Tape reel position sensor

Details Tape reel position sensor Tape reel position sensor

1985-02-28

1986-03-25

Christian, Leonard D.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

226 91, 242 718, G03B 104, G11B 1532

Patent

active

045778116

ABSTRACT:
Apparatus and methods are disclosed for properly positioning the machine reel in a magnetic tape drive containing an automatic tape threading mechanism, wherein the file reel consists of a tape cartridge with tape attached to a leader block. The automatic threading mechanism connects to the leader block and pulls the tape through the tape path to insert the leader block into the hub of the machine reel. However, before the leader block can be inserted into the machine reel hub, the machine reel must be properly aligned to receive the leader block. The present invention provides apparatus and methods for properly aligning the machine reel to receive the tape leader block. The disclosure also provides a means to detect when the last wrap of tape is being removed from the machine reel hub during an unload operation and stop the machine reel at the proper angular location so that the tape leader block can be removed from the hub without damage to the hub or the leader block.

REFERENCES:
patent: 3744736 (1973-07-01), Kruhn
patent: 3758009 (1973-09-01), Magahiro et al.
patent: 3792491 (1974-02-01), Inaga
patent: 3797776 (1974-03-01), Umeda et al.
patent: 3912205 (1975-10-01), Koyama
patent: 4243186 (1981-01-01), Peter et al.
patent: 4334656 (1982-06-01), Crawford et al.
patent: 4399936 (1983-08-01), Rueger
patent: 4426047 (1984-01-01), Richard et al.

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