Ink delivery system for liquid electrophotographic color printer including recycling capability for carrier

An ink delivery system for a liquid electrophotographic color printer which is operative to deliver a developer liquid of a predetermined concentration, the developer liquid being a mixture of a toner and a liquid carrier to a plurality of development units, comprising:

• a plurality of circulation tanks connected to the respective development units and in which the developer liquids to be supplied to the development units are stored;
• a plurality of jet portions disposed between the respective circulation tanks and the respective development units, for jetting ink in the circulation tanks to development gaps in the respective development units;
• a plurality of ink cartridges having ink tanks detachably installed in a printer body and in which concentrated ink having different colors is stored;
• a plurality of concentrated ink supply paths through which the concentrated ink accommodated in the respective ink tanks is supplied to the corresponding circulation tanks;
• a carrier tank fixed in the printer body and in which the carrier to be supplied to the respective circulation tanks is stored;
• a carrier supply path through which the carrier in the carrier tank is supplied to the respective circulation tanks;
• a waste ink disposal tank connected to the respective circulation tanks by an ink exhaust path, for collecting the waste ink in the circulation tanks;
• and
• filtering means installed between the waste ink disposal tank and the carrier tank, for filtering the waste ink in the waste ink disposal tank to supply the carrier to the carrier tank.