JPS5473642A - Developing apparatus - Google Patents

Developing apparatus

Info

Publication number
JPS5473642A
JPS5473642A JP14098877A JP14098877A JPS5473642A JP S5473642 A JPS5473642 A JP S5473642A JP 14098877 A JP14098877 A JP 14098877A JP 14098877 A JP14098877 A JP 14098877A JP S5473642 A JPS5473642 A JP S5473642A
Authority
JP
Japan
Prior art keywords
developer
recording body
electromagnet
rear end
conveyor drum
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
JP14098877A
Other languages
Japanese (ja)
Inventor
Satoru Tomita
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 JP14098877A priority Critical patent/JPS5473642A/en
Publication of JPS5473642A publication Critical patent/JPS5473642A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

PURPOSE: To prevent back soiling of sheet-like recording boby, by controlling an electromagnet so that the magnetic brush may be formed only when the sheet-like recording body is at the position capable of contacting the developer, and thereby preventing the developer from touching the conveyor drum.
CONSTITUTION: A recording body 2 is conveyed by a conveyor drum 8, and when the end thereof reaches the minimum gap position 28 between the sleeve 14 and the conveyor drum 8, an electromagnet 23 is energized so that the developer reaches the position 28 above the sleeve 14. When the rear end of the recording body 2 passes through the position 28, the rear end of the developer is stopped to reach this position also. For this purpose, a phototube device 29 to detect the front end and the rear end of the recording body 2 is provided in the vicinity of a guide plate 7, and the power supply to the electromagnet 23 is controlled by a control part 31 connected to a detecting part 30, hence a proper timing is taken.
COPYRIGHT: (C)1979,JPO&Japio
JP14098877A 1977-11-24 1977-11-24 Developing apparatus Pending JPS5473642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14098877A JPS5473642A (en) 1977-11-24 1977-11-24 Developing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14098877A JPS5473642A (en) 1977-11-24 1977-11-24 Developing apparatus

Publications (1)

Publication Number Publication Date
JPS5473642A true JPS5473642A (en) 1979-06-13

Family

ID=15281519

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14098877A Pending JPS5473642A (en) 1977-11-24 1977-11-24 Developing apparatus

Country Status (1)

Country Link
JP (1) JPS5473642A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61174574A (en) * 1985-01-29 1986-08-06 Konishiroku Photo Ind Co Ltd Developing device
JP2006267287A (en) * 2005-03-22 2006-10-05 Fuji Xerox Co Ltd Developing device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61174574A (en) * 1985-01-29 1986-08-06 Konishiroku Photo Ind Co Ltd Developing device
JPH0519707B2 (en) * 1985-01-29 1993-03-17 Konishiroku Photo Ind
JP2006267287A (en) * 2005-03-22 2006-10-05 Fuji Xerox Co Ltd Developing device

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