Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Reexamination Certificate
2007-10-02
2007-10-02
Johnson, Christina (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
C264S630000, C264S631000, C425S382400, C425S197000, C425S198000
Reexamination Certificate
active
10651553
ABSTRACT:
A method is provided for manufacturing a thin-walled honeycomb ceramic substrate by extruding a plasticized ceramic batch material through a filter screen having wedge shaped filter wires to remove foreign particulate and agglomerated batch material. The filter wires are supported by a set of support wires attached substantially perpendicular to the filter wires. The support wires are may also be advantageously wedge shaped. The filter screen of the present invention may have a wear resistant layer at the surface of the screen, typically a boride or a nitride. The wear resistant coating may also be a nickel-based coating.
REFERENCES:
patent: 2684919 (1954-07-01), Berry et al.
patent: 3885977 (1975-05-01), Lachman et al.
patent: 3888963 (1975-06-01), Orso et al.
patent: 4551295 (1985-11-01), Gardner et al.
patent: 4574459 (1986-03-01), Peters
patent: 4839120 (1989-06-01), Baba et al.
Merriam-Webster's Collegiate Dictionary, tenth edition, Merriam-Webster, Inc., 1998, pp. 435.
www.johnsonscreens.com; Screen Construction.
Able Kevin M.
Corning Incorporated
Daniels Matthew J.
Johnson Christina
Sterre Kees van der
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