Patent ID: 11970012
Assignee: RICOH COMPANY, LTD.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. An inkjet printing device comprising:
a dark ink container containing a dark ink of a color;
a light ink container containing a light ink of the color;
a dark ink discharging nozzle group configured to discharge the dark ink; and
a light ink discharging nozzle group configured to discharge the light ink,
wherein the light ink discharging nozzle group is disposed upstream of the dark ink discharging nozzle group in a sub-scanning direction,
wherein the following Relationship 1 is satisfied:
10/100≤a ratio of a pigment content in the light ink to a pigment content in the dark ink≤40/100 Relationship 1; and
wherein the dark ink discharging nozzle group and the light ink discharging nozzle group each includes a nozzle array including one or more ink discharging nozzles,
wherein the number of the dark ink discharging nozzle group and the light ink discharging nozzle group that are disposed in the sub-scanning direction is at least three in total.