Ink-jet printing apparatus and ink reservoir unit attached thereto

An ink-jet printing apparatus that jets at least two types of inks having different densities with respect to at least one specific color, the ink-jet printing apparatus comprising:

• an ink-jet head assembly comprising a plurality of ink-jet heads mutually affixed to each other, the plurality of ink-jet heads comprising,
• a first ink-jet head including a plurality of deep ink nozzles configured to jet deep ink having a comparatively high density with respect to said at least one specific color, and
• a second ink-jet head including a plurality of light ink nozzles configured to jet light ink having a comparatively low density with respect to said at least one specific color,
• wherein the nozzles of said second ink-jet head are configured to jet ink toward a targeted reference impact area on a printing medium with a greater accuracy than the nozzles of said first ink-jet head such that an actual point of impact of the ink jetted from the nozzles of said second ink-jet head deviate less from a targeted reference impact area than the ink jetted from the nozzles of said first ink-jet head.

An ink reservoir constructed to be attached to an ink-jet printing apparatus that jets at least two types of inks having different densities with respect to at least cyan and magenta, the ink-jet printing apparatus comprising an ink-jet head assembly comprising a plurality of ink-jet heads that are mutually affixed to each other, the plurality of ink-jet heads comprising, a first ink-jet head including a plurality of deep cyan nozzles configured to jet deep cyan ink having a comparatively high density with respect to at least cyan and magenta and a plurality of deep magenta nozzles configured to jet deep magenta ink having a comparatively high density with respect to at least cyan and magenta, and a second ink-jet head including a plurality of light cyan nozzles configured to jet light cyan ink having a comparatively low density with respect to at least cyan and magenta and a plurality of light magenta nozzles configured to jet light magenta ink having a comparatively low density with respect to at least cyan and magenta, wherein the nozzles of said second ink-jet head jet ink toward a targeted reference impact area on a printing medium with a greater accuracy than the nozzles of said first ink-jet head so that an actual point of impact of the ink jetted from the nozzles of said second ink-jet head deviate less from the targeted reference impact area than the ink jetted from the nozzles of said first ink-jet head, the ink reservoir comprising:

• at least two reservoir sections, comprising,
• a first reservoir section including at least a deep cyan vessel configured to store the deep cyan ink and a deep magenta vessel configured to store the deep magenta ink wherein the deep cyan vessel and the deep magenta vessel are connected to each other, and
• a second reservoir section including at least a light cyan vessel configured to store the light cyan ink and a light magenta vessel configured to store the light magenta ink wherein the light cyan vessel and the light magenta vessel are connected to each other.

An ink reservoir constructed to be attached to an ink-jet printing apparatus that jets at least two types of inks having different densities with respect to at least cyan and magenta, the ink-jet printing apparatus comprising an ink-jet head assembly comprising a plurality of ink-jet heads that are mutually affixed to each other, the plurality of ink-jet heads comprising, a first ink-jet head including a plurality of deep cyan nozzles configured to jet deep cyan ink having a comparatively high density with respect to at least cyan and magenta and a plurality of deep magenta nozzles configured to jet deep magenta ink having a comparatively high density with respect to at least cyan and magenta, and a second ink-jet head including a plurality of light cyan nozzles configured to jet light cyan ink having a comparatively low density with respect to at least cyan and magenta and a plurality of light magenta nozzles configured to jet light magenta ink having a comparatively low density with respect to at least cyan and magenta, wherein the nozzles of said second ink-jet head jet ink toward a targeted reference impact area on a printing medium with a greater accuracy than the nozzles of said first ink-jet head so that an actual point of impact of the ink jetted from the nozzles of said second ink-jet head deviate less from the targeted reference impact area than the ink jetted from the nozzles of said first ink-jet head, the ink reservoir comprising:

• at least two reservoir sections, comprising,
• a first reservoir section including at least a deep cyan vessel configured to store the deep cyan ink and a light cyan vessel configured to store the light cyan ink wherein the deep cyan vessel and the light cyan vessel are connected to each other, and
• a second reservoir section including at least a deep magenta vessel configured to store the deep magenta ink and a light magenta vessel configured to store the light magenta ink wherein the deep magenta vessel and the light magenta vessel are connected to each other.