Claims
- 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.
- 2. The method of claim 1, wherein the strip of plastic film has first and second margins, and wherein the method further comprises overlapping and sealing the first and second margins to form a tube from the strip of plastic film.
- 3. The method of claim 2, wherein the flow regulating passage lies between the overlapping margins.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of application Ser. No. 09/128,770, filed Aug. 4, 1998, which is a divisional of application Ser. No. 08/850,407, filed May 2, 1997, which issued as U.S. Pat. No. 5,865,377 on Feb. 2, 1999, which is a continuation-in-part of application Ser. No. 08/650,469, filed May 20, 1996, which issued as U.S. Pat. No. 5,634,595 on Jun. 3, 1997, which is a continuation of application Ser. No. 08/279,813, filed Jul. 19, 1994, which issued as U.S. Pat. No. 5,552,551 on Jun. 4, 1996.
Divisions (1)
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08850407 |
May 1997 |
US |
Child |
09128770 |
Aug 1998 |
US |
Continuations (2)
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09128770 |
Aug 1998 |
US |
Child |
10192959 |
Jul 2002 |
US |
Parent |
08279813 |
Jul 1994 |
US |
Child |
08650469 |
May 1996 |
US |
Continuation in Parts (1)
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08650469 |
May 1996 |
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Child |
08850407 |
May 1997 |
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