Flexible multilayer tubular structure for irrigation and process

Details Flexible multilayer tubular structure for irrigation and process Flexible multilayer tubular structure for irrigation and process

1977-05-25

1979-02-13

Drummond, Douglas J.

Fluid sprinkling, spraying, and diffusing

Distributor or nozzle in circumferential wall of flexible...

239145, 428 36, 156290, 156252, B05B 1500, B05B 316, F16L 1104

Patent

active

041391594

ABSTRACT:
A plastic tubular irrigating structure is provided for agricultural and other irrigation systems. The structure comprises (A) a flexible outer layer of a thermoplastic synthetic resin tube having at least one continuous fin-like heat-sealed portion along its length and watering orifices, and (B) a flexible inner layer, as a filter, of a water-permeable, water-insoluble sheet, preferably a nonwoven fibrous sheet, fixed partly to the inside of the outer layer (A), the inner layer (B) being permeable to a larger amount of water than the outer layer (A). In the absence of water supply, the structure is a flattened tube, but upon supply of water therethrough, it assumes an expanded tubular shape.

REFERENCES:
patent: RE28095 (1974-07-01), Chapin
patent: 3777987 (1973-12-01), Allport
patent: 3830067 (1974-08-01), Osborn
patent: 3989572 (1976-11-01), Swartz

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