Solvent and multiple color ink mixing system in an ink jet

An ink jet printer head apparatus, comprising:

• a plurality of chambers adapted to receive different color inks;
• means to provide controlled pressure pulses within each chamber;
• a mixing conduit adapted to receive a preselected amount of ink(s) from the chambers;
• an ink drive chamber mounted in fluid communication with the mixing conduit;
• and
• a means to provide pressure pulses, upon demand, within the ink drive chamber to eject the desired mixed color ink.

A color ink jet attachment to a printer head, comprising:

• a primary chamber having an inlet and outlet, said chamber adapted to receive, under air-free conditions, a continuous supply of an ink solvent carrier and to continuously eject a predetermined amount of the solvent through the outlet;
• a plurality of secondary chambers, each adapted to receive a supply of a predetermined color ink, said chambers provided with an inlet to receive the supply of ink and an outlet to eject a controlled amount of color ink(s) through the outlet;
• a mixing line mounted in fluid communication with the outlets of the primary and secondary chambers, said mixing line receiving the flow of mixed solvent carrier and the ink(s) and directing the flow to an ink drive chamber;
• a piezoelectric means adapted to apply controlled pressure pulses to the ink and solvent carrier contained within the primary and secondary chambers to provide for a controlled color mixture within the mixing line;
• and
• a drive piezoelectric means mounted on the ink drive chamber for applying controlled pressure pulses to the color ink contained within the ink drive chamber to eject the ink through an ejector orifice from the ink drive chamber.

An ink jet printer head apparatus, comprising:

• a primary chamber adapted to receive a supply of ink solvent carrier;
• a plurality of secondary chambers each adapted to receive a supply of different color ink;
• means to provide controlled pressure pulses within each primary and secondary chambers;
• a mixing conduit mounted in fluid communication with the primary and secondary chambers and adapted to receive a preselected amount of the ink solvent carrier and the color ink(s);
• an ink drive chamber mounted in fluid communication with the mixing conduit;
• and
• a means to provide pressure pulses, upon demand, within the ink drive chamber to eject the desired mixed color ink.