Apparatus for achieving and maintaining an oxygen-deficient iner

Details Apparatus for achieving and maintaining an oxygen-deficient iner Apparatus for achieving and maintaining an oxygen-deficient iner

1991-07-17

1992-10-13

Housel, James C.

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

Control element responds proportionally to a variable signal...

422110, 422119, 422121, 422124, 118 65, 118 68, 1563809, 219388, G05D 700, B05C 1100

Patent

active

051548925

ABSTRACT:
A method and apparatus are disclosed for achieving and maintaining an inert atmosphere as oxygen-deficient as possible in a treatment chamber, having a reaction zone, particularly an irradiation chamber, traversed by a length of material, wherein the length of material is supplied to the chamber through an inlet channel and conducted from the chamber through an outlet channel. A circulating inert gas stream, which detaches the entrained gas boundary layer held by the material, is moved countercurrently to the length of material in the inlet channel and is supplemented in a controlled manner with fresh inert gas in such amount that a given maximum oxygen concentration is not exceeded in the reaction zone and the flow rate of the inert gas stream is controlled, so that the pressure before the exit gap of the outlet channel is the same or slightly higher than the surrounding pressure.

REFERENCES:
patent: 3559965 (1971-02-01), Ishida
patent: 4336279 (1982-06-01), Metzger
patent: 4442143 (1984-04-01), Reed
patent: 4444814 (1984-04-01), Flinchum et al.
patent: 4508750 (1985-04-01), Foll et al.
patent: 4636405 (1987-01-01), Mensal et al.

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