System for positioning stacks of sheets in sheet feeders - has automated control utilising position of front corner edges relative to reference points

摘要

The device includes a supply device (26) by means of which the stack (6) supplied to the lift table (5) can be brought into a predetermined zero starting position on same. The stack and lift table are brought to a predetermined working height where the sheets are removed from the stack with further rhythmic lifting of the lift table. Through positioning means the position of the corner edges between the side face of the sheet stack near the further processing machine and the side faces perpendicular thereto, and relative to each reference point. It is detected and in dependence on this the lift table is swivelled with the stack supported by same about a swivel axis perpendicular to the lift table so that the side face near the further processing machine occupies a position perpendicular to the sheet conveyor direction of the further processing machine. ADVANTAGE - For positioning stacks of sheets applied to a sheet feeder with a lift mechanism and lift table. Is easier less strenuous working by the personnel.