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. 26, 2001
Filed:
Feb. 14, 2000
Wolfgang Ruf, Herbrechtingen, DE;
Otto L. Heissenberger, Pottenbrunn, AT;
Voith Sulzer Papiertechnik Patent GmbH, Heidenheim, DE;
Abstract
A process and apparatus for controlling a breaking length ratio L/Q of a web. The process includes providing a fluid fiber layer using a headbox havng a headbox nozzle, producing a web from the fluid fiber layer, measuring a current breaking length ratio L/Q,of the web, comparing the current breaking length ratio L/Q,with a preset breaking length ratio L/Q,, determining a deviation between L/Q,and L/Q,, and adjusting a microturbulence in a vicinity of said headbox nozzle to change the deviation. The apparatus includes a machine having a headbox, the headbox has at least one headbox nozzle, at least one mechanism is used for influencing a microturbulence of a stock suspension flowing out of the headbox nozzle, at least one measuring device is used for measuring a current breaking length ratio L/Q,of the web, and a regulating device for changing the microturbulence, wherein the microturbulence is adjusted to change the L/Q,.