Institute of Paper Science and Technology, Inc.

Georgia Tech Research Corporation

Timothy F Patterson

David I Orloff

Isaak Rudman

Andrew M Krause

Charles C Habeger, Jr

Frederick W Ahrens

A microwave heater and/or dryer has a nonlinear or curvilinear relative slot profile geometry. In one embodiment, the microwave dryer has at least one adjustable field modifier making it possible to change the geometry of the heater or dryer when drying different webs. In another embodiment, the microwave dryer provides more uniform drying of a web when the field modifier is adjusted in response to a sensed condition of the web. Finally, a method of microwave heating and/or drying a web achieves a uniform heating and/or drying profile.

Geometry for web microwave heating or drying to a desired profile in a waveguide

A method and apparatus for drying a fiber web is provided by pressing the web, preferably by impulse drying and then introducing the web into a gas pressurized zone followed by reducing the pressure in the zone, the reduction preferably being effected with cooling of the fiber web.

Impulse dryer

Apparatus for drying a paper web at elevated ambient pressures

Method and apparatus for drying a fiber web at elevated ambient pressures

Growing community of inventors

Atlanta, GA, United States of America

Timothy F Patterson