METHOD FOR PRODUCING A PERMANENT CONNECTION OF THE ENDS OF AT LEAST TWO ALREADY FINISHED METAL TUBES, PARTICULARLY FOR THE MANUFACTURE OF A BICYCLE FRAME AND A FRAME THUS MANUFACTURED

摘要

A method for the permanent connection of the ends of at least two already finished metal tubes, particularly for the manufacture ofa bicycle frame, consisting in placing the ends of the tubes and a metal insert in the correct relative positions in a mould, particularly an injection moulding mould, whereby the tube ends abut against the metal insert, closing the mould around the ends of the tubes and filling the mould with liquid plastics material, so that after the setting of the plastics material and the opening of the mould the ends of the tubes are joined together by a lug of plastics material with therein a metal insert.