(19)
(11)EP 2 484 532 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
03.01.2018 Bulletin 2018/01

(43)Date of publication A2:
08.08.2012 Bulletin 2012/32

(21)Application number: 11193196.0

(22)Date of filing:  13.12.2011
(51)International Patent Classification (IPC): 
B41J 2/21(2006.01)
G06K 15/10(2006.01)
(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30)Priority: 13.12.2010 JP 2010277489

(71)Applicant: Ricoh Company, Ltd.
Tokyo 143-8555 (JP)

(72)Inventors:
  • Takagi, Yasunobu
    Tokyo, 143-8555 (JP)
  • Kamei, Toshihito
    Tokyo, 143-8555 (JP)
  • Ito, Takayuki
    Tokyo, 143-8555 (JP)

(74)Representative: Schwabe - Sandmair - Marx 
Patentanwälte Rechtsanwalt Partnerschaft mbB Joseph-Wild-Straße 20
81829 München
81829 München (DE)

  


(54)Image Forming Apparatus and Computer Program Product


(57) An ink-jet image forming apparatus (60) for scanning a recording medium (12) in a main scanning direction by an ink-jet head (7), and conveying the recording medium in a sub scanning direction so that a printing area formed at every scan by the recording head overlaps with an adjacent printing area at their boundary area. The apparatus includes a distribution determining unit (606) that determines a dot distribution at every scan in the overlapped boundary area, a nozzle determining unit (610) that determines an alternative nozzle capable of forming dots instead of an non-ejectable nozzle in the overlapped boundary area, and a dot determining unit (612) that determines a dot size or a dot density from the alternative nozzle, on the basis of a printing position by the alternative nozzle and the dot distribution determined by the dot distribution determining unit.







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