Browse Prior Art Database

Reel To Reel Tape Transport

IP.com Disclosure Number: IPCOM000077107D
Original Publication Date: 1972-Jun-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Beach, LR: AUTHOR [+2]

Abstract

By velocity modulating tension in a reel-to-reel tape transport, the abrasion of the tape against a transducer at low velocities is minimized. It has been found that this approach substantially reduces head wear adding to the longevity and reliability of a reel-to-reel tape transport.

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Reel To Reel Tape Transport

By velocity modulating tension in a reel-to-reel tape transport, the abrasion of the tape against a transducer at low velocities is minimized. It has been found that this approach substantially reduces head wear adding to the longevity and reliability of a reel-to-reel tape transport.

Tape 10 is selectively bidirectionally transported between reels 11 and 12 through transducing station 13. Motors 14 and 15, respectively, drive reels 11 and 12. Tachometers 16 and 17 indicate rotational velocities. Tension on tape 10 between the reels is sensed by transducers located in the reel supports, as at 18 and 19.

The control system illustrated above the drive mechanism is switched between forward and reverse directions of tape transport. As shown, the forward direction is transporting tape from reel 12 to reel 11, while the reverse is from reel 11 to reel 12. Take-up reel 11 is velocity controlled, while pay-out reel 12 is tension controlled with the velocity signal from tachometer 16 modulating tension control of reel 12. Tachometer 16 supplies reel 11 velocity signal through switch 20 to signal processor 21 having transfer function f(v). The modified velocity signal is supplied through summer 22 to modify tension servo 23 operation in accordance with velocity. Tension servo supplies its controlling signal over line 24 through switch 2S to tape pay-out motor 15. Summer 22 also receives tension set point signal over line 26, and tension signal from sensor 19 associated with reel...