JPH01113771A - Color electrophotography method - Google Patents

Color electrophotography method

Info

Publication number
JPH01113771A
JPH01113771A JP62270664A JP27066487A JPH01113771A JP H01113771 A JPH01113771 A JP H01113771A JP 62270664 A JP62270664 A JP 62270664A JP 27066487 A JP27066487 A JP 27066487A JP H01113771 A JPH01113771 A JP H01113771A
Authority
JP
Japan
Prior art keywords
photoreceptor
developing
cyan
toner
color
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
JP62270664A
Other languages
Japanese (ja)
Other versions
JP2825809B2 (en
Inventor
Hajime Yamamoto
肇 山本
Kazunori Kitagaki
北垣 和紀
Masahiko Nakamura
政彦 中村
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62270664A priority Critical patent/JP2825809B2/en
Priority to US07/261,072 priority patent/US4949125A/en
Priority to CA000581267A priority patent/CA1315611C/en
Priority to KR8813967A priority patent/KR920009158B1/en
Priority to EP88310063A priority patent/EP0314457B1/en
Priority to DE3850631T priority patent/DE3850631T2/en
Publication of JPH01113771A publication Critical patent/JPH01113771A/en
Application granted granted Critical
Publication of JP2825809B2 publication Critical patent/JP2825809B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To attain a red color with high color purity by exposing AC corona to a photosensitive body after the developing stage of magenta and in the electrification stage of cyan in case of transferring on paper after forming a color image on the photosensitive body. CONSTITUTION:The black signal of a negative is exposed on the photosensitive body 40 with a semiconductor laser 42 so as to form an electrostatic latent image. Thereafter, signal light corresponding to yellow is exposed to form the electrostatic latent image of yellow. Next, the electrostatic latent image of magenta is formed by electrifying the photosensitive body 40 by a corona electrifying device 41 without destaticizing said body 40. Then, the photosensitive body 40 is made to pass a cyan developing device 28 and a black developing device 38 in non-developing states. Next, it is exposed by an AC corona electrifying device 44 to form the electrostatic latent image of cyan, so that the color image can be completed. After transferring the color toner image obtained on the photosensitive body 40 onto paper 46 by a transfer electrifying device 45, the image is fixed by heat by a fixing unit 47.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、カラー複写機あるいはプリンタなどのハード
コピー装置に利用できるカラー電子写真方法に関するも
のである。、 従来の技術 近年、帯電・露光・現像を複数回繰り返して電子写真感
光体(以下、感光体という)上に色の異なる複数のトナ
ー像を形成した後、トナー像を紙に一括転写してカラー
画像を得るカラー電子写真方法が盛んに検討されている
。この方法は、従来のカラー電子写真法と異なり、転写
ドラムがなく装置を小型化できるという利点を有してい
る。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a color electrophotographic method that can be used in hard copy devices such as color copying machines and printers. , Conventional technology In recent years, charging, exposure, and development are repeated multiple times to form multiple toner images of different colors on an electrophotographic photoreceptor (hereinafter referred to as photoreceptor), and then the toner images are transferred all at once to paper. Color electrophotographic methods for obtaining color images are being actively studied. This method differs from conventional color electrophotography methods in that it does not require a transfer drum and has the advantage that the apparatus can be miniaturized.

この種のカラー電子写真装置として、例えば、発明者ら
が特願昭62−4367号に提案した装置がある。以下
、この発明の実施例について第2図を用いて説明する。
An example of this type of color electrophotographic apparatus is an apparatus proposed by the inventors in Japanese Patent Application No. 62-4367. Hereinafter, an embodiment of the present invention will be described using FIG. 2.

現像器l、2.3.4は直流電界でトナーを飛しょうさ
せる非接触型の非磁性l成分現像器で、現像ローラと接
触した導電性のファーブラシ5.6.7.8でトナーを
摩擦帯電し、アルミニウム製の現像ローラ9.1O11
1,12上に、ブレード13.14.15.16により
トナーの薄層を形成する構成になっている。現像器lに
はイエロ(Y)、現像器2にはマゼンタ(M)、現像器
3にはシアン(C)、現像器4には黒(Bk)の絶縁性
トナーが入っている。そして現像ローラ9.10,11
 12と感光体17との間隙(現像ギャップ)を一定に
して各現像器を感光体170周辺に対向設置している。
The developer 1, 2.3.4 is a non-contact non-magnetic 1-component developer that uses a DC electric field to scatter the toner, and the toner is removed using a conductive fur brush 5.6.7.8 that is in contact with the developing roller. Frictionally charged, aluminum developing roller 9.1O11
1, 12, a thin layer of toner is formed by blades 13, 14, 15, 16. The developing device 1 contains yellow (Y) insulating toner, the developing device 2 contains magenta (M), the developing device 3 contains cyan (C), and the developing device 4 contains insulating toner of black (Bk). and developing rollers 9, 10, 11
12 and the photoreceptor 17 (developing gap) is kept constant, and the developing units are disposed facing each other around the photoreceptor 170.

