G - Physics – 11 – B
Patent
G - Physics
11
B
242/32.2
G11B 15/00 (2006.01) B65H 57/14 (2006.01) G11B 15/295 (2006.01) G11B 15/43 (2006.01) G11B 15/60 (2006.01)
Patent
CA 1096838
PHN 8890 16.6.78 ABSTRACT In a closed loop magnetic tape drive arrange- ment the magnetic tape is returned from a supply reel via a capstan along a plurality of magnetic heads, and other components which frictionally cooperate with the magnetic tape, to the capstan and subsequently wound onto a take-up reel, two pressure rollers pressing the magnetic tape against the capstan at substantially op- posite sides, so that the magnetic heads are located in a closed loop of the magnetic tape. Apart from the ten- sion in the part of the magnetic tape upstream from the closed loop being maintained constant as far as possible by suitable means in a conventional manner, a compensa- tion means is used for the compensation of variations of the tension of the magnetic tape in the loop as the result of variations in the coefficients of friction of the magnetic heads owing to variations in tempera- ture and humidity, which compensation means consist of means which frictionally cooperate with the mag netic tape upstream from the closed loop, whose coef- ficient of friction and angle of contact have been se- lected in accordance with a specific relationship. - 22 -
311347
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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