The present invention relates to a method of attaching a grip tab (1, 2) to along at least one of two opposite edges of a releasable carrier layer (6) of a film dressing web (3), said web includes a film layer (4) on a first side coated with adhesive (5) and a carrier layer (6) releasably attached to the film layer (4) on a second side thereof being opposite to the first side, the film layer (4) and the carrier layer (6) having the same dimensions, including the steps of, -choosing a material for the carrier layer (6) that is incompatible with the film layer (4) from a heat welding point of view, -feeding said film dressing web (3) in a machine direction, -applying a strip of a material (1, 2) compatible with the carrier layer (6) from a heat welding point of view along at least a part of an edge portion of at least one of the opposite sides of said web (3) extending parallel to the machine direction, and -affixing said at least one strip (1, 2) to the carrier layer (6) and simultaneously cutting away an outermost part of the web (3) with the at least one strip (1, 2) applied thereto by passing the web with the at least one strip applied thereto through an ultrasonic welding device (8-10).
