Takeup reel positioning apparatus for tape threading in a tape d

Details Takeup reel positioning apparatus for tape threading in a tape d Takeup reel positioning apparatus for tape threading in a tape d

1990-08-24

1991-10-22

Stodola, Daniel P.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

242 57, 25023113, G11B 1532

Patent

active

050588222

ABSTRACT:
The takeup reel positioning apparatus for the tape threading operation in a magnetic tape drive functions to precisely locate the takeup reel slot at the end of the tape threading path in order to enable the tape threading arm to load the leader block therein. This precise positioning is accomplished by the use of a disk that is fixedly attached to the takeup reel motor shaft. An interrupter is provided whose beam transverses the disk in the region of an annular ring thereon thereby indicating the presence of a transparent or opaque portion thereof. A selected boundary between the opaque and transparent portions of the annular ring is in the path of the beam of the interrupter at precisely the same time that the takeup reel slot is positioned at the end of the tape threading path. The interrupter is used to cause the takeup reel motor to oscillate around this predetermined position to automatically compensate for any mispositioning caused by inaccuracies in the appartus.

REFERENCES:
patent: 4091426 (1978-05-01), Umeda
patent: 4343024 (1982-08-01), Kawai
patent: 4577811 (1986-03-01), Bray et al.
patent: 4742406 (1988-05-01), Turuda
patent: 4776528 (1988-10-01), West
patent: 4852825 (1989-08-01), McGee, et al.

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