A method and an arrangement for successively feeding batches into a mixing vessel under partial vacuum for the preparation of
bone cement. The arrangement includes an inner container communicating with the
atmosphere and with the mixing vessel, which container is so arranged as to enclose a glass
ampoule containing a liquid
bone cement component and, on the other hand, a device for opening the
ampoule so that its contents can be sucked into the mixing vessel under partial vacuum. An outer container encloses the inner container at least partially, and is arranged to communicate with the mixing vessel. The inner container, and the outer container, define a space filled with a proportional quantity of a second
bone cement component, which is in
powder form. The inner container is capable of displacement relative to the outer container between a first position, in which sections of the inner container prevent communication between the mixing vessel and the
atmosphere, and a second position, in which communication between both the mixing vessel and the
atmosphere is open, so that the powdered bone
cement component can be sucked into the
mixing chamber under vacuum. The feeding sequence of the bone
cement components is arbitrary. In other embodiments, the inner and outer containers are eliminated, or only the inner container is retained.