JPS62131270A - Electrophotographic method - Google Patents

Electrophotographic method

Info

Publication number
JPS62131270A
JPS62131270A JP60271234A JP27123485A JPS62131270A JP S62131270 A JPS62131270 A JP S62131270A JP 60271234 A JP60271234 A JP 60271234A JP 27123485 A JP27123485 A JP 27123485A JP S62131270 A JPS62131270 A JP S62131270A
Authority
JP
Japan
Prior art keywords
original
light source
lamps
lamp
output
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
JP60271234A
Other languages
Japanese (ja)
Inventor
Takeshi Watanabe
毅 渡辺
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 JP60271234A priority Critical patent/JPS62131270A/en
Publication of JPS62131270A publication Critical patent/JPS62131270A/en
Pending legal-status Critical Current

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  • Developing For Electrophotography (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To emphasize the color tone of a specific original and to regenerate the original by adjusting the output distribution of plural lamps having different light source colors to project the original and varying a developing condition in accordance with the output distribution of respective lamps. CONSTITUTION:When fluorescent lamps 11, 12 having different spectral energy distribution respectively project the surface of the original set up on an original platen glass 6, an electrostatic latent image is formed on the surface of a photosensitive drum 1 and developed by a developing device 3 to form a developed image, which is transferred to a transfer material by a transfer charger 4. The lamps 11, 12 have green and pink light source colors respectively, and usually both lamps 11, 12 project the original with the same intensity. To regenerate the vermilion color of a seal impression or the like, the output of the green light source lamp 11 is increased and the frequency of a developing bias is set up to high frequency, and in case of a blue thin line or a solid part photographing, the output of the pink light source lamp 12 is increased and the frequency of a developing bias is reduced.

Description

【発明の詳細な説明】 〔発明の目的〕 「産業上の利用分野」 本発明は電子写真装置、静電2鎌装置等の画像形成装置
に使用される照明方法と現像方法に関し1両者の条件の
最適値を選択しどんな原稿に対しても常に良好な画像を
得るための電子写真法に関する。
[Detailed Description of the Invention] [Objective of the Invention] "Industrial Application Field" The present invention relates to an illumination method and a developing method used in an image forming apparatus such as an electrophotographic apparatus or an electrostatic two-scythe apparatus. This paper relates to an electrophotographic method for selecting the optimum value of and consistently obtaining good images for any original.

「従来の技術」 電子写真、静電記録装置等画像形成装置の原稿を照明す
るのに各種のランプが用いられている。一般的に多いも
のとしてはハロゲンランプ、螢光灯ランプなどである。
``Prior Art'' Various lamps are used to illuminate original documents in image forming apparatuses such as electrophotographic and electrostatic recording apparatuses. Commonly used lamps include halogen lamps and fluorescent lamps.

一方原稿の種類としては一般文書あり、新聞、カタログ
、写真等千差万別である。文字などを複写することは当
然のこと写真の中での各種の色の再現、一般文書中の印
鑑の朱色の再現、グラフ用紙の細線の背の再現と又補色
の再現も機械の能力として求められる。
On the other hand, there are a wide variety of manuscript types, including general documents, newspapers, catalogs, and photographs. Copying text, etc. is a matter of course, but machines are also required to reproduce various colors in photographs, reproduce the vermilion color of seals in general documents, reproduce the spine of thin lines on graph paper, and reproduce complementary colors. It will be done.

側面断面図で示す第6図で従来の電子写真装置の例を説
明する。原稿ランプ8によって原稿台ガラス6上の原稿
は照射され反射された光像はレンズアレイ5を通って図
示矢印方向に原稿台ガラス6の移動に同期回転する感光
ドラム1上に照射され帯電器2によって一様電荷を保持
した感光ドラム1上に静電潜像を形成する。静電潜像は
現像装@、3によって顕画像化される。
An example of a conventional electrophotographic apparatus will be described with reference to FIG. 6, which is a side sectional view. The original on the original platen glass 6 is irradiated by the original lamp 8, and the reflected light image passes through the lens array 5 and is irradiated onto the photosensitive drum 1, which rotates in synchronization with the movement of the original platen glass 6 in the direction of the arrow shown in the figure, and is applied to the charger 2. An electrostatic latent image is formed on the photosensitive drum 1 which holds a uniform charge. The electrostatic latent image is made into a visible image by the developing device @3.

