HEISSSIEGELVORRICHTUNG

摘要

To proved a heat-sealing apparatus capable of: achieving a complete sealing property by causing a liquid or dirt having entered small irregularities in a tube inner face to flow out of a sealed zone together with a molten resin; and a heat seal with no crack caused by the molten resin having flowed into a container and with an excellent compression strength. A heat-sealing apparatus for forming a packing material (1) made of a laminate including a synthetic resin layer into a tubular-shape, and transversely heat-sealing the tubular packing material with fluid by using a sealing jaw (3) having a high-frequency coil (2) with a ridge (11) on its flat action face and a jaw (5) opposing to it, wherein a groove (16) is disposed on at least one action face of the high-frequency coil (2), capable of forming a synthetic resin bulge adjacent to the outer side of a zone to be sealed on a container's interior side.