Patent ID: 6073774
Filing Date: 2000-06-13
Classification: B03B,B03D,D21B,D21F,Y02W

Abstract:
A foam floatation module for separating ink particles by floatation from a stock fed therethrough, the module comprising:a sealed generally cylindrical container horizontally disposed, the container having a generally conical shell forming a stock inlet at one end and a generally conical shell forming a stock outlet at the other end;a quantity of papermaking stock, mixed with air and containing ink particles flowing through the container;uppermost portions of the container having a first outlet connected thereto for removing ink laden foam from the container;a first adjustable valve mounted to control the flow from the first outlet;a first baffle extending downward from and joined to the uppermost portion of the container between the first outlet and the stock outlet;an outlet baffle joined to the container and extending upstream of and spaced from the stock outlet, the outlet baffle positioned to prevent stock flow directly from the stock inlet to the stock outlet;a second outlet connected to the container above the outlet baffle and between where the first baffle joins the container and where the outlet baffle joins the container; a second adjustable valve mounted to control the flow from the second outlet;a third outlet connected to the container between the second outlet and where the first baffle joins the container; anda third adjustable valve mounted to control the flow from the third outlet, wherein the second outlet is connected to the stock inlet.