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Improving Signal Output in Recording Media

IP.com Disclosure Number: IPCOM000077411D
Original Publication Date: 1972-Jul-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Bologna, AJ: AUTHOR [+3]

Abstract

Signal output of flexible magnetic media is improved by controlled abrasive treatment of the magnetic portion of the media. The device shown performs this function. It consists of supply reel 10 and take-up reel 12. Magnetic media 14 is fed from supply reel 10 and into controlled reciprocating contact with abrasive media 16 by drive capstans 18 and 20. Reciprocal motion of magnetic media 14 is aided and buffered by vacuum columns 22 and 24, with entry in and out of the columns assisted by idlers 26, 28, 30, and 32. Abrasive media 16, in the form of a flexible loop, is urged into contact with the media by idler 34, the loop being moved by drive roller 36. Abrasive media 16 may be, for example, 0.5 micron chromium oxide or other fine abrasive.

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Improving Signal Output in Recording Media

Signal output of flexible magnetic media is improved by controlled abrasive treatment of the magnetic portion of the media. The device shown performs this function. It consists of supply reel 10 and take-up reel 12. Magnetic media 14 is fed from supply reel 10 and into controlled reciprocating contact with abrasive media 16 by drive capstans 18 and 20. Reciprocal motion of magnetic media 14 is aided and buffered by vacuum columns 22 and 24, with entry in and out of the columns assisted by idlers 26, 28, 30, and 32. Abrasive media 16, in the form of a flexible loop, is urged into contact with the media by idler 34, the loop being moved by drive roller 36. Abrasive media 16 may be, for example, 0.5 micron chromium oxide or other fine abrasive.

In operation, magnetic media 14 is reciprocated forward and backward at high speed, for example, 112 ips, between supply reel 10 and take-up reel 12. The net motion of the media is away from the supply reel and toward the take-up reel. While the magnetic media is undergoing this advancing reciprocating motion, the abrasive media is moved slowly, for example, 1 ipm, in a direction opposite to the net advancing motion of the magnetic media.

Magnetic media treated in this manner exhibits improved signal output, with high frequency signal output being preferentially improved.

In another embodiment, reciprocal motion of the magnetic media may be eliminated and it may instead be abrasively...