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:
Nov. 09, 2004
Filed:
Apr. 23, 2002
Yukihisa Takeuchi, Nishikamo-gun, JP;
Hiroyuki Tsuji, Nagoya, JP;
Kazumasa Kitamura, Itinomiya, JP;
Yoshinori Yamaguchi, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
In a method for removing punched fragments in a workpiece formed using a punch and a die, the workpiece, which is tightly attached to a stripper, is lifted without extracting the punch from the perforations formed in the workpiece, subsequently pushing back the punch lifted from the die so as to make it protrude slightly from the bottommost end of the perforations, and performing an operation for removing punched fragments in that condition. The method for removing punched fragments can easily be performed even if only a very narrow space is available in a counterbore of a die, and can ensure that no punched fragments remain inside the perforations, and therefore can improve yield of a product being fabricated. A method for producing an article by punching inclusive of the method for removing the punched fragments is also disclosed herein.