Inventor
MIZUISHI HARUJI
JP32 patents
⚠️ This page may combine multiple inventors who share the name “MIZUISHI HARUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
30 patentsUS6266501B1Jul 24, 2001
Image-forming apparatus having a seal for a developer and a method for detecting a removal of the seal
RICOH KK90 citations98
US5887224AMar 23, 1999
Image forming device with improved mixing of circulated developer with replensihed toner
RICOH KK97 citations98
US6085062AJul 4, 2000
Electrophotographic image forming apparatus
RICOH KK100 citations97
US6628903B1Sep 30, 2003
Image forming apparatus having a sensor for sensing an amount of reflected light from both a photoconductive element and a paper
RICOH KK52 citations96
US6148161ANov 14, 2000
Image forming apparatus with improved toner density control
RICOH KK64 citations96
US6144822ANov 7, 2000
Image forming apparatus having detachable transfer roller and discharge device
RICOH KK63 citations96
US6144811ANov 7, 2000
Image forming apparatus having a sensor for sensing an amount of reflected light from both a photoconductive element and a paper
RICOH KK70 citations96
US6160969ADec 12, 2000
Image forming apparatus with a voltage applying unit for image transfer
RICOH KK57 citations95
US6128449AOct 3, 2000
Image forming apparatus and method for controlling charging and developing bias voltage
RICOH KK72 citations95
US6055388AApr 25, 2000
Image forming apparatus and method for obtaining appropriate toner density
RICOH KK83 citations95
US6006050ADec 21, 1999
Image forming method and apparatus for controlling amount of supplied toner or agitating time
RICOH KK75 citations95
US5812919ASep 22, 1998
Image transferring device for an image forming apparatus
RICOH KK74 citations95
US7493061B2Feb 17, 2009
Process cartridge including at least one replaceable member and image forming apparatus
RICOH KK22 citations92
US7373101B2May 13, 2008
Method and apparatus for image forming and effectively applying lubricant to an image bearing member
RICOH KK24 citations92
US7313347B2Dec 25, 2007
Cleaning device, process cartridge, image forming apparatus and toner
RICOH KK32 citations92
US6898383B2May 24, 2005
Image forming apparatus
RICOH KK19 citations92
US5915143AJun 22, 1999
Image forming apparatus and method for automatically adjusting toner density in response to humidity variations
RICOH KK55 citations92
US5873019AFeb 16, 1999
Image forming apparatus having roller cleaning system and method
RICOH KK44 citations92
US5857132AJan 5, 1999
Apparatus and method for cleaning a transfer device of an image forming apparatus
RICOH KK28 citations92
US5822667AOct 13, 1998
Transfer separator
RICOH KK38 citations92
US7826786B2Nov 2, 2010
Image forming apparatus, lubricant applying device, transfer device, process cartridge, and toner
RICOH KK17 citations84
US7672635B2Mar 2, 2010
Method and apparatus for image forming and effectively applying lubricant to an image bearing member
RICOH KK8 citations84
US7333744B2Feb 19, 2008
Image forming apparatus that charges a photosensitive member by superimposing an alternate current bias voltage on a direct current bias voltage as the charge bias voltage
RICOH KK11 citations84
US7177555B2Feb 13, 2007
Image forming process and image forming apparatus
RICOH KK18 citations84
US7209698B2Apr 24, 2007
Method and apparatus for image forming capable of using minuscule spherical particles of toner, a process cartridge in use for the apparatus and a toner used in the image forming for obtaining an image with a high thin line reproducibility
RICOH KK13 citations83
US7158730B2Jan 2, 2007
Image forming apparatus, process cartridge, developing unit, and image forming method
RICOH KK6 citations73
US7477856B2Jan 13, 2009
Method and apparatus for image forming capable of effectively preventing resonance of frequencies
RICOH KK6 citations63
US6928255B2Aug 9, 2005
Image forming apparatus including developing gap between image and developer carriers
RICOH KK3 citations63
US7539451B2May 26, 2009
Image forming apparatus and toner
RICOH KK5 citations62
US7522850B2Apr 21, 2009
Image forming apparatus, process cartridge, developing unit, and image forming method
RICOH KK4 citations62