Device for detecting the marginal edge and marking of a moving web of material
First Claim
1. A device for detecting a marginal edge and a marking substantially extending in a longitudinal direction of a moving material web, comprising:
- at least one optical sensor (4) directed at the material web (13) for scanning the web (13) transversely to the moving direction;
at least one first light source (6) associated with the optical sensor (4) and being directed at an area (24) on the material web so that the sensor (4) exclusively detects light (14) reflected by the material web (13) in a diffused manner; and
at least one second light source (7) associated with the optical sensor (4) for emitting diffused light (22), wherein the first light source and the second light source can be alternately employed.
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Accused Products
Abstract
A device for detecting the marginal edge or a marking of a material web. The device contains an optical sensor and two light sources associated with the optical sensor. The first light source emits directed light beams and aims such beams at the material web. The first light source is formed by a plurality of light-emitting diodes, arranged such that the light reflected by the material web in a diffused manner cannot be detected by the optical sensor. A second light source is also associated with the optical sensor. The second light source contains a diffuser disk. The diffuser disk generates diffused light that is emitted in all three-dimensional directions. When the second light source is active, the condition of reflection is satisfied so that it is possible to scan the material web having mirror-like reflection.
13 Citations
24 Claims
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1. A device for detecting a marginal edge and a marking substantially extending in a longitudinal direction of a moving material web, comprising:
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at least one optical sensor (4) directed at the material web (13) for scanning the web (13) transversely to the moving direction;
at least one first light source (6) associated with the optical sensor (4) and being directed at an area (24) on the material web so that the sensor (4) exclusively detects light (14) reflected by the material web (13) in a diffused manner; and
at least one second light source (7) associated with the optical sensor (4) for emitting diffused light (22), wherein the first light source and the second light source can be alternately employed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A device for detecting the marginal edge and a marking extending in a longitudinal direction of a moving material web, comprising:
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at least one optical sensor (4) directed at the material web for scanning the web transversely to the direction (16) of the material web (13);
at least one first light source (6) associated with the sensor (4) and being directed on an area (24) on the material web such that the sensor (4) exclusively detects light reflected by the material web in a diffused manner; and
at least one second light source (7) associated with the sensor (4) for emitting diffused light (22), wherein the first and second light sources are simultaneously employed. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification