Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1981-08-24
1983-11-15
Simmons, David A.
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
156171, 156172, 156173, 156175, 156188, 156279, 2104971, 210499, 210504, 210506, 210509, B32B 3100
Patent
active
044156138
ABSTRACT:
For forming a perforated pipe a method is employed which includes winding on a mandrel having multiple spaced protrusions thereon angularly related strips arranged between the protrusions. These strips cooperatively define openings through which the protrusions extend. The strips are formed of fibres which are impregnated with a settable resin or plastic which combine with the fibres to form a tube adequate to resist a pressure of about 600 p.s.i. Because the protrusions are employed the fibres can be so impregnated as to be resin-rich. The openings may be screened with resin-poor granules arranged in vaulted configuration. A further strip may be wound around the foregoing arrangement to hold the granules against the resulting pipe.
REFERENCES:
patent: 2677466 (1954-05-01), Lowe
patent: 3173488 (1965-03-01), Rensvold
patent: 3327865 (1967-06-01), Thompson
patent: 3601156 (1971-08-01), Marks et al.
patent: 3692607 (1972-09-01), Shobert
patent: 4133379 (1979-01-01), Nuyman et al.
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