Magnetically detectable plastic pipe

Details Magnetically detectable plastic pipe Magnetically detectable plastic pipe

1993-03-08

1994-08-23

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624413, 15624417, 1562724, 264105, 264108, 2642091, 235493, 138104, B32B 3104

Patent

active

RE0347019

ABSTRACT:
A magnetically detectable plastic, e.g., polyethylene, polyvinyl, etc., pipe for underground use comprises a hollow tubular plastic pipe having particles of magnetic material embedded in plastic and secured integrally with the wall of the pipe. The magnetic particles are of iron oxide or barium ferrite and of a size, shape, distribution and proportion such that the plastic pipe may be easily detected by magnetic detection apparatus on the surface when the plastic pipe is buried at a selected depth under the ground. The magnetic particles are uniformly distributed throughout the thickness and uniformly distributed around the entire circumference of the plastic pipe or the magnetic particles may be distributed in discrete portions of the plastic pipe, as for example, a uniform outer layer of the pipe or in stripes or strips extending along the pipe. The particles may be extruded with the plastic in forming the pipe, whether uniformly dispersed or in discrete regions or the pipe may be formed of plastic free of the magnetic particles and the magnetic particles provided in a separately applied strip which may be coextruded or fused or adhered to the wall of the pipe. The magnetic strips or magnetic portions of the plastic pipe may have selective areas or portions magnetized to encode information readable from the surface of the ground above the buried pipe or in inventorying pipe on the surface.

REFERENCES:
patent: Re30393 (1980-09-01), Sherlock
patent: 2597601 (1952-05-01), Sherman
patent: 2775736 (1956-12-01), Pies et al.
patent: 2854840 (1958-10-01), Anderson
patent: 2931383 (1960-04-01), Hadley
patent: 3111735 (1963-11-01), Ellis
patent: 3191106 (1965-06-01), Baermann
patent: 3229030 (1966-01-01), Baermann
patent: 3254859 (1966-06-01), Reisch
patent: 3367370 (1968-02-01), Sherlock
patent: 3504503 (1970-04-01), Allen
patent: 3513912 (1970-05-01), Boop
patent: 3568626 (1971-03-01), Southworth
patent: 3633533 (1972-01-01), Allen
patent: 3732617 (1973-05-01), Rowe et al.
patent: 3746034 (1973-07-01), Cosson
patent: 3764223 (1973-10-01), Lucero et al.
patent: 3908582 (1975-09-01), Evett
patent: 3918867 (1975-11-01), Beyer
patent: 3942147 (1976-03-01), Josephson
patent: 4021725 (1977-05-01), Kirkland
patent: 4055796 (1977-10-01), Nelson
patent: 4107601 (1978-08-01), Barmeier
patent: 4427943 (1984-01-01), Cloutier et al.
patent: 4430613 (1984-02-01), French
patent: 4449098 (1984-05-01), Nakamura et al.
patent: 4500595 (1985-02-01), Gerteisen et al.
patent: 4527123 (1985-07-01), Gilman et al.
patent: 4549039 (1985-10-01), Charlebois
patent: 4573016 (1986-02-01), Nakamura
patent: 4623282 (1986-11-01), Allen
patent: 4699838 (1987-10-01), Gilbert
patent: 4767237 (1988-08-01), Cosman et al.
patent: 4781958 (1988-11-01), Gilbert
patent: 5006806 (1991-04-01), Rippingale
patent: 5017873 (1991-05-01), Rippingale
patent: 5114517 (1992-05-01), Rippingale
patent: 5122750 (1992-06-01), Rippingale
"Ferromagnetism" Bozorth, Van Nostrand Co. (1951), Chapter 19, p. 838.
"There's more than one way to economically reference any survey monument permanently", Berntsen, Brochure, Jun. 1982.
"Flexible Magnetic Materials", M. Rouques, Engineers Digest, Feb. 1966, vol. 27, No 2, pp. 101-103.
"Koroseal Flexible Magnetic Strip and Sheet from B.F. Goodrich", B.F. Goodrich Brochure 1968.

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