Method and device for positioning the beginning of a web of material, especially a web of paper, against the roll of a winder from below

In a web winding apparatus including a winder roll, and means for positioning the beginning of a web of material against said roll, said means including an upright plate-shaped web-positioning mechanism and a supply of compressed air to convey the beginning of a web against said mechanism, the improvement which comprises an upright baffle that extends over part of the operating width of said roll, and at least one flat-jet nozzle with several air-emergence openings that parallel the baffle and open upward, the openings being about 0.5 to 1 mm away from the baffle, whereby the compressed air passes in an essentially laminar flow up along the surface of and essentially parallel with the surface of the baffle.