Method and system for coating a web
AssigneeVoith Sulzer Papiermaschinen GmbH
InventorAnton Plomer
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Abstract
The invention is directed to a process and system for coating a traveling material web, especially paper or cardboard, with at least one liquid medium, in which the coating medium is conveyed to an applicator device with a spray nozzle fitted in a vacuum chamber to generate a spray mist. The spray mist is applied to the material web according to the invention in that it is applied to the outside of at least one roll and transferred to the material web from the roll.
Claims15
A method for coating a web with a coating mixture, comprising the steps of:
- providing a roll having a shell surface, said shell surface including a portion thereof which is adapted for contacting the web;
- providing an applicator system having a vacuum chamber, an inner chamber and a spray nozzle, said spray nozzle disposed within said inner chamber and said inner chamber disposed within said vacuum chamber, said inner chamber including a positive pressure therein and said vacuum chamber including a vacuum therein, said spray nozzle producing a spray mist of the coating mixture;
- directing the spray mist toward and applying the coating mixture to said shell surface;
- and
- transferring the coating mixture from the shell surface to the web.
In a machine for making or processing a web, a system for coating the web with a coating mixture, said system comprising:
- a roll having a shell surface, said shell surface including a portion thereof which is adapted for contacting the web;
- and
- an applicator system for applying the coating mixture to said shell surface, said applicator system including a vacuum chamber, an inner chamber and a spray nozzle, said spray nozzle disposed within said inner chamber and said inner chamber disposed within said vacuum chamber, said inner chamber including a positive pressure therein and said vacuum chamber including a vacuum therein, said spray nozzle producing a spray mist of the coating mixture which is directed toward and applied to said shell surface, wherein said shell surface is structured and arranged to transfer the coating mixture to the web.
Dependencies are inferred from the claim text.