Abstract: The invention relates to a laser head (11) for connecting tubular parts (1, 3, 12, 13) by the laser transmission method and to a method of connecting the tubular parts (1, 3, 12, 13) by means of the laser head (11). The laser head (11) and the method that can be performed by the laser head (11) are suitable in particular for connecting a connecting element or branching element (1) to one end of a plastic pipe (3). The laser head (11) makes simultaneous welding possible and has at least two shell parts (16) that can be radially separated from each other so that the laser head (11) can be placed around a connecting section (4) or a connecting region (15) of the tubular parts (1, 3, 12, 13). A number of laser sources (17) are arranged in the shell parts (16) in such a way that the laser beams (7) emerging from the laser sources (17) overlap at the connecting section (4) or at the connecting region (15) of the parts (1, 3, 12, 13).

Abstract: An induction connecting sleeve for connecting weldable thermoplastic elements by means of fusion, with at least two sockets for the insertion of connection sections of the thermoplastic elements to be connected, and with an induction heating element embedded in the sockets, with operative sections of the induction heating element surrounded completely by a weldable thermoplastic material, and with the induction heating element arranged coaxially to the sockets. The induction heating element may be manufactured of metallic material with spring characteristics and to embed it under pre-tension in the thermoplastic material of the sockets. When the induction heating element is heated and the thermoplastic material of the socket of the induction connecting sleeve is plasticized, the induction heating element relaxes which causes radial pressure to build towards the connection section.

Abstract: The invention relates to a laser head (11) for connecting tubular parts (1, 3, 12, 13) by the laser transmission method and to a method of connecting the tubular parts (1, 3, 12, 13) by means of the laser head (11). The laser head (11) and the method that can be performed by the laser head (11) are suitable in particular for connecting a connecting element or branching element (1) to one end of a plastic pipe (3). The laser head (11) makes simultaneous welding possible and has at least two shell parts (16) that can be radially separated from each other so that the laser head (11) can be placed around a connecting section (4) or a connecting region (15) of the tubular parts (1, 3, 12, 13). A number of laser sources (17) are arranged in the shell parts (16) in such a way that the laser beams (7) emerging from the laser sources (17) overlap at the connecting section (4) or at the connecting region (15) of the parts (1, 3, 12, 13).

Abstract: An induction connecting sleeve for connecting weldable thermoplastic elements by means of fusion, with at least two sockets for the insertion of connection sections of the thermoplastic elements to be connected, and with an induction heating element embedded in the sockets, with operative sections of the induction heating element surrounded completely by a weldable thermoplastic material, and with the induction heating element arranged coaxially to the sockets. The induction heating element may be manufactured of metallic material with spring characteristics and to embed it under pre-tension in the thermoplastic material of the sockets. When the induction heating element is heated and the thermoplastic material of the socket of the induction connecting sleeve is plasticized, the induction heating element relaxes which causes radial pressure to build towards the connection section.