JPS5491329A - Reversal development - Google Patents

Reversal development

Info

Publication number
JPS5491329A
JPS5491329A JP15904077A JP15904077A JPS5491329A JP S5491329 A JPS5491329 A JP S5491329A JP 15904077 A JP15904077 A JP 15904077A JP 15904077 A JP15904077 A JP 15904077A JP S5491329 A JPS5491329 A JP S5491329A
Authority
JP
Japan
Prior art keywords
sleeve
potential
power source
bias power
doctor
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.)
Granted
Application number
JP15904077A
Other languages
Japanese (ja)
Other versions
JPS6261956B2 (en
Inventor
Yutaka Ebi
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 JP15904077A priority Critical patent/JPS5491329A/en
Publication of JPS5491329A publication Critical patent/JPS5491329A/en
Publication of JPS6261956B2 publication Critical patent/JPS6261956B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Developing For Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE:To form an excellent picture image having no texture blotted by applying a potential of the same polarity and at least equal to the potential, which is impressed upon a sleeve, to a doctor, which is operative to regulate the thickness of an insulating toner layer immediately before the development of the sleeve, thereby to uniformly charge the toner layer. CONSTITUTION:There is arranged rotatably above a grounded conductive and nonmagnetic developing container 31 a conductive sleeve 36 which is located in the vicinity of the surface of a photosensitive drum 35. The sleeve 36 is connected with a DC bias power source V1 through a resistor R4. There is arranged above the other wall of the developing container through an insulating member 38 a conductive doctor 29 which has its one leading end located in the vicinity of the surface of the sleeve 36. The doctor 39 is connected with a DC bias power source V2 through a resistor R2. The bias power source V1 has the same polarity as that of the electrostatic latent image on the photosensitive element so that the potential close to that at that portion of the latent image, which has the highest charge density, is impressed upon the sleeve 36. On the other hand, the bias power source V2 supplies the dector 39 with the potential of the same polarity and at least equal to the potential applied to the sleeve.
JP15904077A 1977-12-28 1977-12-28 Reversal development Granted JPS5491329A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15904077A JPS5491329A (en) 1977-12-28 1977-12-28 Reversal development

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15904077A JPS5491329A (en) 1977-12-28 1977-12-28 Reversal development

Publications (2)

Publication Number Publication Date
JPS5491329A true JPS5491329A (en) 1979-07-19
JPS6261956B2 JPS6261956B2 (en) 1987-12-24

Family

ID=15684916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15904077A Granted JPS5491329A (en) 1977-12-28 1977-12-28 Reversal development

Country Status (1)

Country Link
JP (1) JPS5491329A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56154769A (en) * 1980-05-02 1981-11-30 Canon Inc Developing device
DE3140853A1 (en) * 1980-10-20 1982-06-16 Minolta Camera K.K., Osaka ELECTROPHOTOGRAPHIC COPIER
JPS57128365A (en) * 1981-01-30 1982-08-09 Minolta Camera Co Ltd Powder image transfer type electronic copier
JPS5837657A (en) * 1982-07-21 1983-03-04 Canon Inc Developing method and its apparatus
JPS63100751U (en) * 1986-12-19 1988-06-30
US6275675B1 (en) * 1999-09-14 2001-08-14 Lester E. Cornelius Electronically conducting segmented hopper construction for toner cartridge

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56154769A (en) * 1980-05-02 1981-11-30 Canon Inc Developing device
DE3140853A1 (en) * 1980-10-20 1982-06-16 Minolta Camera K.K., Osaka ELECTROPHOTOGRAPHIC COPIER
JPS57128365A (en) * 1981-01-30 1982-08-09 Minolta Camera Co Ltd Powder image transfer type electronic copier
JPH0314190B2 (en) * 1981-01-30 1991-02-26 Minolta Camera Kk
JPS5837657A (en) * 1982-07-21 1983-03-04 Canon Inc Developing method and its apparatus
JPS6316739B2 (en) * 1982-07-21 1988-04-11 Canon Kk
JPS63100751U (en) * 1986-12-19 1988-06-30
US6275675B1 (en) * 1999-09-14 2001-08-14 Lester E. Cornelius Electronically conducting segmented hopper construction for toner cartridge

Also Published As

Publication number Publication date
JPS6261956B2 (en) 1987-12-24

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