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:
Feb. 26, 2013
Filed:
Feb. 10, 2012
Markus Häussler, Herbrechtingen, DE;
Hans Loser, Langenau, DE;
Volker Schmidt-rohr, Heidenheim, DE;
Wolfgang Ruf, Herbrechtingen, DE;
Thomas Ruehl, Wernau, DE;
Markus Häussler, Herbrechtingen, DE;
Hans Loser, Langenau, DE;
Volker Schmidt-Rohr, Heidenheim, DE;
Wolfgang Ruf, Herbrechtingen, DE;
Thomas Ruehl, Wernau, DE;
Voith Patent GmbH, Heidenheim, DE;
Abstract
A method for operating a sheet-forming unit of a papermaking machine. At least one fibrous material suspension is fed to a headbox and is conducted in a plurality of turbulence-generating channels to form sub-flows, and fed to a nozzle. From the nozzle, the at least one fibrous material suspension is in the form of a free jet into the forming unit to define an impingement line. In a final fluidization region of an individual turbulence-generating channel a pressure loss (Δp) of ≧50 mbar is generated within the fibrous material suspension before inlet thereof into the nozzle, and the fibrous material suspension is guided from the final fluidization region as far as the impingement line in such a way that the dwell time of the suspension in the region defined by the final fluidization region as far as the impingement line ranges from >30 ms to ≦300 ms.