Patent ID: 7178316

Claim:
An ultrasonic sealing apparatus for transversely ultrasonically sealing a packing material comprised of a laminated body including at least a thermoplastic resin layer having a tubular form and containing a fluid, the apparatus, comprising: a horn having an elongated and flat sealing face, the sealing face having a width; and an opposing jaw with at least one elongated action face including a single flat pressing portion opposite from the sealing face and extending across at least a majority of the width of the sealing face for pressing a surface of the packing material in cooperation with the sealing face of the horn to define a transverse sealing zone of the tubular packing material, the at least one action face of the opposing jaw further comprising at least one groove disposed to a side of the single flat pressing portion for forming a molten thermoplastic resin bulge in a vicinal area of the at least one sealing zone for being in contact with the fluid in the tubular packing material and to control the thickness and width of molten thermoplastic resin flowing out of the transverse sealing zone to a side in contact with the fluid.