JPS61203474A - Color image forming device - Google Patents
Color image forming deviceInfo
- Publication number
- JPS61203474A JPS61203474A JP60042801A JP4280185A JPS61203474A JP S61203474 A JPS61203474 A JP S61203474A JP 60042801 A JP60042801 A JP 60042801A JP 4280185 A JP4280185 A JP 4280185A JP S61203474 A JPS61203474 A JP S61203474A
- Authority
- JP
- Japan
- Prior art keywords
- developing
- color
- latent image
- development
- electrostatic latent
- 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
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
- G03G15/0105—Details of unit
- G03G15/0121—Details of unit for developing
Abstract
Description
【発明の詳細な説明】
■
本発明はカラー電子写真複写装置、コンピュータ出力部
のカラー記録装置のようなカラー画像形成装置に関し、
特に複写又は印刷工程前に各現像ユニットに現像すべき
静電潜像の領域を指定することができるカラー画像形成
装置に関する。以下の説明においては、複写装置に関連
して説明するが本発明はこれに限定されるものではない
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color image forming apparatus such as a color electrophotographic copying apparatus, a color recording apparatus of a computer output section,
In particular, the present invention relates to a color image forming apparatus capable of specifying an area of an electrostatic latent image to be developed in each developing unit before a copying or printing process. Although the following description will be made in connection with a copying apparatus, the present invention is not limited thereto.
Ｌえ立且遣
周知のように、カラー複写には２色或はそれ以上の単色
カラー画像の複写を行なう所謂マルチカラ一方式と、原
稿の金色カラーに対応するカラー画像の複写を行なうフ
ルカラ一方式とがある。マルチカラ一方式のカラー複写
装置は２つの現像ユニットを使用して２色の単色カラー
画像の複写を行なうものが多い。As is well known, there are two types of color copying: the so-called multi-color method, which copies two or more monochromatic color images, and the full-color method, which copies a color image corresponding to the golden color of the original. There is. Many multi-color one-type color copying apparatuses use two developing units to copy two monochromatic color images.
マルチカラ一方式のカラー複写装置は大別すると２つの
タイプがあり、１つは１回の原稿走査で各色に対する静
電潜像を同時に潜像担持体、即ちこの場合感光体上に形
成し、この感光体に沿って配置された所定数の現像ユニ
ットによりこの静電潜像の所定部分を順次に現像してマ
ルチカラーの可視粉像を１回で形成し、転写、定着する
ものである。他の１つは１回に１つの現像ユニットによ
り１つの色の可視粉像を感光体に形成し、このようにし
て形成した各色の可視粉像を同一の転写材に順次に転写
し、マルチカラーの可視粉像を複写すべき色の数だけ露
光−現像−転写工程を繰返して転写材上に形成し、定着
するものである。There are two types of multi-color one-sided color copying devices; one type is one in which an electrostatic latent image for each color is simultaneously formed on a latent image carrier, in this case a photoreceptor, in one document scan; A predetermined number of developing units arranged along the photoreceptor sequentially develop predetermined portions of this electrostatic latent image to form a multi-color visible powder image at one time, which is then transferred and fixed. The other method is to form a visible powder image of one color on a photoreceptor using one developing unit at a time, and sequentially transfer the visible powder images of each color formed in this way to the same transfer material. A color visible powder image is formed on a transfer material by repeating an exposure-development-transfer process as many times as the number of colors to be copied, and then fixed.
が し − 。It is -.
しかしながら、１回の原稿走査で各色に対する静電潜像
を同時に感光体上に形成する方式は複写すべき各色に明
確に対応した静電潜像を感光体上に形成することが難し
く、又各色の現像ユニットで同時に現像する際に現像剤
が飛散したり、不所望な色の現像剤が感光体に付着する
といったことなどにより許容し得ない混色が生じる欠点
があり、実用化されていないのが実状である。However, with the method of simultaneously forming electrostatic latent images for each color on the photoreceptor in one scan of the document, it is difficult to form an electrostatic latent image on the photoreceptor that clearly corresponds to each color to be copied. This method has not been put into practical use due to the drawbacks that unacceptable color mixture occurs due to developer scattering and undesired color developer adhering to the photoconductor when developing simultaneously in two development units. is the actual situation.
又、各色ごとに露光−現像−転写工程を行なう方式では
複写すべき色の数が多くなるにつれ多くの時間が必要と
なり、非常に効率が悪い、又、同一の転写材を繰返し使
用しなければならないが、各回の工程ごとに転写材の先
端位置決めを正確に行なうことが難しく、従って画像ズ
レが生じる欠点があり、更には転写材が変形したり、湾
曲したりする欠点があった。In addition, the method of performing the exposure-development-transfer process for each color requires more time as the number of colors to be copied increases, and is extremely inefficient, and the same transfer material must be used repeatedly. However, it is difficult to accurately position the leading edge of the transfer material in each step, resulting in image shift, and furthermore, the transfer material may be deformed or curved.
