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Magnetic Tape Cleaner

IP.com Disclosure Number: IPCOM000097575D
Original Publication Date: 1961-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Badum, PJ: AUTHOR

Abstract

To clean magnetic tape before it reaches a magnetic head which writes on and reads from the tape, a sharp edge is used to remove loose foreign particles which accumulate on the tape.

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Magnetic Tape Cleaner

To clean magnetic tape before it reaches a magnetic head which writes on and reads from the tape, a sharp edge is used to remove loose foreign particles which accumulate on the tape.

The center drawing illustrates a magnetic tape cleaner structure having a pair of sharp edge cleaners attached to each side of a magnetic head. This cleaner makes use of the principles of air-film lubrication to use only one cleaner at a time and thereby remove the drag and wear on the tape that would be introduced by two cleaners in contact with the tape at all times.

When the tape is moving from left to right, it traps air in the area indicated by angle B to the left of the left cleaner. This angle is designed, according to known air lubrication principles, to be too large to cause an air film clearance between the left cleaner edge and the tape. Therefore, the dust is removed from the tape before reaching the head. However, the angle of approach A between the tape and the right cleaner is small enough to trap air and lift the tape to produce an air film clearance between the tape and the right cleaner.

Conversely, if the tape moves from right to left, the right cleaner cleans and the left one air lubricates.

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