Apparatus for diverting stacks of sheets in paper processing machines

Details

Inventors: Besemann, Alfred;
Assignee: E. C. H. Will GmbH & Co. (Hamburg, DE)
Primary Examiner:
Assistant Examiner:
Attorney, Agent or Firm:

A first transporting unit advances a series of stacks of paper sheets along a straight first path. A transfer conveyor can be lifted into the first path to divert selected stacks into the range of a second transporting unit which defines a second path making an oblique angle with the first path. The transfer conveyor is assisted by a pusher which is adjacent to the first path opposite the stack-receiving end of the second transporting unit and is movable at right angles to the first path to move the diverted stack sideways. Such stack strikes a yieldable bumper which expels it from the second path into the range of a third transporting unit serving to advance stacks in parallelism with or at right angles to the direction of movement of stacks along the first path. The orientation of selected stacks remains unchanged during diversion from the first into the second path as well as during diversion from the second into the third path.

DETAILED DESCRIPTION I claim: 1.
Apparatus for manipulating stacks of paper sheets or the like, comprising a first transporting unit arranged to advance a succession of stacks in a first direction, at a predetermined level and along a first path; a second transporting unit arranged to advance selected stacks of said succession along a second path and in a second direction at an oblique angle to said first direction, said second transporting unit having a stack-receiving portion adjacent to one side of said first path; a transfer conveyor normally disposed below said level and operable to advance selected stacks from said first path, in said second direction and onto the stack-receiving portion of said second transporting unit; means for raising and lowering said transfer conveyor above and below said level so that, when raised, said transfer conveyor extends into said first path and transfers the oncoming selected stack into said second path; a pusher adjacent to the other side of said first path opposite the stack-receiving portion of said second transporting unit; means for moving said pusher transversely of said first path so that said pusher assists said transfer conveyor in delivering selected stacks to the stack-receiving portion of said second transporting unit and preserves the orientation of selected stacks during such transfer; and a yieldable bumper disposed at said one side of said first path and arranged to deflect transferred stacks from said second path.
2.
The apparatus of claim 1, wherein said first transporting unit comprises a plurality of elongated belt conveyors having stack-engaging upper reaches disposed at said level.
3.
The apparatus of claim 1, wherein said pusher is movable at right angles to said first direction.
4.
The apparatus of claim 1, wherein said second transporting unit comprises a plurality of endless belt conveyors having stack-engaging upper reaches.
5.
The apparatus of claim 1, further comprising a third transporting unit arranged to receive deflected stacks from said second transporting unit

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