ｌ見立１１
従って本発明の目的は、１回の原稿走査によって各色に
対する静電潜像を感光体つまり潜像担持体上に形成し、
各現像ユニットによって順次に現像して混色のない鮮明
な多色の可視粉像を１回の工程により形成することがで
きるカラー画像形成装置を提供することである。l Mitate 11 Therefore, an object of the present invention is to form an electrostatic latent image for each color on a photoreceptor, that is, a latent image carrier, by scanning a document once,
It is an object of the present invention to provide a color image forming apparatus capable of forming a clear multicolor visible powder image without color mixture in a single process by sequentially developing with each developing unit.
本発明の他の目的は、複写又は工程前に原稿を原稿蔵置
台上に置き、原稿のカラー画像領域で複写すべき部分を
対応するカラー現像ユニットに指定し、感光体上に形成
された静電潜像の指定領域を対応するカラー現像ユニッ
トにより現像し、混色のない鮮明なカラー画像を１回の
原稿走査及び転写によって得られるようにしたカラー画
像形成装置を提供することである。Another object of the present invention is to place a document on a document storage table before copying or processing, designate a color image area of the document to be copied to a corresponding color developing unit, and remove the static image formed on a photoreceptor. To provide a color image forming apparatus which develops a designated area of an electrostatic latent image by a corresponding color developing unit and obtains a clear color image without color mixture by scanning and transferring a document once.
− ため
上記目的は、本発明によるカラー画像形成装置によって
完全に達成される０本発明を要約すると、本発明はそれ
ぞれが異なる色の現像剤を有する複数の現像ユニットを
潜像担持体に沿って配置し、潜像担持体表面に形成され
た静電潜像を現像し、転写して所望のカラー画像を得る
カラー画像形成装置において、複写又は印刷工程前に各
現像ユニットに対して現像すべき静電潜像の領域を指定
し、各現像ユニットを該指定領域において順次に現像動
作させ、１回の原稿走査で多色の可視粉像を形成できる
ようにしたことを特徴とするカラー画像形成装置である
。- Therefore, the above objects are completely achieved by a color image forming apparatus according to the present invention.To summarize the present invention, the present invention provides a plurality of developing units each having a different color of developer along a latent image carrier. In a color image forming apparatus that develops and transfers an electrostatic latent image formed on the surface of a latent image carrier to obtain a desired color image, each developing unit must be developed before the copying or printing process. Color image formation characterized by specifying an area of an electrostatic latent image and sequentially developing each developing unit in the specified area, so that a multicolor visible powder image can be formed in one scan of an original document. It is a device.
本発明によるカラー画像形成装置はカラー電子写真複写
装置、コンピュータ出力部のカラー配備装置等として使
用できるものであるが、以下の説明では黒色及び赤色の
２色のカラー画像を形成するカラー電子写真複写装置に
本発明を適用した場合について説明する。又、この種の
カラー電子写真複写装置は、種々の静電潜像形成プロセ
ス、例えば１次帯電−２次帯電／色分解露光−全面露光
の新工程を含む、所謂ＮＰプロセス、または１次帯電−
色分解露光の新工程を含む、所謂カールソンプロセス、
または他のプロセスを利用し得るが、本実施例ではカー
ルソンプロセスを応用した電子写真複写装置について説
明する。The color image forming apparatus according to the present invention can be used as a color electrophotographic copying apparatus, a color distribution apparatus for a computer output section, etc., but in the following description, it is a color electrophotographic copying apparatus that forms two color images of black and red. A case where the present invention is applied to a device will be explained. In addition, this type of color electrophotographic copying apparatus uses various electrostatic latent image forming processes, such as the so-called NP process, which includes a new process of primary charging - secondary charging / color separation exposure - full exposure, or primary charging. −
The so-called Carlson process, which includes a new process of color separation exposure,
Alternatively, other processes may be used, but in this embodiment, an electrophotographic copying apparatus to which the Carlson process is applied will be described.
第１図は本発明を適用したカラー電子写真複写装置の一
実施例を示す、感光ドラムｌは直径１２０ｍｍであり、
その周面に電子写真用感光層が形成されており１周知の
態様で図示矢印方向に２００ｍｍ／秒の速度で回転して
いる。FIG. 1 shows an embodiment of a color electrophotographic copying apparatus to which the present invention is applied, in which a photosensitive drum l has a diameter of 120 mm,
An electrophotographic photosensitive layer is formed on its peripheral surface, and it rotates at a speed of 200 mm/sec in the direction of the arrow in the figure in a well-known manner.
感光ドラム１の周面に沿って、感光層を一様に帯電する
帯電器２、原稿に応じた光像３を露光する露光部、赤ト
ナー現像ユニット４＋、黒トナー現像ユニツ）４ｚが感
光ドラムｌの回転方向に順次に配置されている。帯電器
２により一様に帯電された感光ドラム１は露光部におい
て原稿に応じた光源３を受けて静電潜像を形成する。Along the circumferential surface of the photosensitive drum 1, a charger 2 that uniformly charges the photosensitive layer, an exposure section that exposes a light image 3 according to the document, a red toner development unit 4+, and a black toner development unit 4z are the photosensitive drums. They are arranged sequentially in the rotational direction of l. The photosensitive drum 1, which has been uniformly charged by the charger 2, receives a light source 3 corresponding to the original at an exposure section to form an electrostatic latent image.
