Apparatus for applying strips to coated web material

An apparatus for applying plastics strips (30) to an optionally partially perforated supporting material web (32) which has been made impervious to liquid through plastics coating of the entire surface area and in which the web is conveyed from a wind-off reel to a wind-up reel or to a packaging machine, characterised by an application station (39), means for passing and conveying the web (32) with the plastics coating continuously through the application station, a lower drum (51) on the side of the coated supporting material web (32) to which is sealed the plastics strip (30), means for driving the lower drum (51) in rotary manner, means for matching the speed of the material web (32) and the circumferential speed of the lower drum (51), fixed heating jaws (59) on and at an angular distance around the circumference of the lower drum (51) which on the side of the web (32) can be moved past in contact engagement with a back-pressure roller (50) rotatably fitted to the other side of the web, means (53, 54) for applying the plastics strip (30) to the heating jaws (59), the heating jaws (59) supplying the plastics strips (30) at a high temperature but which is below the extruder temperature, and supplying the plastic strips (30) to the plastics coating side of the web (32) at the same running speed and during the continuous movement of web (32) to apply the strips (30) to the web (32) by pressure sealing in such a way that in the longitudinal direction of the web (32) the strips (30) are spaced from one another.