The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 10, 2008
Filed:
Sep. 17, 2004
Thomas Ischdonat, Bachhagel, DE;
Ralf Pfifferling, Gerstetten, DE;
Rudolf Muench, Koenigsbronn, DE;
Michael Sollinger, Stuttgart, DE;
Wolfgang Ulfert, Tettnang, DE;
Thomas Ischdonat, Bachhagel, DE;
Ralf Pfifferling, Gerstetten, DE;
Rudolf Muench, Koenigsbronn, DE;
Michael Sollinger, Stuttgart, DE;
Wolfgang Ulfert, Tettnang, DE;
Voith Patent GmbH, Heidenheim, DE;
Abstract
An apparatus and a method for determining the permeability of a circulating band, in particular a water-absorbing dewatering band in a papermaking machine. The apparatus is equipped with a nozzle from which a measuring fluid flows onto or through the band. Fluctuations in the flow of the measuring fluid and in the nozzle exit pressure can distort the measurement of the permeability. The apparatus has a device for determining the speed of the band and/or a device for determining the nozzle exit speed and the nozzle exit pressure of the measuring fluid. These three measured variables are measured simultaneously, so that a fluctuation in one of these measured variables cannot impair the accuracy of the permeability measurement.