CORRUGATED DRAINAGE TUBING AND METHOD AND APPARATUS FOR MAKING DRAINAGE TUBING WITH HELICALLY ARRANGED DRAINAGE OPENINGS

CORRUGATED DRAINAGE TUBING AND METHOD AND APPARATUS FOR MAKING DRAINAGE TUBING WITH HELICALLY ARRANGED DRAINAGE OPENINGS

A thermoplastic corrugated drainage tube comprises annular peaks and valleys and a plurality of drainage openings internally cut about the circumference of each valley, the openings in each valley aligned with the openings in successive valleys along helical lines described by said openings. The app...

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1. Verfasser: FALES, DAVID E
Format: Patent
Sprache:eng ; fre
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AGRICULTURE
ANIMAL HUSBANDRY
CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPSOR SEAWEED
FISHING
FORESTRY
HORTICULTURE
HUMAN NECESSITIES
HUNTING
TRAPPING
WATERING
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creator FALES, DAVID E
description A thermoplastic corrugated drainage tube comprises annular peaks and valleys and a plurality of drainage openings internally cut about the circumference of each valley, the openings in each valley aligned with the openings in successive valleys along helical lines described by said openings. The application relates to a method and an apparatus for forming the openings. The method of forming the drainage openings comprises placing a cutting tool in the interior of the tubing and rotating the tool while moving the tubing axially past the tool. The cutting tool comprises a body having a plurality of radially projecting cutters spaced equidistantly about the cutter body and means for rotating the tool.
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The application relates to a method and an apparatus for forming the openings. The method of forming the drainage openings comprises placing a cutting tool in the interior of the tubing and rotating the tool while moving the tubing axially past the tool. 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subjects AGRICULTURE
ANIMAL HUSBANDRY
CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPSOR SEAWEED
FISHING
FORESTRY
HORTICULTURE
HUMAN NECESSITIES
HUNTING
TRAPPING
WATERING
title CORRUGATED DRAINAGE TUBING AND METHOD AND APPARATUS FOR MAKING DRAINAGE TUBING WITH HELICALLY ARRANGED DRAINAGE OPENINGS
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