INFRARED DRYER WITH AIR PURGE SHUTTER

A combination infrared/air convection dryer or oven for travelling webs. A shutter assembly (40) is provided between the infrared radiation source (17) and the moving web in order to selectively expose the web to infrared radiation, and to create a sealed air chamber (19) when in the closed position...

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Bibliographic Details
Main Authors ROGNE, ALLAN WALLACE, QUASS, JEFFREY DONALD
Format Patent
LanguageEnglish
French
Published 09.12.2008
Subjects
BLASTING
DRYING
DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
HEATING
LIGHTING
MECHANICAL ENGINEERING
METHODS OF PRODUCING PAPER THEREON
PAPER-MAKING
PAPER-MAKING MACHINES
PRODUCTION OF CELLULOSE
TEXTILES
WEAPONS
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Summary:A combination infrared/air convection dryer or oven for travelling webs. A shutter assembly (40) is provided between the infrared radiation source (17) and the moving web in order to selectively expose the web to infrared radiation, and to create a sealed air chamber (19) when in the closed position. Enhanced drying of the web and/or a coatin g on the web at high speed is achieved without a concomitant increase in dryer length. When the drying atmosphere has a high concentratio n of solvent, exposure of that atmosphere to the heating elements, which can cause explosions, is eliminated by actuation of the shutters. In a preferred embodiment of the invention, air bars are used to floatingly support the moving web to avoid contact of the web with dryer elements.
Bibliography:Application Number: CA20002370625