Inventor
ISHIYAMA HARUMI
JP41 patents
Patents
41 patentsUS6128456AOct 3, 2000
Image forming apparatus having a charging member applying an electric charge through electrically conductive or electroconductive particles to the surface of a photosensitive or image bearing member
CANON KK76 citations96
US6442362B2Aug 27, 2002
Image forming apparatus for making recovery and restoration of toners by electrical conductive member
CANON KK19 citations93
US6289190B1Sep 11, 2001
Electrophotographic apparatus and process cartridge
CANON KK27 citations93
US6226480B1May 1, 2001
Image forming apparatus supplying charging accelerating particles to image bearing body in non-image forming
CANON KK23 citations93
US6212346B1Apr 3, 2001
Charging member for holding electrically conductive particles in cells
CANON KK20 citations93
US6134407AOct 17, 2000
Charging apparatus for charging a moving member to be charged including an elastic rotatable member carrying electroconductive particles on the surface thereof
CANON KK29 citations93
US6081681AJun 27, 2000
Charging device, charging method, process cartridge and image forming apparatus
CANON KK38 citations93
US6038420AMar 14, 2000
Charging device, charging method and image forming apparatus
CANON KK19 citations93
US6002900ADec 14, 1999
Image forming method, image forming apparatus and process cartridge
CANON KK20 citations92
US5708932AJan 13, 1998
Charging system and electrophotography apparatus
CANON KK21 citations92
US6549742B1Apr 15, 2003
Charging apparatus employing charging particles, and image forming apparatus employing such a charging apparatus
CANON KK16 citations84
US6298205B1Oct 2, 2001
Charging apparatus which stores electrically conductive particles in granule form
CANON KK16 citations84
US6272301B1Aug 7, 2001
Image forming apparatus featuring a rotatable electroconductive foam member
CANON KK16 citations84
US6038418AMar 14, 2000
Charging method and a charging device for charging a member to be charged by a flexible charging member
CANON KK16 citations84
US6301459B1Oct 9, 2001
Charging apparatus with first and second charging members
CANON KK13 citations82
US6061539AMay 9, 2000
Charging member, charging device and image forming apparatus
CANON KK13 citations82
US7116922B2Oct 3, 2006
Charging apparatus
CANON KK6 citations74
US6904253B2Jun 7, 2005
Charging member having an elastic foam member including cell portions whose gap ratio is 5% to 50%, charging apparatus, process cartridge, and image forming apparatus having such charging member
CANON KK11 citations74
US6615010B2Sep 2, 2003
Electrifier for charging developer carrying member using charge particles, including charge rotary member and nip forming member having bias polarity the same as developer polarity
CANON KK9 citations74
US6580889B1Jun 17, 2003
Image forming apparatus having a member to be charged, injection charging means having an elastic member for press-contacting the member to be charged, and electroconductive particles between the elastic member and the member to be charged
CANON KK7 citations74
US6553199B2Apr 22, 2003
Charging device, process cartridge and image forming apparatus
CANON KK9 citations74
US6519433B1Feb 11, 2003
Image forming apparatus in which electroconductive particles are supplied to charging means from developing device by way of image bearing member
CANON KK9 citations74
US6466758B2Oct 15, 2002
Developing apparatus having foreign matter accumulating space
CANON KK7 citations74
US6389254B2May 14, 2002
Charging member holding charge accelerating particles in a continuous bubble
CANON KK8 citations74
US6301455B1Oct 9, 2001
Charging member, charging device and image forming apparatus wherein deposition of magnetic particles to a member to be charged is effectively prevented
CANON KK8 citations74
US6233419B1May 15, 2001
Charging device and image forming apparatus
CANON KK13 citations74
US6173144B1Jan 9, 2001
Image forming apparatus which supplies image bearing member with electrically conductive particles during development
CANON KK14 citations74
US6163671ADec 19, 2000
Contact charger having charging performance enhancing particles existing at a contact portion between the contact charger and the member to be charged
CANON KK15 citations74
US6118965ASep 12, 2000
Image forming apparatus having a contact-type charger
CANON KK13 citations74
US5930566AJul 27, 1999
Electrostatic charging apparatus having conductive particles with a multi-peaked size distribution
CANON KK7 citations74
US5822659AOct 13, 1998
Image forming apparatus and process cartridge detachably mountable relative to an image forming apparatus
CANON KK16 citations74
US5754927AMay 19, 1998
Magnetic charging brush having particular magnetic fields
CANON KK8 citations74
US5729802AMar 17, 1998
Contact charger for charging a photosensitive member
CANON KK15 citations74
US5666192ASep 9, 1997
Charging member and image forming apparatus
CANON KK11 citations74
US5659852AAug 19, 1997
Image forming method, image forming apparatus and process cartridge
CANON KK17 citations74
US5579095ANov 26, 1996
Charging device
CANON KK16 citations74
US6473582B2Oct 29, 2002
Contact-type charging device having a plurality of projections over the surface of the charging device
CANON KK4 citations63
US6157800ADec 5, 2000
Charging device using a magnetic brush contactable to a member to be charged and image forming apparatus using same
CANON KK3 citations63
US7424232B2Sep 9, 2008
Charging apparatus
CANON KK0 citations52
US6832062B2Dec 14, 2004
Charging apparatus, process cartridge and image forming apparatus having electroconductive particles charged in a nip between a charging member and a member to be charged
CANON KK0 citations52
US6788911B2Sep 7, 2004
Charging apparatus, process cartridge and image forming apparatus
CANON KK0 citations52