Method and apparatus for forming a smooth tube from a flat tape

Details Method and apparatus for forming a smooth tube from a flat tape Method and apparatus for forming a smooth tube from a flat tape

B - Operations, Transporting

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113/55

B21D 51/16 (2006.01) B21D 5/10 (2006.01) B21D 49/00 (2006.01) B21D 51/28 (2006.01) H01B 13/26 (2006.01)

Patent

CA 1177699

- 16 - ABSTRACT OF THE DISCLOSURE A method and an apparatus for forming a tube from a flat tape, more particularly for forming a shielding tape around a cable core, is disclosed. The tape is moved longitudinally along a straight path and simultaneously deflected laterally from a flat to a circular configuration around a mandrel thereby forming a tube which is increas- ingly stretched in the longitudinal direction from the center towards the edges of the tape, and the tape is stressed longitudinally over an eccentric ring attached to the outside surface of the mandrel in substantially inverse proportion to the stretch imparted to the tape during forming of the tube.

376346

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