Sealing element for packaging machines
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United States of America Patent
Stats
-
Jul 23, 1996
Issued Date -
N/A
app pub date -
Mar 13, 1995
filing date -
Feb 26, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An assembly for heat sealing thermoplastic film, having a first jaw (11) and (optionally) a second jaw (not shown), an electrical impulse heat sealing element (12) mounted on the first jaw (11), electrical terminals (17) connected to the element (12), and at least one electrically and thermally insulating film or tape (14) between the first jaw (11) and the heat sealing element (12). At least one of the jaws is capable of transverse motion and is adapted to collapse a tubular film made from the thermoplastic film and passing between the jaws. The improved heat sealing assembly has a first jaw (11) which has a thermally insulting material (16) embedded therein along a length about equal to the width of the flattened film and having a width at least as great as the width of the sealing element.
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