Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1976-12-13
1978-10-10
Camby, John J.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 4, 34 34, 34 41, 20415923, 250492R, B01K 500
Patent
active
041188730
ABSTRACT:
A method and apparatus for inerting the atmosphere adjacent a moving product surface such as a resin bearing web material includes passing the product through a device having entrance and exit tunnels and a treatment chamber therebetween at speeds up to 1,000 ft. per minute or greater. An inert gas flow is introduced into the entrance tunnel at a velocity relative to the velocity of the moving product surface such that a turbulent condition is established in the boundary layer of air dragged into the entrance tunnel by the moving product. Turbulence in the boundary layer promotes the rapid diffusion of atmospheric oxygen upwardly away from the moving product surface. The inert gas flow is of a magnitude sufficient to maintain oxygen concentration at the tunnel entrance at less than 20.8% thereby enabling such diffusion of oxygen. For slowly moving product surfaces, a high velocity cross flow inert gas stream is provided to establish a resultant relative velocity capable of generating the requisite turbulence.
REFERENCES:
patent: 3654459 (1972-04-01), Coleman
patent: 3676673 (1972-07-01), Coleman
patent: 3936950 (1976-02-01), Trove
Airco, Inc.
Bopp Edmund W.
Camby John J.
Cassett Larry R.
Rae David L.
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