| 摘要 |
PROBLEM TO BE SOLVED: To prevent an image quality from being deteriorated by preventing an insufficient ink supply to a recording head from occurring, even when the width of a nozzle formation region of the recording head is made large, in an inkjet imaging device. SOLUTION: An inkjet printer comprises an ink tank 11 for storing an ink and a recording head 18 for discharging the ink to be supplied from the ink tank 11 from a plurality of nozzles. The recording head 18 is arranged in a higher position than the ink tank 11 and the pressure of the ink contained in the recording head 18 is made negative by the head difference of the ink inside the ink tank 11 and the recording head 18. In addition, when the width of 0.0381 to 0.1016 m of the nozzle formation region in the recording head 18, is given as W[m]; the ink viscosity asρ[mPa s]; and the fluid resistance from the ink tank 11 to the recording head 18 as Rc[Pa s/m<SP>3</SP>], the relationship among W,ρand Rc is established as Rc≥2.5×10<SP>9</SP>/(W×ρ). COPYRIGHT: (C)2005,JPO&NCIPI |
