VERFAHREN UND EINRICHTUNG ZUM ULTRASCHALLVERSCHWEISSEN UND ULTRASCHALLSCHNEIDEN VON TEXTILFOLIEN

摘要

An ultrasonic seal and cut method and apparatus comprises an ultrasonic sealing and cutting station which includes a horn adapted to be resonant at an ultrasonic frequency and an oppositely disposed anvil having a sealing surface and a cutting surface. As sheet material is passed through the station, the sheet material is cut and sealed in a marginal region adjacent to the cut. A substantially thermoplastic filament, either monofilament or multifilament, is fed together with the sheet material through the station in a position to cause the filament to fuse with the material in the marginal region. The addition of the filament permits the ultrasonic seal and cut method to be used for sheet material having a relatively low thermoplastic fiber content, exhibiting an open mesh weave, or being made from natural fibers.