Air knife

Details Air knife Air knife

B - Operations, Transporting

05

C

32/28

B05C 11/06 (2006.01)

Patent

CA 1306351

ABSTRACT OF THE DISCLOSURE Air knife designed to be used in coating machines or equi- valent to finish and smooth the coating by blowing air onto it, e.g. to remove excess coating material, said air knife comprising a main channel into which the air is blown in the axial direction of the channel at least from one direction, the main channel being so constructed that there are two air jets flowing in opposite directions and having equal and constant velocities over the whole length. Thus the air jets discharged from slits next to a partition between the two main channel sections, after being merged, flow in a direc- tion perpendicular to the slit and the air flow is evenly distributed over the whole length of the slit. By using a construction in which the partition is movable, the location of the point at which the two jets mix can be varied, thus allowing the turbulence of the air jet blown at the web to be controlled and, consequently, an influence to be exerted on the properties of the coating surface.

569433

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