赤トナー現像ユニット４，１にはマグネタイトを含有し
ていない非磁性の赤トナーが収容されており、直径２０
ｍｍの現像スリーブ５Ｉに現像バイアス電圧（１（ＬＯ
ＯＶｐ−ｐ、１２００ＨｚのＡｃ＋ｔｏｏｖのＤＣ電圧
を重畳したもの）が印加されたときに静電潜像を赤トナ
ーで現像する。同、様に、黒トナー現像ユニツ）４ｚに
はマグネタイトを含有した磁性の黒トナーが収容されて
おり、直径２０ｍｍの現像スリーブ５２に現像バイアス
（１５００Ｖｐ−ｐ、１４００ＨｚのＡＣ電圧＋ｔｏｏ
ｖのＤＣ電圧を重畳したもの）が印加されたときに静電
潜像を黒トナーで現像する。現像された感光ドラム１上
のカラー可視粉像は給紙装置（図示せず）から転写ガイ
ド６を通じて送られてくる転写紙７に転写用帯電器８に
よって転写される。The red toner developing units 4 and 1 contain non-magnetic red toner that does not contain magnetite, and have a diameter of 20 mm.
A developing bias voltage (1 (LO
The electrostatic latent image is developed with red toner when OVp-p (superimposed DC voltage of 1200 Hz Ac+toov) is applied. Similarly, the black toner developing unit 4z contains magnetic black toner containing magnetite, and a developing sleeve 52 with a diameter of 20 mm is supplied with a developing bias (1500 Vp-p, 1400 Hz AC voltage + too much).
The electrostatic latent image is developed with black toner when a superimposed DC voltage of V) is applied. The developed color visible powder image on the photosensitive drum 1 is transferred by a transfer charger 8 onto a transfer paper 7 that is fed through a transfer guide 6 from a paper feeder (not shown).
転写紙７は分離用ローラ９によって感光ドラム１から分
離され、図示しない定着装置に送られる。感光ドラムｌ
上に転写されずに残ったトナーはクリーニング装２１１
０によってクリーニングされ、感光ドラムｌの表面は清
浄にされ、イレーサー光１８によって除電された後火の
サイクルに入る。The transfer paper 7 is separated from the photosensitive drum 1 by a separation roller 9 and sent to a fixing device (not shown). photosensitive drum l
The toner remaining on the surface without being transferred is removed from the cleaning device 211.
0, the surface of the photosensitive drum l is cleaned, and after being neutralized by the eraser light 18, it enters the firing cycle.
上記したように各現像ユニツ）４＋及び４Ｚの現像スリ
ーブ５Ｉ及び５ＺにはＡＣ電圧とＤＣ電圧を重畳した現
像バイアスが印加されるが、このバイアス電圧はＤＣ分
がＤＣコントローラ１６によって供給され、又ＡＣ分は
高圧トランス１７１び１７２によってそれぞれ供給され
る。又、現像バイアス電圧の印加時間は領域指定回路１
５によって決定され、この領域指定回路１５によってＤ
Ｃコントローラ１６及び高圧トランス１７１．１７２が
所定のタイミングで所定時間付勢され各４１．４１の現
像スリーブ５．．５ｚに指定された静電潜像の領域を現
像するタイミングと時間で現像バイアス電圧が印加され
る。従って非現像時にはその現像ユニットには上記現像
バイアス電圧は印加されず、現像を生じさせない現像バ
イアスが印加され、従って不所望なトナーの飛散や感光
ドラムへの付着等が確実に防止でき、混色のない鮮明な
カラー画像が得られる。As described above, a developing bias in which AC voltage and DC voltage are superimposed is applied to the developing sleeves 5I and 5Z of each developing unit 4+ and 4Z, but the DC component of this bias voltage is supplied by the DC controller 16, and The AC portion is supplied by high voltage transformers 171 and 172, respectively. Also, the application time of the developing bias voltage is determined by the area specifying circuit 1.
5, and this area designation circuit 15 determines D.
The C controller 16 and the high voltage transformers 171 and 172 are energized at a predetermined timing and for a predetermined time, and the developing sleeves 5. ．． A developing bias voltage is applied at the timing and time to develop the area of the electrostatic latent image designated as 5z. Therefore, during non-development, the development bias voltage is not applied to the development unit, and a development bias that does not cause development is applied, thereby reliably preventing undesired toner scattering and adhesion to the photosensitive drum, and preventing color mixture. You will get a clear color image.
次に、各現像ユニットに現像すべき静電潜像の領域を指
定する態様について説明する。Next, a mode of specifying the area of the electrostatic latent image to be developed in each developing unit will be described.
