Tilton, Fallon, Lungmus
Process for recycling and reconstituting flexographic inks
 A process for recycling and reconstituting flexographic inks from wash water resulting from cleaning the rollers and other components of a flexographic printing press. The process includes the steps of circulating the wash water through a cross-flow ultrafilter to separate an optically-clear filtrate from a first concentrate containing suspended ink solids, bacteria, and macromolecules. Thereafter, the filtrate is directed through a reverse-osmosis filter to separate from the filtrate a second concentrate containing dissolved ink components and the remaining bacteria. The first and second concentrates are then combined together with a compatible biocidal agent to form a stable, biologically-inactive additive that is mixed with fresh ink concentrate to form pressready flexographic printing ink. 
Semler Industries, Inc.
B C B B C A C B B
B41F C09D B01D B01D C02F A61L C02F B01D B01D
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Loren H. Joseph M. Paul B. Jon Y.
Semler Palm Englram Clegg