Process for regulating the breaking length ratio of a manufactured paper web

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/QCURR of the web, comparing the current bre...

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Bibliographische Detailangaben
Hauptverfasser:	RUF WOLFGANG, HEISSENBERGER OTTO L
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES FOR PAPER-MAKING MACHINES CALENDERS METHODS OF PRODUCING PAPER THEREON PAPER-MAKING PAPER-MAKING MACHINES PRODUCTION OF CELLULOSE TEXTILES
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Beschreibung
Zusammenfassung:	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/QCURR of the web, comparing the current breaking length ratio L/QCURR with a preset breaking length ratio L/QSET, determining a deviation between L/QCURR and L/QSET, 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/QCURR of the web, and a regulating device for changing the microturbulence, wherein the microturbulence is adjusted to change the L/QCURR.