Plastic article or earthenware shaping or treating: apparatus – Means feeding fluent stock from plural sources to common... – Extrusion shaping means
Patent
1983-07-01
1984-09-04
Hoag, Willard E.
Plastic article or earthenware shaping or treating: apparatus
Means feeding fluent stock from plural sources to common...
Extrusion shaping means
994506, 4251331, B29D 300, B21C 304
Patent
active
044694750
ABSTRACT:
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.
REFERENCES:
patent: 2705463 (1955-04-01), Moore
patent: 4015518 (1977-04-01), Roth et al.
patent: 4251201 (1981-02-01), Krysiak
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