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. 13, 1999
Filed:
Jul. 23, 1997
Applicant:
Inventor:
Takanobu Kohno, Tokyo, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65H / ; G11B / ; G11B / ;
U.S. Cl.
CPC ...
2423343 ; 2423344 ; 2423345 ; 2424132 ; 360 71 ;
Abstract
A tape tension control apparatus for controlling a tension of a tape extended between a pair of reels including a current servo system for adjusting a current of a reel motor in accordance with a diameter of a tape roll wound on a reel, a speed servo system for adjusting a current of the motor so that the rotational speed of the motor exceeds a predetermined value corresponding to the roll diameter, and a changeover device for selecting between said servo systems. The changeover device selects the speed servo system upon activation of the apparatus, after which it selects the current servo system when the current to the motor exceeds a predetermined value.