Connecting device for pipes

A connecting device for pipes in printing systems, consisting of a housing part with a plug-in receptacle for receiving a to be inserted, in particular formed from an end portion of the pipe and a substantially cylindrical outer circumferential surface having plug portion, the plug-in section circumferentially sealed in the inserted state and locked by a holding member against withdrawal and wherein the holding element for locking the plug portion in its movement in the withdrawal direction with an opposite to the direction of insertion tapered inner conical surface of the housing part cooperates in such a way that it is at least pushed partially radially inwardly toward the outer peripheral surface of the plug portion, wherein the holding element in an extension the plug-in receptacle arranged and configured such that it non-positively or frictionally locking acts on the outer circumferential surface of the plug portion, wherein the holding element is designed as a ball cage and a plurality of spaced distributed over the circumference of a plug-in receptacle, constructed as having clamping balls clamp body, wherein the ball cage is radially slit and thereby designed to be elastically deformable in the radial direction, to ...