B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/663
B29C 67/20 (2006.01) B29C 53/52 (2006.01) B29C 65/00 (2006.01) B29C 65/02 (2006.01) B31B 19/90 (2006.01)
Patent
CA 1200356
ABSTRACT OF THE DISCLOSURE: Process for the continuous production of a foam tube slit in the longitudinal direction and formed from a length of a thermoplastic plastic by shaping of the length in the warmed thermoelastic or thermoplastic condition at right angles to its longitudinal direction into a tubular cross-section and application of the bands of a closure, especially slide closure, formed from thermoplastic plastic to the longitudinal edges of the tube slit which are directed towards one another, by welding, heat sealing, bonding of the like. The closure bands are elongated by application of a tensile force before the bonding with the shaped still warm foam tube to the same extent as the foam tube shrinks on cooling after application of the closure. And an apparatus to carry out said process.
413173
Feige Siegfried
Osterhagen Gerhard
Dynamit Nobel Aktiengesellschaft
Robic Robic & Associes/associates
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