Continuous tube emitter

Details Continuous tube emitter Continuous tube emitter

A - Human Necessities

01

G

61/34

A01G 25/06 (2006.01)

Patent

CA 1230981

CONTINUOUS TUBE EMITTER ABSTRACT OF THE DISCLOSURE A continuous tube emitter and method of manufacture. The emitter comprises an elongated flexible plastic tube with a plurality of pressure-responsive flow control units internally overlying small outlet openings in the tube to control the flow rate of irrigation water through the outlet openings. The flexible plastic tube is formed from an elongated thin-walled web preferably having a plurality of flow control patches on one side, wherein each patch has a valve face defined by at least one shallow drip emission groove leading into a shallow valve recess of wider cross section. Small outlet openings are cut through the web and the valve recesses. A longitudinal margin of the web is trimmed to form laterally projecting flaps at longitudinal positions generally corresponding with the flow control patches. The web is then rolled and longitudinally seamed to form the continuous tube emitter with the flaps each internally overlying the valve recess and a portion of the drip emission groove of the aligned patch.

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