Drip irrigation hose and method of manufacture

Details Drip irrigation hose and method of manufacture Drip irrigation hose and method of manufacture

B - Operations, Transporting

05

B

B05B 1/20 (2006.01) A01G 25/02 (2006.01) B29C 53/48 (2006.01)

Patent

CA 2164983

A drip irrigation hose in which the outlets from the regulating passage each comprise a single longitudinal slit (46 47). The slits are sufficiently long and the film is sufficiently flexible so the water drips from the outlets when the hose is pressurized. The slits are sufficiently short and the film is sufficiently rigid so the outlets close completely when the hose is depressurized, inhibiting clogging. An apparatus for making the hose includes an outlet forming wheel (20) having a knife blade (30) on its periphery, a backing wheel (26) engaging the outlet forming wheel to establish a first nip (28) therebetween and having a circumferential slot (32) into which the knife blade fits at the first nip, and a rib forming wheel (22) having impressions around its periphery that define a desired track pattern for the ribs. The outlet forming wheel and the rib forming wheel are mounted on a common shaft to operate in synchronism.

Tuyau d'irrigation par ruissellement dans lequel les sorties du passage de régulation comprennent chacune une seule fente longitudinale (46, 47). Les fentes sont suffisamment longues et le film est suffisamment flexible pour que l'eau ruisselle par les sorties lorsque le tuyau est mis sous pression. Les fentes sont suffisamment courtes et le film suffisamment rigide pour que les sorties se ferment complètement lorsque le tuyau n'est plus sous pression, empêchant l'obstruction. Un appareil de production du tuyau comprend une roue (20) de formage de sortie présentant une lame de couteau (30) sur sa périphérie, une contre roue (26) venant au contact de la roue de formage de sortie afin d'établir un premier pincement (28) entre lesdites roues, et présentant une fente circonférentielle (32) dans laquelle vient la lame de couteau au niveau du premier pincement, ainsi qu'une roue (22) de formage de nervures portant des impressions sur sa périphérie, lesquelles définissent une configuration de voie désirée pour lesdites nervures. La roue de formage de sortie et la roue de formage de nervures sont montées sur un axe commun afin de fonctionner de manière synchronisées.

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