Apparatus for obtaining differential tangential variable speeds

Advancing material of indeterminate length – By orbitally traveling material-engaging surface – With control or adjustment means

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226189, 226191, B65H 2002

Patent

active

050003640

ABSTRACT:
The invention relates to a drawing device. This device is designed such that the differential tangential speeds V are variable at different points of a deformable flat film (1) or plate that moves along at least one drawing roller (3) rotating about an axis XX, said film (1) or plate moving in a direction perpendicular to the axis of rotation of the roller and resting on a generatrix G.sub.N of the roller. The roller (3) has a rotational speed N which is constant with time, while the distance G.sub.N C.sub.1 from the supporting generatrix G.sub.N of the film to the axis C.sub.1 of rotation of the roller is variable with time. The invention is applicable to the drawing of plastic films.

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