Abstract: A continuous drip irrigation tube having a series of longitudinally extending capillary tubes formed on its wall integrally with said wall.

Abstract: A drip irrigation conduit comprising first and second elongated tubes. The tubes have an outer wall of sheet material defining the outer periphery of the tubes. A common wall of sheet material extends from one region of the outer wall to another region of the outer wall to separate the interiors of the tubes. A portion of the common wall overlaps a portion of the outer wall, and these overlapping portions have confronting surfaces. At least regions of the confronting surfaces are spaced apart to define a transfer passage leading from the first tube to the second tube. Discharge orifices lead from the second tube to the exterior of the outer wall.

Abstract: A method of forming holes in plastic tubes which includes advancing a rotating shaft into and through the wall of the tube while maintaining a rate of rotation sufficient to cause the material of the tube to be distressed sufficiently to fluidize and/or disintegrate from the area of operation of the shaft, moving the shaft from the hole, and allowing the periphery of the hole to solidify.