Web tensioning device for automatic cross-machine tensioning of

Details Web tensioning device for automatic cross-machine tensioning of Web tensioning device for automatic cross-machine tensioning of

1994-05-16

1995-05-30

Stodola, Daniel P.

Winding, tensioning, or guiding

Tension control or brake

Supply controlled

226 21, 226 24, B65H 2302

Patent

active

054195098

ABSTRACT:
A web tensioning control device includes a cylindrical roller that automatically adjusts its orientation in order to equalize the tension across a moving web. Each end of the cylindrical roller is supported by a pneumatic spring. A conduit connects the two pneumatic springs so that pressurized air can shift between the springs in response to changes in the tension across the moving web. Thus, the cylindrical roller is allowed to pivot about an axis perpendicular to its roll axle so that the tension at each point across the moving web is substantially equal after encountering the roller.

REFERENCES:
patent: 2940752 (1960-06-01), Deeker
patent: 2989265 (1961-06-01), Selsted
patent: 3380637 (1968-04-01), Knapp
patent: 3424397 (1969-01-01), Kennedy
patent: 3583615 (1971-06-01), Ott, Jr.
patent: 5074450 (1991-12-01), Lindner et al.

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