Device for positioning sheets in a machine station
AssigneeBobst SA
InventorFabio Bettinelli
Life of this patent
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Abstract
A device for positioning sheets in a station of a sheet-processing machine comprising a movable bearing surface for holding at least one edge zone of a sheet, actuators driving the bearing surface in the plane thereof, sheet grippers accompanying the motion of the bearing surface and adapted to grip or release the edge zone of the sheet between sheet grippers and the bearing surface. The sheet grippers are connected to the bearing surface by at least one joint comprising a number of levers forming a parallelogram articulated around horizontal pivot axes. A piston comprising a permanently compressed spring eliminates the radial clearance between the pivot axes. Lateral clearance thereof is eliminated by a spring strip which is rigid in the transverse direction.
Claims10
A device for positioning sheets in a station of a sheet-processing machine, comprising a movable bearing surface located in a plane, the bearing surface being for holding at least an edge zone of a sheet, an actuator moving the bearing surface in the plane thereof, a gripper device accompanying the bearing surface in the movement and the gripper device being adapted to grip or release the edge zone of the sheet between the gripper device and the bearing surface, at least one joint connecting the sheet gripper device to the bearing surface, the joint comprising a number of levers, the levers forming an articulated parallelogram around horizontal axes at respective pivots.
Dependencies are inferred from the claim text.