Patent ID: 6896758

Claim:
A method for fabricating drip irrigation pipes comprising the following steps: a) Extruding a plastic pipe ( 5 ) through an extruding head ( 1 ); b) Progressively reducing the pipe ( 5 ), from the diameter coming out of the extruding head to a final diameter, during which reduction the extruded pipe ( 5 ) has a conical length; c) Inserting a plurality of dripping elements ( 4 ) consecutively and keeping pace with the advance of the extruded pipe, through the extruding head ( 1 ) and into the extruded pipe ( 5 ); d) Advancing, dragging and/or pushing each dripping element ( 4 ) to an area of the pipe ( 5 ), whereat each dripping element ( 4 ) is brought to contact with a predetermined area of the inner surface of the pipe ( 5 ), while having a predetermined speed relative to the speed of the pipe when contact occurs; e) Cooling the pipe ( 5 ) with the dripping elements; f) Perforating the pipe ( 5 ) where the dripping elements ( 4 ) are provided; Characterized in that g) At least before the contact between the pipe ( 5 ) and each dripping element ( 4 ) occurs, the dripping element ( 4 ) has a higher speed than the pipe ( 5 ); and h) the speed of the dripping elements ( 4 ) is higher than that of the pipe ( 5 ), at least immediately before the contact with the pipe ( 5 ) occurs and until the dripping element ( 4 ) hits the wall of the pipe ( 5 ); the advancing, dragging and/or pushing force after the dripping elements ( 4 ) contact the pipe ( 5 ) is same as the dragging, advancing and/or pushing force before the dripping elements contact the pipe ( 5 ).