Patent ID: 7100864
Filing Date: 2006-09-05
Classification: B65H

Abstract:
1. A turning bar usable to guide a web of material comprising: a jacket; a plurality of holes on at least a portion of a circumference of said jacket; an interior chamber adapted to receive compressed air and to direct the compressed air to said jacket circumference through said plurality of holes; at least one movable piston, said at least one movable piston being movable in a longitudinal direction along a longitudinal axis of said turning bar and being movable in a circumferential direction of said jacket, said at least one movable piston being usable to block selected ones of said plurality of holes; a frame supporting said turning bar for pivotable movement through 90° about an axis of rotation extending transversely to said longitudinal axis of said turning bar; and a gear mechanism for coupling said movement of said piston in said circumferential direction of said jacket to said pivotal movement of said turning bar, said gear mechanism converting said 90° pivot movement of said turning bar into 180° rotation of said piston in said circumferential direction of said jacket.