Browse Prior Art Database

Elimination of Transverse Tape Vibration in a Magnetic Tape Unit

IP.com Disclosure Number: IPCOM000078499D
Original Publication Date: 1973-Jan-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Frauenfelder, LS: AUTHOR [+3]

Abstract

An air bearing is used in this high-performance (high tape speed and high rates of tape acceleration/deceleration) magnetic tape unit to eliminate transverse vibration of the magnetic tape, as it runs in a straight line between the read/write head and the adjacent capstan and tape-path air bearing.

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Elimination of Transverse Tape Vibration in a Magnetic Tape Unit

An air bearing is used in this high-performance (high tape speed and high rates of tape acceleration/deceleration) magnetic tape unit to eliminate transverse vibration of the magnetic tape, as it runs in a straight line between the read/write head and the adjacent capstan and tape-path air bearing.

This magnetic tape unit includes a file reel 1, holding one-half inch wide magnetic tape 14. This tape passes through a tape path including vacuum columns 2, 3, 4 and 5, hydrostatic air bearings 6, 7, 8, 9 and 10, capstan 11 and read/write head 12, as the tape moves in a forward direction to be wound onto machine reel 13.

As shown in Fig. 2, tape 14 would tend to run in a straight line between capstan 11 and tape-path air bearing 8. Head 12 is placed to deflect the tape from this straight line, to thereby produce a wrap of tape about the head's transducing surface. The natural frequency of tape sections 15 and 16, which run in a straight line between the head and capstan 11 and air bearing 8, respectively, is determined by the length of the tape section, the mass of the tape section and the tension therein. As the start/stop repetition rate of capstan 11 approaches this natural frequency, a transverse node of vibration can be set up in tape sections 15. This vibration adversely affects the transducing ability of head 12.

This undesirable tape vibration is eliminated by forcing a node point in tape section...