Patent ID: 7374626
Filing Date: 2008-05-20
Classification: A61F,B29C,B29L

Abstract:
1. A method for bonding a body side wafer of an ostomy system and a further component of said ostomy system to each other, comprising the steps of: welding a body side wafer comprising a layer of polymeric foam to a further component of said ostomy system using an ultrasonic welding apparatus comprising an anvil and a horn, said horn comprising a first welding surface, said anvil comprising a second welding surface, and at least one of the first and second welding surfaces comprising a pattern of projections, the projections comprising a plurality of adjacently placed projections comprising one selected from a group consisting of pyramids, truncated pyramids, prismoids, cones, truncated cones, and cylinders, said welding step comprising the steps of clamping areas to be welded of the body side wafer and the further component between the first and second welding surface, and ultrasonically vibrating said horn with respect to said anvil, wherein, the further component is welded onto said layer of polymeric foam of the body side wafer, and the horn has an inner perimeter, an outer perimeter, a welding profile area defined between the inner and outer perimeters, and the projections are placed adjacent each other along the inner and outer perimeters and fill the welding profile area from the inner perimeter to the outer perimeter.