Manipulation of coating streams with air foils
AssigneePolaroid Corporation
InventorWilliam J. Timson
Life of this patent
Estimating the term…
Abstract
The velocity of a free falling coating composition stream emitted from a coating applicator is altered prior to reaching a web by streams of gas directed over air foils situated immediately adjacent said coating composition stream.
Claims6
In an apparatus which includes a means for dispensing a free falling stream of fluid coating composition onto a moving web;
- the improvement which comprises at least one air foil located below said deposition means and positioned to be adjacent a stream of coating composition dispensed from said composition deposition means, and means for passing a stream of gas over the surface of the air foil immediately adjacent said stream of coating composition;
- whereby the stream of gas passed over said air foil provides a frictional effect acting generally parallel to and upon said stream of coating composition and alters the free fall velocity of the stream of coating composition as it moves toward the web.
A method for altering the free fall velocity of a free falling fluid coating composition stream dispersed from a coating applicator prior to reaching a moving web, said method comprising directing a stream of gas over at least one air foil having a surface situated immediately adjacent said stream of coating composition whereby a frictional effect acting generally parallel to and upon said stream of coating composition alters the free fall velocity of said stream of coating composition as it moves toward said web.
Dependencies are inferred from the claim text.