Method and apparatus for producing a tubular article having...

Details Method and apparatus for producing a tubular article having... Method and apparatus for producing a tubular article having...

B - Operations, Transporting

65

D

18/935

B65D 1/02 (2006.01) B29C 31/00 (2006.01) B29C 49/00 (2006.01) B29C 49/14 (2006.01) B29C 49/22 (2006.01) B29C 49/54 (2006.01) B29C 55/22 (2006.01) B29C 55/30 (2006.01) B29C 59/04 (2006.01) B29C 67/00 (2006.01)

Patent

CA 1167616

Abstract of the Disclosure A tubular article having a peripheral groove is formed by providing the groove in the wall of a tubular blank made of thermoplastic material such as polyethylene terephthalate by applying simultaneously a pressure against the wall of the blank and axial stretching forces. In the bottom of the groove the material is drawn to yielding and the blank is simultaneously elongated.

378540

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