JPS6466673A - Conductive roll - Google Patents

Conductive roll

Info

Publication number
JPS6466673A
JPS6466673A JP22448187A JP22448187A JPS6466673A JP S6466673 A JPS6466673 A JP S6466673A JP 22448187 A JP22448187 A JP 22448187A JP 22448187 A JP22448187 A JP 22448187A JP S6466673 A JPS6466673 A JP S6466673A
Authority
JP
Japan
Prior art keywords
photosensitive drum
elastic material
conductive elastic
material layer
generation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP22448187A
Other languages
Japanese (ja)
Inventor
Takashi Shichi
Koji Yamaguchi
Hiroyasu Kato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Riko Co Ltd
Original Assignee
Sumitomo Riko Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Riko Co Ltd filed Critical Sumitomo Riko Co Ltd
Priority to JP22448187A priority Critical patent/JPS6466673A/en
Publication of JPS6466673A publication Critical patent/JPS6466673A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

PURPOSE:To prevent the generation of friction, contamination and spark discharge, etc., on the surface of a photosensitive drum by coating the surface of a conductive elastic material layer, which is formed concentrically on the outside circumference of a shaft and has specific hardness, with a dielectric layer consisting of a thermoplastic resin contg. lubricating powder having specific electric resistance. CONSTITUTION:The conductive elastic material layer 12 having <=40 JIS-A hardness is formed concentrically on the outside peripheral face of the metallic shaft, the shaft part 11 of which is projected at both ends. The dielectric layer 13 consisting of the thermoplastic resin in which the lubricating powder having '10<5>OMEGA.cm electric resistance is dispersed and incorporated is coated on the surface of the conductive elastic material layer 12. The surface of the conductive elastic material layer 12 is slightly softer than the surface of the photosensitive drum and the dielectric layer 13 contg. the lubricating powder having >=10<5>OMEGA.cm electric resistance is coated and, therefore, the generation of the spark discharge between the roll and the surface of the photosensitive drum is obviated and the friction and flawing of the photosensitive drum surface are prevented. The generation of the contamination and the increase in driving torque are prevented.
JP22448187A 1987-09-08 1987-09-08 Conductive roll Pending JPS6466673A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22448187A JPS6466673A (en) 1987-09-08 1987-09-08 Conductive roll

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22448187A JPS6466673A (en) 1987-09-08 1987-09-08 Conductive roll

Publications (1)

Publication Number Publication Date
JPS6466673A true JPS6466673A (en) 1989-03-13

Family

ID=16814473

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22448187A Pending JPS6466673A (en) 1987-09-08 1987-09-08 Conductive roll

Country Status (1)

Country Link
JP (1) JPS6466673A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01179959A (en) * 1988-01-11 1989-07-18 Canon Inc Contact electrostatic charger
JPH01204081A (en) * 1988-02-09 1989-08-16 Canon Inc Electrostatic charging device
JPH02311866A (en) * 1989-05-27 1990-12-27 Tokai Rubber Ind Ltd Conductive roll
JPH02311871A (en) * 1989-05-27 1990-12-27 Tokai Rubber Ind Ltd Roll
JPH03293682A (en) * 1990-04-12 1991-12-25 Canon Inc Electrically charging member
EP0629928A2 (en) * 1993-05-31 1994-12-21 Ricoh Company, Ltd Roller charging apparatus and image forming apparatus using the same
EP0636949A2 (en) * 1993-07-30 1995-02-01 Canon Kabushiki Kaisha Charging member, charging device and process cartridge detachably mountable to image forming apparatus
JPH08171234A (en) * 1995-06-26 1996-07-02 Canon Inc Picture forming method

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01179959A (en) * 1988-01-11 1989-07-18 Canon Inc Contact electrostatic charger
JPH01204081A (en) * 1988-02-09 1989-08-16 Canon Inc Electrostatic charging device
JPH02311866A (en) * 1989-05-27 1990-12-27 Tokai Rubber Ind Ltd Conductive roll
JPH02311871A (en) * 1989-05-27 1990-12-27 Tokai Rubber Ind Ltd Roll
JPH03293682A (en) * 1990-04-12 1991-12-25 Canon Inc Electrically charging member
EP0629928A3 (en) * 1993-05-31 1998-07-29 Ricoh Company, Ltd Roller charging apparatus and image forming apparatus using the same
EP0629928A2 (en) * 1993-05-31 1994-12-21 Ricoh Company, Ltd Roller charging apparatus and image forming apparatus using the same
EP0636949A2 (en) * 1993-07-30 1995-02-01 Canon Kabushiki Kaisha Charging member, charging device and process cartridge detachably mountable to image forming apparatus
EP0843231A2 (en) * 1993-07-30 1998-05-20 Canon Kabushiki Kaisha Charging member, charging device and process cartridge detachably mountable to image forming apparatus
US5765077A (en) * 1993-07-30 1998-06-09 Canon Kabushiki Kaisha Charging member, charging device and process cartridge detachably mountable to image forming apparatus
EP0636949A3 (en) * 1993-07-30 1995-03-08 Canon Kk
EP0843231A3 (en) * 1993-07-30 1998-09-16 Canon Kabushiki Kaisha Charging member, charging device and process cartridge detachably mountable to image forming apparatus
JPH08171234A (en) * 1995-06-26 1996-07-02 Canon Inc Picture forming method

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