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Recording Over Tape Loop Splices

IP.com Disclosure Number: IPCOM000092970D
Original Publication Date: 1967-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Cronquist, DH: AUTHOR

Abstract

This technique provides continuous recording in a tape loop containing a splice while avoiding high noise levels in the region of the splice.

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Recording Over Tape Loop Splices

This technique provides continuous recording in a tape loop containing a splice while avoiding high noise levels in the region of the splice.

Heads 12 and 14 simultaneously record identical tracks 16 and 18 on magnetic tape loop 10 in which splice 20 runs obliquely across. Under splice 20 and holding it together is strip 22 of light-reflective tape. The width of strip 22, measured parallel to tracks 16 and 18, is somewhat greater than the track length that is affected by splice 20. Heads 10 and 12 are spaced longitudinally at least the width of strip 22. Photosensor 24 is positioned to detect strip 22 when head 14 starts to read noisy signals. Head 14 is normally used for reading. A switching to head 12 occurs during the interval when photosensor 24 senses strip 22 or a bit longer. Such assures that head 14 is inactive for more than the disturbed length of track. The data read by heads 12 and 14 is added to provide the system output.

Splice 20 can be of a shape other than oblique. The width of strip 22 need be only great enough to provide a mechanical joint.

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