Advancing material of indeterminate length – By orbitally traveling material-engaging surface – With control or adjustment means
Patent
1975-06-30
1977-02-08
Cherry, Johnny D.
Advancing material of indeterminate length
By orbitally traveling material-engaging surface
With control or adjustment means
192 12BA, 192 26, 226188, 242 5519A, B65H 1722
Patent
active
040068536
ABSTRACT:
A fast forward drive for a cartridge tape player comprises upper and lower crescents which increase the effective capstan diameter in the fast forward mode. At normal playing speed the crescents index with respect to a received tape cartridge such that the capstan's surface forcibly engages the cartridge's pressure roller.
When the fast forward mode is desired a clutch couples the upper crescent to the capstan for rotation therewith. Rotational drive of the upper crescent is coupled to the lower crescent, at a predetermined phasing relationship, through a pin and trough arrangement, whereby fast forward is effected. On return to the normal play speed the upper crescent is fixedly indexed, resulting in a decreased lower crescent rotational drive and thus an increased chance of improper lower crescent alignment.
To promote lower crescent indexing the improvement contemplates a second spring clutch mounted on the capstan between the lower crescent and the housing which actively drives the lower crescent to its indexed position. In this manner a positive force operates on the lower crescent for proper indexing.
REFERENCES:
patent: 3233806 (1966-02-01), Shirai
patent: 3850357 (1974-11-01), Lace
Cherry Johnny D.
Gillman James W.
Hamley James P.
Lisa Donald J.
Motorola Inc.
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