B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
B65B 61/00 (2006.01) B65B 11/02 (2006.01)
Patent
CA 2334462
A wrapping apparatus, in which the supporting elements (4) supporting a film roll (5) are mounted on the frame (3) of a film dispenser (1) with bearings permitting free rotation so that the film roll supported by them is freely rotatable. The pre-stretching rollers (6, 7) are mutually engaged via a transmission and are likewise mounted on the frame with bearings permitting free rotation. A pendulum roller (9) comprised in the film dispenser and the spring force of a spring (10) applying a load on it have been so adapted that the pendulum roller (9) forms between the second pre-stretching roller (7) and the deflecting roller (11) a bend that functions as a film supply containing a varying amount of film, depending on the prevailing draw of the film to keep the drawing velocity and tension of the film substantially constant at the pre-stretching rollers regardless of the variation in the draw and velocity of the film that is caused by the shape of the article being wrapped.
Finlayson & Singlehurst
Oy M. Haloila Ab
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