| 摘要 |
A printing apparatus performing printing to a print medium includes a printer having at least two line heads with a plurality of recording modules; a scanner configured to scan an image printed with the printer to obtain a scanned image; a correcting-chart printing unit configured to print first and second correcting charts in first and second line head printing areas, respectively; a scanned image collecting unit configured to collect first and second scanned images; a correction-data calculating device configured to calculate correction data by determining a reference head difference from the first scanned image, determining an individual head difference from the second scanned image, summing up the reference head difference and the individual head difference to obtain a total, the reference head difference and the total being regarded as the correction data for the first and second line heads, respectively; and an adjusting device configured to adjust a timing. |
| 主权项 |
1. A printing apparatus configured to perform printing to a print medium, the printing apparatus comprising:
a printer having at least two line heads spaced away in a transportation direction of the print medium, the line heads each having a plurality of recording modules with a train of recording devices arranged linearly in a width direction of the print medium; a scanner configured to scan an image printed with the printer to obtain a scanned image; a correcting-chart printing unit configured to cause a first line head of the printer to print a first correcting chart in a first line head printing area, and cause a second line head to print a second correcting chart in a second line head printing area, away from the first line head printing area in the transportation direction, said recording modules being arranged in a width direction of the print medium so that line figures printed by the recording modules of the first line head, and line figures printed by the recording modules of the second line head, that are printed at the same position in the transportation direction, do not overlap each other; a scanned image collecting unit configured to operate the scanner to read the first line head printing area and the second line head printing area to collect a first scanned image and a second scanned image, respectively; a correction-data calculating device configured to calculate correction data, the correction-data calculating device regarding a line figure in the first scanned image formed with one of the plurality of recording modules as a reference line figure, and determining a difference in the transportation direction between the reference line figure and a line figure formed with the other recording module as a reference head difference, determining a difference in the transportation direction between a first line figure and a second line figure of the second scanned image as an individual head difference, the first line figure being formed with the first line head and the second line figure being formed with the second line head, and summing up the reference head difference and the individual head difference to obtain a total for every recording module, the reference head difference being regarded as the correction data in the transportation direction for every recording module in the first line head, and the total being regarded as the correction data for every recording module in the second line head; and an adjusting device configured to adjust a timing in accordance with the correction data upon printing with the printer. |
