Apparatus for controlling a web

Details Apparatus for controlling a web Apparatus for controlling a web

1988-10-17

1991-11-26

Stodola, Daniel P.

Advancing material of indeterminate length

With material-responsive control means

To position material laterally

026099, 226021, B65H 2302

Patent

active

050676466

ABSTRACT:
Apparatus for controlling the lateral position of a web moving along a path of travel across a scroll roll or other roll capable of imparting lateral movement to the web. The apparatus includes sensors to detect lateral position of the web and elements, preferably conical brushes, which are movable into and out of contact with the web to cause the roll when in contact to move the web in a corrective lateral direction. A mechanism is employed for imparting movement to the web contacting elements which will achieve impact of the elements against the web at a velocity approaching zero. Further, the web contacting element is adapted for pivotal movement away from the web upon contact with the web, thus permitting webs of differing thickness across a normal thickness range to be controlled without additional adjustment to the apparatus.

REFERENCES:
patent: 2753591 (1956-07-01), Stevens et al.
patent: 4068789 (1978-01-01), Young, Jr. et al.
patent: 4420108 (1983-12-01), Kallman
patent: 4578845 (1986-04-01), Young, Jr.

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