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. 30, 2001
Filed:
Jan. 27, 2000
Applicant:
Inventors:
Shinji Nagatsuka, Mitaka, JP;
Shigeru Okubo, Mitaka, JP;
Hiroshi Kawarai, Mitaka, JP;
Hiroshi Oishi, Annaka, JP;
Keiichiro Asakawa, Annaka, JP;
Junichi Matsuzaki, Annaka, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B28D 1/08 ;
U.S. Cl.
CPC ...
B28D 1/08 ;
Abstract
A sensor measures a displacement of a sensor, and a control part of a wire saw calculates a sliding load in accordance with the measured displacement and an initial tension of the wire. Then, the control part compares the calculated cutting load with a preset reference value, and controls an ingot feed speed for a drive unit of a workpiece feed table in accordance with the results of the comparison.