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US 5,628,914 AGranted
Method for recycling lithographic ink
OwnerFrank Prasilinventor
Life of this patent
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OwnerFrank Prasilinventor
Estimating the term…
A closed system for reclaiming ink, solvent, and water from waste lithographic ink, or other ink types, without generating hazardous by-products is disclosed. The recycling process is performed under vacuum conditions on standard equipment, such as an agitation station, an evaporator chamber, a grinder, a condensation tank, and a vapor exhaust recovery condenser, readily available in the ink industry. Waste ink containing ink solids, solvent, water, and possibly foreign material such as debris, lint, paper, and dust, is first mixed to create a homogeneous slurry mixture of the ink, solvent, water and foreign materials. Next, water and solvent is evaporated from the slurry mixture and collected so that it may condensate and then settle. The slurry mixture is ground and heated up in order to evaporate any remaining water and solvent from the slurry. The grinding step grinds the ink and any foreign material to create an ink emulsion characterized as having particles smaller than or equal to the size of the original virgin ink from which the waste ink is derived. The evaporation step may be performed either before and during the grinding step, or only during the grinding step.
A method of reclaiming waste ink contaminated with water, solvents, and solid impurities, comprising the steps of:
A method of reclaiming waste ink contaminated with water, solvents, and solid impurities, comprising the steps of:
A method of reclaiming waste ink contaminated with water, solvents, and solid impurities, comprising the steps of:
Dependencies are inferred from the claim text.