JP2000242152A5 - - Google Patents

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Publication number
JP2000242152A5
JP2000242152A5 JP1999042216A JP4221699A JP2000242152A5 JP 2000242152 A5 JP2000242152 A5 JP 2000242152A5 JP 1999042216 A JP1999042216 A JP 1999042216A JP 4221699 A JP4221699 A JP 4221699A JP 2000242152 A5 JP2000242152 A5 JP 2000242152A5
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JP
Japan
Prior art keywords
image forming
toner
image
transfer
specifically
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
JP1999042216A
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Japanese (ja)
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JP2000242152A (en
Filing date
Publication date
Application filed filed Critical
Priority to JP11042216A priority Critical patent/JP2000242152A/en
Priority claimed from JP11042216A external-priority patent/JP2000242152A/en
Publication of JP2000242152A publication Critical patent/JP2000242152A/en
Publication of JP2000242152A5 publication Critical patent/JP2000242152A5/ja
Pending legal-status Critical Current

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Description

【0012】
このような技術的手段において、本発明の対象となるカラー画像形成装置は、複数の画像形成ユニット4備えた所謂タンデム型の態様のものである。そして、画像形成ユニット4の配設数については、必要な色数によって適宜選定して差し支えない。
また、像担持体1としては、潜像形成手段2による静電潜像を形成担持するものであれば、感光体、誘電体など適宜選定して差し支えなく、その形態についてもドラム状、ベルト状を問わない。
また、潜像形成手段2については、静電潜像を形成するものであれば、帯電、露光工程を経た方式、あるいは、イオン流による潜像書き込み工程を含む方式など適宜選定して差し支えない。
[0012]
In such technical means, the color image forming apparatus to which the present invention is applied is a so-called tandem type having a plurality of image forming units 4. The number of image forming units 4 may be appropriately selected depending on the required number of colors.
Further, as the image carrier 1, as long as the electrostatic latent image is formed and carried by the latent image forming means 2, a photoconductor, a dielectric, etc. may be appropriately selected, and the form thereof is also a drum shape or a belt shape. It does not matter.
The latent image forming means 2 may be appropriately selected from a system which has been subjected to an electrification process, an exposure process or a system including a latent image writing process by an ion flow, as long as it forms an electrostatic latent image.

【0021】
更に、本発明は、像担持体1上に逆転写されたトナーを除去する態様そのものをも対象とする。
すなわち、本発明は、像担持体1(例えば1a〜1d)と、当該像担持体1上に静電潜像を形成する潜像形成手段2(例えば2a〜2d)と、当該像担持体1上に形成された静電潜像をトナーで現像する現像手段3(例えば3a〜3d)とを具備する複数の画像形成ユニット4(例えば4a〜4d)と、前記各画像形成ユニット4に対向する部位を循環搬送される記録搬送体5と、前記記録搬送体5に直接若しくは記録材9を介して前記各画像形成ユニット4で形成されたトナー像を転写する複数の転写装置6(例えば6a〜6d)とを備え、前記複数の画像形成ユニット4のうち、前記記録搬送体5の移動方向上流側からみて少なくとも2番目以降の画像形成ユニット4(例えば4b〜4d)の像担持体1(例えば1b〜1d)の転写部下流側に、当該転写部にて前記記録搬送体5側から像担持体1上に逆転写したトナーを除去する逆転写トナー除去手段を配設した態様ともいえる。
ここで、トナーを効率的に使用するという観点からすれば、前記複数の画像形成ユニット4の各転写部を通過した各像担持体1上に残存するトナーのうち、当該転写部にて当該像担持体1上から前記記録搬送体5に転写されずに残存したトナーを現像手段3で回収することが好ましい。
[0021]
Furthermore, the present invention is also directed to an aspect of removing the toner reversely transferred onto the image carrier 1 itself.
That is, according to the present invention, an image carrier 1 (for example, 1a to 1d), latent image forming means 2 (for example 2a to 2d) for forming an electrostatic latent image on the image carrier 1, and the image carrier 1 A plurality of image forming units 4 (e.g. 4a to 4d) comprising developing means 3 (e.g. 3a to 3d) for developing the electrostatic latent image formed thereon with toner, and the respective image forming units 4 A plurality of transfer devices 6 (for example, 6a to 6a) for transferring the toner images formed by the respective image forming units 4 directly or through the recording material 9 to the recording conveyance body 5 and the recording conveyance body 5 6d), and among the plurality of image forming units 4, the image carrier 1 (for example, 4b to 4d) of at least the second and subsequent image forming units 4 (for example, 4b to 4d) as viewed from the moving direction upstream of the recording 1b to 1d) under the transfer part On the side, it can be said that embodiments were provided with reverse transcription toner removing means for removing the toner reverse transcribed onto the image bearing member 1 from the recording carrier 5 side at the transfer unit.
Here, from the viewpoint of efficiently using the toner, among the toners remaining on the respective image carriers 1 which have passed through the respective transfer portions of the plurality of image forming units 4, the image concerned in the relevant transfer portion It is preferable that the toner remaining on the carrier 1 without being transferred to the recording and conveying body 5 is recovered by the developing means 3.

