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WIDE WEB AIR LEAKAGE CONTROL DEVICE FOR DIRECT RECORDING OF MAGNETIC IMAGES

IP.com Disclosure Number: IPCOM000025150D
Original Publication Date: 1983-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 81K

Publishing Venue

Xerox Disclosure Journal

Abstract

In a non-contact magnetic recording device 10, as shown in Figures 1 and 2, using a hydrodynamic air bearing to control the record head to recording tape spacing, a rotating disk 22, 2 inches wide or less, is centered between two larger stationary cylinders 12 and 14. Hydrostatic air bearings support the stationary cylinders on the rotating shaft 16 on which the disk is attached and is rotated thereby. Hydrostatic air bearings also support a recording tape 28 which surround a large portion of the cylinders and rotating disk surfaces. The rotating disk houses the record head (not shown) and provides a hydrodynamic air bearing to support that portion of the recording tape 28 that is above and around the disk 22. The thinner the disk, the smaller the air bearing spacing. An appropriate disk thickness and tape tension is chosen to obtain the desired spacing. A major concern is edge leakage spoiling the air bearing and making it unreliable when the rotatine, disk comes near the edge of the recording tape.

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XEROX DISCLOSURE JOURNAL

WIDE WEB AIR LEAKAGE CONTROL DEVICE FOR DIRECT RECORDING OF MAGNETIC IMAGES
Daniel F. Blossey

Proposed Classification
U.S. Class 360/55 Int. Cl. Gllb 5/02

J"

FIG. 2

443

Volume 8 Number 5 September/October 1983

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WIDE WEB AIR LEAKAGE CONTROL DEVICE FOR DIRECT RECORDING OF MAGNETIC IMAGES (Cont'd)

In a non-contact magnetic recording device 10, as shown in Figures 1 and 2, using a hydrodynamic air bearing to control the record head to recording tape spacing, a rotating disk 22, 2 inches wide or less, is centered between two larger stationary cylinders 12 and 14. Hydrostatic air bearings support the stationary cylinders on the rotating shaft 16 on which the disk is attached and is rotated thereby. Hydrostatic air bearings also support a recording tape 28 which surround a large portion of the cylinders and rotating disk surfaces. The rotating disk houses the record head (not shown) and provides a hydrodynamic air bearing to support that portion of the recording tape 28 that is above and around the disk 22. The thinner the disk, the smaller the air bearing spacing. An appropriate disk thickness and tape tension is chosen to obtain the desired spacing. A major concern is edge leakage spoiling the air bearing and making it unreliable when the rotatine, disk comes near the edge of the recording tape.

For practical design reasons, it is desirable to have a recording tape no wider tha...