Method for the continuous production of tubular bodies
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United States of America Patent
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May 27, 2003
Grant Date -
N/A
app pub date -
Jun 18, 2001
filing date -
Jan 11, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and a device for the continuous production of tubular bodies with an internal longitudinal separating wall for the production of tubes having two chambers which are separated from each other. An endless extruded tube having an internal longitudinal separating wall is produced and individual tubular bodies of a defined length are cut off by means of a cutting device and subjected to further processing. The tubular body is made from a film having a central, semicircular part and two angled lateral wings. The semicircular part is covered by a second film serving as separating wall. A transverse cutter having two rotating blades is used as cutting device. The rounded extruded tube having a longitudinal separating wall is fed between the two rotating blades after having been collapsed and oriented in such a way that the collapsed extruded tube has a central three-layered part which consists of the collapsed, oriented separating wall in the middle and an upper and lower flat tubular wall body section on either side, as well as two two-layered areas which adjoin the three-layered area on both sides. In this way each two-layered area consists of bent, superimposed tubular body wall sections.
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