感光ドラム1上の顕画像は転写帯電器4によって不図示
の給紙装置から送りこまれた転写材に転写されて不図示
の定着装置に送られて定着される。感光ドラム1上の残
留現像剤はクリーニング装置7によってクリーニングさ
れる。
The developed image on the photosensitive drum 1 is transferred by a transfer charger 4 onto a transfer material fed from a paper feeding device (not shown), and then sent to a fixing device (not shown) where it is fixed. The residual developer on the photosensitive drum 1 is cleaned by a cleaning device 7.

原稿の各々の色を再現するためにランプの光源の種類と
第6図に示すフィルター9を組み合せて照明装置を形成
している。これが通常の機械に用いられている。しかし
人によっては赤色再現(特に印鑑)を最も求める人ある
いは青色再現のみを求める人など電々様々である。
In order to reproduce each color of the original, an illumination device is formed by combining the types of lamp light sources and the filter 9 shown in FIG. 6. This is used in normal machines. However, there are many different types of people, such as those who most desire red reproduction (particularly for seals) and those who only desire blue reproduction.

以上の様な希望をかなえる方法としては第6図のフィル
ターを数種類内蔵し、必要に応じてフィルターを交換す
る方法もある。又第1図に概略図に示す様にランプ11
.12をレンズアレイ両側に配置しそれぞれのランプが
異なる光源色ランプで構成され必要に応じて各々の光の
強さを変えて必要な色の再現を行なうものもある。
One way to fulfill the above wishes is to incorporate several types of filters as shown in Figure 6, and replace the filters as necessary. Also, as shown schematically in FIG.
.. 12 are arranged on both sides of the lens array, each lamp is composed of a lamp with a different light source color, and the intensity of each light is changed as necessary to reproduce the required color.

確かに前記各方法は色再現に極めて有効な方法である。It is true that each of the above methods is extremely effective for color reproduction.

「発明が解決しようとする問題点」 しかし、再現したい再現色によって原稿の糧類が異なる
。即ち赤色は印鑑、その他大学等が多く、一方青色はグ
ラフ用紙の1線、着色面積の大きいいわゆるベタ部など
が比較的多い。従って、上記方法では原稿の色調により
、或は再現したい色によりフィルター9を変更すること
は手間のか\ることである。螢光灯ランプ11゜12の
光の強さを変更することは操作が容易ではあるがこれだ
けで色再現したい部分に相当対応して所望の複写をとる
ことができるが、更に細線或はベタ部の鮮明な画像を強
調できれば好都合である。
``Problems to be solved by the invention'' However, the type of manuscript will differ depending on the color you want to reproduce. That is, the red color is often used for seals and other universities, while the blue color is used for single lines on graph paper, so-called solid areas with a large colored area, and the like. Therefore, in the above method, it is time-consuming to change the filter 9 depending on the color tone of the original or the color desired to be reproduced. Although it is easy to operate by changing the intensity of the light from the fluorescent lamps 11 and 12, it is possible to make the desired copy corresponding to the area for which color reproduction is desired. It would be advantageous if a clear image of the image could be emphasized.

本発明は電子写真装置、静電記録装置等の画像形成装置
において通常は平均的な色再現をして一般的な用途に供
し自動あるいは手動によって特別な色のみを再現できる
様にした照明装置、現像装置を提供することを目的とす
るものである。
The present invention relates to an illumination device that normally reproduces average colors in image forming devices such as electrophotographic devices and electrostatic recording devices for general use, and that can automatically or manually reproduce only special colors. The object of the present invention is to provide a developing device.

〔発明の構成〕[Structure of the invention]

「問題点を解決するための手段」 本発明は異なる光源色を持つ複数のランプの夫々出力配
分を調整して原稿を照射して原稿像の走査を行ない、該
原稿像を感光体lこ投影して潜像を形成し、ついで該潜
像を各々のランプの出力の配分に応じて現像条件を可変
とする工程を備えた電子写真法である。
"Means for Solving the Problem" The present invention adjusts the output distribution of each of a plurality of lamps having different light source colors, irradiates the original, scans the original image, and projects the original image onto a photoreceptor. This is an electrophotographic method that includes the steps of forming a latent image by using a plurality of lamps, and then changing the developing conditions of the latent image according to the distribution of the output of each lamp.

