Patent ID: 8476611

Claim:
A device comprising: a sensor device comprising: an optical sensor element having at least one sensor line and being configured and disposed to detect, within a sensor zone of the sensor device, at least one orientation feature of a material web and at least one light beam spot on the material web while the material web is being fed in a predetermined travel direction through the sensor zone of the sensor device; at least one light transmitter configured and disposed to produce the at least one light beam spot on the material web while the material web is being fed in the predetermined travel direction through the sensor zone of the sensor device; and a controller configured to determine: based on the detection of the at least one orientation feature of the material web, a deviation of the material web within a plane of the material web in the sensor zone of the sensor device; and based on the detection of the at least one light beam spot on the material web, a deviation of the plane of the material web in the sensor zone of the sensor device from a desired material web level.