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:
Feb. 03, 1998
Filed:
Oct. 23, 1992
Yukihiko Tsujino, Kanagawa, JP;
Hiromi Hoshino, Kanagawa, JP;
Yoshiaki Haba, Kanagawa, JP;
Yasuo Nagai, Kanagawa, JP;
Hiroshi Saito, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A tape tension controlling circuit which eliminates a complicated controlling operation and is produced at a very low cost. A supply side tape tension regulator is provided on the supply reel side while a take-up side tape tension regulator is provided on the take-up reel side with reference to a rotary drum, and displacements of the regulators corresponding to tension values of the magnetic tape are fed back to reel controlling systems for the supply reel and the take-up reel so that the tape tension on the supply reel side and the tape tension on the take-up reel side are individually kept constant. When the magnetic tape is to be fed in a pinch-off condition wherein a pinch roller is spaced away from the magnetic tape, a take-up side tension error signal is inhibited from being supplied.