「作用」 複数原稿ランプを選択的に光度を変えて点灯することに
より原稿を照明する光の分光エネルギー分布を変えるこ
とができて特定の原稿の色調を強調して再現できる。一
方現像条件例えばジャンピング現像方式の時のAC現像
バイアスを変えて細線再現を強調するかあるいはベタ部
再現を強調するかする。
"Function" By selectively lighting multiple original lamps with different luminous intensities, the spectral energy distribution of the light that illuminates the original can be changed, and the color tone of a particular original can be emphasized and reproduced. On the other hand, the development conditions, for example, the AC development bias in the case of a jumping development method, are changed to emphasize reproduction of fine lines or reproduction of solid areas.

「実施例」 以下、本発明の実施例を図面に従って説明する。第1図
は本発明の実施例の側面断面図である。原稿台ガラス6
は動作時図示矢印方向に往復動するように支持されてお
り、その下方に反射と遮光を行なう反射板14を夫々備
える分光エネルギー分布の異なる螢光灯ランプ1.12
が配され原稿台ガラス6上の原稿面を照射するようにな
っていて、照射された光は原稿Iこて反射しその光像は
固設しであるレンズアレイ5をとおり、原稿台ガラス6
と同期して回転する光導電性感光体を層持する感光ドラ
ム1の表面に結像する。感光ドラム1は帯電器2により
一様帯電されており、露光により静電潜像がその表面に
形成せられ、現像装置3により現像剤を供給されて静電
潜像は顕画像となり、転写帯電器4において不図示の給
紙装置より送られた転写材に該顕画像は転写され転写材
は不図示の定着装置に送られて定着され装置外に排出さ
れる。
"Embodiments" Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view of an embodiment of the invention. Original table glass 6
Fluorescent lamps 1.12 with different spectral energy distributions are supported so as to reciprocate in the direction of the arrows shown during operation, and are each provided with a reflector plate 14 below which reflects and blocks light.
is arranged to illuminate the original surface on the original platen glass 6, the irradiated light is reflected by the original plate I, the light image passes through the fixed lens array 5, and is directed onto the original platen glass 6.
The image is formed on the surface of a photosensitive drum 1 having a layer of photoconductive photoreceptors that rotates in synchronization with the image. The photosensitive drum 1 is uniformly charged by a charger 2, and an electrostatic latent image is formed on its surface by exposure, and a developing device 3 supplies a developer to turn the electrostatic latent image into a visible image, which is then transferred and charged. In the container 4, the developed image is transferred onto a transfer material fed from a paper feeding device (not shown), and the transfer material is sent to a fixing device (not shown), fixed thereon, and discharged from the device.

転写帯電器4の位置を通過した感光ドラム1は残留現像
剤をクリーニング装置7により除去され前露光ランプ1
3を照射されて前歴を消去される。
After the photosensitive drum 1 has passed the transfer charger 4, residual developer is removed by the cleaning device 7, and the photosensitive drum 1 is exposed to the pre-exposure lamp 1.
3 will be irradiated and his previous history will be erased.

螢光灯ランプ11は光源色が緑色のランプであり横軸に
波長、縦軸に比エネルギーを示した第2図のAの分光エ
ネルギー分布を持つ。螢光灯ランプ12は光源色桃色の
ランプであり第2図のBの分光エネルギー分布を持つ。
The fluorescent lamp 11 is a lamp whose light source color is green, and has a spectral energy distribution of A in FIG. 2, with the horizontal axis representing the wavelength and the vertical axis representing the specific energy. The fluorescent lamp 12 has a pink light source and has a spectral energy distribution of B in FIG.

通常は2つのランプ11.12ともに同等の強さをもっ
て原稿を照射する。そのため分光エネルギー分布は第2
図のAとBとの和となり比較的平均化する。故に通常複
写においては各々色が平均的に再現し、通常の用途とし
て使用される。このためフィルターを必要としないし一
本では光量不足ぎみの螢光灯も二本用いることで充分と
なる。
Normally, both lamps 11 and 12 illuminate the document with equal intensity. Therefore, the spectral energy distribution is
It becomes the sum of A and B in the figure and is relatively averaged. Therefore, in normal copying, each color is reproduced on an average basis and used for normal purposes. Therefore, there is no need for a filter, and it is sufficient to use two fluorescent lamps, even though one fluorescent lamp would not provide enough light.

又ハロゲンランプと比較すると熱の発生が極めて少なく
特別の排熱装置も必要としない。
Furthermore, compared to halogen lamps, they generate very little heat and do not require any special heat exhaust equipment.

