Perforated drainpipe and method of making same

Details Perforated drainpipe and method of making same Perforated drainpipe and method of making same

1980-08-13

1983-12-20

Dixon, Jr., William R.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including grain, strips, or filamentary elements in...

156176, 156187, 156195, 15624413, 264173, 428113, 428222, 428 36, 405 43, 405 48, E02B 1100, B32B 2902, B65H 8100, B29C 1900

Patent

active

044218109

ABSTRACT:
A perforated drainpipe in which at least one sheet comprised of polymeric material is shaped in generally tubular configuration with adjacent edges thereof being slightly spaced apart to define therebetween a gap extending along the tubular sheet, and at least one ribbon comprised of polymeric material, which can be the same or different as that in the tubular sheet, helically wound around the tubular sheet, preferably by extrusion, and integrally bonded thereto so as to reinforce the same and maintain the shape of the same. The sheet or sheets can extend longitudinally, being bent or curved width-wise so as to have such tubular shape, with the gap extending longitudinally.

REFERENCES:
patent: 3281897 (1966-11-01), Mercer
patent: 3499822 (1970-03-01), Rasmussen
patent: 3505162 (1970-04-01), Rasmussen
patent: 3565744 (1971-02-01), Rasmussen
patent: 3632711 (1972-01-01), Rasmussen
patent: 3677873 (1972-07-01), Rasmussen
patent: 3753352 (1973-08-01), McNally
patent: 4061272 (1977-12-01), Winston
patent: 4113546 (1978-09-01), Anders
patent: 4138503 (1979-02-01), Ziolko
patent: 4207045 (1980-06-01), Rasmussen
patent: 4227957 (1980-10-01), Keuchel et al.
patent: 4294638 (1981-10-01), Rasmussen
patent: 4322179 (1982-03-01), Lamphier et al.
patent: 4331497 (1982-05-01), Gilman et al.

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