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:
Oct. 01, 1991
Filed:
Dec. 06, 1989
Yasumasa Matsukura, Kashihara, JP;
Takatori Corporation, Nara, JP;
Takatori Hitech Co., Ltd., Nara, JP;
Abstract
A wire saw has a wire wound a number of turns around a plurality of multigrooved rollers to form rows of the wire between the rollers which cut a workpiece. By reversibly rotating the multigrooved rollers, the wire is moved gradually from a wire feeding side to wire recovery side of the saw while undergoing a reciprocating motion between the multigrooved rollers. In addition, the multigrooved rollers are rotated around a fixed axis to swing the wire in a manner that provides contact with the workpiece which is quite close to point contact. Thus, a concentrated load is applied to the workpiece fully utilizing the permissible tension on the wire, and thus accelerating the cutting speed and raising the cutting accuracy. Moreover, movable-pulley type double-speed mechanisms disposed at the wire feeding side and at the recovery side, respectively, are driven by an endless rope moving synchronously and along a corresponding locus with the wire, to absorb tension and slack alternately generated at the wire feeding side and recovery side.