Method and device for lacquering or coating of a substrate by a capillary slot
First Claim
Patent Images
1. A method for coating an underside of a substrate with a coating fluid, contained in a container and supplied to the underside of the substrate from the container via a capillary slot having an outlet opening by capillary action;
- said method comprising the steps of;
lifting the outlet opening of the capillary slot from a rest position, in which the outlet opening is submerged in the coating fluid, into a lifted position above the fluid level of the coating fluid;
moving the substrate and the outlet opening relative to one another reducing a distance between the substrate and the outlet opening to a first spacing wetting of the underside of the substrate with the coating fluid present at the outlet opening;
subsequently enlarging the first spacing to a second spacing sufficient for coating the underside of the substrate by capillary action;
moving the substrate across the capillary slot for coating the underside of the substrate.
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Abstract
A device for coating substrates with a capillary slot includes a component having a capillary slot with an outlet opening. A container filled with a coating fluid is provided. The component is positioned in the container such that the capillary slot communicates with the coating fluid and such that the coating fluid is supplied to the capillary slot. A device for moving vertically the outlet opening of the capillary slot relative to the container is also provided.
22 Citations
20 Claims
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1. A method for coating an underside of a substrate with a coating fluid, contained in a container and supplied to the underside of the substrate from the container via a capillary slot having an outlet opening by capillary action;
- said method comprising the steps of;
lifting the outlet opening of the capillary slot from a rest position, in which the outlet opening is submerged in the coating fluid, into a lifted position above the fluid level of the coating fluid; moving the substrate and the outlet opening relative to one another reducing a distance between the substrate and the outlet opening to a first spacing wetting of the underside of the substrate with the coating fluid present at the outlet opening; subsequently enlarging the first spacing to a second spacing sufficient for coating the underside of the substrate by capillary action; moving the substrate across the capillary slot for coating the underside of the substrate. - View Dependent Claims (2)
- said method comprising the steps of;
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3. A method for coating an underside of a substrate with a coating fluid contained in a container and supplied with a component comprising a capillary slot, the capillary slot having an outlet opening that, in a rest position of the component, is submerged in the coating fluid;
- said method comprising the steps of;
lifting the outlet opening of the capillary slot from the rest position into a lifted position above the fluid level of the coating fluid; lowering the underside of the substrate toward the outlet opening to a first spacing in order to effect wetting of the underside of the substrate with the coating fluid present at the outlet opening. - View Dependent Claims (4, 5)
- said method comprising the steps of;
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6. A device for coating an underside of a substrate by a capillary slot;
- said device comprising;
a component having a capillary slot with an outlet opening; a container filled with a coating fluid; said component positioned in said container such that said outlet opening of said capillary slot is submerged in a rest position of said component in said coating fluid; means for lifting said component from said rest position into a lifted position in which said outlet opening is above a fluid level of said coating fluid for coating the underside of the substrate and for lowering said component from said lifted position into said rest position. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- said device comprising;
Specification