SHEET STACKER AND METHOD FOR FORMING STACKS OF SHEETS

摘要

A sheet stacker including a sheet conveyor arrangement and a stacking bay, wherein sheets delivered by the sheet conveyor arrangement are formed into stacks; the stacking bay including a stacker platform. The stacker platform is provided with a vertical lifting and lowering movement with respect to a stationary supporting structure and is controlled to move downwards while a stack of sheets is formed thereon. The stacker platform supports a stack conveyor configured and controlled to perform at least an evacuation motion, to remove a completed stack from the stacking bay. The evacuation motion of the stack conveyor is oriented such that a completed stack is moved from the stacking bay onto an evacuation conveyor arranged under the sheet conveyor arrangement.

主权项

1. A sheet stacker comprising:
a sheet conveyor arrangement, configured for feeding a plurality of sheets in succession in a sheet feeding direction, said sheet conveyor arrangement having a sheet discharge end; a stacking bay, wherein sheets delivered by the sheet conveyor arrangement at the sheet discharge end thereof are formed into stacks; the stacking bay comprising a stacker platform, and wherein the stacker platform is provided with a vertical lifting and lowering movement with respect to a stationary supporting structure and is controlled to move downwards while a stack of sheets is formed thereon;wherein the stacker platform supports a stack conveyor movable in a direction parallel to a feed direction of the sheets in the stacking bay, configured and controlled to perform at least an evacuation motion, to remove a completed stack from the stacking bay; and the evacuation motion of said stack conveyor is oriented such that a completed stack is moved from the stacking bay onto an evacuation conveyor arranged under the sheet conveyor arrangement.