Patent ID: 8778120
Filing Date: 2014-07-15
Classification: A61M,B29C,B29K,B29L

Abstract:
1. A method for laser welding a PVC-free tube segment to a tubular shaped body through the use of a laser and a minor, said method comprising: a) providing a PVC-free tube segment and a tubular shaped body, wherein the tube wall of the tube segment is constructed from at least two material layers that differ from each other, and one of these layers contains, at least portionally, an absorber for laser radiation, b) positively inserting the tube segment and the tubular shaped body into one another with the result that the surface regions of the tube segment and of the tubular shaped body overlap, c) arranging the tube segment and the tubular shaped body, with the overlapping surface regions, in front of the minor, and d) irradiating the tube segment and the tubular shaped body, with the overlapping surface regions, with direct laser radiation from a single side only, with the result that the laser beams transmitted from the tube segment or from the tubular shaped body, as well as laser beams reflected by the tube segment or tubular body, are reflected by the mirror and are again partially incident upon the tube segment and/or the tubular shaped body, a weld connection being realized between the tube segment and the tubular shaped body, wherein said minor has the shape of the inner surface of a hollow cylinder, and said laser is a diode array laser, and said direct laser radiation is in the form of a laser beam that has a convergent portion and a divergent portion and the divergent portion irradiates said tube segment and said tubular shaped body.