各現像器は現像時には感光体に近接し、非現像時には離
間する離接機構が取り付けられている。現像器の仕様及
び現像条件並びにトナーの物性を以下に示す。
Each developing device is attached with a separation mechanism that brings it close to the photoreceptor during development and separates it when not developing. The specifications and development conditions of the developer and the physical properties of the toner are shown below.

現像器の仕様及び現像条件 現像ローラの直径:16+n+s 現像ローラの周速: 150we/ S現像ローラの回
転方向:感光体と逆方向現像ローラの上のトナー層厚:
30μm現像ギャップ(現像ローラ表面と、感光体表面
間のギャップ):現像時150μm、非現像時700μ
m トナーの物性 トナー電荷量 :+3μC/g 平均粒径   :1071m 比誘電率   :約2 感光体として赤外領域に長波長増感した直径100閤の
無定型5e−Te感光体ドラ1%17(感光層の厚み6
0μ【n、比誘電率6.3)を用い、周速150ttm
/Sで回転させる。この感光体17を帯電器1B(スコ
ロトロン帯電器、コロナ電圧:+7kV、グリッド電圧
: 820V)により表面電位+700■に帯電させる
。次に、波長670止の発光ダイオードアレイ19を発
光させ自己収束性ロッドレンズアレイ20(日本板硝子
株式会社製、セルフォックレンズアレイ5LA−20)
を通して露光する。このとき、感光体面上での光強度は
、2.2μJ/cm’であった。この発光ダイオードア
レイ19を用いて、感光体17上にネガのイエ自信号を
露光し、静電潜像を形成した。前記潜像を現像ローラ9
に+600vを印加した現像状態のイエロの現像器lで
反転現像した後、感光体17を非現像状態のマゼンタ現
像器2とシアン現像器3および黒現像器4に通過させ、
イエロのトナー像を形成する。
Developing unit specifications and developing conditions Developing roller diameter: 16+n+s Developing roller circumferential speed: 150we/S Developing roller rotation direction: Opposite to photoconductor Toner layer thickness on developing roller:
30μm Development gap (gap between the development roller surface and the photoreceptor surface): 150μm during development, 700μm when not developed
m Physical properties of toner Toner charge amount: +3μC/g Average particle size: 1071m Relative dielectric constant: Approximately 2 As a photoreceptor, an amorphous 5e-Te photoreceptor drum with a diameter of 100 mm and sensitized to long wavelengths in the infrared region is used. Photosensitive layer thickness 6
0 μ [n, relative dielectric constant 6.3), circumferential speed 150 ttm
/S to rotate. This photoreceptor 17 is charged to a surface potential of +700 cm by a charger 1B (scorotron charger, corona voltage: +7 kV, grid voltage: 820 V). Next, the light emitting diode array 19 with a wavelength of 670 stops is caused to emit light, and the self-focusing rod lens array 20 (manufactured by Nippon Sheet Glass Co., Ltd., SELFOC Lens Array 5LA-20)
Exposure through. At this time, the light intensity on the photoreceptor surface was 2.2 μJ/cm'. Using this light emitting diode array 19, a negative yellow light signal was exposed onto the photoreceptor 17 to form an electrostatic latent image. The latent image is transferred to the developing roller 9
After reversal development is performed in a yellow developing device 1 in a developing state to which +600V is applied to the photoreceptor 17, the photoreceptor 17 is passed through a magenta developing device 2, a cyan developing device 3, and a black developing device 4 in a non-developing state.
Forms a yellow toner image.

次に、再びコロナ帯電器18で感光体17を+850v
に帯電する。そののち感光体17に発光ダイオードアレ
イ19によりマゼンタに対応する信号光を露光しマゼン
タの静電潜像を形成する。
Next, use the corona charger 18 again to charge the photoreceptor 17 to +850V.
is charged with electricity. Thereafter, the photoreceptor 17 is exposed to signal light corresponding to magenta by the light emitting diode array 19 to form a magenta electrostatic latent image.

