| 摘要 |
PROBLEM TO BE SOLVED: To provide an inkjet printing apparatus which can prevent the generation of a phenomenon of strike through or offset. SOLUTION: A feeding drive roller 5 and an inkjet head 10 are liftably integrated via a drive axis 4. When the feeding drive roller 5 is lifted by the feeding of the printing sheets P, a lever 13 is oscillated and a shielding plate 14 with a slit 18 is moved to change the output of an optical detection sensor 16, detecting sheet the thickness. When the sheet thickness is less than a fixed value and the ink passing properties are high, a pulse signal is repeatedly sent to the inkjet means to eject a large number of misty ink droplets, making the misty ink droplets hard to pass through the printing sheet as compared with the case where one drop type ink droplets are ejected, with fast drying of the droplets. COPYRIGHT: (C)2006,JPO&NCIPI
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