High-shear liquid mixing and dispersing apparatus

Details High-shear liquid mixing and dispersing apparatus High-shear liquid mixing and dispersing apparatus

1997-09-02

1999-07-27

Fisher, J. Reed

Printing

Inkers

Fountains

101366, B41F 3103, B41F 3108

Patent

active

059272007

ABSTRACT:
A mixing and dispersing apparatus for emulsion ink in a printing press is disclosed. The apparatus includes a vessel having walls defining an upper chamber and a lower chamber. A motor drives a shaft carrying a propeller having pitched blades, disposed in the upper chamber. The shaft also carries a rotor disposed below the propeller. The rotor includes downwardly extending teeth that are disposed adjacent to inner and outer stator walls. The inner and outer stator walls are perforated by slots therein and are fixed with respect to the vessel. The propeller mixes ink and fountain solution and propels the mixture downward toward the rotor, which shears and disperses the ink and fountain solution into the lower chamber, forming a suitably stable emulsion ink. The emulsion ink is then pumped to an ink distribution rail for use of some of the emulsion ink for printing, with the remainder of the emulsion ink being recirculated to the mixing and dispersing apparatus.

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TAGA Proceedings, "Theoretical and Practical Aspects of Single Fluid Lithography", Chou et al., pp. 121-139, 1995.

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