Patent ID: 6772496
Filing Date: 2004-08-10
Classification: A01G,B29C,B29L,Y02A,Y10T

Abstract:
Method for simultaneously manufacturing at least two irrigation conduits including the steps consisting in:a) continuously producing at least one strip made of plastic material (10, 10A), b) cutting out, by stamping, in said strip (10, 10A) through flow cavities (11, 11A), juxtaposed substantially on either side of a longitudinal plane of symmetry (P) of the strip (10, 10A) each flow cavity (11, 11A) including at a first end a feed chamber (13) intended to open out into one of two juxtaposed conduits (7a, 7b) and at another end a discharge chamber (14) intended to open out on the exterior of said one conduit, the stamping step being also provided so that the discharge chambers of the flow cavities extend substantially on either side of the plane of symmetry (P) of the strip and do not communicate with each other, c) continuously producing a tubular sleeve (17) made of plastic material intended to form said conduits, d) guiding said strip (10,10A) axially inside said sleeve (17) during its production, e) pinching said sleeve in at least a diametral zone to form an elongated two-part body (7) exhibiting symmetry with respect to said longitudinal plane (P) and including the two juxtaposed conduits (7a, 7b), joined by superposed bands (8, 9) integral with said sleeve, said strip (10, 10A) being secured in an impervious manner between the bands (8, 9), f) bonding said strip (10, 10A) to said bands (8, 9), and g) slitting said two-part body longitudinally along said plane of symmetry (P).