【0051】
尚、シアン画像形成ユニット100Cでは一次転写時にイエロの逆転写トナーの他にマゼンタの逆転写トナーも発生し、また、ブラック画像形成ユニット100Kでは一次転写時にイエロ、マゼンタ、シアンの逆転写トナーが発生する点でイエロ画像形成ユニット100Yとは異なるが、いずれの場合においても、逆転写した他色のトナーは本来の帯電極性とは逆極性に帯電したものであるため、各画像形成ユニット100C、100Kに夫々設けられた逆極性トナー除去装置107C、107Kによって除去することが可能である。
[0051]
Incidentally, in the cyan image forming unit 100C, in addition to yellow reverse transfer toner, reverse transfer toner of magenta is also generated at the time of primary transfer, and in the black image forming unit 100K, reverse transfer toner of yellow, magenta and cyan is generated at the time of primary transfer. Although different from the yellow image forming unit 100Y in that point, in any case, since the toner of the other color reversely transferred is charged to the reverse polarity to the original charging polarity, each image forming unit 100C, 100K It is possible to remove the toner by reverse polarity toner removing devices 107C and 107K provided respectively.

【0067】
本実施の形態において、各色成分の画像形成ユニット100(具体的には100Y、100M、100C、100K)は、矢線A方向に回転する像担持体としての感光体ドラム101(具体的には101Y、101M、101C、101K)の周囲に、感光体ドラム101が帯電される一様帯電装置102(具体的には102Y、102M、102C、102K)、感光体ドラム101上に静電潜像が書き込まれるレーザ露光装置103(具体的には103Y、103M、103C、103K、尚、図中レーザビームを符号Bmで表す)、各色成分トナーが収容されて感光体ドラム101上の静電潜像が可視像化される現像装置104(具体的には104Y、104M、104C、104K)、感光体ドラム101上の各色成分トナー像Tが中間転写ベルト110に転写される転写手段としての一次転写ロール105(具体的には105Y、105M、105C、105K)、転写域通過後の感光体ドラム101の表面電位を低減させる除電ランプ106(具体的には106Y、106M、106C、106K)等の電子写真デバイスを順次配設したものである。
[0067]
In the present embodiment, the image forming units 100 (specifically, 100Y, 100M, 100C, and 100K) of the respective color components are the photosensitive drums 101 (specifically, 101Y) as image carriers rotating in the direction of arrow A. , 101M, 101C, and 101K), and electrostatic latent images are written on the photosensitive drum 101, and the uniform charging device 102 (specifically, 102Y, 102M, 102C, and 102K) in which the photosensitive drum 101 is charged. Laser exposure devices 103 (specifically, 103Y, 103M, 103C, 103K, where a laser beam is indicated by a symbol Bm in the figure), each color component toner is contained, and an electrostatic latent image on the photosensitive drum 101 is acceptable. Each color component toner image T on the developing device 104 (specifically, 104Y, 104M, 104C, 104K) to be visualized is formed on the photosensitive drum 101. During transfer (specifically 105Y, 105M, 105C, 105K) primary transfer roll 105 as a transfer means to be transferred to the belt 110, a discharge lamp 106 (specifically to reduce the surface potential of the photosensitive drum 101 after the transfer pass Specifically, electrophotographic devices such as 106Y, 106M, 106C, 106K) are sequentially disposed.

JP11042216A 1999-02-19 1999-02-19 Color image forming device Pending JP2000242152A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11042216A JP2000242152A (en) 1999-02-19 1999-02-19 Color image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11042216A JP2000242152A (en) 1999-02-19 1999-02-19 Color image forming device

Publications (2)

Publication Number Publication Date
JP2000242152A JP2000242152A (en) 2000-09-08
JP2000242152A5 true JP2000242152A5 (en) 2005-02-24

Family

ID=12629855

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11042216A Pending JP2000242152A (en) 1999-02-19 1999-02-19 Color image forming device

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JP (1) JP2000242152A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6721534B2 (en) 2001-06-08 2004-04-13 Ricoh Company, Limited Image formation method and image formation apparatus
JP4803622B2 (en) * 2001-06-27 2011-10-26 桂川電機株式会社 Image forming apparatus
JP4265888B2 (en) 2002-06-12 2009-05-20 株式会社リコー Image forming apparatus
EP1431843A3 (en) 2002-08-30 2004-09-15 Ricoh Company, Ltd. Cleanerless image forming apparatus and process cartridge for use in the same
EP1429209A3 (en) 2002-09-19 2004-08-25 Ricoh Company Image forming apparatus and process cartridge for use in the same
US20040248025A1 (en) 2003-02-06 2004-12-09 Seiko Epson Corporation Toner, production method thereof, and image forming apparatus using same
US7317883B2 (en) 2005-06-27 2008-01-08 Kabushiki Kaisha Toshiba Color image forming apparatus with at least two stages of image forming units
US7539431B2 (en) * 2006-06-29 2009-05-26 Kabushiki Kaisha Toshiba Image forming apparatus and techniques for collecting toner

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