B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/748
B29C 55/02 (2006.01) B29C 53/10 (2006.01) B29D 7/01 (2006.01) B29C 47/00 (2006.01)
Patent
CA 1284864
ABSTRACT OF THE DISCLOSURE The apparatus of the invention provides gauge distribution in extruded plastic tubing, so that a more uniform roll thereof is obtained. The extruded plastic tube, usually blown to increase its diameter and decrease its wall thickness, is collapsed and passed through a diametrical slot in a rotor, which is rotated about a vertical axis so that any non-uniformity in wall thickness of the tube is distributed as much as possible around its periphery. The upwardly-moving tube passes over a skew member which turns it to move horizontally. Two spaced parallel end rollers are provided between one end of the slot and the rotor periphery, and each engages the tube during a respective 180° of rotation to deliver the tube to a fixed roller on the apparatus frame from whence it passes to the storage roll. Two deflection rollers are also provided on opposite sides of the slot, and each engages the tube in the rotation of the rotor close to zero and 360° to hold the tube away from the slot and ensure that it does not foul the portion of the tube emerging from the slot. A dancer roll may be provided to maintain constant tension. The tube engaging members may be rollers or hollow bars with air issuing apertures in the surfaces over which the tube passes to form a corresponding air cushion between the tube and the member surface.
540591
Gowling Lafleur Henderson Llp
Planeta Mirek
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