JPS6482069A - Developing device for copying machine - Google Patents

Developing device for copying machine

Info

Publication number
JPS6482069A
JPS6482069A JP62241643A JP24164387A JPS6482069A JP S6482069 A JPS6482069 A JP S6482069A JP 62241643 A JP62241643 A JP 62241643A JP 24164387 A JP24164387 A JP 24164387A JP S6482069 A JPS6482069 A JP S6482069A
Authority
JP
Japan
Prior art keywords
blocking plate
closing
angle
developer
roller
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
JP62241643A
Other languages
Japanese (ja)
Inventor
Masahito Asanuma
Masatoshi Kaneshige
Hideaki Hagiwara
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP62241643A priority Critical patent/JPS6482069A/en
Priority to US07/216,359 priority patent/US4914481A/en
Priority to DE8888110958T priority patent/DE3869496D1/en
Priority to EP88110958A priority patent/EP0298504B1/en
Publication of JPS6482069A publication Critical patent/JPS6482069A/en
Pending legal-status Critical Current

Links

Landscapes

  • Magnetic Brush Developing In Electrophotography (AREA)
  • Color Electrophotography (AREA)

Abstract

PURPOSE:To secure switching between a development and a nondevelopment state and to cut stable napping by providing a blocking plate to a passage which supplies a developer to a development part, opening and closing the passage and making the closing angle of the blocking plate larger than the opening angle. CONSTITUTION:The developer is supplied to a developing roller 22 through an agitating roller 25, and sent to a conveyor roller 23 after the end and supplied again to the roller 25 along a scraping plate 26. When development becomes unnecessary, the blocking plate 38 rotates by 90 deg. through a spring clutch to close supply passages 35a and 35b. At this time, when the opening angle and closing angle of the blocking plate 38 are equal to each other, the variance of the clutch part causes variance at the stop position of the blocking plate 28 to disable a flow of the developer to be cut completely. On the other hand, the closing angle is set larger than the opening angle to eliminate the influence of variation in the stop position of the closing plate, thereby cutting napping stably.
JP62241643A 1987-07-09 1987-09-25 Developing device for copying machine Pending JPS6482069A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP62241643A JPS6482069A (en) 1987-09-25 1987-09-25 Developing device for copying machine
US07/216,359 US4914481A (en) 1987-07-09 1988-07-07 Developing apparatus
DE8888110958T DE3869496D1 (en) 1987-07-09 1988-07-08 DEVELOPMENT DEVICE.
EP88110958A EP0298504B1 (en) 1987-07-09 1988-07-08 Developing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62241643A JPS6482069A (en) 1987-09-25 1987-09-25 Developing device for copying machine

Publications (1)

Publication Number Publication Date
JPS6482069A true JPS6482069A (en) 1989-03-28

Family

ID=17077366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62241643A Pending JPS6482069A (en) 1987-07-09 1987-09-25 Developing device for copying machine

Country Status (1)

Country Link
JP (1) JPS6482069A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5987280A (en) * 1994-03-18 1999-11-16 Fujitsu Limited Developing device for electrostatic latent image

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5987280A (en) * 1994-03-18 1999-11-16 Fujitsu Limited Developing device for electrostatic latent image

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