Drip irrigation tape and method of manufacture
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United States of America Patent
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Jun 7, 1994
Issued Date -
N/A
app pub date -
Feb 8, 1993
filing date -
Feb 16, 1988
priority date (Note) -
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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.
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