Method of detecting and notifying defective printing by an inkjet printer, inkjet printer and printer driver executing the method

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(11)

EP 2 105 304 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 A2)

(48)	Corrigendum issued on:
	04.11.2009 Bulletin 2009/45

(43)	Date of publication:
	30.09.2009 Bulletin 2009/40

(21)	Application number: 09003925.6

(22)	Date of filing: 18.03.2009

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International Patent Classification (IPC):

B41J 2/165^(2006.01)

(84)	Designated Contracting States:
	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 SE SI SK TR
	Designated Extension States:
	AL BA RS

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Priority:

26.03.2008 JP 2008079977
16.02.2009 JP 2009032348

(71)	Applicant: Seiko Epson Corporation
	Tokyo 163-0811 (JP)

(72)	Inventors:
	Nakamaki, Motohiro Suwa-shi, Nagano-ken 392-8502 (JP) Kodama, Tomohiro Suwa-shi, Nagano-ken 392-8502 (JP) Sohei, Yagisawa Suwa-shi, Nagano-ken 392-8502 (JP)

(74)	Representative: Hoffmann, Eckart
	Bahnhofstrasse 103 82166 Gräfelfing 82166 Gräfelfing (DE)

(54)	Method of detecting and notifying defective printing by an inkjet printer, inkjet printer and printer driver executing the method

(57) A method of printing an indication of defective printing can print a defective-printing mark indicating that printing was not completed normally on a printout containing unprinted or missing dots. When printing one page of print data to recording paper (3) is completed to just before a paper discharge command indicating a page break (step ST3), the operation printing the one page of print data is interrupted and whether or not ink droplets are being discharged normally from the ink nozzles of the inkjet head (17) is detected (step ST4). If the ink droplets are not being discharged normally, the recording paper (3) is conveyed in reverse direction B and mark print data for the defective-printing mark is printed on the recording paper (3) as part of the interrupt process (steps ST8, ST9). Therefore, if the recording paper (3) contains unprinted missing dots, a defective-printing mark is printed on the recording paper (3) and printing the one page of print data then ends.