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Constant Fly Height Constant Stiffness Variable Width Air Bearing

IP.com Disclosure Number: IPCOM000085415D
Original Publication Date: 1976-Apr-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Stevenson, PA: AUTHOR

Abstract

Described is a design approach for an air bearing wherein uniformity of fly height and stiffness is maintained.

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Constant Fly Height Constant Stiffness Variable Width Air Bearing

Described is a design approach for an air bearing wherein uniformity of fly height and stiffness is maintained.

Fig. 1 depicts an unwrapped configuration of a helically scanned tape unit. As is shown, the shape of the air bearing due to the helical wrap and the spilt mandrel configuration is triangular. Fig. 2 depicts an air bearing wherein the fly height and stiffness of the bearing is maintained constant when the bearing is designed to conform to the following equation: d/2/W over L(h) = Constant.

The bearing will have a constant fly height and a constant stiffness (change in fly height per change in tape tension). In the equation: d = Hole diameter.

W = 1/2 air bearing width.

L(h) = Spacing between holes.

Of course, the fly height and stiffness also depends on the respective values chosen for Beta and d/2/W/L(h) along x, because W is a function of x.

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