Abstract: A keyboard of pianos and similar key instruments which has a keyboard frame and a plurality of key arms which are mounted in the keyboard frame in such a way that the key arms only can swing in a plane that is perpendicular to the plane of the keyboard frame. The keyboard frame consists of metal and a vibration absorbing material is arranged between the bearing mechanisms on the key arms and the keyboard frame. This will make the manufacture of the keyboard cheaper and reduce the need of readjustments of the keyboard. The vibration absorbing material is provided in grooves in the keyboard frame, and the bearing means, which can consist of pins are fastened in the vibration absorbing material.

Abstract: A method of preparatory processing of mussles. The mussles are placed in an inner container which is positioned inside an outer container. The inner container has perforated walls and is equipped with perforated tubes which are spaced a certain distance apart. The mussles are heated to about 85.degree. C. inside the container while being maintained in compacted condition whereby they will be able to open to a minimum extent only. The mussles are then cooled and dry-frozen individually. The cooking (processing) liquid may be frozen in cubes, blocks or the like. The liquid is then used in the final preparation of the mussles prior to their consumption.