Pressure compensating drip tape and related method
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United States of America Patent
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Issued Date -
Nov 24, 2005
app pub date -
May 24, 2004
filing date -
May 24, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for applying a first elongated strip of material over a second elongated strip of material wherein the second strip of material includes a pair of marginal edges on opposite sides of a secondary flow path for an irrigation drip tape, includes (a) applying heat to the second strip along the marginal edges while simultaneously shielding at least a center portion of the secondary flow path from the heat; and (b) pressing the first elongated strip over the second elongated strip to thereby heat seal the second elongated strip to the first elongated strip along the marginal edges. A related drip tape product includes a flexible tubular member having an interior defining a primary flow path, and a flow path strip bonded to an interior surface of the tubular member formed with a plurality of secondary flow paths. The flow paths have open sides facing the interior of the tubular member, and a thin, flexible membrane is bonded along marginal edges thereof to the flow path strip to close the open sides of the secondary flow paths.
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