member having a shaft shaped portion at a center with satisfactory circularity and flatness in a disk portion, dimensional precision in the shaft shaped portion, and concentricity between the disk portion and the shaft shaped portion at the center. The press die is designed for press molding of a glass substrate of a disk member with a shaft shaped portion at a center thereof. The press die includes an upper die forming an upper surface of the disk member, an intermediate die having a shaft forming hole portion for forming a shaft shaped portion projecting from a disk portion of the disk member, a lower die for forming a lower surface of the shaft shaped portion and a guide member for guiding the upper die, the intermediate die and the lower die.