F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
189/34
F16L 11/112 (2006.01) B29C 53/74 (2006.01) B29C 53/78 (2006.01) B29C 53/80 (2006.01) F16L 11/118 (2006.01) F16L 11/16 (2006.01)
Patent
CA 1289487
ABSTRACT OF THE DISCLOSURE A method of manufacturing a plastic pipe having a spiral ridge on an outer surface and a flat inner surface, comprising the steps of: (a) supplying a plastic ribbon in a softened state onto a plurality of rotating forming rolls arranged circularly, so that the plastic ribbon is spirally wound around the forming rolls while partially overlapping to be fused with each other (b) spirally winding an endless forming core belt around the forming rolls in such a manner that the endless forming core belt is sandwiched between the plastic ribbon already wound around the forming rolls and the plastic ribbon newly supplied, thereby providing the resulting plastic pipe with a spiral ridge; (c) cutting the spiral ridge after the plastic ribbon is fused with each other and sufficiently cooled, thereby providing the spiral ridge with a slit extending along it to remove the endless forming core belt from it; and (d) winding a second plastic ribbon in a softened state around the spiral ridge to fuse the second plastic ribbon thereto, thereby sealing the slit.
560569
Nagayoshi Akio
Nagayoshi Kiyoharu
Smart & Biggar
Tonen Sekiyukagaku Kabushiki Kaisha
Uc Industry Co. Ltd.
LandOfFree
Plastic pipe and method and appratus for manufacturing same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Plastic pipe and method and appratus for manufacturing same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plastic pipe and method and appratus for manufacturing same will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1194951