第２図に示すようにＡ、Ｂ、 ・・・・Ｐの１６文字
が４字づつ４行に並んだ原稿１１を第３図に示すように
、第１行のＡＢＣＤと第３行のＩＪＫＬを赤色で、第２
行のＥＦＧＨと第４行のＭＮＯＰを黒色で複写したい場
合には、先ず複写動作前に第４図に示すように、原稿載
置台１２上に第２図の原稿ｌｌを複写する面を表に向け
て置く、原稿ａ置台１２の原稿付き当て面のところには
目盛１４が付けられており、操作パネル１３により赤ト
ナー現像ユニツ）４＋及び黒トナー現像ユニット４ｚで
現像する領域をそれぞれ指定する。即ち、赤色複写する
ＡＢＣＤＩＪＫＬについては、現像ユニット選択ボタン
１３Ｒ及び１３Ｂの中の赤トナー現像ユニットボタン１
３Ｒを押してから領域指定ボタン１３１によって現像す
べき領域をｏ−ｂ、ｄ−ｆと指定し、表示部１３ｚでこ
れを確認する。同様に、黒色複写する文字ＥＦＧＨＭＮ
ＯＰについては、黒トナー現像ユニットボタン１３Ｂを
押してから領域指定ボタン１３．によって現像すべき領
域ｂ−ｄ、ｆ−ｈと指定する。As shown in Fig. 2, the original 11 in which 16 characters A, B, ...P are arranged in 4 lines of 4 characters each is divided into ABCD in the first line and IJKL in the third line, as shown in Fig. 3. in red, the second
If you want to copy the row EFGH and the fourth row MNOP in black, first, as shown in FIG. 4, place the original ll in FIG. 2 on the document tray 12 with the side to be copied facing up. A scale 14 is attached to the original contacting surface of the original A placing stand 12, which is placed facing the original A, and the operation panel 13 is used to designate the areas to be developed by the red toner developing unit) 4+ and the black toner developing unit 4z, respectively. That is, for ABCDIJKL for red copying, the red toner developing unit button 1 of the developing unit selection buttons 13R and 13B is pressed.
After pressing 3R, the area to be developed is specified as ob and df using the area designation button 131, and this is confirmed on the display section 13z. Similarly, the characters EFGHMN are copied in black.
For OP, press the black toner development unit button 13B and then press the area designation button 13. The areas to be developed are designated as b-d and f-h.
現像ユニットに対する領域の指定が終ったら、原稿１１
を蔵置第１２上に伏せて起き（複写する面を下に向けて
起き）、複写動作に入る。これによって赤トナー現像ユ
ニット４１の現像スリーブ５１には原稿に対応した静電
潜像の０〜ｂとｄ〜ｆの領域のときにのみ上記した現像
バイアス電圧が印加され、ｂ−ｄとｆ−ｈの領域のとき
には現像バイアスがオフにされ、現像されない。After specifying the area for the developing unit, move the original 11
12 (stand up with the side to be copied facing down) and begin the copying operation. As a result, the above-mentioned developing bias voltage is applied to the developing sleeve 51 of the red toner developing unit 41 only in the areas 0 to b and d to f of the electrostatic latent image corresponding to the document, and the developing bias voltage is applied to the developing sleeve 51 of the red toner developing unit 41, and In the region h, the developing bias is turned off and no development is performed.
同様に、黒トナー現像ユニット４ｚの現像スリーブ５２
には原稿に対応した静電潜像のｂ−ｄとｆ−ｈの領域の
ときにのみ上記した現像バイアス電圧が印加され、０〜
ｂとｄ−ｆの領域のときには現像バイアスがオフにされ
、現像されない。Similarly, the developing sleeve 52 of the black toner developing unit 4z
The developing bias voltage described above is applied only in the areas b-d and f-h of the electrostatic latent image corresponding to the original, and
In the regions b and df, the developing bias is turned off and no development is performed.
かくして、１回の原稿走査と１回に転写で第３図に示す
ＡＢＣＤ及びＩＪＫＬが赤色でＥＦＧＨ及びＭＮＯＰが
黒色の２色の複写が選られる。In this way, two-color copying, in which ABCD and IJKL are red and EFGH and MNOP are black, as shown in FIG. 3, is selected by scanning the original once and transferring it once.
上記実施例では現像バイアス電圧を電圧をオン、オフさ
せて各現像ユニットに対して指定した領域を現像するよ
うに構成したが、現像時のみ各現像ユニットを感光ドラ
ムの感光面に近接させて指定領域を現像し、非現像時に
は感光面から離れた位置に移動させるようにしてもよい
、この際に、現像バイアス電圧を併用すれば更に効果が
ある。又、２つの現像ユニットに対してそれぞれ現像領
域を指定したが、一方の現像ユニットに対してのみ現像
領域を指定し、他方の現像ユニットに対しては特定の領
域を指定せずに残りの領域をすべて現像するという方式
を取ってもよい、又、多色現像装置として赤及び黒の２
色の現像ユニットを有するものを例示したが、２つの色
は種々に変更できるものである。勿論、３つ以上の現像
ユニットを有する多色現像装置の場合にも本発明が適用
できることはいうまでもない。In the above embodiment, the developing bias voltage is turned on and off to develop a designated area for each developing unit. However, only during development, each developing unit is brought close to the photosensitive surface of the photosensitive drum and designated. It is also possible to develop the area and move it to a position away from the photosensitive surface when not developing. In this case, it is more effective if a developing bias voltage is also used. Also, although the development area was specified for each of the two development units, the development area was specified only for one development unit, and the remaining area was specified for the other development unit without specifying a specific area. Alternatively, a multi-color developing device may be used in which two colors, red and black, are developed.
