| 摘要 |
A method of depositing a slug of striped food material comprises sucking a plurality of independent flows of different viscous fluid food (different in colour and/or composition) material into a cylinder (7) of a depositor assembly through respective circumferentially-spaced inlets (16) to the cylinder, preventing reverse flow through said inlets, and then urging the resulting charge of material in the cylinder out of the cylinder through a common outlet (9) so as to extrude the charge into a slug. A plurality of supply passages (11, 12, 13, 14) for the different viscous fluid food material connects respective reservoirs (2, 3, 4, 5) for the food materials to the respective cylinder inlet ports (16), a piston (15) being reciprocable in the cylinder, and piston drive means reciprocating the piston. An outlet valve (10') controls flow through the outlet port (9), and inlet valve means (15') controls flow through the inlet ports. The outlet valve can be a one-way valve (10'), and the inlet valve means can be constituted by an edge (15') on the piston (15) which is so arranged as to uncover the inlet ports (16) as the piston approaches a fully retracted position. Some blending of the adjacent streams where they contact one another in the cylinder can produce intermediate stripes of material in the deposited slug.
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