Browse Prior Art Database

Flexible Media Wear Tester

IP.com Disclosure Number: IPCOM000076291D
Original Publication Date: 1972-Feb-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 21K

Publishing Venue

IBM

Related People

Brock, GW: AUTHOR [+4]

Abstract

Shown is a flexible material wear test apparatus. A flexible material sample loop 10, such as magnetic tape, is driven against a moving abrasive tape loop 12 to accelerate and quantitatively measure the wear of the sample.

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Flexible Media Wear Tester

Shown is a flexible material wear test apparatus. A flexible material sample loop 10, such as magnetic tape, is driven against a moving abrasive tape loop 12 to accelerate and quantitatively measure the wear of the sample.

When used in testing magnetic media, for example, a measured loop of media sample 10 is threaded coated side out between media drive capstan 14 and idler 15, and around idlers 16 and 18, with the remainder of the loop falling into vacuum column 19. The media is driven, for example, in a counterclockwise direction and maintained at an approximate tension and speed to simulate a tape drive.

Abrasive tape 12 is coated with a composition of fine grain abrasive, such as micro-aluminum oxide, for example. It is driven abrasive side out by capstan 17 around idlers 20 and 22 in, for example, a clockwise motion at a slow speed relative to the speed of media loop 10. Because of the slow motion of the abrasive away from the sample, buildup of sample debris is eliminated, and the abrasive constantly presents a clean surface to the sample.

The parameter used in measuring wear is a weight loss of the loop sample, after a given number of passes while in contact with the abrasive. A counter (not shown) monitors the number of passes made by a reflective marker on the sample and can be used to automatically stop the test after a predetermined number of passes. The test is reproducible and has been shown to correlate to the long term co...