EP 1178362 B1 20060524 - Image forming device with online image quality evaluation and associated method
Title (en)
Image forming device with online image quality evaluation and associated method
Title (de)
Bilderzeugungsvorrichtung mit Online-Bewertung der Bildqualität und zugehörigem Verfahren
Title (fr)
Dispositif de formation d'images avec évaluation de la qualité d'image en ligne et méthode associée
Publication
Application
Priority
US 62939400 A 20000801
Abstract (en)
[origin: EP1178362A2] An electrophotographic (EP) image-forming device and related method are provided for on-line quantitative assessment of the image information and development process. The EP image-forming device has a primary charger (118), an exposure device (120), a toning station (125), a transfer charger (130), a fusion station (140), and a cleaner (150) operatively disposed about the photoconductor. A transmission densitometer (165, 170) is positioned adjacent to the photoconductor. The densitometer determines the photoconductor density and the combination photoconductor and toner density for each step area on the image frame. The density readings are stored in memory. The photoconductor densities are subtracted from the combined densities to provide measured toner densities, which are then averaged for each step area. The average measured toner densities or voltage readings are compared to the aim toner densities or voltage readings for each step in the step tablet to quantitatively assess the image quality of the image-forming process. Preferably, every image frame on the photoconductor is assessed successively.
IPC 8 full level
G03G 15/00 (2006.01); G03G 21/00 (2006.01)
CPC (source: EP US)
G03G 15/5041 (2013.01 - EP US); G03G 2215/00042 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1178362 A2 20020206; EP 1178362 A3 20021002; EP 1178362 B1 20060524; AT E327525 T1 20060615; AU 7190601 A 20020213; CA 2386761 A1 20020207; CA 2386761 C 20050920; DE 10136746 A1 20020214; DE 50109854 D1 20060629; JP 2004505320 A 20040219; JP 4907040 B2 20120328; US 6650848 B1 20031118; WO 0210860 A1 20020207
DOCDB simple family (application)
EP 01117708 A 20010727; AT 01117708 T 20010727; AU 7190601 A 20010706; CA 2386761 A 20010706; DE 10136746 A 20010727; DE 50109854 T 20010727; JP 2002515526 A 20010706; US 0121524 W 20010706; US 62939400 A 20000801