(19)
(11) EP 1 201 449 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.05.2003 Bulletin 2003/20

(43) Date of publication A2:
02.05.2002 Bulletin 2002/18

(21) Application number: 01309026.1

(22) Date of filing: 24.10.2001
(51) International Patent Classification (IPC)7: B41J 2/05
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 31.10.2000 US 702379

(71) Applicant: Hewlett-Packard Company
Palo Alto, CA 94304 (US)

(72) Inventors:
  • Askeland, Ronald A.
    San Diego, CA 92129 (US)
  • Prakash, Satya
    Poway, CA 92064 (US)
  • Giere, Matthew D.
    San Diego, CA 92129 (US)

(74) Representative: Jackson, Richard Eric et al
Carpmaels & Ransford, 43 Bloomsbury Square
London WC1A 2RA
London WC1A 2RA (GB)

   


(54) A system and method for improving the edge quality of inkjet printouts


(57) This present invention is embodied in a printing system (100) for improving edge quality of ink drops produced by an inkjet printer (300). In general, the present invention can include an inkjet printhead assembly (116) that incorporates a preprogrammed correction scheme (212) for correcting systematic ink drop placement errors of the inkjet printhead (116). A general correction scheme (212) can be developed for a class of inkjet printhead assemblies during manufacturing of the class of inkjet printhead assemblies. The correction scheme (212) could include general corrections that cover general errors that exist for the entire class of inkjet printheads. Alternatively, individual correction schemes (212) can be developed during manufacturing of each inkjet printhead assembly (116) that covers specific errors that exists for each individual printhead.






Search report