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.:

US 6981303 B1

PDF
Full Text
Expired
Date of Patent:
Jan. 03, 2006

Filed:

Jul. 23, 2002
Applicants:

Yasuhiro Nakao, Sayama, JP;

Hiroto Shoji, Sayama, JP;

Kunitoshi Sugaya, Sayama, JP;

Takashi Kato, Sayama, JP;

Takaharu Echigo, Sayama, JP;

Satoshi Matsuura, Sayama, JP;

Inventors:

Yasuhiro Nakao, Sayama, JP;

Hiroto Shoji, Sayama, JP;

Kunitoshi Sugaya, Sayama, JP;

Takashi Kato, Sayama, JP;

Takaharu Echigo, Sayama, JP;

Satoshi Matsuura, Sayama, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23P 17/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A method of feeding a blank () by cutting a billet () for plastic working includes the steps of superimposing a plurality of annular members (to) having a coefficient of linear expansion smaller than that of the billet and an inside diameter slightly greater than the outside diameter of the billet on one another to assemble a tubular jig (), inserting the billet into the assembled jig, heating the billet and the jig to a temperature at which the billet is half-molten, and cutting the billet into at least one blank by moving the annular members adjacent to one another in opposite directions. The cutting of the billet does not need a cutting tool, thus causing no wear of blades, and thereby allowing reduction in production cost. The billet can be cut into a plurality of pieces at a time, increasing productivity. Since the blanks can be fed together with the annular members, there is no need to reheat the blanks, providing increased productivity.


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