发明名称 |
Inkjet printing apparatus and method of correcting step shift thereof |
摘要 |
Provided is an inkjet printing apparatus configured to perform printing by discharging ink droplets onto a print medium. The apparatus includes a printing head having a plurality of inkjet heads and configured to perform printing by discharging the ink droplets from the plurality of inkjet heads onto the print medium; a chart printing device configured to print a step-shift correcting chart with the printing head; a reading device configured to read the step-shift correcting chart printed on the print medium; a print medium-processed portion detecting device configured to detect a processed portion of the print medium; an uninfluenced step-shift correcting-chart generating device configured to generate an uninfluenced step-shift correcting chart; and a shift-amount calculating device configured to calculate a shift amount for correcting the step shift in accordance with the uninfluenced step-shift correcting chart. |
申请公布号 |
US9085169(B2) |
申请公布日期 |
2015.07.21 |
申请号 |
US201414283890 |
申请日期 |
2014.05.21 |
申请人 |
SCREEN Holdings Co., Ltd.;Ricoh Company, Ltd. |
发明人 |
Yamanaka Kazuki;Nomura Seiya |
分类号 |
B41J29/393;B41J2/21 |
主分类号 |
B41J29/393 |
代理机构 |
Ostrolenk Faber LLP |
代理人 |
Ostrolenk Faber LLP |
主权项 |
1. An inkjet printing apparatus configured to perform printing by discharging ink droplets onto a print medium, the apparatus comprising:
a printing head having a plurality of inkjet heads and configured to perform printing by discharging the ink droplets from the plurality of inkjet heads onto the print medium; a chart printing device configured to print a step-shift correcting chart with the printing head, the step-shift correcting chart having a plurality of lines orthogonal to the transportation direction and a blank area separating the plurality of lines and being used for correcting step shift as printing shift of the plurality of inkjet heads in a transportation direction; a reading device configured to read the step-shift correcting chart printed on the print medium; a print medium-processed portion detecting device configured to detect a processed portion of the print medium formed in a direction orthogonal to the transportation direction of the print medium in accordance with the blank area; an uninfluenced step-shift correcting-chart generating device configured to eliminate an influence of the processed portion of the print medium detected by the print medium-processed portion detecting device from the step-shift correcting chart read by the reading device, thereby generating an uninfluenced step-shift correcting chart; and a shift-amount calculating device configured to calculate a shift amount for correcting the step shift in accordance with the uninfluenced step-shift correcting chart. |
地址 |
JP |