Method of making fluid-issuing openings through the walls of flexible plastic members, particularly dripper emitters

• Main Author: DRORI, MORDEKI
• Format: Patent
• Language: English
• Published: 01.01.1980
• Subjects: AGRICULTURE; ANIMAL HUSBANDRY; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPSOR SEAWEED; CUTTING; CUTTING-OUT; FISHING; FORESTRY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HAND CUTTING TOOLS; HORTICULTURE; HUMAN NECESSITIES; HUNTING; PERFORATING; PERFORMING OPERATIONS; PUNCHING; SEVERING; SEVERING BY MEANS OTHER THAN CUTTING; STAMPING-OUT; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; TRAPPING; WATERING

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.