Inventor
MURAYAMA HISAO
JP21 patents
Patents
21 patentsUS5737680AApr 7, 1998
Image forming apparatus with toner recycling device
RICOH KK59 citations96
US5604575AFeb 18, 1997
Image forming apparatus with toner recycling device
RICOH KK41 citations96
US5493382AFeb 20, 1996
Image forming apparatus with toner recycling device
RICOH KK84 citations96
US5475476ADec 12, 1995
Image density control method for an image recorder
RICOH KK44 citations96
US7010246B2Mar 7, 2006
Image forming apparatus, drum unit, image forming module, and method of insertion and removal of a damper into and from an image carrier drum
RICOH KK13 citations92
US5869213AFeb 9, 1999
Multicolor image forming method preventing contamination of toner on an image carrier with toner on a developing carrier
RICOH KK23 citations92
US5682572AOct 28, 1997
Image density control method for an image recorder
RICOH KK27 citations92
US5541029AJul 30, 1996
Multicolor image forming method preventing mixing of colors
RICOH KK38 citations92
US5438401AAug 1, 1995
Multicolor image forming method and apparatus therefor
RICOH KK41 citations92
US5231452AJul 27, 1993
Image forming control method using variable state factors and fuzzy computation
RICOH KK31 citations92
US5008711AApr 16, 1991
Image forming apparatus
RICOH KK49 citations92
US7003251B2Feb 21, 2006
Image forming method having transfer temperature difference and apparatus for the same
RICOH KK12 citations84
US6983117B2Jan 3, 2006
Image forming apparatus configured for double sided printing
RICOH KK12 citations84
US4931374AJun 5, 1990
Electrophotographic positive charging toner containing a copper phthalocyanine blue pigment
RICOH KK19 citations81
US7321742B2Jan 22, 2008
Image forming apparatus, drum unit, image forming module, and method of insertion and removal of a damper into and from an image carrier drum
RICOH KK8 citations74
US6898398B2May 24, 2005
Apparatus for image forming on both sides of a recording medium and image forming method, and image carrier for the same
RICOH KK9 citations74
US5258813ANov 2, 1993
Developing device for a multicolor image forming apparatus having a toner particle size distribution which prevents mixture of toners of different colors
RICOH KK8 citations74
US4554233ANov 19, 1985
Electrophotographic toner containing triazolium compound as charge controlling agent
RICOH KK6 citations72
US7548712B2Jun 16, 2009
Image forming apparatus, drum unit, image forming module, and method of insertion and removal of a damper into and from an image carrier drum
RICOH KK2 citations63
US7295795B2Nov 13, 2007
Image forming apparatus and an impurity collecting device associated with registration rollers
RICOH KK4 citations63
US7197269B2Mar 27, 2007
Method, system and apparatus for transferring toner images to both sides of a recording medium
RICOH KK5 citations63