Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Extrusion shaping means
Reexamination Certificate
2011-02-01
2011-02-01
Gupta, Yogendra N (Department: 1791)
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Extrusion shaping means
C425S133100, C425S462000
Reexamination Certificate
active
07878788
ABSTRACT:
A technique for extruding a strip of rubber having filaments embedded therein. The rubber is channeled to an extrusion orifice for forming the strip. The outline of the extrusion orifice presents first and second orthogonal planes of symmetry that intersect at a straight line that is substantially parallel to a direction in which the strip is extruded through the extrusion orifice. The channeling of the rubber can be done with an upstream main channel having the first plane as a plane of symmetry, and extended by two downstream secondary channels that are substantially symmetrical to each other about the first plane. The main channel and the two downstream secondary channels also have the second plane as a plane of symmetry.
REFERENCES:
patent: 4274821 (1981-06-01), Kiemer
patent: 2005/0147702 (2005-07-01), Higashi
patent: 29911930 (2001-01-01), None
patent: 0 820 848 (1998-01-01), None
Cohen Pontani Lieberman & Pavane LLP
Gupta Yogendra N
Luk Emmanuel S
Michelin Recherche ET Technique S.A.
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