Plastic article or earthenware shaping or treating: apparatus – Stock pressurizing means operably associated with downstream...
Reexamination Certificate
2006-07-07
2008-08-26
Gupta, Yogendra (Department: 1791)
Plastic article or earthenware shaping or treating: apparatus
Stock pressurizing means operably associated with downstream...
C425S461000, C222S390000, C222S391000
Reexamination Certificate
active
07416400
ABSTRACT:
The present invention provides a clay extruder having a reinforced plunger for shaping clay into desired patterns. The extruder has a screw disposed within a sleeve, a reinforced plunger located on the screw and inside the sleeve, a handle located on the screw and outside of the sleeve, and a perforated disk opposite the insertion of the screw into the sleeve. The handle is used to turn the screw and move the plunger through the sleeve. As the plunger pushes clay out the sleeve, an o-ring around the plunger prevents clay from leaking back, and a perforated disk molds the clay into a desired pattern. Metal construction and a thicker side of the plunger allow the extruder to be subjected to high amounts of torque and pressure without damage or failure.
REFERENCES:
patent: 1318928 (1919-10-01), Shields
patent: 2420616 (1947-05-01), Palmer
patent: 2955530 (1960-10-01), Nilo
patent: 3984033 (1976-10-01), Groth et al.
patent: 4456450 (1984-06-01), Heling
patent: 5183671 (1993-02-01), Perez
patent: 6439274 (2002-08-01), DeBoisblanc
D Ewald Maria Veronica
Gupta Yogendra
Pingel G. Brian
Sino Harvest Limited
Urban Camille L.
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