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Magnetic Erasing Template

IP.com Disclosure Number: IPCOM000098282D
Original Publication Date: 1960-Jul-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 65K

Publishing Venue

IBM

Related People

Cutaia, A: AUTHOR [+3]

Abstract

A template is provided to facilitate erasing magnetic flux from selected ones of a plurality of magnetic spots on a record so as to leave the remaining spots magnetized according to desired data.

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Magnetic Erasing Template

A template is provided to facilitate erasing magnetic flux from selected ones of a plurality of magnetic spots on a record so as to leave the remaining spots magnetized according to desired data.

A record 10 has magnetic spots 11, 12 recorded on it. A magnetic shield 13 has embossed protrusions 14 that guide flux from the north pole N of a magnet 15, through a magnetizable frame 16 and then through those spots 11 adjacent protrusions 14 to the south pole S. Thus, the selected spots are demagnetized while leaving unselected spots 12 magnetized.

The magnet 15 is slidable on channels 17 to sweep across the entire shield
13.

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