Method and apparatus for cutting slices from fish fillets with the skin still on
AssigneeTrio Industrier AS
InventorRagnar Eide
Life of this patent
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Abstract
The invention relates to longitudinal cutting of fish fillet pieces substantially parallel with the skin side (S) of the original fillet. This cutting in layers or slices takes place in that the fish fillet (F, F1) is brought into contact with a rotating cooled freezing drum (7, 7') which freezes the fillet (F2) at the skin side (S) and conveys it in retained position against the operative cutting edge of a driven, endless band knife (18). During the rotation of the drum (7, 7'), the operative cutting edge of the band knife (18) is displaced stepwise in relation to the drum circumference between two successive revolutions of the drum (7, 7'), in order to cut a fish meat slice (FS) successively for each drum revolution.
Claims8
A method for cutting slices from fish fillets with the skin still on, comprising feeding a fillet toward a rotatable freezing drum having a mantle face, the longitudinal direction of the fillet preferably being oriented in the circumferential direction of the drum causing the fillet to be frozen and retained to said drum at the fillet's skin side;
- providing a cutting tool, preferably in the form of a driven endless band knife, positioned at a (radial) distance from the mantle face of the drum;
- cutting a fish meat slice from the fillet adhering to the drum through freezing, the division plane thereof during the cutting-off operation extending substantially parallel with the drum circumference;
- and displacing said cutting tool's operative cutting edge stepwise in relation to the drum circumference between each revolution of the drum with the retained fillet, in order to successively cut further fish meat slices parallel with the first slice parallel with the two main faces of the original fillet resulting in, one slice for each drum revolution.
A machine for cutting slices from fish fillets with the skin still on, comprising an insertion place for a fish fillet;
- a freezing drum adapted to be frozen to a temperature beneath the freezing point of the fillet;
- an endless conveyor connected to said insertion place for conducting the fillet to said freezing drum;
- a cutting tool in the form of a driven endless band knife, the operative cutting edge thereof being radially spaced from the drum's mantle face;
- and a the suspension frame for the band knife being pivotally suspended around a horizontal axis on a bracket rigidly attached to the machine frame, and said suspension frame being operatively connected to an adjusting device adapted to change the swinging position/orientation of the band knife frame in the vertical plane stepwise around said horizontal axis, the effective distance between the operative cutting edge of the band knife and the drum mantle face being changed stepwise between each revolution of the freezing drum.
Dependencies are inferred from the claim text.