Device for detecting edges of sheet-shaped materials
AssigneeHeidelberger Druckmaschinen AG
InventorsKonrad Langbein, Jochen Graeber, Hartwig Huelz
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Abstract
A device for detecting edges of sheet-shaped print materials (1), especially of transparencies, that are moved along a transport path through a sheet-processing machine has a beam transmitter (31) and a beam receiver (32), whereby beam transmitter (31) and beam receiver (32) are mounted on different sides of the transport path in such a way that the beam path forms an acute angle to the surface of the sheet-shaped print material (1). Electronics (36) evaluate the beam received at the beam receiver (32), whereby the beam receiver (32) is at a lesser distance to the transport path in comparison to the beam transmitter (31).
Claims22
A device for detecting edges of sheet-shaped print materials that are moved along a transport path through a sheet-processing machine comprising:
- a beam transmitter for transmitting a light beam towards the print materials;
- a beam receiver which receives the light beam and provides a beam indicator signal indicative thereof, wherein the beam transmitter and beam receiver are disposed on opposite sides of the transport path in such a way that the beam forms an acute angle to the surface of the sheet-shaped print material;
- and,
- a controller for evaluating the beam indicator signal and detecting the sheet-shaped materials,
- wherein the beam receiver is disposed a lesser distance to the transport path than the beam transmitter.
A method for detecting edges of sheet-shaped print materials that are moved along a transport path through a sheet-processing machine comprising the steps of:
- transmitting a light beam from a beam transmitter towards the sheet-shaped print materials at an acute angle to the surface thereof;
- receiving the light beam with a beam receiver and providing a beam indicator signal indicative thereof, wherein the beam transmitter and beam receiver are disposed on opposite sides of the transport path;
- evaluating the beam indicator signal and detecting the sheet-shaped materials;
- and,
- wherein the beam receiver is disposed a lesser distance to the transport path than the beam transmitter.
Dependencies are inferred from the claim text.