DUAL FEED FLOW SYSTEM APPARATUS FOR A PAPER WEB COATER

摘要

A flow system apparatus has a dual chamber for directing countercurrent flows of coating within the chambers from inlet to exit ends in each chamber. Each chamber has a plurality of longitudinally extending flow openings for permitting the coating flowing within a chamber to exit from the chamber in a direction substantially perpendicular to the longitudinal flow within the chamber. The flow openings in both of the chambers are connected to a mixing chamber where their flows are combined to be directed into a coater head for application to a traveling paper web substantially uniformly along an opening extending across the web substantially perpendicular to the direction of web travel. In a preferred embodiment, control of the flow of the aqueous slurry near the edges of the traveling paper web is effected by a plurality of control openings extending between the dual chambers near their inlet and exit ends. The overflow from the exit ends of each of the dual chambers can either be recycled into the system producing the aqueous flow, or it can be redirected into the inlet ends of either of the dual chambers.