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:
Sep. 15, 1998
Filed:
Mar. 26, 1997
Applicant:
Inventors:
Minoru Ujita, Saitama, JP;
Takafumi Kakiuchi, Chiba, JP;
Masahiro Otsuka, Aichi, JP;
Takayuki Nakamura, Tokyo, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21C / ; B65H / ;
U.S. Cl.
CPC ...
242445 ; 2424445 ; 2424471 ;
Abstract
A winding apparatus for positioning a leading end of a film layer with high precision. The film is loaded at a position away from a winding position for winding the film around a bobbin and the leading end of the film is brought into contact with the bobbin by using a retainer. At the same time, to control the length of the film to be wound to improve reproducibility of the shape of a transformer, a drag chuck is provided, and the drag chuck is controlled through a servo control.