#$%^&*AU2015207950B220161222.pdf#####TENSIONED OPENING DEVICE FOR MONOMER CONTAINER ABSTRACT The invention relates to an opening device for the opening of a monomer liquid container (1) comprising a positioning aid (6) for positioning of the monomer liquid container (1), an opening facility (8) for the opening of the monomer liquid container (1), whereby the opening facility (8) is supported such as to be mobile with respect to the positioning aid (6) and/or the positioning aid (6) is supported such as to be mobile with respect to the opening facility (8), and at least one elastically deformable energy-storing element (9) for storage of elastic energy, whereby a motion of the opening facility (8) and/or a motion of the positioning aid (6) can be driven by the elastic energy of the at least one elastically deformable energy-storing element (9), and the monomer liquid container (1) can be opened by the motion of the positioning aid (6) with the monomer liquid container (1) and the opening facility (8) with respect to each other. The invention also relates to a vacuum mixing system having an opening device of this type and to a method for the opening of a monomer liquid container (1).1/7 16 9 24 8 12 6 2 1 3 6 4 7 22 23 18 24 14 20 Figure 1