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Method and apparatus for making a drip irrigation hose

DC
  • US 6,464,816 B1
  • Filed: 08/04/1998
  • Issued: 10/15/2002
  • Est. Priority Date: 07/19/1994
  • Status: Expired due to Term
First Claim
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1. A method for making drip irrigation hose comprising:

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

    maintaining a continuous moving strip of plastic film having first and second longitudinal margins in contact with the wheel to form slit outlets repeatedly along the first margin of the strip as the knife blade rotates;

    forming an elongated flow regulating passage and inlets to the flow regulating passage on one margin of the strip, the inlets being spaced from the outlets to form a substantial path length from each inlet to outlet;

    folding the strip to overlap the first and second margins so the first margin overlies the second margin and the flow regulating passage lies between the overlapping margins; and

    sealing the overlapping margins and the flow regulating passage to form a water supply passage, the inlets coupling the water supply passage to the flow regulating passage and the outlets coupling the flow regulating passage to the exterior of the hose.

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