次に、感光体17を非現像状態のイエロ現像器l、現像
ローラ10に+700■を印加した現像状態のマゼンタ
の現像器2および非現像状態のシアン現像器3および黒
現像器4に通過させてマゼンタのトナー像を形成する。
Next, the photoreceptor 17 is passed through a yellow developing device 1 in a non-developing state, a magenta developing device 2 in a developing state in which +700■ is applied to the developing roller 10, and a cyan developing device 3 and a black developing device 4 in a non-developing state. to form a magenta toner image.

次に、再びコロナ帯電器18によって感光体17を+8
80vに帯電する。その後、発光ダイオードアレイ19
によりシアンに対応する信号光を露光しシアンの静電潜
像を形成する。次に、感光体17を非現像状態のイエロ
現像器lおよびマゼンタの現像器2、現像ローラ11に
+800vを印加した現像状態のシアンの現像器3に通
過させてシアンのトナー像を形成する。その後、感光体
17を非現像状態の黒現像器4に通過させる。
Next, the photoreceptor 17 is charged to +8 again by the corona charger 18.
Charge to 80v. After that, the light emitting diode array 19
A cyan electrostatic latent image is formed by exposing signal light corresponding to cyan. Next, the photoreceptor 17 is passed through a yellow developing device 1 in a non-developing state, a magenta developing device 2, and a cyan developing device 3 in a developing state in which +800V is applied to the developing roller 11 to form a cyan toner image. Thereafter, the photoreceptor 17 is passed through the black developing device 4 in a non-developing state.

次に、再びコロナ帯電器18によって感光体17を+8
80vに帯電する。その後、発光ダイオードアレイ19
により黒に対応する信号光を露光し黒の静電潜像を形成
する。次に、感光体17を非現像状態のイエロ現像器l
、マゼンタの現像器2およびシアンの現像器3、現像ロ
ーラ12に+800vを印加した現像状態の黒現像器4
に通過させて黒のトナー像を形成する。
Next, the photoreceptor 17 is charged to +8 again by the corona charger 18.
Charge to 80v. After that, the light emitting diode array 19
A black electrostatic latent image is formed by exposing signal light corresponding to black. Next, the photoreceptor 17 is transferred to a yellow developing device l in a non-developing state.
, a magenta developing device 2, a cyan developing device 3, and a black developing device 4 in a developing state with +800V applied to the developing roller 12.
to form a black toner image.

こうして感光体17上に得られたカラートナー像を転写
帯電器21によって紙22に転写した後、定着器23に
より熱定着する。一方、転写後、感光体17の表面を、
クリーニング前帯電器24(コロナ電圧+5.5kV)
でプラスに帯電した後、−150Vの電圧を印加した導
電性ファーブラシ25を感光体17に圧接しクリーニン
グする。
The color toner image thus obtained on the photoreceptor 17 is transferred onto paper 22 by a transfer charger 21, and then thermally fixed by a fixing device 23. On the other hand, after the transfer, the surface of the photoreceptor 17 is
Pre-cleaning charger 24 (corona voltage +5.5kV)
After being positively charged, the conductive fur brush 25 to which a voltage of -150V has been applied is brought into pressure contact with the photoreceptor 17 for cleaning.

発明が解決しようとする間居点 この方法で、セレン系感光体を繰り返し連続して像形成
すると、イエロとマゼンタのトナーの付着した赤の部分
は、露光していないにも閏わらずシアントナーが現像付
着し、次第に赤の色純度が低下することが分かった。
The problem that the invention aims to solve When images are repeatedly and continuously formed on a selenium-based photoreceptor using this method, the red area to which yellow and magenta toner has adhered will be covered with cyan toner even though it has not been exposed. was found to adhere during development, and the color purity of red gradually decreased.

この色純度低下の原因を調べると以下の事実が分かった
。この問題の発生原因を第3図を用い説明する。第3図
は、感光体17上のマゼンタトナ−のみが付着した部分
(M部)と、イエロとマゼンタが重なって付着した赤部
分(R部)とを、トナー層の上からコロナ帯電したとき
の感光体26の帯電電位を示したものである。この図に
示すように、同じ条件で感光体をコロナ帯電したにも関
わらず、裸の感光体は800V、M部は850■、R部
は500vとなり異なった帯電電位になることが分かっ
た。この感光体を、そのまま800vの現像バイアスを
印加したシアン現像器で現像すると、帯電電位が低下し
たR部は露光していないにもかかわらずシアントナーが
付着し、赤の色純度が低下することが分かった。
When we investigated the cause of this decrease in color purity, we found the following facts. The cause of this problem will be explained using FIG. 3. FIG. 3 shows a portion of the photoreceptor 17 to which only magenta toner has adhered (M portion) and a red portion (R portion) to which yellow and magenta have overlapped, when corona charging is applied from above the toner layer. It shows the charged potential of the photoreceptor 26. As shown in this figure, although the photoreceptors were corona charged under the same conditions, the charged potentials of the bare photoreceptor were 800V, the M part was 850V, and the R part was 500V, which resulted in different charging potentials. If this photoreceptor is developed as it is with a cyan developer to which a developing bias of 800V is applied, cyan toner will adhere to the R area where the charging potential has decreased even though it has not been exposed, resulting in a decrease in the color purity of red. I understand.

