B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
242/30, 242/57.1
B65H 75/00 (2006.01) B65H 19/22 (2006.01) B65H 19/28 (2006.01)
Patent
CA 2039521
FMC Corporation Munich, 4.4.1990 F11635 Bd/wu ABSTRACT An apparatus for rolling up web material, particularly bags consisting of plastics films and connected together in strip form, wherein the web material can be wound on a plurality of winding mandrels in a winding station in such a manner that a winding mandrel in a waiting position (waiting winding mandrels is disposed adjacent to the web material being supplied, in front of a winding mandrel (take-up mandrel) in a winding position, and after the web material has been severed transversely in front of the winding position, the beginning of the length of web following on the point of separation is supplied to the waiting winding mandrel, while, as a result of lifting the beginning in relation to the spaced apart end of the length of web running on ahead and blowing compressed air under the raised beginning, the latter is brought up to the rotating waiting winding mandrel and is entrained by this until, after a minimum package thickness has been reach on the waiting winding mandrel this is transferred into the winding position and another empty winding mandrel is transferred into the waiting position, whereupon the full package on the winding mandrel is lifted from the winding mandrel by blowing compressed air out of radial nozzles provided in the winding - 16 - mandrels, and is withdrawn from the winding mandrel. An adjustable reduced pressure can be connected to the waiting winding mandrel in such a manner that at the time when the beginning of the length of web following on the point of separation is lifted, this beginning is pressed against the surface of the waiting winding mandrel by means of the radial nozzles for the purpose of entrainment, while as a result of the adjustment of the height of the reduced pressure, the friction between the surface of the waiting winding mandrel and the beginning of the length of web increases steadily until there is entrainment.
de Bin Rene F.
Lambrecht Emiel
Fmc Corporation
Sim & Mcburney
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