文人によっては印鑑の朱色ははっきりと再現され、グラ
フ用紙の青い細線は再現させたくない場合もある。その
時は人による手動スイッチの切換信号により螢光灯ラン
プ11.12の光量バランスを変える。即ち螢光灯ラン
プ11の緑色光源色ランプの光量を多くシ、螢光灯ラン
プ12の光量を少なくする。しかしこの時光量の和は通
常時で同等とする。又、赤系統の色の再現を押え青色系
の再現を顕著にする場合は螢光灯ランプ11の光量を小
さくし、螢光灯ランプ12の光量を大きくする。20は
現像装置の現像ローラに加える現像バイアス電源であり
、得たい画像状態になるように手動又はランプ11゜1
2の光度調整を連動して作動するようになっている。
Some writers may want to reproduce the vermilion color of their seals clearly, but not the fine blue lines of graph paper. At that time, the light intensity balance of the fluorescent lamps 11 and 12 is changed by a switching signal from a manual switch by a person. That is, the amount of light from the green light source color lamp of the fluorescent lamp 11 is increased, and the amount of light from the fluorescent lamp 12 is decreased. However, it is assumed that the sum of the amounts of light at this time is the same under normal conditions. In addition, in order to suppress the reproduction of red colors and make the reproduction of blue colors more prominent, the light amount of the fluorescent lamp 11 is decreased and the light amount of the fluorescent lamp 12 is increased. Reference numeral 20 denotes a developing bias power supply that is applied to the developing roller of the developing device.
It is designed to operate in conjunction with the light intensity adjustment in step 2.

又、現像時におけるライン等文字の再現とベタ部等の再
現に関してジャンピング現像を例にとり横軸に感光ドラ
ム1上の静電潜像電位をとり縦軸に画像濃度をとり画像
濃度曲線を表わす第6図で説明する。パラメータとして
示す現像バイアスの周波数を高くすると電位と画像濃度
曲線即ちγが例えば図示点線のように立ってくるし、低
くするとγは図示実線のように清かになる。γが立って
くると文字の再現が非常に良好となるし、一方、γが滑
かになると各徨中間色調を持つ広い面積の着色部即ちベ
タ部写真等の再現は極めて良好となる。
In addition, regarding the reproduction of characters such as lines and solid areas during development, taking jumping development as an example, the horizontal axis represents the electrostatic latent image potential on the photosensitive drum 1, and the vertical axis represents the image density, and an image density curve is expressed. This will be explained using Figure 6. If the frequency of the developing bias shown as a parameter is increased, the potential and image density curve, ie, γ, will rise as shown by the dotted line in the figure, for example, and if it is decreased, γ will become clearer, as shown by the solid line in the figure. When γ is high, the reproduction of characters is very good, and on the other hand, when γ is smooth, the reproduction of a wide area colored part, that is, a solid photograph, etc., having various halftones is very good.

即ち印鑑等の朱色の再現をしたい時は、一般に印鑑は一
般文書の中に用いられるしかつはっきりと印鑑を再現さ
せなければならない。そのためランプ出力は緑色光源ラ
ンプAの出力を犬きくかつ現像バイアスの周波数は高周
波が望しい。一方、青色細線あるいはベタ部写真は青色
再現のため桃色光源ランプBの出力を大きくかつベタ部
再現のため現像バイアスの周波数を低周波にする。又青
色再現は一般にグラフ用紙等でありグラフ用紙の再現は
グラフを読みとるため再現しなければならないがあまり
画像濃度が高過ぎると、必要とするデータが読みづらい
ということになる。そのため低周波による再現が極めて
有効となる。
That is, when it is desired to reproduce the vermilion color of a seal, etc., the seal is generally used in a general document, and the stamp must be clearly reproduced. Therefore, it is desirable that the lamp output be higher than the output of the green light source lamp A, and that the frequency of the developing bias be high. On the other hand, for blue thin lines or solid area photographs, the output of the pink light source lamp B is increased to reproduce the blue color, and the frequency of the developing bias is set to a low frequency to reproduce the solid area. Furthermore, blue color is generally reproduced using graph paper, etc., and graph paper must be reproduced in order to read the graph, but if the image density is too high, it will be difficult to read the required data. Therefore, reproduction using low frequencies is extremely effective.