Although an example having developing units of different colors is illustrated, the two colors can be changed in various ways. Of course, it goes without saying that the present invention can also be applied to a multicolor developing device having three or more developing units.
及」ＬΩ１釆
このように、本発明においては、複写又は印刷工程前に
各現像ユニットに対して現像すべき静電潜像の領域を指
定し、各現像ユニットを正確なタイミングと時間で現像
動作させるものであるから、１回の原稿走査で各色に明
確に対応した静電潜像が感光体即ち潜像担持体上に形成
でき、しかも現像剤の飛散や不所望なトナーの潜像担持
体への付着もなく、従って混色のない鮮明な多色の画像
が１回の原稿走査と１回の転写で形成できる顕著な利点
がある。又、１回の原稿走査と１回の転写でよいから多
色複写又は印刷の速度が速くなり、更に転写材の先端位
置決めの必要がなく、且つ変形や湾曲もなく、非常に効
率良く短時間で多色のカラー複写又は印刷が行なえる利
点もある。As described above, in the present invention, the area of the electrostatic latent image to be developed is specified for each developing unit before the copying or printing process, and each developing unit performs the developing operation at accurate timing and time. Therefore, an electrostatic latent image that clearly corresponds to each color can be formed on the photoreceptor, that is, the latent image carrier, by one scan of the original, and it is possible to prevent developer from scattering or undesired toner from entering the latent image carrier. There is a remarkable advantage that a clear multicolor image without color mixture can be formed by one document scanning and one transfer. In addition, since only one document scan and one transfer are required, the speed of multicolor copying or printing is faster, and there is no need to position the tip of the transfer material, and there is no deformation or bending, making it very efficient and quick. It also has the advantage of being able to perform multicolor copying or printing.
第１図は本発明を適用したカラー電子写真複写装置の位
置実施例を示す概略構成図である。
第２図は複写すべき原稿の一例を示す平面図である。
第３図は２色のカラー複写例を示す平面図である。
第４図は第１図のカラー電子写真複写装置の原稿ａ置第
を示す平面図である。
４Ｉ ：赤トナー現像ユニット
４Ｚ：黒トナー現像ユニット
５Ｉ ：赤トナー現像スリーブ
５１：黒トナー現像スリーブ
１２：原稿蔵置台
１３：操作パネル
１５：領域指定回路
１６：ＤＣコントローラ
１７１．１７２：高圧トランスFIG. 1 is a schematic configuration diagram showing an embodiment of a color electrophotographic copying apparatus to which the present invention is applied. FIG. 2 is a plan view showing an example of a document to be copied. FIG. 3 is a plan view showing an example of two-color copying. FIG. 4 is a plan view showing document position a of the color electrophotographic copying apparatus shown in FIG. 4I: Red toner developing unit 4Z: Black toner developing unit 5I: Red toner developing sleeve 51: Black toner developing sleeve 12: Original storage table 13: Operation panel 15: Area specification circuit 16: DC controller 171.172: High voltage transformer
Claims (1)
ニットを潜像担持体に沿つて配置し、潜像担持体表面に
形成された静電潜像を現像し、転写して所望のカラー画
像を得るカラー画像形成装置において、複写又は工程前
に各現像ユニットに対して現像すべき静電潜像の領域を
指定し、各現像ユニットを該指定領域において順次に現
像動作させ、１回の原稿走査で多色の可視粉像を形成で
きるようにしたことを特徴とするカラー画像形成装置。 ２）各現像ユニットの現像動作が現像用バイアス電圧の
印加によつて行なわれる特許請求の範囲第１項記載のカ
ラー画像形成装置。 ３）各現像ユニットの現像動作が潜像担持体の表面に現
像スリーブを近接せしめることよつて行なわれる特許請
求の範囲第１項記載のカラー画像形成装置。[Claims] 1) A plurality of developing units each having a developer of a different color are arranged along the latent image carrier, and the electrostatic latent image formed on the surface of the latent image carrier is developed and transferred. In a color image forming apparatus that obtains a desired color image, a region of an electrostatic latent image to be developed is specified for each developing unit before copying or a process, and each developing unit is sequentially developed in the designated area. A color image forming apparatus is characterized in that a multicolor visible powder image can be formed by scanning a document once. 2) The color image forming apparatus according to claim 1, wherein the developing operation of each developing unit is performed by applying a developing bias voltage. 3) The color image forming apparatus according to claim 1, wherein the developing operation of each developing unit is performed by bringing a developing sleeve close to the surface of the latent image carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60042801A JPS61203474A (en) | 1985-03-06 | 1985-03-06 | Color image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60042801A JPS61203474A (en) | 1985-03-06 | 1985-03-06 | Color image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61203474A true JPS61203474A (en) | 1986-09-09 |
