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:
Jul. 14, 1992
Filed:
Aug. 16, 1989
Applicant:
Inventors:
Masahito Umetsu, Atsugi, JP;
Shigeharu Yokomichi, Isehara, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23H / ;
U.S. Cl.
CPC ...
249 6912 ; 148139 ;
Abstract
In a wire discharge machine, threading of the wire is accomplished by tensioning the wire to straighten same and applying an electric current thereto to facilitate separation thereof. Clamps hold and help tension the wire by securing one or more ends at a particular location. The tensioning is accomplished with drive motors, which may be or include pulse motors.