Method and apparatus for manufacturing a fibrous material web
AssigneeVoith Paper Patent GmbH
InventorMichael Schwarz
Life of this patent
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Abstract
Process and apparatus for manufacturing a fibrous material web. The apparatus includes an automatic formation regulator, and the process includes on-line measuring of formation of the fibrous material web, utilizing the on-line measured formation as a controlled variable, and maintaining the formation at a preselectable target level via the automatic formation regulator.
Claims41
A process for manufacturing a fibrous material web in an apparatus having an automatic formation regulator, said process comprising:
- on-line measuring of formation of the fibrous material web;
- utilizing the on-line measured formation as a controlled variable;
- and
- maintaining the formation at a preselectable target level via the automatic formation regulator by changing an added quantity of at least one retention agent.
A process for manufacturing a fibrous material web in an apparatus having an automatic formation regulator, said process comprising:
- on-line measuring of formation of the fibrous material web;
- utilizing the on-line measured formation as a controlled variable;
- maintaining the formation at a preselectable target level via the automatic formation regulator;
- and
- wherein after the on-line measurement of the formation, the process further comprises:
- comparing the measured value to a target value;
- adjusting an added quantity of a first retention agent of a dual system to match the formation to the target value;
- and
- correcting one of an added quantity of a second retention agent and a ratio between the added quantities of the two retention agents to a point at which the formation begins to worsen.
An apparatus for manufacturing a fibrous material web comprising:
- an on-line measuring device structured and arranged to measure formation of the fibrous material web;
- an automatic formation regulator structured and arranged to receive the formation of the fibrous material web from said on-line measuring device as a controlled variable, and to maintained the formation at a preselectable target level;
- and
- a device for changing an added quantity of at least one retention agent,
- wherein the changing of the added quantity of the at least one retention agent maintains the formation at the preselectable target level.
A apparatus for manufacturing a fibrous material web comprising:
- an on-line measuring device structured and arranged to measure formation of the fibrous material web;
- an automatic formation regulator structured and arranged to receive the formation of the fibrous material web from said on-line measuring device as a controlled variable, and to maintained the formation at a preselectable target level;
- a device for comparing a measured formation value to a target value;
- a device for adjusting an added quantity of a first retention agent of a dual system to match the formation to the target value;
- and
- a device for correcting one of an added quantity of a second retention agent and a ratio between the added quantities of the two retention agents to a point at which the formation begins to worsen.
Dependencies are inferred from the claim text.