Abstract: In order to produce a sink for insertion into a cut-out opening in a work top wherein the sink comprises an edge region which rests upon the work top in the installed state of the sink and wherein contaminants, crumbs for example, that are disposed on the upper surface of the work top outside the sink can be moved onto the edge region of the sink and then moved from there into the inner region of the sink that is surrounded by the edge of the sink in a particularly easy manner in the course of a cleaning process, it is proposed that the edge region of the sink be provided with a chamfer.

Abstract: In order to provide a movement mechanism for moving a closure element for the purposes of sealing a waste outlet opening, in particular in a sink or a washstand, which is adapted to be operated in a simple and reliable manner and permits of a large degree of flexibility in regard to the design of the sink and the connections to the sink or the washstand, it is proposed that the movement mechanism comprise an electrically operated drive element.

Abstract: Methods to fasten an installation element, in particular a sink, to the edge of a receiving opening for the installation element in a work surface are disclosed, wherein the installation element has at least one holding element, which enables the installation element to be fastened simply and quickly to the work surface. A disclosed method comprises: (a) arranging a variable-volume material on the installation element and/or on the holding element and/or on the work surface and/or between the installation element and the work surface; (b) arranging the installation element in the receiving opening of the work surface; (c) changing the volume of the variable-volume material, so that a clamping body is formed from the variable-volume material, which exerts a resultant force on the holding element of the installation element, which causes the installation element to be pulled towards the work surface.