Inventor
UNO MUGIJIROH
JP21 patents
Patents
21 patentsUS6033818AMar 7, 2000
Developing device for an image forming apparatus
RICOH KK53 citations96
US5879752AMar 9, 1999
Method of coating a toner conveyor roller
RICOH KK62 citations96
US5845183ADec 1, 1998
Developing device for an image forming apparatus
RICOH KK52 citations96
US5826144AOct 20, 1998
Developing device for an electrophotographic recording apparatus including bias control of a toner supplying roller
RICOH KK68 citations96
US5768665AJun 16, 1998
Image forming apparatus with bias control to prevent undesirable toner deposition
RICOH KK58 citations96
US5708942AJan 13, 1998
Developing device for an image forming apparatus
RICOH KK53 citations96
US5697026ADec 9, 1997
Developing device having the lengths of two toner transporting rollers and an image bearing member in specific relationships
RICOH KK62 citations96
US5625438AApr 29, 1997
Toner, and devices for electrostatically depositing a uniform application thereof
RICOH KK40 citations96
US5625441AApr 29, 1997
Developing device for an image forming apparatus
RICOH KK54 citations96
US5625440AApr 29, 1997
Developing device having seals between a toner transport roller and the toner hopper which prevent toner leakage and scattering
RICOH KK64 citations96
US5617191AApr 1, 1997
Toner conveyor roller and image forming apparatus having the same
RICOH KK84 citations96
US5489747AFeb 6, 1996
Developing device for an image forming apparatus
RICOH KK73 citations96
US5486909AJan 23, 1996
Developing device for an image forming apparatus
RICOH KK56 citations96
US7272354B2Sep 18, 2007
Cleaning unit and image forming apparatus having multiple cleaning blades
RICOH KK27 citations92
US7110696B2Sep 19, 2006
Cleaning unit, process cartridge, and image forming apparatus
RICOH KK27 citations92
US6022660AFeb 8, 2000
Developer, process cartridge and electrophotographic image forming apparatus that employs the developer and process cartridge
RICOH KK25 citations92
US5897243AApr 27, 1999
Electrophotographic recording apparatus configured to switch a bias voltage in a developing unit
RICOH KK49 citations92
US5552870ASep 3, 1996
Developing device for an image forming apparatus
RICOH KK39 citations92
US6512901B2Jan 28, 2003
Method and apparatus for image forming capable of preventing a contamination of a brush-roller charger
RICOH KK11 citations74
US5617190AApr 1, 1997
Developing device for an image forming apparatus which reduces toner consumption and waste
RICOH KK13 citations74
US5610693AMar 11, 1997
Developing device for an image forming apparatus
RICOH KK16 citations74