| 摘要 |
<p>Processes and apparatus for the mechanical separation of a combination of meat and bone into useful fractions, the combination being conveyed by a screw (48) of new cross-section profile through a screen (64), which comprises a portion of an elongated cylindrical conduit, softer components, i.e. the meat, being expressed through the screen (64), while harder components, i.e. the bone, are contained by the screen and fed out of the conduit. The screen (64) is constituted by alternate flat and configured annular discs, the latter providing the necessary large plurality of small apertures through which the softer components can be expressed. The screw (48) is designed to develop a radially-outward pulsing action of the combination against the interior wall of the screen to produce the desired separation at a lower pressure than with prior art apparatus and minimisation of shear of the combination against the screen interior wall. The apparatus is provided with a spring controlled throat that permits automatic control of the pressure applied to the separating combination of meat and bone, and that also permits adjustment of that pressure to suit the type of meat in the combination that is being separated. </p> |
