Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Patent
1975-08-28
1977-10-25
Camby, John J.
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
34156, 302 31, F26B 1320
Patent
active
040550036
ABSTRACT:
An apparatus is provided which is suitable for treating a web so as to modify the properties of the web. The apparatus includes a wall means which defines an elongated tunnel having an inlet end and an outlet end. Gas stream deflectors such as an array of spaced baffles, contoured surfaces, or the like, are positioned in the tunnel along opposing walls thereof. Two substantially parallel gas streams are passed through the tunnel in the direction of web travel. The gas streams flow on opposite sides of the web, impinge on the deflector means and oscillate and support the web. As each gas stream is deflected, it is directed against the web so that the web undergoes mechanical bending and oscillation which results in an alteration of bending stiffness, drape, feel and hand of the web.
A method for modifying the properties of the web contemplates providing a confined flow passageway having an inlet and an outlet, introducing the web into the passageway, introducing a pair of gas streams into the passageway only at the inlet end of the passageway, passing the gas streams through the passageway on each side of the web so that the web is supported by the gas streams and transported through the passageway, and periodically altering the direction of flow for each gas stream in the passageway so that each gas stream alternately impinges onto and deflects a portion of the web as the web is transported through the passageway.
REFERENCES:
patent: 559498 (1896-05-01), Scharrer
patent: 927995 (1909-07-01), Morrow
patent: 1560589 (1925-11-01), Andrews et al.
patent: 2037806 (1936-04-01), Little
Camby John J.
Johnson & Johnson
Schwartz Larry I.
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