Process and device for the internal welding of plastic tubes
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United States of America Patent
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Dec 11, 2012
Grant Date -
Jun 28, 2012
app pub date -
Feb 28, 2012
filing date -
Sep 28, 2006
priority date (Note) -
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Abstract
The invention relates to a process for manufacturing plastic packaging in tubular form, which process comprises a wrapping step during which a laminate (11) is wrapped, an abutting step during which the edges (8, 9) of the laminate (11) are butted together and a fastening step during which said edges (8, 9) of the laminate (11) are welded together, characterized in that a bead (12) of plastic in the molten state is extruded and deposited on the internal face of the packaging so as to cover at least the weld zone (10) defined between the edges. The energy needed to produce the weld (10) comes from the plastic bead (12).
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