Patent ID: 7390375

Claim:
A method for connecting a flexible plastic line ( 6 ) to a plastic socket ( 5 ) with an inside diameter (D 3 ), which line has an outside diameter (D 1 ), in the case of which method an end part of the line is heated, after which the heated line part is pushed into the socket and cools down there to form a thermal connection ( 16 ), characterized in that the method comprises the steps of: contactlessly heating the end part of the line, in which case the heat transfer is substantially homogeneous around the circumference of the end part; curling over a head end ( 9 ) of the end part in an outward direction, prior to insertion of the end part into the socket, so that a flange with a diameter that is greater than the inside diameter (D 3 ) of the socket is formed; and inserting the head end ( 9 ) of the line ( 6 ) into the socket ( 5 ), in which case wall material of the inside wall of the socket is pushed up in an inward direction to a position situated at a distance (L) from an end face of the socket, as a result of which a liquid-tight connection ( 16 ) is formed by the curled-over head end of the line and pushed-up wall material of the socket, wherein prior to the insertion of the end part of the line into the socket a heating element ( 20 ) is placed in the socket, for the purpose of heating the inside of the socket, and wherein an annular groove ( 29 ) is formed by the heating element ( 20 ) in the socket ( 5 ), for the accommodation of the curled-over head end ( 9 ) of the line ( 6 ).