Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With bending – folding – winding – or wrapping means
Patent
1994-02-14
1995-02-07
Ball, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With bending, folding, winding, or wrapping means
156203, 156209, 264284, 425385, 425403, B05B 1500, B29C 5308
Patent
active
053873076
ABSTRACT:
A drip irrigation tape consists of a strip of flexible material having an elongated, indented channel formed along a first side edge, the channel being of serpentine configuration, the strip being folded lengthwise so that the side edges overlap to form a first conduit, and the opposite side edges being joined together at least along spaced seal lines along opposite edges of the channel to define a secondary conduit. Inlets and outlets are provided along the length of the channel. A method for manufacturing the tape includes the steps of forming the indented channel on a mandrel before sealing the overlapping edges of the strip together by heat sealing or ultrasonic welding.
REFERENCES:
patent: 3911187 (1975-10-01), Raley
patent: 4126998 (1978-11-01), Gilead
patent: 4211743 (1980-07-01), Nauta
patent: 4473191 (1984-09-01), Chapin
patent: 4722759 (1988-02-01), Roberts
patent: 4874132 (1989-10-01), Gilead
Ball Michael W.
Stemmer Daniel J.
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