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Cleaning Solvent for Magnetic Recording Heads

IP.com Disclosure Number: IPCOM000092647D
Original Publication Date: 1967-Feb-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Cutts, RE: AUTHOR [+2]

Abstract

Magnetic recording heads used in recording and reading on organic binder type recording media, i.e., tapes, strips, and disks, build up deposits of the organic binder material after normal usage. These deposits interfere with the reading and recording of data and greatly increase the wear on the recording media. Thus, the recording heads must be cleaned periodically.

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Cleaning Solvent for Magnetic Recording Heads

Magnetic recording heads used in recording and reading on organic binder type recording media, i.e., tapes, strips, and disks, build up deposits of the organic binder material after normal usage. These deposits interfere with the reading and recording of data and greatly increase the wear on the recording media. Thus, the recording heads must be cleaned periodically.

The best solvents for the organic binder are ketones. These are not only flammable but have low flash points and cannot be used for safety reasons. If, however, the ketone such as acetone, is blended with a chlorofluoroethylene, such as FREON*, having a vapor pressure at or near the vapor pressure of the ketone and in such an amount that a blanket of FREON vapor forms over the exposed surface of the blend, the blend becomes noninflammable and yet retains its solvent capability for the organic binder.

An example of such a cleaning solvent is a mixture of one-third by volume of acetone with two-thirds by volume of a trichlorotrifluoroethane such as FREON TF. *Trademark of E. I. du Pont de Nemours and Co.

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