Apparatus for filtering solution
AssigneePall Corporation
InventorsSean G. Meenan, Richard C. Stoyell, Jr.
Life of this patent
Estimating the term…
Abstract
The disclosure describes an apparatus for treating fountain solution which comprises a recirculation assembly and a microporous filter assembly. The recirculation assembly disconnected between the outlet and inlet of a fountain solution tray of a printing system. The recirculation assembly includes a fountain solution sump and a return line which extends from the outlet of the fountain solution tray to the sump. The microporous filter assembly is positioned in the sump or in the return line and includes a filter position across a fountain solution flow path and having a removal rating of at least about 99.98% at about 20 microns or finer.
Claims11
An apparatus for treating fountain solution for a printing system which includes at least one fountain solution tray having an outlet and an inlet, the apparatus comprising:
- a recirculation assembly connectable between the outlet of the fountain solution tray and the inlet of the fountain solution tray of the printing system and operable to circulate fountain solution from the outlet of the fountain solution tray through the recirculation assembly to the inlet of the fountain solution tray of the printing system, the recirculation assembly including a fountain solution sump and a return line extending from the fountain solution tray of the printing system to the fountain solution sump of the recirculation assembly, and
- a microporous filter assembly disposed in the fountain solution sump of the recirculation assembly or in the return line between the outlet of the fountain solution tray of the printing system and the fountain solution sump of the recirculation assembly, the microporous filter assembly including at least one hollow, cylindrical filter cartridge which includes the filter, the return line of the recirculation assembly including a flexible conduit connected to the filter cartridge and the filter cartridge is free to float on a surface of the fountain solution or sink beneath the surface of the fountain solution in the fountain solution sump, the filter having a removal rating of at least 99.98% at about 20 microns or finer.
Dependencies are inferred from the claim text.