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US 2001/0040334 A1Published application
Device for positioning sheets in a machine station
AssigneeBobst SA
InventorFabio Bettinelli
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AssigneeBobst SA
InventorFabio Bettinelli
Estimating the term…
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, gripping means accompanying the motion of the bearing surface and adapted to grip or release the edge zone of the sheet between a sheet-gripping means (16) and the bearing surface. The sheet-gripping means (16) is connected to the bearing surface by at least one joint comprising a number of levers (10, 18) forming a parallelogram articulated around horizontal pivot axes (11, 13, 17, 19). A piston (24) 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.
A device for positioning sheets in a station of a sheet-processing machine, comprising a movable bearing surface (1) for holding at least an edge zone of a said sheet, actuating means (3, 4, 5) moving the bearing surface in the plane thereof, gripping means accompanying the bearing surface in the said movement and adapted to grip or release the said edge zone of a sheet between a sheet-gripping means (15, 16) and the bearing surface, characterised in that the said sheet-gripping means is connected to the bearing surface by at least one joint comprising a number of levers (10, 18) forming an articulated parallelogram around horizontal pivot axes (11, 13, 17, 19).
A device according to any of the preceding claims, characterised by a said joint at each transverse end of the sheet-gripping means (15, 16), the said sheet-gripping means comprising a transverse beam (15) and a number of lugs (16) extending towards the front of the device and forming a first comb with the beam, disposed above the front edge of the bearing surface (1), the said front edge of the bearing surface having the profile of a second comb complementary with the first comb in order to grip the said edge zone of a sheet between them.
A press for shaping sheets of paper or cardboard, characterised in that it comprises a positioning device according to any of the preceding claims, disposed between the feed board and the cutting station.
Dependencies are inferred from the claim text.