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. 05, 1985
Filed:
Dec. 19, 1983
Applicant:
Inventors:
Tadashi Yoshino, Osaka, JP;
Masayuki Mamei, Osaka, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G11B / ;
U.S. Cl.
CPC ...
242186 ; 242203 ; 318-7 ; 360 71 ;
Abstract
A tape drive control apparatus controls to set a tape speed to be constant in a fast forward or rewind mode (wherein a magnetic tape is driven by only reel motors without using a capstan) by using an output from rotation detectors for respectively detecting rotational frequencies of the supply and take-up reels, and to set a tape tension to be constant in a constant-speed mode (wherein the magnetic tape is driven by the capstan) by utilizing part of a tape velocity control system irrespective of the rotational frequency of the capstan.