Apparatus and method for controlling web speed

Details Apparatus and method for controlling web speed Apparatus and method for controlling web speed

1997-07-28

1998-09-29

Bonck, Rodney H.

Advancing material of indeterminate length

Processes

Intermittently or interruptedly

226 44, 226 45, B65H 2000, B23Q 1500

Patent

active

058135863

ABSTRACT:
There is provided an apparatus for controlling the infeed speed of a bag making machine. In one embodiment, the nip roll speed is changed from a variable speed to a fixed speed after a cycle interrupt occurs. Once a dancer arm returns to an upward position, the nip roll speed changes back to the variable speed. In another embodiment, the nip roll speed is approximately equal to an average line speed and the dancer is trimmed to correct the speed of the nip rolls. There is also disclosed a method for controlling the infeed speed.

REFERENCES:
patent: 4702731 (1987-10-01), Lambrecht et al.
patent: 4798576 (1989-01-01), DeBin

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