本発明はかかる点に鑑み、感光体上でトナー像を重ね合
わせカラー像を得る際に、イエロとマゼンタのトナーが
重なった部分の感光体表面の帯電能を向上させ、不要な
シアントナーが付着することを防止し、色純度の高い赤
を得るカラー電子写真方法を提供することを目的とする
In view of this, the present invention improves the charging ability of the surface of the photoconductor where yellow and magenta toner overlap when toner images are superimposed on the photoconductor to obtain a color image, thereby preventing unnecessary cyan toner from adhering to the photoconductor surface. It is an object of the present invention to provide a color electrophotographic method that prevents this from occurring and obtains red with high color purity.

問題点を解決するための手段 本発明は、イエロ、マゼンタ、シアンの各色の像形成工
程ごとに、帯電・露光・現像工程を繰り返し、感光体上
にカラー像を形成した後、紙に転写する際に、マゼンタ
の現像工程後、かつシアンの帯電工程前に感光体に交流
コロナを爆露する工程を有するカラー電子写真方法であ
る。
Means for Solving the Problems In the present invention, charging, exposure, and development steps are repeated for each color image formation process of yellow, magenta, and cyan to form a color image on a photoreceptor and then transferred to paper. In particular, this is a color electrophotographic method that includes a step of exposing the photoreceptor to AC corona after the magenta developing step and before the cyan charging step.

作用 このイエロとマゼンタのトナーが重なって付着した感光
体R部の帯電電位が低下する理由は、感光体の静電的な
履歴現象が影響していることがわかった。  この従来
例で光源として用いた発光ダイオードアレイや半導体レ
ーザような赤外域の長波長光をセレン系感光体に照射し
続けると、静電疲労が著しくなることはよく知られたこ
とである。
Effect: It has been found that the reason why the charging potential of the R portion of the photoreceptor to which the yellow and magenta toners overlap and adhere is lowered is due to the electrostatic history phenomenon of the photoreceptor. It is well known that if a selenium-based photoreceptor is continuously irradiated with long-wavelength light in the infrared region such as the light emitting diode array or semiconductor laser used as a light source in this conventional example, electrostatic fatigue becomes significant.

これは、帯電・露光のサイクルを長時閏繰り返したとき
に、セレン感光体中にしだいにマイナスの電荷が蓄積さ
れ、このマイナスの電荷がコロナ帯電されたプラスの電
荷を打ち消しあって、感光体の帯電電位を低下させると
考えられる。しかし、この静電疲労現象は、一般の白黒
電子写真装置に用いたときには画像にはそれほど顕著に
は現れなかった。ところが、このカラー電子写真方式の
ように感光体上に帯電したプラスドナーが多く付着して
いると、感光体により強い電界がかかり、その結果赤部
分の感光体中にマイナスの電荷がたまりやすくなると考
えられる。この感光体中に蓄積されたマイナスの空閏電
荷を消すのに、感光体を交流コロナ爆露することが非常
に効果があることが分かった。
This is because when the cycle of charging and exposure is repeated for a long time, negative charges gradually accumulate in the selenium photoconductor, and these negative charges cancel out the positive charges that have been charged with corona, causing the photoconductor to It is thought that this reduces the charging potential of However, this electrostatic fatigue phenomenon did not appear so conspicuously in images when used in a general black-and-white electrophotographic device. However, when many charged positive donors are attached to the photoreceptor as in this color electrophotographic method, a stronger electric field is applied to the photoreceptor, and as a result, negative charges tend to accumulate in the photoreceptor in the red area. Conceivable. It has been found that exposing the photoreceptor to alternating current corona is very effective in erasing the negative charge accumulated in the photoreceptor.

