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AssigneeAndritz Kusters GmbH
InventorsEduard Davydenko, Andreas Pesch
Estimating the term…
Method and apparatus for applying a treatment substance to a running paper or board web comprising an applicator with at least one free-jet nozzle having an outlet gap for applying the treatment substance, being a machine-width, film-like jet, to a moving substrate, in particular at least one applicator roll which transfers the treatment substance to the paper or board web in a treatment nip defined by the at least one applicator roll with a counter element, wherein the free-jet nozzle is positioned at an angle to the moving substrate in such a way that an angle φ to the perpendicular of an impingement line of the coating on the moving substrate is between 5° and 85°, and the intensity of the jet impulse at the impingement line is increased by a gravitational acceleration of the jet caused by an adjustable effective height H from the outlet gap of the free-jet nozzle, and a jet curvature along a path length is modulated via the angle φ.
Method for applying a treatment substance to a running paper or board web comprising an applicator with at least one free-jet nozzle having an outlet gap for applying the treatment substance, being a machine-width, film-like jet, to a moving substrate, in particular at least one applicator roll which transfers the treatment substance to the paper or board web in a treatment nip defined by the at least one applicator roll with a counter element, wherein the free-jet nozzle is positioned at an angle to the moving substrate in such a way that an angle φ to the perpendicular of an impingement line of the coating on the moving substrate is between 5° and 85°, and the intensity of the jet impulse at the impingement line is increased by a gravitational acceleration of the jet caused by an adjustable effective height from the outlet gap of the free-jet nozzle, and a jet curvature along a path length is modulated via the angle φ.
Apparatus for applying at least one liquid or pasty treatment medium by means of a free-jet applicator to a moving substrate, the substrate being, in the case of direct application, the surface of a paper, board or other fibrous web and, in the case of indirect application, the surface of a transfer element, in particular an applicator roll, which transfers the treatment medium to the surface of the fibrous web, in particular in a treatment nip, and the free-jet applicator having at least one free-jet nozzle which has an outlet gap for discharging a medium jet, which has a free-jet nozzle that transfers the medium jet in a film-like manner onto the surface of the substrate and achieves a desired width of an application layer there in an impingement line, wherein an apparatus for adjusting the intensity of the jet impulse of the medium jet is arranged in the line of impingement, the apparatus being designed as a positioning system for positional and angular shiftings of the free-jet nozzle relative to the substrate, a reference direction for describing the instantaneous spatial and angular position of the free-jet nozzle relative to the line of impingement being given by the gravitational field.
Dependencies are inferred from the claim text.