Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Reexamination Certificate
2007-11-13
2007-11-13
Johnson, Christina (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
C264S177100, C264S171100, C425S380000
Reexamination Certificate
active
11153711
ABSTRACT:
A method for forming honeycomb structures, such as wall-flow honeycomb filters, which utilizes extrusion of multiple material supplies at once. Such methods may be used to form intermittent plugs or other structures in the cell channels during the extrusion process, for example. A die assembly is provided which includes secondary feedholes machined in the pins for intermittently or periodically injecting secondary material (e.g., plug material) into the cell channels of the honeycomb structure while it is being extruded.
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Dannoux Thierry Luc Alain
Fischer Michael
Ketcham Thomas Dale
Miller Kenneth Richard
Paisley Robert John
Corning Incorporated
Homa Joseph M.
Johnson Christina
Wayland Randall S.
Wollschlager Jeff
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