Web tensioning apparatus

Details Web tensioning apparatus Web tensioning apparatus

1978-03-09

1980-01-08

Schacher, Richard A.

Advancing material of indeterminate length

By intermittent material-mover

With means to effect feed and retrograde movement

226195, B65H 1726

Patent

active

041824733

ABSTRACT:
A web-tensioning apparatus has stationary and movable clamps for clamping the opposite ends of a length of web, the movable clamp having a first spring for elastically forcing it in a direction towards the length and a second spring for elastically forcing it in a direction away from the length, the second spring providing greater spring force than the first spring plus the clamped length's initial resistance to stretching. If the web does stretch a little, the first spring relaxes so that the second spring can exert more force to move the movable clamp away from the stretched length.

REFERENCES:
patent: 2514554 (1950-07-01), Nowelsky
patent: 3110439 (1963-11-01), Drake

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