実施例 本発明では、少なくともマゼンタの現像工程後でかつシ
アンの帯電工程前に感光体を交流コロナに爆露すること
が効果があるが、この交流コロナは、イエロ・マゼンタ
・シアンの全ての像形成工程中爆露し続けても同様の効
果がある。このコロナ爆露の効果は感光体が無定型セレ
ン系感光体である場合に特に有効であった。また感光体
が無定型セレンヒ素系感光体である場合にも効果的であ
った。
EXAMPLE In the present invention, it is effective to expose the photoreceptor to AC corona at least after the magenta developing process and before the cyan charging process. A similar effect can be obtained even if the exposure continues during the forming process. This corona exposure effect was particularly effective when the photoreceptor was an amorphous selenium-based photoreceptor. It was also effective when the photoreceptor was an amorphous selenium arsenic photoreceptor.

以下、本発明の具体的な実施例について第1図を用いて
更に詳細に説明する。
Hereinafter, specific embodiments of the present invention will be described in more detail with reference to FIG.

現像器26.27.28は直流電界でトナーを飛しょう
させる非接触型の非磁性l成分現像器で、現像ローラと
接触した導電性のファーブラシ29.30.31でトナ
ーを摩擦帯電し、アルミニウム製の現像ローラ32.3
3.34上に、ブレード35.36.37によりトナー
の薄層を形成する構成になっ・ている。現像器26には
イエロ(Y)、現像器27にはマゼンタ(M)、現像器
28にはシアン(C)の絶縁性トナーが入っている。現
像器38は、電子写真装置に広く用いられている絶縁性
トナーと磁性キャリアよりなる2成分現像剤の入った接
触型現像器である。そして現像ローラ32.33.34
.39と感光体40との間隙(現像ギャップ)を一定に
して、各現像器を感光体40の周辺に対向設置した。各
現像器は現像時には感光体に近接し、非現像時には離間
する離接機構が取り付けられている。
The developing devices 26, 27, and 28 are non-contact type non-magnetic l-component developing devices that use a DC electric field to scatter the toner, and the toner is charged by friction with a conductive fur brush 29, 30, 31 that is in contact with the developing roller. Aluminum developing roller 32.3
3.34, a thin layer of toner is formed by blades 35, 36, 37. The developing device 26 contains yellow (Y) insulating toner, the developing device 27 contains magenta (M), and the developing device 28 contains cyan (C) insulating toner. The developing device 38 is a contact type developing device containing a two-component developer consisting of an insulating toner and a magnetic carrier, which is widely used in electrophotographic devices. And developing roller 32, 33, 34
.. The developing units were placed opposite each other around the photoreceptor 40 with a constant gap (developing gap) between the photoreceptor 39 and the photoreceptor 40. Each developing device is attached with a separation mechanism that brings it close to the photoreceptor during development and separates it when not developing.

黒の現像器38の仕様及び現像条件並びにトナーの物性
を以下に示す。
The specifications and development conditions of the black developer 38 and the physical properties of the toner are shown below.

・現像器の仕様及び現像条件 現像ローラ39の直径:22mm 現像ローラ39の周速:320mm/s現像ローラ39
の上の現像剤層厚:400μm現像ローラ39の回転方
向:感光体40と逆方向(同進行方向) 現像ギャップ(現像ローラ表面と、感光体表面間のギャ
ップ):現像時300μ組 非現像時2IlII+ [現像剤物性] 現像剤の種類 :トナーとキャリアの2成分、  現像
剤 キャリアの平均粒径:約50μm キャリアの種類:テフロンコートフェライトトナー電荷
fi:+10μC/g トナー平均粒径 :8μm トナー比誘電率:約2 イエロ・マゼンタ・シアンの現像器の仕様及び現像条件
並びにトナーの物性を以下に示す。
・Developer specifications and developing conditions Diameter of developing roller 39: 22 mm Peripheral speed of developing roller 39: 320 mm/s developing roller 39
Thickness of the developer layer on the surface: 400 μm Direction of rotation of the developing roller 39: Opposite direction to the photoreceptor 40 (same traveling direction) Development gap (gap between the surface of the developing roller and the surface of the photoreceptor): 300 μm during development, set during non-development 2IlII+ [Developer physical properties] Type of developer: Two components: toner and carrier, Average particle size of developer carrier: Approximately 50 μm Type of carrier: Teflon coated ferrite Toner charge fi: +10 μC/g Average particle size of toner: 8 μm Toner ratio Dielectric constant: Approximately 2 The specifications and development conditions of the yellow, magenta, and cyan developers and the physical properties of the toners are shown below.

