Method for determining the coating weight on a web of material
The method involves detecting radiation, which is directed on a material web with a coating (8), after its interaction in different frequency bands, for producing specific measuring signals for the bands. The bands comprise a frequency that is common for all the bands. The bands are selected such th...
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | The method involves detecting radiation, which is directed on a material web with a coating (8), after its interaction in different frequency bands, for producing specific measuring signals for the bands. The bands comprise a frequency that is common for all the bands. The bands are selected such that one measuring signal is varied with the structure of the applied coating than the other measuring signal, with the same amount of the applied coating. The signals of the different frequency bands are mathematically linked with one another for determining the amount of the coating. Independent claims are also included for the following: (1) a method for controlling amount of coating, which is applied on a material web (2) a device for applying a coating on a moving material web. |
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