Inventor
KATOH ATSUYUKI
JP18 patents
Patents
18 patentsUS6219498B1Apr 17, 2001
Image forming apparatus having improved image transfer characteristics
SHARP KK21 citations92
US5812923ASep 22, 1998
Image forming apparatus equipped with register rollers for curling transfer paper
SHARP KK25 citations92
US5799225AAug 25, 1998
Image forming apparatus having variable transfer and attraction voltage
SHARP KK19 citations92
US5347343ASep 13, 1994
Photosensitive drum cartridge and an image forming apparatus using the same
SHARP KK26 citations91
US7366447B2Apr 29, 2008
Image forming apparatus having non-contact charging roller
SHARP KK9 citations83
US5623329AApr 22, 1997
Transfer device for an image forming apparatus
SHARP KK16 citations82
US5017962AMay 21, 1991
Image forming apparatus with process-cartridges
SHARP KK21 citations81
US6259869B1Jul 10, 2001
Image forming apparatus
SHARP KK4 citations73
US6233422B1May 15, 2001
Image forming apparatus having transfer drum with transfer paper charging member
SHARP KK8 citations73
US6044236AMar 28, 2000
Image forming apparatus having improved image transfer characteristics
SHARP KK11 citations73
US6026256AFeb 15, 2000
Image forming apparatus
SHARP KK5 citations73
US7546058B2Jun 9, 2009
Image forming apparatus with partitioning member
SHARP KK3 citations63
US7167665B2Jan 23, 2007
Foreign material removing system, method of removing foreign material, printing apparatus and printing method
SHARP KK4 citations62
US6169862B1Jan 2, 2001
Image forming apparatus with nip time changing device
SHARP KK1 citations62
US6081686AJun 27, 2000
Image forming apparatus having transfer drum with specific construction
SHARP KK2 citations62
US6118954ASep 12, 2000
Image forming apparatus having transfer roller with charge-removing and cleaning devices
SHARP KK0 citations52
US7539435B2May 26, 2009
Image forming apparatus with isolating member for powder developer
SHARP KK0 citations42
US7035577B2Apr 25, 2006
Developing apparatus, image forming apparatus and toner replenishing method
SHARP KK0 citations42