EP0455767B1 — Process for the manufacture of a carrier or iud provided with a pulling element, and a carrier or iud provided with a pulling element

USPTO Abstract

Process for the manufacture of a intra-uterine device or IUD, provided with a pulling element. The IUD is an essentially T-shaped plastic element (1) with a middle leg (2). The thread is laid in the injection mould in the lengthwise direction of the middle leg (2) of the IUD. Then the mould is closed and the IUD is subsequently produced by injection moulding, following which the IUD is removed from the mould. The IUD is characterized in that the thread runs along the entire length of the IUD and the IUD is molded of resiliently flexible plastic material such as polyethylene and the thread is a single smooth thread made of another plastic material with a higher fusion temperature such as nylon, polypropylene. Preferably the IUD is a contraceptive of the coil type which is an essentially T-shaped plastic element (1), which T-shaped element has a middle leg (2) on which a so-called coil is wound, while cross pieces of the T-shape serve to hold the IUD in place with a thread fastened at the free end of the middle leg (2). This thread is single and the IUD is cast around it, for example by injection moulding.