Patent ID: 7431876
Filing Date: 2008-10-07
Classification: A61M,B29C,B29K,B29L

Abstract:
1. A method for one-piece injection moulding of a soft needle catheter having a hub and a tube-shaped flexible part both formed by said one-piece injection moulding, comprising the steps of: feeding a molten polymer into a mould having a core which is used to form an interior of said catheter, the mould and the core together defining a hub cavity to form said hub and a tube-shaped cavity to form said tube-shaped flexible part; said feeding step including using a core having a cone-shaped part that extends from the hub cavity into the tube-shaped cavity and a cylindrical part extending from a distal end of said cone-shaped part to create within said tube-shaped cavity a tube-shaped flexible part having a cylindrical portion formed distal from said hub and a cone-shaped portion extending between said hub cavity and said cylindrical portion; removing the core from the catheter when the polymer has been sufficiently cured for the core to be removed; and removing the one-piece injection moulded soft needle catheter from the mould when the polymer has been sufficiently cured to be removed.