Web tension control device

Details Web tension control device Web tension control device

1975-03-05

1976-08-17

Schacher, Richard A.

Advancing material of indeterminate length

With material-responsive control means

To regulate longitudinal movement of material

226 44, 242 7542, 242 7553, B65H 2504

Patent

active

039749487

ABSTRACT:
In a web processing machine wherein a continuous web is fed over idler rollers so as to form a web loop at which the web passes over a sensing roller mounted on rod members for pivotal movement toward and away from the idler rollers, a web tension control means includes a brake device controlled by movement of the sensing roller for maintaining a predetermined tension in the web, a pair of piston and cylinder units connected between the rod members and the machine, the chambers between these units on opposite sides of the pistons thereof being so interconnected with each other and with a fluid pressure supply line as to render the dampening effect of the units dependent on a particular position of the sensing roller.

REFERENCES:
patent: 2472548 (1949-06-01), Schnell
patent: 3083887 (1963-04-01), Huck
patent: 3701493 (1972-10-01), Welsch
patent: 3782653 (1974-01-01), Jones

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