Variable ratio winder

Details Variable ratio winder Variable ratio winder

1978-01-06

1979-07-03

McCarthy, Edward J.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

B65H 5938

Patent

active

041598083

ABSTRACT:
A web winder of the center wind type drives the web roll through a controllable variable speed mechanical transmission whose input shaft is turned by a variable slip torque modulating device whose torque coupling varies in accordance with the output of a web tension sensor upstream from the web roll to immediately change the angular velocity of the roll to compensate for sudden tension upsets in the web. The amount of slip in that device is detected and compared with a selected reference slip to develop an error signal for controlling the gear-in ratio of the transmission which slows the angular velocity of the roll to compensate for the gradual web tension increase caused by increasing roll size. Thus the winder's speed characteristics are matched at the input of the transmission to the clutch characteristics at all roll diameters so that the winder requires only a minimum size torque modulating device for given web speed and tension conditions.

REFERENCES:
patent: 3365143 (1968-01-01), Espel
patent: 3441825 (1969-04-01), Dinger
patent: 3595495 (1971-07-01), Cloeren
patent: 3650490 (1972-03-01), Saunders

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