Method and apparatus for making drip irrigation devices

Details Method and apparatus for making drip irrigation devices Method and apparatus for making drip irrigation devices

1992-11-03

1994-02-01

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624414, 156293, 156294, 156538, 239542, 239547, B29C 4702

Patent

active

052829162

ABSTRACT:
A method and apparatus for making a drip irrigation device by continuously extruding a tube and simultaneously feeding a plurality of dripper units in succession within the tube as it is extruded. Each dripper unit is arrested as it arrives at a first location which is a short distance downstream of the extrusion head where the extruded tube is still tacky, and is then moved transversely to bring it into light contact with the tacky surface of the extruded tube to cause the dripper unit to lightly adhere to the tube and to begin to move axially with it. A short distance downstream of the first location where the dripper unit has attained the same axial velocity as the extruded tube, the dripper unit is pressed into firm bonding contact with the tacky inner surface of the extruded tube.

REFERENCES:
patent: 3905749 (1975-09-01), Suzuki et al.
patent: 4191518 (1980-03-01), Kojimoto et al.
patent: 5022940 (1991-06-01), Mehoudar

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