Method of making fluid-issuing openings through the walls of fle

Cutting – Processes – With preparatory or simultaneous ancillary treatment of work

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83 30, 83 54, 219121LM, 239547, B26D 714

Patent

active

041810511

ABSTRACT:
Described is a method of making fluid-issuing openings through the wall of flexible plastic members, particularly fluid conduits, by forming each opening through a small radius of curvature portion of the conduit wall while the respective wall portion is of curved oblong shape in cross-section, such that during use of the conduit, it assumes a circular shape, thereby increasing the radius of curvature of the wall portion and reducing the cross-sectional area of the outer part of the opening formed therethrough. The method is particularly described for producing linear-source water irrigation emitters which have a smaller sensitivity to clogging, which are easier to clean, and which have a smaller sensitivity to pressure variations in the water supply line.

REFERENCES:
patent: 2687329 (1954-08-01), Hunter
patent: 3980104 (1976-09-01), Kabai

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