Plastic article or earthenware shaping or treating: apparatus – Means for molding powdered metal
Reexamination Certificate
2005-11-02
2009-06-16
Gupta, Yogendra (Department: 1791)
Plastic article or earthenware shaping or treating: apparatus
Means for molding powdered metal
C425S174600
Reexamination Certificate
active
07547204
ABSTRACT:
The present invention provides a nano-precision sintering system1for sintering a nano-sized powder of a material in the pulse energization and pressure sintering process to obtain a highly purified sintered compact having a nano-sized grain structure, said nano-precision sintering system1comprising: at least one pre-process chamber20defined by at least one sealed housing21having at least one glove and designed to be controlled into a predetermined atmosphere; a sintering process chamber30defined by a sealed housing31having at least one glove and designed to be controlled into a predetermined atmosphere; a shut-off system26disposed in a passage providing communication between the pre-process chamber and the sintering process chamber so as to block the communication between the two chambers selectively while keeping it in an air tight condition; and a pulse energization and pressure sintering machine50having a vacuum chamber “C” allowing for the sintering process to be carried out under a vacuum atmosphere, wherein the vacuum chamber is disposed in the sintering process chamber such that the former can be isolated from the latter.
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Nakagawa Katsuyuki
Suzuki Shin'ichi
Tokita Masao
Gupta Yogendra
Nguyen Thu Khanh T
SPS Syntex Inc.
Wenderoth , Lind & Ponack, L.L.P.
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