JPS6470778A - Image forming device - Google Patents

Image forming device

Info

Publication number
JPS6470778A
JPS6470778A JP62227670A JP22767087A JPS6470778A JP S6470778 A JPS6470778 A JP S6470778A JP 62227670 A JP62227670 A JP 62227670A JP 22767087 A JP22767087 A JP 22767087A JP S6470778 A JPS6470778 A JP S6470778A
Authority
JP
Japan
Prior art keywords
image
area
band
developing unit
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
JP62227670A
Other languages
Japanese (ja)
Inventor
Shinji Hanada
Kazumoto Tanaka
Noriyuki Ishihara
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP62227670A priority Critical patent/JPS6470778A/en
Publication of JPS6470778A publication Critical patent/JPS6470778A/en
Pending legal-status Critical Current

Links

Landscapes

  • Dry Development In Electrophotography (AREA)

Abstract

PURPOSE:To form a band-shaped toner image for replenishing toner with a simple and small-sized means by interrupting image exposing light on the image non-formed area of an image carrier and executing primary electrification to said area at a required electric potential so that the band-shaped toner image is formed. CONSTITUTION:A latent image is formed on the photosensitive drum 1 which is the image carrier by erasing an after image by means of a pre-exposure lamp 2, uniformly electrifying by means of a primary electrostatic charging unit 3 and exposing with the image exposing light E, etc., and it is developed in a developing unit 5. Meanwhile, when 1st and 2nd shutters 8 and 9 are controlled to be switched, the light E onto the non-image area of the drum 1 is interrupted and the primary electrification is executed to the non-image area at the electric potential below the developing bias voltage of a developing unit 5 with the pre-exposing light from the lamp 2 through the reflecting surface 8b of a shutter 8. Thus, the band-shaped toner image is formed on the non-image area of the drum 1 through the developing unit 5 and the performance of cleaning can be enhanced. And the replenishment of reused toner can be favorably executed with a simple and small-sized movable shutter means.
JP62227670A 1987-09-11 1987-09-11 Image forming device Pending JPS6470778A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62227670A JPS6470778A (en) 1987-09-11 1987-09-11 Image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62227670A JPS6470778A (en) 1987-09-11 1987-09-11 Image forming device

Publications (1)

Publication Number Publication Date
JPS6470778A true JPS6470778A (en) 1989-03-16

Family

ID=16864490

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62227670A Pending JPS6470778A (en) 1987-09-11 1987-09-11 Image forming device

Country Status (1)

Country Link
JP (1) JPS6470778A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61277978A (en) * 1985-06-04 1986-12-08 Canon Inc Image forming device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61277978A (en) * 1985-06-04 1986-12-08 Canon Inc Image forming device

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