Apparatus for controlling tape tension

Details Apparatus for controlling tape tension Apparatus for controlling tape tension

1993-10-18

1997-05-06

Darling, John P.

Winding, tensioning, or guiding

Unwinding and rewinding a machine convertible information...

Carrier speed or tension control

2423521, G11B 1546

Patent

active

056263040

ABSTRACT:
When a reference tape tension is changed progressively from a current tape tension to a target tape tension, a tape tension can be made to approach the reference tape tension rapidly and reliably regardless of the magnitude of the difference between the current tape tension and the target tape tension. A tape servo apparatus detects a current tape tension, compares the detected current tape tension with the reference tape tension and regulates the tape tension in response to the comparison between the detected current tape tension and the reference tape tension while the reference tape tension is gradually changed from the current tape tension to the target tape tension, preferably, in a step-wise fashion. The current tape tension is thereby corrected so the system maintains the desired tape tension.

REFERENCES:
patent: 4786992 (1988-11-01), Tajima
patent: 4807107 (1989-02-01), Fincher
patent: 4977466 (1990-12-01), Nakata
patent: 5032936 (1991-07-01), Fujioka et al.
patent: 5039027 (1991-08-01), Yanagihara et al.
patent: 5150263 (1992-09-01), Sakamoto et al.
patent: 5277378 (1994-01-01), Ebisawa
patent: 5310133 (1994-05-01), Falk et al.
patent: 5327304 (1994-07-01), Owada et al.

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