Coater with Upper and Lower Pan
Original Publication Date: 1983-Mar-01
Included in the Prior Art Database: 2005-Feb-07
On a standard three-roll reverse coater (Fig. 1), the two lower rolls (metering 1 and applicator 3) dip into the coating solution. When the solution consists of highly volatile (fast) solvent and has a high solids content, a crust will form on the surface and build up on the ends of the rolls. This is avoided by the two-level system of Fig. 2, in which the applicator roll 3 dips in a small, upper pan 5 and the metering roll is above the liquid of the larger, lower pan 7.