Installation for processing a paper web or corrugated cardboard web

摘要

An installation for the detection of projecting material defects in a paper web or corrugated cardboard web moved in a feed direction. The device comprises a sensor device comprising a first sensor unit with a first emitter for emitting first sensor beams and a second emitter for emitting second sensor beams and with a second receiver, wherein the first sensor beams run parallel to the material surface to be monitored of the paper web or corrugated cardboard web and travel along a first signal path S1 in-between. The sensor device further has a second sensor unit comprising a second emitter for emitting second sensor beams and a second receiver, wherein the second sensor beams run parallel to the material surface and travel along a second signal path S2 in-between. The first and second sensor units are oriented in such a way that the distance between the first and second sensor beams relative to the feed direction changes along their signal paths S1, S2.

主权项

1. An installation for processing a paper web or corrugated cardboard web, the installation comprising:
a first supply device for supplying the paper web or corrugated cardboard web to be processed; a printing device arranged downstream of the first supply device for applying a print to the paper web or corrugated cardboard web; a device for detection of material defects in the paper web or the corrugated cardboard web moved in a feed direction, the device comprising a sensor device and a signal evaluation unit, said sensor device comprising a first sensor unit and at least one second sensor unit, said first sensor unit comprising a first emitter for emitting first sensor beams, and a first receiver assigned to the first emitter for receiving the first sensor beams, wherein in order to detect the material defects, the first sensor beams extend parallel to a material surface to be monitored of the material web and travel along a first signal path between the first emitter and the first receiver, said at least one second sensor unit comprising a second emitter for emitting second sensor beams and a second receiver assigned to the second emitter for receiving the second sensor beams, wherein in order to detect the material defects, the second sensor beams extend parallel to the material surface to be monitored of the material web and travel along a second signal path between the second emitter and the second receiver, wherein the first sensor unit and the at least one second sensor unit are oriented in such a way that a distance between the first sensor beams and the second sensor beams relative to the feed direction changes along the first signal path and the second signal path, said signal evaluation unit being in signal communication with the first receiver and the second receiver for evaluation of the detected material defects, wherein the device for the detection of material defects in the paper web or corrugated cardboard web is arranged near the paper web or corrugated cardboard web between the first supply device and the printing device for the detection of material defects in the material web that are problematic for printing.