JPS556371A - Magnetic brush developing device - Google Patents

Magnetic brush developing device

Info

Publication number
JPS556371A
JPS556371A JP7910778A JP7910778A JPS556371A JP S556371 A JPS556371 A JP S556371A JP 7910778 A JP7910778 A JP 7910778A JP 7910778 A JP7910778 A JP 7910778A JP S556371 A JPS556371 A JP S556371A
Authority
JP
Japan
Prior art keywords
toner
replenishing
hopper
permanent magnet
magnet roll
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
JP7910778A
Other languages
Japanese (ja)
Other versions
JPS5654637B2 (en
Inventor
Keitaro Yamashita
Takaharu Goto
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.)
Proterial Ltd
Original Assignee
Hitachi Metals 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 Hitachi Metals Ltd filed Critical Hitachi Metals Ltd
Priority to JP7910778A priority Critical patent/JPS556371A/en
Publication of JPS556371A publication Critical patent/JPS556371A/en
Publication of JPS5654637B2 publication Critical patent/JPS5654637B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To replenish the toner stably by providing a replenishing permanent magnet roll in the toner hopper aside from a developing permanent magnet roll, detecting the toner volume on the non-magnetic sleeve and rotating the replenishing magnet roll through the utilization of the detection signal thereof. CONSTITUTION:A toner-replenishing permanent magnet roll 8 having a shaft 7 is rotatably provided above a developing permanent magnet roll 4 provided in the lower part of a large-size hopper 11 besides this roll. A cartridge type toner box 21 which is made large in size and removalbe is mounted to the hopper 11. A spring plate 23 is provided to the opening part 22 of the bottom part of the toner box 21 and is pushed up and opened by the member 11c of the drum side 11b when mounted to the hopper 11. When the volume of the toner stagnating on the surface of the developing sleeve 5 decreases, the member 10 moves to the position of the solid line. This moving state is detected witn, e.g., a microswitch or the like, whereby the toner-replenishing roll 8 is controlled of driving and the toner 2 replenished.
JP7910778A 1978-06-29 1978-06-29 Magnetic brush developing device Granted JPS556371A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7910778A JPS556371A (en) 1978-06-29 1978-06-29 Magnetic brush developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7910778A JPS556371A (en) 1978-06-29 1978-06-29 Magnetic brush developing device

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP56109674A Division JPS5756869A (en) 1981-07-14 1981-07-14 Magnetic brush development device

Publications (2)

Publication Number Publication Date
JPS556371A true JPS556371A (en) 1980-01-17
JPS5654637B2 JPS5654637B2 (en) 1981-12-26

Family

ID=13680666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7910778A Granted JPS556371A (en) 1978-06-29 1978-06-29 Magnetic brush developing device

Country Status (1)

Country Link
JP (1) JPS556371A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56113346U (en) * 1980-01-31 1981-09-01
JPS5745573A (en) * 1980-09-01 1982-03-15 Hitachi Metals Ltd Development device for magnetic toner
JPS58108552A (en) * 1981-12-22 1983-06-28 Canon Inc Process kit and its attaching and detaching means
JPS58108553A (en) * 1981-12-22 1983-06-28 Canon Inc Process kit
JPS58168067A (en) * 1982-03-29 1983-10-04 Canon Inc Developing device
JPS6175372A (en) * 1984-09-20 1986-04-17 Minolta Camera Co Ltd Magnetic brush developing device
JPS62187370A (en) * 1986-02-13 1987-08-15 Katsuragawa Denki Kk Electrophotographic device
JPS6383760A (en) * 1986-09-29 1988-04-14 Matsushita Electric Ind Co Ltd Detector for remaining amount of developer
JPS6383761A (en) * 1986-09-29 1988-04-14 Matsushita Electric Ind Co Ltd Developing device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4963963U (en) * 1972-09-13 1974-06-05
JPS5056948A (en) * 1973-09-17 1975-05-19
JPS5074347U (en) * 1973-11-05 1975-06-28
JPS5215798U (en) * 1975-07-23 1977-02-03
JPS5299832A (en) * 1976-02-16 1977-08-22 Olivetti & Co Spa Disposable toner cartridge for copying machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4963963U (en) * 1972-09-13 1974-06-05
JPS5056948A (en) * 1973-09-17 1975-05-19
JPS5074347U (en) * 1973-11-05 1975-06-28
JPS5215798U (en) * 1975-07-23 1977-02-03
JPS5299832A (en) * 1976-02-16 1977-08-22 Olivetti & Co Spa Disposable toner cartridge for copying machine

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56113346U (en) * 1980-01-31 1981-09-01
JPS5745573A (en) * 1980-09-01 1982-03-15 Hitachi Metals Ltd Development device for magnetic toner
JPS6118181B2 (en) * 1981-12-22 1986-05-10 Canon Kk
JPS58108553A (en) * 1981-12-22 1983-06-28 Canon Inc Process kit
JPS58108552A (en) * 1981-12-22 1983-06-28 Canon Inc Process kit and its attaching and detaching means
JPS6118182B2 (en) * 1981-12-22 1986-05-10 Canon Kk
JPS58168067A (en) * 1982-03-29 1983-10-04 Canon Inc Developing device
JPH0415951B2 (en) * 1982-03-29 1992-03-19 Canon Kk
JPS6175372A (en) * 1984-09-20 1986-04-17 Minolta Camera Co Ltd Magnetic brush developing device
JPS62187370A (en) * 1986-02-13 1987-08-15 Katsuragawa Denki Kk Electrophotographic device
JPS6383760A (en) * 1986-09-29 1988-04-14 Matsushita Electric Ind Co Ltd Detector for remaining amount of developer
JPS6383761A (en) * 1986-09-29 1988-04-14 Matsushita Electric Ind Co Ltd Developing device
JPH0520751B2 (en) * 1986-09-29 1993-03-22 Matsushita Electric Ind Co Ltd
JPH0520752B2 (en) * 1986-09-29 1993-03-22 Matsushita Electric Ind Co Ltd

Also Published As

Publication number Publication date
JPS5654637B2 (en) 1981-12-26

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