B - Operations – Transporting – 31 – C
Patent
B - Operations, Transporting
31
C
154/53.13
B31C 3/00 (2006.01) B29C 53/60 (2006.01) B29C 65/00 (2006.01) B29C 65/02 (2006.01) B29C 65/10 (2006.01) B29C 65/14 (2006.01)
Patent
CA 1109779
ABSTRACT OF THE DISCLOSURE In the manufacture of cylindrical tubes for containers, a foil web and at least one fibre web are helically wound on a heated, rotating mandril. The foil web is wider than the fibre web and its edges lie outside the long edges of the fibre web. The foil web and the fibre web are fed into the mandril at an angle such that the free edges of the foil web are placed against each other and welded together. The surface of the fibre web facing the plastics-foil web is coated with a plastics layer which can be heated to a tacky state or to a molten state such as to be joined with the plastics-foil web. Heat is applied to the overlapping edge portions. A heated fibre web is wound on the other two webs in a manner such as to weld the overlapping edge portions.
317735
Assi Can Aktiebolag
G. Ronald Bell & Associates
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