Coater for coating material webs
AssigneeJagenberg Aktiengesellschaft
InventorReinhard Knop
Life of this patent
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Abstract
Coater for coating a material web, in particlular a paper web, guided along a backing roller, with a chamber for receiving the coating material, a doctor blade located where the web leaves the chamber, seen in the direction of travel of the material web, an adjustable overflow plate located at the front end of the chamber and with sealing members arranged in the edge region of the backing roller, covering the edges of the material web, comprising recesses extending in the direction of the web, edge scrapers extending in the direction of travel of the web from in front of the overflow plate to immediately in front of the doctor blade, with a channel and compressed air supply opening in the region of the overflow plate.
Claims10
In a coater for coating a material web, such as a paper web, including a backing roller for the web, a chamber for receiving coating material, a doctor blade disposed where the web leaves the chamber, and an overflow plate located at the front end of the chamber, the improvement which comprises a coating edge limiting means disposed in the chamber and located at an edge of the web and including recesses extending generally circumferentially of the roller and facing the roller, a means for supplying compressed air to the recesses, whereby the coating material is kept away from an edge of said web by the compressed air, and insulating plates laterally sealing the chamber.
Dependencies are inferred from the claim text.