JPS5596967A - Developer laminar state detector - Google Patents

Developer laminar state detector

Info

Publication number
JPS5596967A
JPS5596967A JP517379A JP517379A JPS5596967A JP S5596967 A JPS5596967 A JP S5596967A JP 517379 A JP517379 A JP 517379A JP 517379 A JP517379 A JP 517379A JP S5596967 A JPS5596967 A JP S5596967A
Authority
JP
Japan
Prior art keywords
toner
sleeve
electrode
laminar state
developer
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
JP517379A
Other languages
Japanese (ja)
Other versions
JPS6337383B2 (en
Inventor
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 JP517379A priority Critical patent/JPS5596967A/en
Publication of JPS5596967A publication Critical patent/JPS5596967A/en
Publication of JPS6337383B2 publication Critical patent/JPS6337383B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To accurately and surely detect developer laminar state by combining an electrode member, impedance element and plural comparators. CONSTITUTION:A toner laminar state detecting circuit 11 is constituted by a detecting resistance 12, an amplifier 13, the 1st, the 2nd threshold power sources 14, 16, 1st, 2nd comparators 15, 17 and the 1st, the 2nd display devices 18, 19, and is connected to the sleeve 3 of a developing device 2 by way of a switch SW2. Then, when switches SW1, SW2 are placed in the detecting position, the current from a power source 10 flows through an electrode 19, a toner layer 8, a sleeve 3 and a resistance 12 and fluctuates according to the contact state of a toner layer 8 and an electrode 9. When the toner layer 8 becomes thinner than the specified value, the signal from the 1st comparator 15 operates the 1st display device 18 and when the toner sticks on the sleeve 3, the signal from the 2nd comparator 17 operates the 2nd display device 19, thereby announcing toner deficiency and toner sticking respectively.
JP517379A 1979-01-19 1979-01-19 Developer laminar state detector Granted JPS5596967A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP517379A JPS5596967A (en) 1979-01-19 1979-01-19 Developer laminar state detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP517379A JPS5596967A (en) 1979-01-19 1979-01-19 Developer laminar state detector

Publications (2)

Publication Number Publication Date
JPS5596967A true JPS5596967A (en) 1980-07-23
JPS6337383B2 JPS6337383B2 (en) 1988-07-25

Family

ID=11603839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP517379A Granted JPS5596967A (en) 1979-01-19 1979-01-19 Developer laminar state detector

Country Status (1)

Country Link
JP (1) JPS5596967A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109965A (en) * 1980-12-26 1982-07-08 Toshiba Corp Fur brush developing device
JP2006300988A (en) * 2005-04-15 2006-11-02 Konica Minolta Business Technologies Inc Image forming apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527651A (en) * 1966-10-20 1970-09-08 Addressograph Multigraph Method of and apparatus for developing electrostatic images
JPS50122277A (en) * 1974-02-28 1975-09-25
JPS53110845A (en) * 1977-03-09 1978-09-27 Ricoh Co Ltd Detector of residual amount of toner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527651A (en) * 1966-10-20 1970-09-08 Addressograph Multigraph Method of and apparatus for developing electrostatic images
JPS50122277A (en) * 1974-02-28 1975-09-25
JPS53110845A (en) * 1977-03-09 1978-09-27 Ricoh Co Ltd Detector of residual amount of toner

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109965A (en) * 1980-12-26 1982-07-08 Toshiba Corp Fur brush developing device
JPS6356990B2 (en) * 1980-12-26 1988-11-09 Tokyo Shibaura Electric Co
JP2006300988A (en) * 2005-04-15 2006-11-02 Konica Minolta Business Technologies Inc Image forming apparatus
JP4687212B2 (en) * 2005-04-15 2011-05-25 コニカミノルタビジネステクノロジーズ株式会社 Image forming apparatus

Also Published As

Publication number Publication date
JPS6337383B2 (en) 1988-07-25

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