Apparatus for drying a moisture-containing layer at one side of a running substrate
AssigneePagendarm GmbH
InventorAlbert Hebels
Life of this patent
Estimating the term…
Abstract
The uncoated side of a running web-shaped substrate, the other side of which carries a layer containing an evaporable solvent, is contacted by at least one idler guide roller which is rotated by the substrate. The angle of contact between the uncoated side of the substrate and the peripheral surface of the guide roller is increased by streams of compressed conditioning gas which is discharged by the orifices of two venturis one of which is located immediately upstream of the guide roller and directs gas counter to the direction of advancement of the substrate. The other venturi is located immediately downstream of the guide roller and its orifice discharges gas in the direction of advancement of the substrate.
Claims7
Apparatus for treating a coated web-shaped running substrate which has a coated side and an uncoated side and is advanced in a predetermined direction along a predetermined path, comprising at least one rotary idler roller adjacent a predetermined portion of said path at the uncoated side of the substrate;
- means for directing a compressed gas against the uncoated side of the substrate adjacent said at least one idler roller upstream and downstream of said predetermined portion of said path, including a first venturi upstream and a second venturi downstream of said predetermined portion of said path, said first venturi having at least one orifice which discharges gas counter to said direction and said second venturi having at least one orifice which discharges gas in said direction;
- and means for conditioning the gas before the gas contacts the uncoated side of the substrate in said path.
Dependencies are inferred from the claim text.