초록 ▼

An extrusion head has at least two preferably co-axial tubes, with an outer tube enclosing at least one inner tube. The end of the inner tube terminates in a flexible sleeve or tube which is supported by a plurality of hinged fingers distributed uniformly around the periphery of the inner tube. Doug

An extrusion head has at least two preferably co-axial tubes, with an outer tube enclosing at least one inner tube. The end of the inner tube terminates in a flexible sleeve or tube which is supported by a plurality of hinged fingers distributed uniformly around the periphery of the inner tube. Dough is driven under pressure through the outer tube and filling is driven under pressure through the inner tube. When an extrusion valve is closed at the end of the outer tube, the back pressure of the dough closes and folds the flexible sleeve, against the supporting fingers which it surrounds, thereby closing the filling tube and forming a coating of dough for the outer end of the next food product. When the extrusion valve next opens, the coating of dough and the filling are pushed out to extrude and form the outer end of the next encrusted food product. When enough dough and filling have been extruded, the extrusion valve closes to pinch off the extruding flow of dough and filling, in a manner which causes the trailing end of the extruding dough to cover the food product. Various modifications in the extrusion heads enable a great variety of food products to be formed.

대표청구항 ▼

An extrusion head for forming a filling within an outer shell, said head comprising at least an outer tube and an inner tube wholly contained within said outer tube, extrusion valve means for controlling the delivery of an extruded product from said outer tube, flexible sleeve means completely surro

An extrusion head for forming a filling within an outer shell, said head comprising at least an outer tube and an inner tube wholly contained within said outer tube, extrusion valve means for controlling the delivery of an extruded product from said outer tube, flexible sleeve means completely surrounding said inner tube for enabling a flow out said inner tube when said extrusion valve means is open and for folding over and closing said inner tube responsive to back pressure in said outer tube when said extrusion valve is closed and finger means hinged to the end of said inner tube for opening and closing with said flexible sleeve and for supporting said sleeve in both said open and closed positions, whereby said flow in said inner tube may be outwardly, but not inwardly.