Drip irrigation hose and method for its manufacture

  • US 20020174944A1
  • Filed: 07/11/2002
  • Published: 11/28/2002
  • Est. Priority Date: 07/19/1994
  • Status: Active Grant
First Claim
Patent Images

1. A method for making drip irrigation hose comprising:

  • rotating an outlet forming wheel having a knife blade on its periphery;

    moving a strip of plastic film past the outlet forming wheel to form single slit outlets repeatedly along the strip as the knife blade rotates; and

    forming on the strip an elongated flow regulating passage and forming inlets to the flow regulating passage that are spaced from the outlets to form a substantial path length from each inlet to a corresponding outlet, wherein the outlets couple the flow regulating passage to the exterior of the hose.

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