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.

Date of Patent:
Feb. 20, 2001

Filed:

Mar. 03, 2000
Applicant:
Inventors:

Masayuki Seki, Kanagawa, JP;

Masami Iwamoto, Kanagawa, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 2/800 ;
U.S. Cl.
CPC ...
B21D 2/800 ;
Abstract

There provides a tool, which is capable of smoothly executing a cutting and protruding process in all the steps from the starting to ending of cutting and protruding of a small protrusion when the protrusion is cut and protruded on an upper surface of a workpiece. In a protrusion forming tool for forming a protrusion,on a surface of a workpiece by cooperation of a punch,and a die,the punch,has a cylindrical punch guide,and a punch driver,having a punch head,at its upper end is provided to an upper portion of the punch guide,so as to be movable up and down and so that a force is applied to the punch driver,and an elastic member,is provided between an up/down slider,which is provided in a position below the punch driver,in the punch guide,movably up and down, and the punch driver,and a cutting and protruding blade,C for cutting and protruding a protrusion on a surface of a workpiece is provided at a lower end of a punch body,which is provided in a position below the up/down slider,in the punch guide,and an upper surface of the punch body,is brought into surface-contact with an inclined surface,A on a lower surface of the up/down slider


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