Patent ID: 6279894
Filing Date: 2001-08-28
Classification: B65H

Abstract:
Device for separating stacked flat bag pieces (21) provided with socalled side folds (22), comprisinga supporting structure, which is pivot-mounted in a frame and is provided with a drive, and on which rollers (11, 16), provided with a row of suction elements (15, 18) at equal angular distances, are mounted so as to rotate on a cylindrical enveloping surface, which is concentric with respect to the supporting structure's axis of rotation, said rollers being driven in a direction of rotation opposite to the supporting structure's direction of rotation,comprising a stacking cassette (20), which is positioned in such a manner at the enveloping cylinder, described by the rows of suction elements (15, 19), that each roller's row of suction elements pulls the first bag piece (21) from the cassette, andcomprising a conveyor (8), which is positioned at the enveloping cylinder, accepts the individual bag pieces and transports them away,characterized inthat the stacking cassette (20) holds bag pieces (21) exhibiting cut edges, which face outwardly in the direction of the axis of rotation and are provided with socalled offset cuts (23) andthat the stacking cassette (20) and/or the suction elements (15, 18) are arranged in such a manner and/or the suction elements are controlled in such a manner that an outer suction element (15') of each row of suction elements sucks in each bag piece (21) at one end of the layer of the offset cut that overlaps the layer facing the suction element; and the other suction elements (15, 18) engage with the edge of the bag piece (21) that is provided with a side fold at an interval in time relative to the first suction element (15').