Method and an apparatus for producing a drip-irrigation emitter

Details Method and an apparatus for producing a drip-irrigation emitter Method and an apparatus for producing a drip-irrigation emitter

1991-08-05

1993-04-06

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Combined

29450, 29525, 264250, 2643288, 264334, 425438, 425556, 425577, B29C 4516, B29C 6556

Patent

active

052001326

ABSTRACT:
A method for manufacturing a drip irrigation emitter, including the steps of molding onto an injection-mold core having at least n different active diameters, n different, axially spaced apart members of the emitter, at least n-1 of the members being substantially annular, the inside diameter of at least one of the annular members being a tight fit on the outside diameter of the next smaller of the members, stripping the members off the core, starting from the member having the largest inside diameter, thereby causing the members to be tightly nested one inside the other, in a predetermined axial and angular relationship, and ejecting the thus fully assembled emitter from the mold. There is also provided an injection mold for producing fully assembled multi-part drip-irrigation emitters.

REFERENCES:
patent: 3013308 (1961-12-01), Armour
patent: 3685933 (1972-08-01), Schneider
patent: 4281798 (1981-08-01), Lemeistrich

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