Family
ID=12646068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60042801A Pending JPS61203474A (en) | 1985-03-06 | 1985-03-06 | Color image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61203474A (en) |
Cited By (42)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3802558A1 (en) * | 1987-01-28 | 1988-08-11 | Minolta Camera Kk | Multicolour (chromatic) imaging device |
| DE3803489A1 (en) * | 1987-02-12 | 1988-08-25 | Minolta Camera Kk | Multicolour imaging apparatus |
| DE3744328A1 (en) * | 1987-07-03 | 1989-01-12 | Minolta Camera Kk | COUNTING SYSTEM FOR USE IN A COPIER |
| DE3822386A1 (en) * | 1987-07-01 | 1989-01-12 | Minolta Camera Kk | MULTICOLOR COPIER |
| DE3828257A1 (en) * | 1987-08-19 | 1989-03-02 | Minolta Camera Kk | Copier |
| DE3830811A1 (en) * | 1987-09-11 | 1989-03-23 | Minolta Camera Kk | Image recording system |
| US4831408A (en) * | 1986-08-08 | 1989-05-16 | Canon Kabushiki Kaisha | Electrophotographic apparatus capable of forming images in different colors |
| DE3837064A1 (en) * | 1987-10-31 | 1989-05-18 | Minolta Camera Kk | Copier |
| US4862216A (en) * | 1987-01-28 | 1989-08-29 | Minolta Camera Kabushiki Kaisha | Multicolor copying apparatus |
| US4866474A (en) * | 1987-01-23 | 1989-09-12 | Minolta Camera Kabushiki Kaisha | Copying apparatus capable of forming a composite image of an outline image and a normal image |
| US4884096A (en) * | 1987-07-15 | 1989-11-28 | Minolta Camera Kabushiki Kaisha | Multiple color image forming apparatus |
| US4885611A (en) * | 1987-02-26 | 1989-12-05 | Minolta Camera Kabushika Kaisha | Multicolor image forming apparatus |
| JPH0261662A (en) * | 1988-08-29 | 1990-03-01 | Ricoh Co Ltd | Image forming device |
| JPH0262561A (en) * | 1988-08-29 | 1990-03-02 | Canon Inc | Image forming device |
| US4914454A (en) * | 1988-04-14 | 1990-04-03 | Minolta Camera Kabushiki Kaisha | Image recording system capable of forming image with different colors in different areas |
| US4914486A (en) * | 1988-01-19 | 1990-04-03 | Minolta Camera Kabushiki Kaisha | Image forming apparatus having simultaneous multicolor copying mode |
| US4931875A (en) * | 1988-04-14 | 1990-06-05 | Minolta Camera Kabushiki Kaisha | Image recording system capable of forming image area by area |
| US4935781A (en) * | 1986-11-13 | 1990-06-19 | Minolta Camera Kabushiki Kaisha | Image forming apparatus having color editing function |
| US4935779A (en) * | 1987-03-25 | 1990-06-19 | Minolta Camera Kabushiki Kaisha | Single scan, multicolor imaging forming apparatus capable of adjusting the image density of each color |
| EP0375432A2 (en) * | 1988-12-22 | 1990-06-27 | Xerox Corporation | Method and apparatus for creating images |
| US4956679A (en) * | 1987-04-25 | 1990-09-11 | Minolta Camera Kabushiki Kaisha | Image forming apparatus |
| US4958190A (en) * | 1987-09-14 | 1990-09-18 | Minolta Camera Kabushiki Kaisha | Image forming apparatus |
| US4963935A (en) * | 1987-11-02 | 1990-10-16 | Minolta Camera Kabushiki Kaisha | Copying apparatus |
| US4989049A (en) * | 1987-01-26 | 1991-01-29 | Minolta Camera Kabushiki Kaisha | Multi-color image forming apparatus |
| US4990968A (en) * | 1987-07-28 | 1991-02-05 | Minolta Camera Kabushiki Kaisha | Multi-colored image forming apparatus |
| US5023705A (en) * | 1988-01-18 | 1991-06-11 | Minolta Camera Kabushiki Kaisha | Apparatus for forming a three color image including a first, a second, and a black color from two complimentary colors |
| US5025323A (en) * | 1988-01-22 | 1991-06-18 | Minolta Camera Kabushiki Kaisha | Deveoloping unit switching device for a printer |
| US5025288A (en) * | 1988-11-01 | 1991-06-18 | Minolta Camera Kabushiki Kaisha | Image forming apparatus capable of preventing simultaneous rotation of the magnet roll and the developing sleeve |
| US5028958A (en) * | 1987-08-21 | 1991-07-02 | Minolta Camera Kabushiki Kaisha | Copying apparatus with simultaneous multi-color single cycle copying |
| US5041876A (en) * | 1987-07-21 | 1991-08-20 | Minolta Camera Kabushiki Kaisha | Multi-color image forming apparatus incorporating selectively operable developing units for one cycle copying |
| US5047804A (en) * | 1987-07-27 | 1991-09-10 | Minolta Camera Kabushiki Kaisha | Image forming apparatus having a toner replenishment control system |
