ARRANGEMENT IN TAIL THREADING OF A FIBER WEB FORMING MACHINE, APPARATUS FOR THE ARRANGEMENT AND A FIBER WEB FORMING MACHINE

摘要

The invention relates to an arrangement in tail threading of a fibre-web forming machine, which is fitted to a twin-wire draw drying section, and which includes at least one belt conveyor (10), for threading the web-threading tail (22), to be fitted in connection with a drying cylinder (11.1,11.2), which belt conveyor (10) includes a frame structure (31) and at least two return rolls (16, 17) in it, a belt loop (20) penetrable by air, which is arranged to run over the return rolls, vacuum means (21) for creating a vacuum in the belt loop, and which arrangement includes, in addition, a doctor device (23) fitted, in front of the belt conveyor, on the web-threading-tail (22) arrival side (24), the width of which doctor device is arranged to mainly correspond to the path of the web-threading tail. At least the belt conveyor is equipped with a linear-motion mechanism (54, 55), for moving it to the web-threading position and correspondingly away from it. In addition, the invention also relates to a device for the arrangement and a fibre-web forming machine equipped with the arrangement or the device.