Device for applying a treatment liquid to a web
AssigneeKusters Zittauer Maschinenfabrik GmbH
InventorsIngo Lison, Peter Pfeiffer, Steffen Greif
Life of this patent
Estimating the term…
Abstract
An application device having a trough tapering downward in a wedge shape, through which a web is guided vertically from top to bottom, and which is sealed at the lower end by means of a horizontal hose. The hose abuts against the web from one side, while the web slips along on the opposite side at the lower end of the side surface of the trough. The side surface is formed on a counter-bearer, which is concave at its lower side, so that a deflection roller arranged beneath it can be set as high as possible, and the free web section from the hose gap to the contact point on the deflection roller is as short as possible.
Claims13
A device for simultaneously applying treatment liquid to both sides of a web, comprising:
- a trough extending over the width of the web, said trough having fixed side surfaces that, when viewed in a vertical plane transverse to the width of the web, present a cross-section that tapers from a top portion of said trough downwardly in a wedge shape to a wedge tip formed in a bottom portion of said trough, the side surfaces being wider than the web and having ends that are connected to cross-walls forming a liquid-tight seal with respect to the side surfaces, wherein one of the side surfaces is the wall of a counter-bearer and has, at its lower end, a closed smooth section of the wall defining a contact region against which the web can be pressed;
- a horizontally disposed hose which is arranged in a region of the wedge tip in an open recess in one of the side walls, and which can be inflated in the direction of the counter-bearer, wherein only one of the side surfaces has the recess and the hose contained therein;
- a device for supplying treatment liquid to the trough;
- a web guidance device for guiding the web vertically downward from the top of said trough to a gap between the hose and the wall of the counter bearer, the web being pressed in place between the hose and the opposite side surface of the trough, and the trough being sealed toward the bottom, wherein the hose cooperates with the wall of the counter bearer such that the web is wiped by the hose as it passes the hose to a specific charge of treatment fluid, which can be selected in accordance with the inflation pressure of the hose;
- and
- a deflection roller having an outer working surface, the deflection roller being arranged below the counter-bearer and providing a surface against which the web is guided vertically downward out of the hose gap and against which the web laterally rests, wherein the counter bearer has a lower side that is positioned adjacent the deflection roller so as to minimize distance between where the web contacts the hose and then the deflection roller.
Dependencies are inferred from the claim text.