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AssigneeAgfa-Gevaert
InventorsG/u/ nther Koepke, Hans Frenken, Heinrich Bussmann, Kurt Browatzki
Estimating the term…
The stabilization of free-falling liquid curtains (4) in the coating of objects or webs (5) using curtain coaters is considerably improved by the use of curtain holders (9) from which an additional auxiliary liquid (11) issues towards and combines with the curtain (4), for laterally guiding the free-falling curtain (4) formed at the coating edge (3) of the coater. Triangular liquid bridges (14) are thus formed between the curtain (4) and the curtain holders (9) from the coating edge (3) to the point where the curtain (4) impinges on the layer support (5). The curtain holders (9) consist of tubular hollow bodies with a delivery spout (10) and a distributing passage (12) for the liquid (11) and an exit slot (13) or of a porous tubular material without any exit slot (FIG. 3).
A process for stabilizing free-falling liquid curtains which comprise one or more layers, in the curtain coating of webs of objects advancing continuously past a coating station, characterized in that the free-falling curtain formed at the coating edge of a coater is laterally guided by the use of curtain holders from which an additional liquid issues towards and combines with the curtain, triangular stabilizing liquid bridges between the curtain and the curtain holders being formed from the coating edge to the point at which the curtain impinges on the layer support.
A curtain coater incorporating a stabilizing system for the free-falling curtain for the single-layer or multiple layer coating of webs or objects advancing continuously past a coating station, characterized in that inwardly hollow curtain holders are arranged on both sides between the coating edge of the coater and the web for laterally guiding the curtain which are provided with a separate liquid supply and over the entire height with a distributing passage and a dispenser for dispensing the auxiliary liquid towards the curtain for the purpose of forming liquid bridges between the curtain and the curtain holders.
Dependencies are inferred from the claim text.