Article: Swiss Inventors Develop Traveling Web Boundary Air Layer Stripping Apparatus

ALEXANDRIA, Va., Feb. 19 -- Rolf Metzger of Dietlikon, Switzerland, Luca Frediani of Zurich, Switzerland, Bruno Holtmann of Dielsdorf, Switzerland, and Hans Hardegger of Greifensee, Switzerland, have developed an apparatus for stripping a boundary air layer from a traveling web.

According to the U.S. Patent & Trademark Office: "A web to be coated travels over a deflecting roll and underneath a slot nozzle from which a curtain of a coating material falls. A suction box open toward the roll and web has upstream and downstream ends and extends full axial length of the roll. An upstream seal on the upstream side of the box is juxtaposed with the web, extends the full axial length of the ...

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