B - Operations – Transporting – 21 – C
Patent
B - Operations, Transporting
21
C
26/155, 156/32
B21C 37/12 (2006.01)
Patent
CA 1300359
ABSTRACT OF THE DISCLOSURE An apparatus for fabricating multi-layer spiral tubes of the type that while the webs are being wrapped in a spiral form the adjacent edge portions of the webs are welded with each other to form spiral tubes, is improved in that the apparatus has a take-up drum for taking up the wrapped webs while rotating with the leading end of the web of the first layer fixedly secured thereto, a wrapping drum having the webs wrapped therearound and including a backing section for backing a welding location of the edge portions of the web of the first layer, a plurality of web feed devices provided adjacent one another for spirally feeding the webs on the wrapping drum of the spiral tubes of the preceding layers, a plurality of wrapping devices provided in combination with the respective web feed devices for spirally wrapping the webs on the wrapped drum or the spiral tubes of the preceding layers, and a drawing device for drawing from the wrapping drum the spiral tubes that are being formed continuously.
559390
Oe Tsutomu
Ozaki Tadao
Sudo Katsuzo
Uemukai Sadatomi
Yuzaki Yoshinori
Mitsubishi Jukogyo Kabushiki Kaisha
Oe Tsutomu
Ozaki Tadao
Riches Mckenzie & Herbert Llp
Sudo Katsuzo
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