Winding – tensioning – or guiding – Strand tensioning device – Tortuous course
Patent
1990-11-13
1993-11-09
Robertson, David L.
Winding, tensioning, or guiding
Strand tensioning device
Tortuous course
242186, 360 7309, 360 7314, G11B 15093, B65H 5938
Patent
active
052595633
ABSTRACT:
A magnetic recording/reproducing apparatus includes a guide roller which rotates as magnetic tape runs, and the running speed of the tape is detected on the basis of the rotation of the guide roller. The magnetic recording/reproducing apparatus further calculates a radius of a supply reel from the rotation of the guide roller and the rotation speed of the supply reel, calculates driving torque of the supply reel from the calculated result, and the supply reel is driven so that the tension of the magnetic tape is kept constant according to the calculated result.
REFERENCES:
patent: 4001552 (1977-01-01), Muller
patent: 4381089 (1983-04-01), Kondo
patent: 4497459 (1985-02-01), Yoshino et al.
patent: 4525654 (1985-06-01), Tajima et al.
patent: 4531166 (1985-07-01), Anderson
patent: 4739950 (1988-04-01), Goker et al.
patent: 4786992 (1988-11-01), Tajima et al.
patent: 5032938 (1991-07-01), Tajima et al.
patent: 5085379 (1992-02-01), Uchikoshi et al.
"Magnetic Tape Recording Technique" Denshi Gijutsu vol. 22, No. 9, Sep. 1972, pp. 60-66.
Asai Shigemi
Kakiwaki Shigeaki
Okuda Tohru
Tsuji Masaji
Conlin David G.
Neuner George W.
Robertson David L.
Sharp Kabushiki Kaisha
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