Patent ID: 6042466
Filing Date: 2000-03-28
Classification: A22C

Abstract:
An extrusion nozzle for co-extruding a core of a first extrudable food substrate, with one or more contiguous outer layers of the same or different extrudable food substrates disposed wholly or partly around the core, wherein at least one of the outer layers comprises of a fibrous meat or fat emulsion; said extrusion nozzle comprising a first inner extrusion conduit for extruding said first substrate therethrough and one or more outer extrusion conduits disposed wholly or partly around the inner conduit for coextruding said one or more outer layers with the core; wherein at least one of the outer conduits which is for extruding said fibrous fat or meat emulsion defines a fluid flow path having a first narrow portion of relatively small cross-sectional area followed by a second enlarged portion downstream of said narrow portion, which enlarged portion has a relatively large cross-sectional area, the arrangement being such that when the meat or fat emulsion passes successively through the narrow portion to the enlarged portion, the fibres within the emulsion become disoriented, thereby increasing cohesiveness of the extruded emulsion.