Patents by Inventor Hans Sundgvist

Hans Sundgvist has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Apparatus and method for regulating the profile of a paper web passing over a Yankee cylinder in an integrated IR-dryer/Yankee hood
    Patent number: 4942675
    Abstract: A method and apparatus for regulating the profile of a paper web passing over a Yankee cylinder in an integrated IR-dryer/Yankee hood (3,2), wherein the IR-dryer (3) is placed before the wet-end block of the Yankee cylinder. The amount of air leaking into the hood (2) through the gap between the hood (2) and the Yankee cylinder (1) is reduced by passing into this gap (h.sub.o) cooling air (5) warmed up in the IR-dryer (3) and taken from said IR-dryer (3).
    Type: Grant
    Filed: March 7, 1989
    Date of Patent: July 24, 1990
    Assignee: Valmet Paper Machinery, Inc.
    Inventor: Hans Sundgvist