・現像器の仕様及び現像条件 現像ローラの直径:20nIIl 現像ローラの周速:  160層m/ s現像ローラの
回転方向:感光体40と逆方向(同進行方向) 現像ローラの上のトナー層厚=30μm現像ギャップ(
現像ローラ表面と、感光体表面間のギャップ):現像時
150μm、非現像時2− [トナーの物性] トナー電荷量 :+3μC/g 平均粒径 −:10μm 比誘電率   :約2 感光体として赤外領域に長波長増感した直径152at
sの無定型5e−Te感光体ドラム40(感光層の厚み
60μm、比誘電率的7、赤外域に長波長増感した機能
分離型セレン感光体)を用い、周速160mm/sで回
転させた。この感光体40を帯電器41(スコロトロン
帯電器、コロナ電圧:+7に■、グリッド電圧:1kV
)により帯電電位+900vに帯電させた。次に、波長
790止の半導体レーザ42を発光させ露光した。この
とき、感光体面上での光強度は、1.0mWであった。
・Developer specifications and development conditions Developing roller diameter: 20nIIl Developing roller circumferential speed: 160 layers m/s Developing roller rotation direction: Opposite direction to photoreceptor 40 (same traveling direction) Toner layer thickness on developing roller =30μm development gap (
Gap between developing roller surface and photoreceptor surface): 150 μm during development, 2- when not developing [Toner physical properties] Toner charge amount: +3 μC/g Average particle size -: 10 μm Relative dielectric constant: Approx. 2 Red as a photoreceptor Diameter 152at with long wavelength sensitization in the outer region
s amorphous 5e-Te photoreceptor drum 40 (photoreceptor layer thickness 60 μm, dielectric constant 7, functionally separated selenium photoreceptor sensitized to long wavelengths in the infrared region) and rotated at a circumferential speed of 160 mm/s. Ta. This photoreceptor 40 is connected to a charger 41 (scorotron charger, corona voltage: +7, grid voltage: 1kV)
) to a charging potential of +900V. Next, the semiconductor laser 42 having a wavelength of 790 nm was caused to emit light for exposure. At this time, the light intensity on the photoreceptor surface was 1.0 mW.

この半導体レーザ42を用いて、感光体40上にネガの
黒信号を露光し、静電潜像を形成した。前記潜像を現像
ローラ39に+600vを印加した現像状態の黒の現像
器38で反転現像し黒のトナー像を形成した後、除電ラ
ンプ43で感光体40を除電した。このとき感光体40
上に現像された黒のトナー層厚は1層から2層であり、
トナー層の厚みは、10〜20μmであった。
Using this semiconductor laser 42, a negative black signal was exposed onto the photoreceptor 40 to form an electrostatic latent image. The latent image was reversely developed by a black developing device 38 in a developing state in which +600V was applied to the developing roller 39 to form a black toner image, and then the photoreceptor 40 was neutralized by a neutralizing lamp 43 . At this time, the photoreceptor 40
The thickness of the black toner layer developed on top is 1 to 2 layers,
The thickness of the toner layer was 10 to 20 μm.

次に、再びコロナ帯電器41(スコロトロン帯電器、コ
ロナ電圧: +7kV、グリッド電圧:600v)で感
光体40を+600vに帯電した。
Next, the photoreceptor 40 was charged to +600 V again using the corona charger 41 (Scorotron charger, corona voltage: +7 kV, grid voltage: 600 V).

