Method and an installation for subjecting carbon fabrics to...

Details Method and an installation for subjecting carbon fabrics to... Method and an installation for subjecting carbon fabrics to...

2006-05-30

2006-05-30

Colaianni, Michael P. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Treating shaped or solid article

To remove entrained material from article

C264S340000, C264S345000, C423S447100, C423S447200, C423S44500R, C423S460000

Reexamination Certificate

active

07052643

ABSTRACT:
Heat treatment is performed on preforms placed in an enclosure accompanied by sweeping with an inert gas under reduced pressure, and with a gaseous effluent being exhausted continuously via a first effluent outlet connected to an effluent exhaust circuit. At the end of the heat treatment, the first gaseous effluent outlet is closed so as to isolate the effluent exhaust circuit from the enclosure, sweeping of the enclosure with the inert gas is interrupted, and the heat-treated preforms are left in the enclosure and are subjected to densification by admitting a reagent gas into the enclosure via at least one reagent gas admission duct opening out into the enclosure, with gaseous effluent being exhausted via a second effluent outlet separate from the first, said second outlet being closed during the heat treatment step. Advantageously, metal, in particular sodium, contained in the gaseous effluent exhausted from the enclosure during the heat treatment step is neutralized.

REFERENCES:
patent: 4913736 (1990-04-01), Gimzeski
patent: 5154776 (1992-10-01), Bloch
patent: 5773122 (1998-06-01), Lennox et al.
patent: 6109209 (2000-08-01), Rudolph et al.
patent: 2001/0051127 (2001-12-01), Morita et al.
patent: 0 832 863 (1998-04-01), None
patent: 1 063 318 (2000-12-01), None
patent: WO 96/15285 (1996-05-01), None

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