Hinged tubular heater for side sealing machine
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United States of America Patent
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Feb 18, 2014
Grant Date -
Feb 7, 2013
app pub date -
Aug 1, 2011
filing date -
Aug 1, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A tubular heating element which is resistant to damage caused by foreign material is disclosed. The tubular heating element is pivotably attached to the side sealing machine at its leading (upstream) edge. The trailing (downstream) edge of the tubular heating element is moved by means of a compressible force, such as an air cylinder. In this way, the air in the cylinder pushes the tubular heating element downward into the plane of the film. However, a foreign object located on the film can overcome the force of the air cylinder, thereby lifting the tubular heating element out of the path of the film.
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