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Browse Prior Art Database

Diskette Flatness and Pillowing Measuring Device

IP.com Disclosure Number: IPCOM000052604D
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 114K

Publishing Venue

IBM

Related People

Slindee, NE: AUTHOR

Abstract

The gage is designed to measure the deviation of a flexible file disket from the planar condition. Measurement of warp determines the "out-of-flat" relationship of the margins of the diskette jacket, and the determination of pillowing establishes the projection of the center of the diskette assembly from the normal planar relationship with respect to a flat supporting surface.

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Diskette Flatness and Pillowing Measuring Device

The gage is designed to measure the deviation of a flexible file disket from the planar condition. Measurement of warp determines the "out-of-flat" relationship of the margins of the diskette jacket, and the determination of pillowing establishes the projection of the center of the diskette assembly from the normal planar relationship with respect to a flat supporting surface.

The device includes two translators 10 and 11 (Fig. 1) which are secured to a common cross member 12 for unitary horizontal movement as the ball bushings 14 and 15 slide along rods 16 and 17 parallel to the upper surface 18 of base plate 19. Translators 10 and 11 each include a base 22 which is attached to cross member 12 and supports a micrometer 24. Each translator also includes a slide 25 which moves vertically with respect to the associated base 22 and is connected to and driven by the movable shaft portion of the micrometer 24 to accurately measure the relative motion. The slide 25 of the warp gage carries a blade 26 that presents spaced gage surfaces 27 that overlie the margins of a diskette placed on the base plate surface 18. The pillow gage translator slide 25 carries a blade 28 (Fig. 2) which presents a gage surface 30 that traverses over a central portion of the diskette.

The translator "zero" settings were established by using the average nominal dimensions of the diskette if perfectly flat. Blades 26 and 28 are set above the base...