A method for severing and sealing sections of material
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United States of America Patent
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-
Oct 9, 1990
Issued Date -
N/A
app pub date -
May 17, 1989
filing date -
Jul 25, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A preheater assembly for softening a selected portion of plastic stock material prior to severing and edge sealing is disclosed. The preheater assembly includes a pair of opposed preheaters, each having a heater tip connected to a source of heated air. The air flows through the tip to maintain it at a preselected temperature. The preheaters are mounted on opposite sides of the stock material for motion toward the material to engage it on opposite sides to heat and soften it, and away from the material to release it. Clamp elements engage the stock material during the heating and softening process.
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