Advancing material of indeterminate length – With material-responsive control means – To regulate longitudinal movement of material
Patent
1989-10-03
1991-03-05
Stodola, Daniel P.
Advancing material of indeterminate length
With material-responsive control means
To regulate longitudinal movement of material
226 25, 242 7551, B65H 2504, B65H 2318
Patent
active
049971204
ABSTRACT:
The tension on a tape web is controlled with a lock mechanism in an apparatus wherein a first dancer device, a pair of engaging-disengaging rolls, a second dancer device, and a pair of nip rolls are located in this order from the upstream side to the downstream side in the direction along which the tape web moves. The speed at which the engaging-disengaging rolls rotate is adjusted on the basis of the vertical position of a dancer roll of the first dancer device, and the speed at which the nip rolls rotate is adjusted on the basis of the vertical position of a dancer roll of the second dancer device, whereby the tension on the tape web is adjusted. A method for controlling the tension with a lock mechanism comprises the steps of locking the position of the dancer roll of the first dancer device at a predetermined position when the engaging-disengaging rolls disengage from each other, and releasing the dancer roll of the first dancer device from its locked position when the engaging-disengaging rolls engage with each other.
REFERENCES:
patent: 3905533 (1975-09-01), Corse
patent: 4359178 (1982-11-01), Hagashi et al.
patent: 4708301 (1987-11-01), Kataoku
patent: 4848630 (1989-07-01), Niestrath et al.
Suzuki Kiyohito
Tanaka Hiroaki
Bowen Paul
Fuji Photo Film Co. , Ltd.
Stodola Daniel P.
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