Plastic article or earthenware shaping or treating: apparatus – Stock pressurizing means operably associated with downstream... – Including auxiliary shaping means associated with molding...
Reexamination Certificate
2007-01-16
2007-01-16
Del Sole, Joseph S. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Stock pressurizing means operably associated with downstream...
Including auxiliary shaping means associated with molding...
C425S461000, C425S467000, C264S177120
Reexamination Certificate
active
10229019
ABSTRACT:
An extrusion die for extrusion molding of a honeycomb structure has back holes for introducing a raw material to be molded and slits for extruding the raw material. The extrusion die comprises an inside section, an outer peripheral section, and an outermost peripheral section; the width of the slit14disposed in the outer peripheral section is wider than the width of the slit disposed in the inside section; and when the surface roughness (Ra) of the slits in the inside section and the outer peripheral section is 0.1 μm or smaller, or when the surface roughness (Ra) of the slits in the inside section and the outer peripheral section exceeds 0.1 μm, the relationship between the surface roughness a of slit in the inside section and the surface roughness b of slit in the outer peripheral section satisfies the condition that 0.1<a/b<10.
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Belgian International Search Report, BE200200545, published Sep. 9, 2003.
Miyazaki Makoto
Okada Koji
Del Sole Joseph S.
NGK Insulators Ltd.
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