Device for correcting the lateral position of a sheet
AssigneeBobst SA
InventorGeorges Polic
Life of this patent
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Abstract
A device for a pick-up unit for an infeed station of a processing machine which includes a carriage mounted in a main frame for shifting both laterally and vertically. The carriage is provided with a bar carrying several suction cups and is shifted laterally by a rack gear on the carriage being engaged by a pinion from a drive motor which rotates in response to the sensed lateral position of the sheet being lifted. The device is preferably used for centering sheets being picked up from a stack or pile of sheets within a feed station of a machine designed for converting or processing these sheets.
Claims7
A device constructed for correcting a lateral position of a sheet-shaped piece taken from the top of a pile of sheet-shaped pieces by a pick-up unit within a machine infeed station, said pick-up unit being arranged within a fixed frame and including means for lifting the piece from the pile, as well as conveying means for carrying the piece into the machine after it is released by the lifting means, said device including a carriage being mounted in the frame for both lateral and vertical movement and having the lifting means permanently secured to the carriage, a first sensing means for determining the lateral position of the piece, second sensing means for determining the lateral position of the carriage in the frame, means for vertically shifting the carriage in accordance with a machine operating cycle, means for laterally shifting the carriage in response to indications originating from the first sensing means during upward movement of the carriage and for shifting the carriage in response to the second sensing means during a downward movement of the carriage.
Dependencies are inferred from the claim text.