Patent ID: 6894250
Filing Date: 2005-05-17
Classification: B23K,B29C

Abstract:
1. A method for continuous manufacture of drip irrigation tubes ( 2 ), the tube bodies ( 1 ) of which are obtained by means of an extrusion step for a plastic, in which tube bodies dosing elements ( 6 ) are set during the extrusion step with a spacing from one another which dosing elements each have a first chamber connected to the interior space of the tube body ( 1 ), which first chamber is connected to a second chamber ( 24 ) provided in the respective dosing element ( 6 ), which second chamber is disposed in a sealing way on the inner surface of the tube body ( 1 ), and in which tube bodies ( 1 ) at least one hole ( 15 ) penetrating the walling is made in the area of the second chamber ( 24 ) of the respective dosing element ( 6 ) with a laser beam ( 13 ) generated in a laser configuration ( 9 ), wherein an optical device ( 16 ) is used by means of which a laser beam ( 13 ) is directed, and whereby it is achieved that the laser beam ( 13 ) is converted into the form of a ring, a line ( 19 ) of high energy density being formed corresponding substantially to the ring shape at a separation (a) from the optical device ( 16 ), whereby a particle ( 20 ) is cut from the walling.