B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/521
B29C 49/00 (2006.01) B29C 53/10 (2006.01) B65H 47/00 (2006.01)
Patent
CA 1256256
ABSTRACT Flattening and take-off apparatus for processing a plastic film web made by blowmolding by means of a stationary film-blowing head, which plastic film web is to be supplied to a stationary winder comprises flattening means and pinch rolls for acting on the plastic film web being received. The flattening means and pinch rolls are preferably mounted in a frame, which is mounted for rotation through as much as 360° about the axis of the initially tubular film web. The apparatus preferably also comprises turning rods and deflecting rollers, which are pivoted on said axis and are arranged in parallel planes in such a manner that during the operation of the apparatus the film web moves from the pinch rolls to the first deflecting roller and is delivered from the last turning rod to the stationary winder. The apparatus also comprises a knife, which is mounted in the frame and succeeds the pinch rolls in the direction of travel of the film web and serves to slit one ply of the tubular film web, and an unfolding device, from which the unfolded film web moves to a deflecting roller. The unfolding device comprises an inclined isosceles unfolding triangle or inclined bars, which constitute a wedge-shaped structure and extend symmetrically with respect to the center line that passes through the nip between the pinch rolls. Said unfolding device is provided at its vertex with a sliding edge, which slides on the film web adjacent to one fold line thereof. The unfolding device is provided with adjusting means for changing its elevation and its angle of inclination and the distance of the sliding edge from the fold line. The frame is provided with a knife for slitting the film web at the opposite fold line.
510362
Peters Rudolf
Upmeier Hartmut
Marks & Clerk
Windmoller & Holscher
LandOfFree
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