Disk, wind instrument, counter piece, and method of producing the disk

A method of producing a disk for stabilising a pad assembly in the key cup for closure of a wind instrument tone hole, the method comprising:

• positioning a precursor disk in a key cup, the precursor disk comprising an integral body made of a disk material which is in a solid state at room temperature and in a malleable state at a predetermined temperature higher than the room temperature, a releasing material being optionally provided, preferably as a thin layer, between a bottom wall of the key cup and an upper surface of the precursor disk;
• positioning a counter piece in a tone hole of a wind instrument, a thin layer to retard a heat-transfer being optionally placed between a lower surface of the precursor disk and the counter piece and/or a releasing material being optionally provided, preferably, as a thin layer, between the lower surface of the precursor disk and an upper surface of the counter piece;
• closing the tone hole by the key cup with the counter piece being positioned between the tone hole and the key cup;
• heating the precursor disk to the predetermined temperature at which the disk material gets into a malleable state;
• pressing the key cup against the tone hole to reform the precursor disk into the disk;
• and
• cooling the disk to a temperature below the predetermined temperature so that the disk material gets into a solid state.