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:
Jan. 29, 2008
Filed:
Jan. 27, 2004
Koji Ohashi, Aichi-ken, JP;
Takayoshi Mori, Toyohashi, JP;
Michio Yamada, Shinshiro, JP;
Koji Ooi, Toyokawa, JP;
Hisashi Yasumatsu, Toyokawa, JP;
Toshio Naiki, Toyokawa, JP;
Hiromu Nakamura, Toyokawa, JP;
Koji Ohashi, Aichi-ken, JP;
Takayoshi Mori, Toyohashi, JP;
Michio Yamada, Shinshiro, JP;
Koji Ooi, Toyokawa, JP;
Hisashi Yasumatsu, Toyokawa, JP;
Toshio Naiki, Toyokawa, JP;
Hiromu Nakamura, Toyokawa, JP;
Konica Minolta Business Technologies, Inc., Tokyo, JP;
Abstract
A drawing method for forming a reflective curved surface by pressing a metal plate fitted in a fixed die with a movable die. The fixed die is composed of a lower die and a core, and the movable die is composed of an upper die and a presser. During the drawing, the metal plate is pressed to have a compressed border portion between a non-pressed portion and a curved surface pressed portion. It is the most desirable to compress the border portion to have a thickness which is 70% of the thickness of the metal plate before drawing.