Patent ID: 6517472
Filing Date: 2003-02-11
Classification: B31B,B65H

Abstract:
A device for separating two material webs lying on top of each other while the material webs arm being transported on a conveying means, a first one of the two material webs being detachably fixed to the conveying means, the device comprisinga suction device movable with respect to a second one of the two material webs for temporarily sucking the second material web and separating it from the first material web; two cranks spaced apart from each other, each crank having a first rotatable joint for rotating the crank and a second rotatable joint to which the suction device is rotatably connected, one of the two cranks having a first engagement element formed thereon, the distance between the first rotatable joint and the second rotatable joint of each crank being substantially equal and the distance between the first rotatable joints of the two cranks being substantially equal to the distance between the second rotatable joints of the two cranks, so that the rotatable joints define the corners of a parallelogram; and a drive including: at least two wheels, at least one of which is driven; and a chain or belt encircling the at least two wheels, the chain or belt having a second engagement element displaceably engaging the first engagement element, the first and second engagement elements having respective orbit paths that do not coincide and are not parallel.