Heat Sealing Jaw, Apparatus and Method
This invention relates to a heat sealing element for use in a heat sealing jaw in cooperation with an opposing backing jaw for sealing layers of film together to form a sealed portion and a notch within the sealed portion, the heat sealing element comprising: a sealing face for pressing the layers of film together against the opposing backing jaw and forming the sealed portion, the sealing face having a protrusion for forming the notch within the sealed portion; and a clamping portion adjacent to the sealing face, the clamping portion being disposed at an orientation diverging from a plane along which the layers of film are sealed together.
1 - 22 . (canceled)
23 . A heat sealing element for use in a heat sealing jaw in cooperation with an opposing backing jaw for sealing layers of film together to form a sealed portion and a notch within said sealed portion, said heat sealing element comprising:
(a) a sealing face for pressing said layers of film together against said opposing backing jaw and forming said sealed portion, said sealing face having a protrusion for forming said notch within said sealed portion; and
(b) a clamping portion adjacent to said sealing face, said clamping portion being disposed at an orientation diverging from a plane along which said layers of film are sealed together.
24 . The heat sealing element as defined in claim 23 , wherein said protrusion on said sealing face is disposed at a distance from said clamping portion.