Browse Prior Art Database

Magneto Optic Device

IP.com Disclosure Number: IPCOM000093399D
Original Publication Date: 1967-Sep-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Brock, GW: AUTHOR [+2]

Abstract

This apparatus is useful for readout of information from systems using Kerr or Faraday magneto-optic effects. In order to minimize wear between the readout transducer and recording media, while at the same time maximizing signal output, it is desirable to bring the transducer and recording media into rapid contact. Such action is effected under even pressure with no relative movement between the media and the transducer, while at the same time the formation of an air film between the two surfaces is avoided.

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Magneto Optic Device

This apparatus is useful for readout of information from systems using Kerr or Faraday magneto-optic effects. In order to minimize wear between the readout transducer and recording media, while at the same time maximizing signal output, it is desirable to bring the transducer and recording media into rapid contact. Such action is effected under even pressure with no relative movement between the media and the transducer, while at the same time the formation of an air film between the two surfaces is avoided.

This apparatus achieves these desired results. Support 1, including cavity 2, is connected by openings 3 to a vacuum-blower source not shown. Cavity 2 is completely covered by flexible impermeable membrane 4. Transducer mounting 5 consists of tubing 6, connected to a vacuum-blower source, and transducer 7 including either a Kerr surface or a surface consisting of a Faraday material.

In operation, flexible information bearing magnetic recording media 8 is positioned between support 1 and mounting 5. Blowing pressure is then introduced in support 1 while suction is applied through tubes 6. This results in the lifting of recording media 8 into vertical contact with transducer 7, due to the expansion of membrane 4. Suction through tubes 6 aids in both lifting the recording media and removing air from between transducer 7 and media 8. There is, thus, no relative horizontal motion between transducer 7 and media 8. When the latter is properly po...