Slit nozzle for coating trips of material, especially paper or board strips, with a pigment coating
AssigneeJagenberg Papiertechnik GmbH
InventorsIngo Becker, Reinhard Knop, Bernd Bohnenkamp
Life of this patent
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Abstract
A slot nozzle for coating webs of material, for example, paper, paperboard, cardboard, with a flowable coating substance, for example, a pigment coating, has a slot shaped outlet channel to which a distribution chamber extending over the width of the web is connected. A plurality of supply conduits are connected to the distribution chamber in spaced relationship across the width of the web and the length of the outlet channel and each supply conduit has a valve for adjusting the volume flow of the coating liquid. A respective diffuser is provided between each supply conduit and the distribution chamber and widens in the direction of the latter.
Claims14
A slot nozzle for coating a web of material with a flowable coating substance, said slot nozzle comprising:
- a slot-shaped outlet channel extending over the width of the web;
- a distribution chamber extending over said width and communicating over said width with said outlet channel;
- a plurality of supply conduits connected to said distribution chamber and spaced apart along said distribution chamber and across said width, for supplying the flowable coating substance to said distribution chamber, each of said supply conduits being provided with a device for adjusting a volume flow of the coating substance through the respective conduit to said distribution chamber;
- and
- a respective diffuser connecting each of said supply conduits to said distribution chamber and widening in a direction thereof.
A slot nozzle for coating a web of material with a flowable coating substance comprising:
- a nozzle body forming a slot-shaped outlet channel extending over a width of said web;
- a distribution chamber extending over said width and communicating over said width with said outlet channel;
- a plurality of supply conduits connected to said distribution chamber and spaced along said distribution chamber across said width of said web;
- and
- a respective device for each supply conduit for adjusting a volume flow of said coating substance through the respective supply conduit to the distribution chamber, said nozzle body being composed of two parts, each having a surface ground inner surface, said distribution chamber being formed as a groove in one of said parts, a flat member being inserted between said inner surfaces of said parts above said distribution chamber for maintaining a gap between said surfaces below said distribution chamber to form said outlet channel.
Dependencies are inferred from the claim text.