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:
Aug. 30, 1994
Filed:
Nov. 06, 1992
Atsushi Inoue, Chigasaki, JP;
Nobuyuki Kaku, Kanagawa, JP;
Takashi Sasaki, Yokohama, JP;
Yasuyuki Niguchi, Katsuta, JP;
Yasuo Inagaki, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A tape loading device is for a cassette type magnetic recording/reproducing apparatus in which a tape is drawn out of a cassette for record or reproduction, and includes movable tape guides for defining a path for running of the tape, a pair of reel driving motors which independently drive two reels of the cassette to apply a back tension to the tape, and a control unit. The reel driving motors are activated to apply the same torque to both the reels, before the tape loading operation. In this state, a tape wind diameter ratio and/or an inertia ratio between the reels is computed based on the speeds and directions of rotations of the reels. The control unit selects a control pattern which would effectively suppress rotations of the reels due to inertia, out of a plurality of control patterns, in accordance with the computed value. In tape loading or unloading operation, the control unit controls operation of the movable tape guides and/or the reel driving motors in accordance with the selected pattern. Thus, any undesirable effect of inertia of the cassette reels is avoided, so that tape is loaded or unloaded in a short time without suffering from damage.