JPS5792358A - Developing device - Google Patents

Developing device

Info

Publication number
JPS5792358A
JPS5792358A JP16794980A JP16794980A JPS5792358A JP S5792358 A JPS5792358 A JP S5792358A JP 16794980 A JP16794980 A JP 16794980A JP 16794980 A JP16794980 A JP 16794980A JP S5792358 A JPS5792358 A JP S5792358A
Authority
JP
Japan
Prior art keywords
toner
roller
magnets
imae
entrance
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
JP16794980A
Other languages
Japanese (ja)
Inventor
Koji Sakamoto
Kazuo Kobayashi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP16794980A priority Critical patent/JPS5792358A/en
Publication of JPS5792358A publication Critical patent/JPS5792358A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Developing For Electrophotography (AREA)

Abstract

PURPOSE:To obtain a clear image free of ground fogging by supplying charged magnetic toner to a surface which has an electromagnetic latent imae by a supply roller and magnetic force and by collecting remaining toner by a potential difference in addition to magnetic force. CONSTITUTION:A developing roller 7 and a supply roller 6 are provided which rotate in the same direction with the surface of the photoreceptor 1, turning as shown by an arrow, of a dry type electronic copying machine. The roller 6 and 7 are both made of nonmagnetic materials and have incorporated magnets 8 and 9. A case for toner 3 has a toner exit 5 and an entrance 5'. As development starts, the toner 3 move to the developing roller 7 by the incorporated magnets 8 and 9 and, after being charged by the friction of a coating layer 11, is adsorbed to an electrostatic latent image, thus performing the development. The excessive toner 3 is collected efficiently through the rotations of both the rollers 6 and 7, the magnets 8 and 9, and bias voltages applied from power sources 12 and 13 in cooperation to return to the case 4 through the entrance 5'. Consequently, the tone is supplied adequately to obtain an imae free of ground fogging.
JP16794980A 1980-12-01 1980-12-01 Developing device Pending JPS5792358A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16794980A JPS5792358A (en) 1980-12-01 1980-12-01 Developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16794980A JPS5792358A (en) 1980-12-01 1980-12-01 Developing device

Publications (1)

Publication Number Publication Date
JPS5792358A true JPS5792358A (en) 1982-06-08

Family

ID=15859029

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16794980A Pending JPS5792358A (en) 1980-12-01 1980-12-01 Developing device

Country Status (1)

Country Link
JP (1) JPS5792358A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6348583A (en) * 1986-08-19 1988-03-01 Toshiba Corp Developing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6348583A (en) * 1986-08-19 1988-03-01 Toshiba Corp Developing device

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