Plastic and nonmetallic article shaping or treating: processes – Outside of mold sintering or vitrifying of shaped inorganic... – Producing article having plural hollow channels
Reexamination Certificate
2007-11-13
2007-11-13
Mackey, James P. (Department: 1722)
Plastic and nonmetallic article shaping or treating: processes
Outside of mold sintering or vitrifying of shaped inorganic...
Producing article having plural hollow channels
C264S177120, C425S461000, C425S462000
Reexamination Certificate
active
11268598
ABSTRACT:
There is disclosed a die for forming a honeycomb structure and a method of manufacturing the honeycomb structure by use of the die, in which variations of cell pitches are suppressed in a central portion and the vicinity of an outer periphery after drying and firing an extruded honeycomb structure, and the honeycomb structure having a uniform cell pitch can be manufactured. A die1for forming a honeycomb structure has a front surface provided with groovy slits2formed between cell blocks3and a back surface provided with back holes4acommunicating with the slits2. The die1has a structure in which a pitch P of the adjacent cell blocks3is enlarged from a central portion of the front surface toward an outer periphery in a stepwise manner.
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Iida Tomohiro
Maeda Jiro
Wada Yukihisa
Bodawala Dimple N.
Mackey James P.
NGK Insulators Ltd.
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