2. Apparatus according to claim 1, comprising measuring chamber means having a total cross section substantially corresponding geometrically to the cross-sectional area of the bar, located to receive the end of the bar when forced there into by said piston, and arranged to move transversely to the bar to subdivide at least one portion of the foodstuff therefrom.

3. Apparatus according to claim 2, in which said measuring chamber means comprises a plurality of thin dividing walls located in planes parallel to the bar, and dividing the measuring chamber means into a plurality of measuring chambers.

4. Apparatus according to claim 2, in which said piston is arranged to maintain pressure on the bar during transverse movement of the measuring chamber means, to subdivide each portion of the foodstuff from the bar.

5. Apparatus according to claim 4, comprising pressure ejection means for applying pressure to eject each portion of the foodstuff from the measuring chamber means, the pressure ejection means being arranged to remain actuated until the measuring chamber means has been moved transversely back to receive a further portion from the end of the bar. Apparatus according to claim 1, in which said supply channel is a rectangular cross section to form rectangular dice and the wedge is shaped to form a portion of a flat wall section of said channel.