US Patent 7686922 Process and device for dewatering a fiber web

Patent 7686922 was granted and assigned to Andritz AG on March, 2010 by the United States Patent and Trademark Office.

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Patent

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Current Assignee

Andritz AG

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

76869220

Patent Inventor Names

Jörg Bauböck0

Paul Arnold0

Date of Patent

March 30, 2010

Patent Application Number

116496010

Date Filed

January 4, 2007

Patent Primary Examiner

‌

Mark Halpern

Patent abstract

A process and a device for dewatering a fiber web 3, especially a paper web, using vacuum. The vacuum seen by a given unit are of the web is pulsed between a maximum value V and a minimum value. At least one suction box 7 is provided with perforations beneath the running web where the vacuum is applied with a pulsating effect on the web.

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