Browse Prior Art Database

Transparent Support Structure

IP.com Disclosure Number: IPCOM000073548D
Original Publication Date: 1971-Jan-01
Included in the Prior Art Database: 2005-Feb-22
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Hildenbrandt, CW: AUTHOR [+3]

Abstract

A resilient transparent support structure for a magnetic recording medium insures sound head to medium contact while facilitating observation of the reverse side of the medium. The audio recording and playback machine 11 incorporates a sound head 13 which reciprocates under control of lead screw 15 in a back-and-forth direction 16 and transverses in a perpendicular direction 17 under control of a lead screw escapement rack (not shown). Magnetic medium 18 is inserted under support structure 19 and rests on guide rails 21. Head 13 is biased by spring 23 into intimate contact with medium 18.

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Transparent Support Structure

A resilient transparent support structure for a magnetic recording medium insures sound head to medium contact while facilitating observation of the reverse side of the medium. The audio recording and playback machine 11 incorporates a sound head 13 which reciprocates under control of lead screw 15 in a back-and-forth direction 16 and transverses in a perpendicular direction 17 under control of a lead screw escapement rack (not shown). Magnetic medium 18 is inserted under support structure 19 and rests on guide rails
21. Head 13 is biased by spring 23 into intimate contact with medium
18. Support structure 19 comprises laminar layers of a rigid transparent material such as glass, a soft transparent material such as low durometer silicone rubber cast onto the rigid layer and a thin transparent film having a low coefficient of friction such as MYLAR*.

The thin film layer and the soft material layer deflect as recording head 13 is biased into medium 18 thereby insuring good wrap-around contact between the head and medium. Visual information located on the nonrecorded side of medium 18 can be observed through transparent support structure 19. * Trademark of E. I. du Pont de Nemours & Co.

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