Sheet braking method and device with downward deflection of sheet ends for shingling

摘要

PCT No. PCT/EP90/02143 Sec. 371 Date Jul. 30, 1991 Sec. 102(e) Date Jul. 30, 1991 PCT Filed Dec. 11, 1990 PCT Pub. No. WO91/08974 PCT Pub. Date Jun. 27, 1991.A method and apparatus for the stacking of paper engages the oncoming sheets at their rear ends between clamping elements on upper and lower belts and is so provided that the rear ends are deflected perpendicular to the direction of feed so that the oncoming sheets can effectively shingle over underlying sheets. The clamping portions are engaged at the feeding speed of the sheets at the moment of initial contact, are then slowed down to reduce the speed of the sheets, then release the sheets and then return to the usual speed for the pickup of the next sheet.