THREADING DEVICE AND METHOD FOR THREADING THE TAIL OF THE WEB

摘要

A threading device and a method for threading a tail of a web, wherein, for guiding the path of a tail (T) separated from a full-width web (W) in a paper machine or a paper finishing device, the threading device comprises a suction channel (2), placed at least partly in a paper machine portion and provided with a reduced pressure for gripping the tail (T), and transfer means (S) for transferring the suction channel (2) in the portion of the paper machine and simultaneously for releasing the tail (T) to the portion. In the method for threading of the tail, before threading the full-width web (W) through a portion in a paper machine, the tail (T) is separated from the web (W), the tail (T) is cut, and the tail (T) is conveyed in the portion of the paper machine, after which the full-width web (W) following the tail (T) in a continuous manner is conveyed to the portion, by producing a reduced pressure in a suction channel (2), by transferring an inlet opening (2a) of the suction channel (2) close to the tail (T) separated from the web (W), by transferring the tail (T) into the suction channel (2) by means of the reduced pressure prevailing therein, and by releasing the tail (T) to the portion of the paper machine by transferring the suction channel (2) and particularly its inlet opening (2a) in the direction of the portion of the paper machine.