このとき、黒トナーの付着した感光体40の帯電電位は
600vになった。そののち、感光体40に半導体レー
ザ42によりイエロに対応する信号光を露光しイエロの
静電潜像を形成した。ここでは、半導体レーザの露光量
を感光体面上で1.5mWにした。次に、この感光体を
現像ローラ32に+600vを印加し、た現像状態のイ
エロの現像器26および非現像状態のマゼンタ現像器2
7、シアン現像器28および黒現像器38に通過させて
イエロのトナー像を形成した。次に今度はこの感光体4
0を除電すること無く、そのまま再びコロナ帯電器41
(スコロトロン帯電器、コロナ電圧:+7kV、 グリ
ッド電圧:800V)によって感光体40を+810V
に帯電した。このとき、黒及びイエロトナーが付着した
感光体40の帯電電位は810Vになった。その後、半
導体レーザ42によりマゼンタに対応する信号光を露光
しマゼンタの静電潜像を形成した。次に、感光体40を
非現像状態のイエロ現像器26、現像ローラ33に+8
00■を印加した現像状態のマゼンタ現像器27に通過
させてマゼンタのトナー像を形成した。このとき感光体
40上のイエロとマゼンタの重なった部分のトナー層は
、2層から4層であり、その厚みは20〜40μmであ
った。その後、感光体40を非現像状態のシアン現像器
28及び黒、現像器38に通過させた。次に、今度は感
光体40を交流コロナ帯電器44(印加電圧; 5kV
rms)で爆露し、再びコロナ帯電器41によって感光
体40を+800vに帯電した。このとき、黒、イエロ
、およびマゼンタントナーのみが付着した感光体40の
帯電電位は800vになった。またイエロとマゼンタの
トナーが重なった部分の感光体40の帯電電位も800
vになった。その後、半導体レーザ42によりシアンに
対応する信号光を露光しシアンの静電潜像を形成した。
At this time, the charged potential of the photoreceptor 40 to which the black toner was attached was 600V. Thereafter, the photoreceptor 40 was exposed to signal light corresponding to yellow by the semiconductor laser 42 to form a yellow electrostatic latent image. Here, the exposure amount of the semiconductor laser was set to 1.5 mW on the photoreceptor surface. Next, +600V is applied to this photoreceptor to the developing roller 32, and the yellow developer 26 is in a developing state and the magenta developer 2 is in a non-developing state.
7. The toner was passed through a cyan developer 28 and a black developer 38 to form a yellow toner image. Next, this photoreceptor 4
The corona charger 41 is turned on again without removing the charge from 0.
(Scorotron charger, corona voltage: +7 kV, grid voltage: 800 V)
It was charged with electricity. At this time, the charged potential of the photoreceptor 40 to which the black and yellow toners were attached was 810V. Thereafter, a semiconductor laser 42 was used to expose signal light corresponding to magenta to form a magenta electrostatic latent image. Next, the photoreceptor 40 is transferred to the yellow developing device 26 in a non-developing state and the developing roller 33 at +8
A magenta toner image was formed by passing through a magenta developing device 27 in a developing state to which 00■ was applied. At this time, the toner layer in the overlapping portion of yellow and magenta on the photoreceptor 40 had two to four layers, and the thickness was 20 to 40 μm. Thereafter, the photoreceptor 40 was passed through a cyan developer 28 and a black developer 38 in a non-developing state. Next, the photoreceptor 40 is charged with an AC corona charger 44 (applied voltage: 5 kV).
rms), and the photoreceptor 40 was charged again to +800V by the corona charger 41. At this time, the charged potential of the photoreceptor 40 to which only black, yellow, and magentan toners were attached was 800V. In addition, the charged potential of the photoreceptor 40 in the area where the yellow and magenta toners overlap is 800.
It became v. Thereafter, the semiconductor laser 42 was used to expose signal light corresponding to cyan to form a cyan electrostatic latent image.

次に、感光体40を非現像状態のイエロ現像器26及び
マゼンタの現像器27、現像ローラ34に+800■を
印加した現像状態のシアン現像器28に通過させてシア
ンのトナー像を形成し感光体上にカラー画像を完成した
Next, the photoreceptor 40 is passed through a yellow developing device 26 in a non-developing state, a magenta developing device 27, and a cyan developing device 28 in a developing state, in which +800■ is applied to the developing roller 34, to form a cyan toner image and then exposed to light. A color image was completed on the body.

こうして感光体40上に得られたカラートナー像を転写
帯電器45によって紙46に転写した後、定着器47に
より熱定着した。一方、転写後、感光体40の表面を、
クリーニング前帯電器48(コロナ電圧+5.5kV)
でプラスに帯電した後、−150Vの電圧を印加した導
電性ファーブラシ49を感光体40に圧接しクリーニン
グした。
The color toner image thus obtained on the photoreceptor 40 was transferred onto paper 46 by a transfer charger 45, and then thermally fixed by a fixing device 47. On the other hand, after the transfer, the surface of the photoreceptor 40 is
Pre-cleaning charger 48 (corona voltage +5.5kV)
After being positively charged, a conductive fur brush 49 to which a voltage of -150 V was applied was brought into pressure contact with the photoreceptor 40 for cleaning.

その結果、赤、緑、青のベタ部の合成色の色濃度が1.
 5以上で、しかも赤部にシアントナーが混入すること
なく色純度の高い鮮明なカラー画像が得られた。この像
形成工程を100枚連続して繰り返したが、赤部分への
シアンかぶりは発生しなかった。
As a result, the color density of the composite color of the red, green, and blue solid areas is 1.
5 or higher, and a clear color image with high color purity was obtained without cyan toner being mixed into the red area. This image forming process was repeated for 100 sheets in succession, but no cyan fogging occurred in the red portion.

