Arrangement for shutting off the drive for a supply roll

Details Arrangement for shutting off the drive for a supply roll Arrangement for shutting off the drive for a supply roll

1976-12-22

1978-09-05

Drummond, Douglas J.

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

Means joining flexible indefinite length or endless bodies...

242 581, B65H 1908, B65H 1918

Patent

active

041117417

ABSTRACT:
A web is being pulled off a supply roll nearing exhaustion. As the supply roll becomes exhausted, the web being pulled off is severed, and the trailing end of the severed web is glued to the periphery of a fresh web supply roll. Before the severing and gluing operation occurs, the peripheral speed of the fresh web supply roll must be brought up to coincidence with the travel speed of the web being pulled. An accelerator roller driven by a motor rolls upon the fresh supply roll, accelerating it up to speed. When the fresh roll reaches the predetermined speed, the severing and gluing unit is enabled for subsequent synchronized activation. The acceleration of the fresh roll is monitored indirectly by a transducer coupled to the accelerator roller. When the desired speed is reached, a time delay is allowed to elapse before the motor is shut off, causing the desired speed to be exceeded. As the fresh roll then decelerates it again reaches this speed. This second reaching of the desired speed during deceleration is detected, and the detection causes the severing and gluing unit to be enabled for subsequent activation.

REFERENCES:
patent: 2029046 (1936-01-01), Wood
patent: 3015454 (1962-01-01), Flannery
patent: 3391877 (1968-07-01), Angell et al.
patent: 3516617 (1970-06-01), Haner et al.

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