Apparatus for the stacking of sheets

摘要

An apparatus for the stacking of sheets, with a stacking band conveyor, which for both-sided action on a series of scalelike staggered sheets has conveyor belts with conveying surfaces facing each other defining a conveying track therebetween, the latter beginning at its entrance having at least one bend about an axis parallel to the axes of rotation of the conveyor belts and having an exit directed substantially downwardly from above, with a substantially horizontal support on which the exit of the stacking band conveyor is directed and on which the scalelike staggered sheets are pushed together in the staggering succession into a stack with sheets standing substantially vertically on their edges, and with a feeder which feeds the sheets to the entrance of the stacking band conveyor. The bend at the entrance of the stacking band conveyor is convex viewed from above, so that the lagging edge of each sheet fed from the feeder to the entrance to the stacking band conveyor lifts from the feeder. The stacking band conveyor is driveable with a conveying speed which is so much smaller than the feeding speed of the feeder that the lifted lagging edge of a preceeding sheet is run under by the sheet lagging at a distance on the feeder. A sensor switches off the stacking band conveyor when a following sheet does not run under the lifted lagging edge of the sheet which was picked up by the stacking band conveyor.