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AssigneeAgfa-Gevaert
InventorWilfried Beck
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The invention relates to an apparatus and to a method for removing thickenings in layers which are produced transversely to the direction of travel of the web after the coating of continuously moving webs with liquids whereby the coated web is deflected by a web guide element and two air jets pointing towards each other are directed to a small angle .alpha. towards the layer of the web from below the deflecting point as air blades which are actuated when thickenings appear in the layer and which scrape off the particles of the thickening and blow them into a vacuum tank which is sprinkled all over with water and the water and particles are supplied to a vacuum generating device which, in turn, is evacuated by a jet suction device without interrupting the vacuum.
An apparatus for removing thickenings in layers which are produced transversely to the direction of travel of a web during the coating of photographic film and paper webs with photographic emulsions and layers by means of air blade and air jet and carry out the excess coating material by means of vacuum and water flushing, characterized in that a deflecting element for deflecting the web is arranged downstream of the coating device for the web at a distance from the coating point at which the normal coating is already dry, in that two air blades and air jets pointing toward each other at angles .alpha..sub.1, .alpha..sub.2, to the layer of the web are provided on the approach side and the delivery side of the web to and from the deflecting element respectively and extends over the entire width of the web and is pivotal about an axis and in that there is provided beneath the air blades a vacuum tank into which the blown-off particles of layer can be drawn and from which the particles can be discharged.
A method for removing thickenings in layers which are produced transversely to the direction of travel of the web on the web during the coating of photographic film and paper webs with photographic emulsions and layers, characterised in that the coated web is deflected by a web guide element and two air blades and air jets pointing towards each other are directed at a small angle .alpha. towards the layer of the web from below at the deflecting point which are actuated when thickenings appear in the layer and which scrape off the particles of the thickening in the layer and blow them into a vacuum tank which is sprinkled all over with water and which receives the particles, and the mixture of air, water and particles is supplied to a vacuum generating device which, in turn, is evacuated continuously by a jet suction device without interrupting the vacuum.
Dependencies are inferred from the claim text.