ULTRASCHALLSIEGELVORRICHTUNG

摘要

To provide an ultrasonic sealing apparatus with an excellent sealability capable of: positively discharging contaminants such as juice pulp from sealing zones together with molten thermoplastic resin; and preventing a formation of the undulated molten resin beads by controlling the thickness and the width of the molten resin that flows out to the side in contact with a fluid. In an apparatus wherein a packing material consisting of a laminated body (1) comprising the thermoplastic resin layers is made into a tubular form and the tubular packing material is transverse-ultrasonically sealed with a fluid, a horn (12) with an elongated and flat sealing face, and grooves which can form the molten thermoplastic resin bulges in the vicinal area of the side of the sealing zones on the action face of the opposing jaw in contact with a fluid pressing the packing material in cooperation with the sealing face of the said horn, are disposed. Further, disposing grooves which can form the molten resin bulges in the vicinal area of the cutting side of sealing zones or an incline to allow the molten resin to flow out of sealing zones to the cutting side on the action face of the opposing jaw, is desirable.