発明の詳細 な説明したように、本発明によれば、感光体上でトナー
像を重ね合わせカラー像を得る際に、イエロとマゼンタ
のトナーが重なった部分の感光体の表面の帯電能を向上
させ、不要なシアントナーが付着することを防止し、色
純度の高い赤色を得ることができ、その実用的効果は大
きい。
DETAILED DESCRIPTION OF THE INVENTION As described in detail, according to the present invention, when toner images are superimposed on a photoreceptor to obtain a color image, the charging ability of the surface of the photoreceptor in the area where yellow and magenta toners overlap is improved. It is possible to prevent unnecessary cyan toner from adhering, and to obtain a red color with high color purity, which has great practical effects.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例におけるカラー電子は赤部分
にシアントナーが現像される原因を示した説明図である
。 26.27.28・・・現像器、 38・・・現像器(黒)、40・・・感光体、41・・
・コロナ帯電器、42・・・半導体レーザ、44・・・
交流コロナ帯電器。 代理人の氏名 弁理士 中尾敏男 ばか1名第 21!
l11
FIG. 1 is an explanatory diagram showing the reason why cyan toner is developed in the red part of the color electrons in one embodiment of the present invention. 26.27.28...Developer, 38...Developer (black), 40...Photoreceptor, 41...
・Corona charger, 42... semiconductor laser, 44...
AC corona charger. Name of agent: Patent attorney Toshio Nakao Idiot No. 21!
l11

Claims (3)

【特許請求の範囲】[Claims] (1)イエロ、マゼンタ、シアンの各色の像形成工程ご
とに、帯電・露光・現像工程を繰り返し、感光体上にカ
ラー像を形成した後、紙に転写する際に、マゼンタの現
像工程後、かつシアンの帯電工程前に感光体に交流コロ
ナを爆露する工程を有するカラー電子写真方法。
(1) After repeating the charging, exposing, and developing steps for each color image formation process of yellow, magenta, and cyan to form a color image on the photoreceptor, when transferring it to paper, after the magenta development process, and a color electrophotographic method comprising the step of exposing the photoreceptor to alternating current corona before the cyan charging step.
(2)感光体が無定型セレン系感光体である特許請求の
範囲第1項記載のカラー電子写真方法。
(2) The color electrophotographic method according to claim 1, wherein the photoreceptor is an amorphous selenium-based photoreceptor.
(3)感光体が無定型セレンヒ素系感光体である特許請
求の範囲第1項記載のカラー電子写真方法。
(3) The color electrophotographic method according to claim 1, wherein the photoreceptor is an amorphous selenium arsenic photoreceptor.
JP62270664A 1987-10-27 1987-10-27 Color electrophotographic method and apparatus Expired - Fee Related JP2825809B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP62270664A JP2825809B2 (en) 1987-10-27 1987-10-27 Color electrophotographic method and apparatus
US07/261,072 US4949125A (en) 1987-10-27 1988-10-21 Method and apparatus for color electrophotography
CA000581267A CA1315611C (en) 1987-10-27 1988-10-26 Method and apparatus for color electrophotography
KR8813967A KR920009158B1 (en) 1987-10-27 1988-10-26 Color electronic photography method and apparatus
EP88310063A EP0314457B1 (en) 1987-10-27 1988-10-26 Method and apparatus for color electrophotography
DE3850631T DE3850631T2 (en) 1987-10-27 1988-10-26 Method and device for color electrophotography.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62270664A JP2825809B2 (en) 1987-10-27 1987-10-27 Color electrophotographic method and apparatus

Publications (2)

Publication Number Publication Date
JPH01113771A true JPH01113771A (en) 1989-05-02
JP2825809B2 JP2825809B2 (en) 1998-11-18

Family

ID=17489233

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62270664A Expired - Fee Related JP2825809B2 (en) 1987-10-27 1987-10-27 Color electrophotographic method and apparatus

Country Status (1)

Country Link
JP (1) JP2825809B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5867760A (en) * 1996-08-29 1999-02-02 Sharp Kabushiki Kaisha Transfer device with an anisotropin conductive layer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6046575A (en) * 1983-08-24 1985-03-13 Fujitsu Ltd Bicolor electronic recording device
JPS62115172A (en) * 1985-11-14 1987-05-26 Matsushita Electric Ind Co Ltd Color electrophotographic method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6046575A (en) * 1983-08-24 1985-03-13 Fujitsu Ltd Bicolor electronic recording device
JPS62115172A (en) * 1985-11-14 1987-05-26 Matsushita Electric Ind Co Ltd Color electrophotographic method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5867760A (en) * 1996-08-29 1999-02-02 Sharp Kabushiki Kaisha Transfer device with an anisotropin conductive layer

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