| US5057876A (en) * | 1989-03-06 | 1991-10-15 | Minolta Camera Kabushiki Kaisha | Image forming apparatus with an image editing function |
| US5066986A (en) * | 1988-02-03 | 1991-11-19 | Minolta Camera Kabushiki Kaisha | Image recording system for controlling developing devices |
| US5068690A (en) * | 1987-02-10 | 1991-11-26 | Minolta Camera Kabushiki Kaisha | Copying apparatus with image editing device |
| US5083162A (en) * | 1987-05-28 | 1992-01-21 | Minolta Camera Kabushiki Kaisha | Image duplicating apparatus including an editing function |
| US5113229A (en) * | 1988-07-26 | 1992-05-12 | Minolta Camera Kabushiki Kaisha | Multi-color copying machine having a simultaneous color copy mode and an edited area copy mode |
| US5115282A (en) * | 1987-11-09 | 1992-05-19 | Minolta Camera Kabushiki Kaisha | Copying apparatus capable of copying in two colors simultaneously |
| EP0488793A2 (en) * | 1990-11-29 | 1992-06-03 | Xerox Corporation | Method and apparatus for color printing |
| US5134440A (en) * | 1988-08-10 | 1992-07-28 | Minolta Camera Kabushiki Kaisha | Device and method for forming an image of a document in more than one color including automatic or user selection of colors to be used in specified areas of the document |
| US5144372A (en) * | 1987-11-20 | 1992-09-01 | Minolta Camera Kabushiki Kaisha | Copying machine operable in simultaneous multi-color mode |
| US5162853A (en) * | 1987-08-21 | 1992-11-10 | Minolta Camera Kabushiki Kaisha | Multiple color copying apparatus having a copy paper color detecting device |
| US5177530A (en) * | 1987-02-24 | 1993-01-05 | Minolta Camera Kabushiki Kaisha | Copying machine having plural developing units |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60166970A (en) * | 1984-02-09 | 1985-08-30 | Matsushita Electric Ind Co Ltd | Electrophotographic device |
-
1985
- 1985-03-06 JP JP60042801A patent/JPS61203474A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60166970A (en) * | 1984-02-09 | 1985-08-30 | Matsushita Electric Ind Co Ltd | Electrophotographic device |
Cited By (47)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4831408A (en) * | 1986-08-08 | 1989-05-16 | Canon Kabushiki Kaisha | Electrophotographic apparatus capable of forming images in different colors |
| US4935781A (en) * | 1986-11-13 | 1990-06-19 | Minolta Camera Kabushiki Kaisha | Image forming apparatus having color editing function |
| US4866474A (en) * | 1987-01-23 | 1989-09-12 | Minolta Camera Kabushiki Kaisha | Copying apparatus capable of forming a composite image of an outline image and a normal image |
| US4989049A (en) * | 1987-01-26 | 1991-01-29 | Minolta Camera Kabushiki Kaisha | Multi-color image forming apparatus |
| DE3802558A1 (en) * | 1987-01-28 | 1988-08-11 | Minolta Camera Kk | Multicolour (chromatic) imaging device |
| US4862216A (en) * | 1987-01-28 | 1989-08-29 | Minolta Camera Kabushiki Kaisha | Multicolor copying apparatus |
| US5068690A (en) * | 1987-02-10 | 1991-11-26 | Minolta Camera Kabushiki Kaisha | Copying apparatus with image editing device |
| DE3803489A1 (en) * | 1987-02-12 | 1988-08-25 | Minolta Camera Kk | Multicolour imaging apparatus |
| US5177530A (en) * | 1987-02-24 | 1993-01-05 | Minolta Camera Kabushiki Kaisha | Copying machine having plural developing units |
| US4885611A (en) * | 1987-02-26 | 1989-12-05 | Minolta Camera Kabushika Kaisha | Multicolor image forming apparatus |
| US4935779A (en) * | 1987-03-25 | 1990-06-19 | Minolta Camera Kabushiki Kaisha | Single scan, multicolor imaging forming apparatus capable of adjusting the image density of each color |
| US4956679A (en) * | 1987-04-25 | 1990-09-11 | Minolta Camera Kabushiki Kaisha | Image forming apparatus |
| US5083162A (en) * | 1987-05-28 | 1992-01-21 | Minolta Camera Kabushiki Kaisha | Image duplicating apparatus including an editing function |
| US4947210A (en) * | 1987-07-01 | 1990-08-07 | Minolta Camera Kabushiki Kaisha | Multi-color copying machine |
| DE3822386A1 (en) * | 1987-07-01 | 1989-01-12 | Minolta Camera Kk | MULTICOLOR COPIER |
| US5070363A (en) * | 1987-07-03 | 1991-12-03 | Minolta Camera Kabushiki Kaisha | Counting system for use in a copying machine |
