Method and device for moisture profiling

A method for moisture profiling of a fibrous material web to be dried comprising:

• conveying a fibrous material web past at least one electromagnetic wave source comprising at least two electrodes of different polarity;
• subjecting the fibrous material web to electromagnetic waves from the at least one electromagnetic wave source;
• and
• drying moister areas of the fibrous material web more intensely than dried areas of the fibrous material web, the drying caused by the electromagneticwaves.

A device for moisture profiling of a fibrous material web to be dried in machines for at least one of manufacturing and refining this web comprising:

• a fibrous material web support that supports travel of the fibrous material web;
• a rotating cylinder, the rotating cylinder receiving the fibrous material web from the fibrous material web support, the fibrous material web support arranged outside the fibrous material web in relation to the surface of the rotating cylinder;
• and
• at least one electromagnetic wave transmitter comprising at least two electrodes at different polarities, the rotating cylinder conveying the fibrous material web past the at least one electromagnetic wave transmitter, the electromagnetic wave transmitter producing electromagnetic waves laterally to the material fibrous web, the electromagnetic waves balancing out moisture variances laterally to the fibrous material web by drying moister areas of the fibrous material web more intensely than dried areas of the fibrous material web.

A device for moisture profiling of a fibrous material web to be dried in machines for manufacturing and/or refining this web comprising:

• a fibrous material web support that supports travel of the fibrous material web;
• a rotating cylinder, the rotating cylinder receiving the fibrous material web from the fibrous material web support, the fibrous material web support arranged outside the fibrous material web in relation to the surface of the rotating cylinder;
• and
• at least one electromagnetic wave transmitter, the rotating cylinder conveying the fibrous material web past the at least one electromagnetic wave transmitter, the electromagnetic wave transmitter producing electromagnetic waves laterally to the material fibrous web, the electromagnetic waves balancing out moisture variances laterally to the fibrous material web by drying moister areas of the fibrous material web more intensely than dried areas of the fibrous material web,
• wherein the fibrous material web support comprises at least one wire whose material does not absorb the electromagnetic waves as well as the fibrous material web.

A device for moisture profiling of a fibrous material web to be dried in machines for manufacturing and/or refining this web comprising:

• a fibrous material web support that supports travel of the fibrous material web;
• a rotating cylinder, the rotating cylinder receiving the fibrous material web from the fibrous material web support, the fibrous material web support arranged outside the fibrous material web in relation to the surface of the rotating cylinder;
• and
• at least one electromagnetic wave transmitter, the rotating cylinder conveying the fibrous material web past the at least one electromagnetic wave transmitter, the electromagnetic wave transmitter producing electromagnetic waves laterally to the material fibrous web, the electromagnetic waves balancing out moisture variances laterally to the fibrous material web by drying moister areas of the fibrous material web more intensely than dried areas of the fibrous material web,
• wherein the rotating cylinder has an outer cover composed of a material that does not absorb the electromagnetic waves as well as the fibrous material web.