| DE3744328A1 (en) * | 1987-07-03 | 1989-01-12 | Minolta Camera Kk | COUNTING SYSTEM FOR USE IN A COPIER |
| US4897697A (en) * | 1987-07-03 | 1990-01-30 | Minolta Camera Kabushiki Kaisha | Counting system for use in a copying machine |
| US4884096A (en) * | 1987-07-15 | 1989-11-28 | Minolta Camera Kabushiki Kaisha | Multiple color image forming apparatus |
| US5041876A (en) * | 1987-07-21 | 1991-08-20 | Minolta Camera Kabushiki Kaisha | Multi-color image forming apparatus incorporating selectively operable developing units for one cycle copying |
| US5047804A (en) * | 1987-07-27 | 1991-09-10 | Minolta Camera Kabushiki Kaisha | Image forming apparatus having a toner replenishment control system |
| US4990968A (en) * | 1987-07-28 | 1991-02-05 | Minolta Camera Kabushiki Kaisha | Multi-colored image forming apparatus |
| DE3828257A1 (en) * | 1987-08-19 | 1989-03-02 | Minolta Camera Kk | Copier |
| US5028958A (en) * | 1987-08-21 | 1991-07-02 | Minolta Camera Kabushiki Kaisha | Copying apparatus with simultaneous multi-color single cycle copying |
| US5162853A (en) * | 1987-08-21 | 1992-11-10 | Minolta Camera Kabushiki Kaisha | Multiple color copying apparatus having a copy paper color detecting device |
| US5084717A (en) * | 1987-09-11 | 1992-01-28 | Minolta Camera Kabushiki Kaisha | Image recording system |
| DE3830811A1 (en) * | 1987-09-11 | 1989-03-23 | Minolta Camera Kk | Image recording system |
| US4958190A (en) * | 1987-09-14 | 1990-09-18 | Minolta Camera Kabushiki Kaisha | Image forming apparatus |
| DE3837064A1 (en) * | 1987-10-31 | 1989-05-18 | Minolta Camera Kk | Copier |
| US4963935A (en) * | 1987-11-02 | 1990-10-16 | Minolta Camera Kabushiki Kaisha | Copying apparatus |
| US5115282A (en) * | 1987-11-09 | 1992-05-19 | Minolta Camera Kabushiki Kaisha | Copying apparatus capable of copying in two colors simultaneously |
| US5144372A (en) * | 1987-11-20 | 1992-09-01 | Minolta Camera Kabushiki Kaisha | Copying machine operable in simultaneous multi-color mode |
| US5023705A (en) * | 1988-01-18 | 1991-06-11 | Minolta Camera Kabushiki Kaisha | Apparatus for forming a three color image including a first, a second, and a black color from two complimentary colors |
| US4914486A (en) * | 1988-01-19 | 1990-04-03 | Minolta Camera Kabushiki Kaisha | Image forming apparatus having simultaneous multicolor copying mode |
| US5025323A (en) * | 1988-01-22 | 1991-06-18 | Minolta Camera Kabushiki Kaisha | Deveoloping unit switching device for a printer |
| US5066986A (en) * | 1988-02-03 | 1991-11-19 | Minolta Camera Kabushiki Kaisha | Image recording system for controlling developing devices |
| US4931875A (en) * | 1988-04-14 | 1990-06-05 | Minolta Camera Kabushiki Kaisha | Image recording system capable of forming image area by area |
| US4914454A (en) * | 1988-04-14 | 1990-04-03 | Minolta Camera Kabushiki Kaisha | Image recording system capable of forming image with different colors in different areas |
| US5113229A (en) * | 1988-07-26 | 1992-05-12 | Minolta Camera Kabushiki Kaisha | Multi-color copying machine having a simultaneous color copy mode and an edited area copy mode |
| US5134440A (en) * | 1988-08-10 | 1992-07-28 | Minolta Camera Kabushiki Kaisha | Device and method for forming an image of a document in more than one color including automatic or user selection of colors to be used in specified areas of the document |
| JPH0262561A (en) * | 1988-08-29 | 1990-03-02 | Canon Inc | Image forming device |
| JPH0261662A (en) * | 1988-08-29 | 1990-03-01 | Ricoh Co Ltd | Image forming device |
| US5025288A (en) * | 1988-11-01 | 1991-06-18 | Minolta Camera Kabushiki Kaisha | Image forming apparatus capable of preventing simultaneous rotation of the magnet roll and the developing sleeve |
| JPH02306272A (en) * | 1988-12-22 | 1990-12-19 | Xerox Corp | Formation of contrasted image by almost total contrast voltage |
| EP0375432A2 (en) * | 1988-12-22 | 1990-06-27 | Xerox Corporation | Method and apparatus for creating images |
| US5057876A (en) * | 1989-03-06 | 1991-10-15 | Minolta Camera Kabushiki Kaisha | Image forming apparatus with an image editing function |
| EP0488793A2 (en) * | 1990-11-29 | 1992-06-03 | Xerox Corporation | Method and apparatus for color printing |
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