第4図にランプ出力比(縦軸)と現像バイアス周波数(
横軸)の関係の例を示す。ランプ出力比は緑色光源ラン
プ/桃色光源ランプとなっている。その比が大きくなる
程緑色光源ランプの出力が大きくなりその時現像バイア
スを手動又は連動して高周波側にする。
Figure 4 shows the lamp output ratio (vertical axis) and developing bias frequency (
(horizontal axis). The lamp output ratio is green light source lamp/pink light source lamp. As the ratio increases, the output of the green light source lamp increases, and at that time, the developing bias is set to the high frequency side manually or in conjunction.

第1図では光源色が緑色、桃色を例1ことって説明した
が組み合せは種々ある。例えば、光源色白色と緑色の組
み合せ、光源色が青色と黄色の組み合せなどである。又
、実施例の現像法はジャンピング現像を例にとって説明
したがこれに限ぎることはなく種々の電界の効果を用い
た現像法との組み合せにおいても有効である。
In FIG. 1, example 1 is described in which the light source colors are green and pink, but there are various combinations. For example, a combination of light source colors of white and green, a combination of light source colors of blue and yellow, etc. Further, although the developing method of the embodiment has been explained by taking jumping development as an example, it is not limited to this, and it is also effective in combination with developing methods using various electric field effects.

第5図に本発明の他の実施例の側面断面図を示す。第5
図において照明装置を除く電子写真各装置は第1図と同
じであり説明は省略する。
FIG. 5 shows a side sectional view of another embodiment of the invention. Fifth
In the figure, each electrophotographic device except the illumination device is the same as in FIG. 1, and a description thereof will be omitted.

照明装置は螢光灯ランプ15〜18が夫々原稿台ガラス
6上の原稿の同一個所を選択的な光度で照射するように
配されていて、螢光灯ランプ15は青色光源色ランプ、
螢光灯ランプ16は緑色光源色ランプ、螢光灯ランプ1
7は黄色光源色ランプ、螢光灯ランプ18は桃色光源色
ランプとする。通常ははゾ同等光量とする。各徨自動手
動等の信号によって各ランプの光量バランスを変えて再
現させたい色を自由に選択することが可能となる。
The illumination device includes fluorescent lamps 15 to 18, each of which is arranged to irradiate the same part of the document on the document platen glass 6 with a selective luminous intensity, and the fluorescent lamp 15 is a blue light source color lamp;
The fluorescent lamp 16 is a green light source color lamp, and the fluorescent lamp 1 is a green light source color lamp.
7 is a yellow light source color lamp, and the fluorescent lamp 18 is a pink light source color lamp. Normally, the amount of light should be equivalent to 1. It becomes possible to freely select the color to be reproduced by changing the light intensity balance of each lamp using signals such as automatic and manual.

〔発明の効果〕〔Effect of the invention〕

本発明は異なる光源色を持つ複数のランプの夫々出力配
分を調整して原稿を照射して原稿像の走査を行ない、該
原稿像を感光体に投影して潜像を形成し、ついで該潜像
を各々のランプの出力の配分に応じて現像条件を可変と
する工程を備えた電子写真法としたから、原稿の色調に
対して特に再生したい画像部分を線画、広い面積の同色
部lこ対応して強調することができる。
The present invention adjusts the output distribution of each of a plurality of lamps having different light source colors, irradiates the document, scans the document image, projects the document image onto a photoreceptor to form a latent image, and then scans the document image. Since the electrophotographic method has a process of varying the developing conditions according to the distribution of the output of each lamp, the image part that is particularly desired to be reproduced is drawn as a line drawing, and a large area of the same color is drawn. It can be emphasized accordingly.

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

第1図は本発明の実施に用いられる装置の側面断面図、
第2図は第1図におけるランプの分光エネルギー分布を
示す線図、第3図は第1図における現像装置による画像
濃度曲線を示す線図、第4図はランプ出力比と現像バイ
アス周波数の関係を示す線図、第5図は他の実施例の側
面断面図、第6図は従来例の側面断面図である。 1・・感光ドラム 2・・帯電器 6・・現像装置 4
・・転写帯電器 5・・レンズアレイ 6・・原稿台ガ
ラス 7・・クリーニング装置 8・・原稿ランプ 9
・・フィルター11.12・・螢光灯ランプ 13・・
前露光ランプ 14・・反射板 15〜18・・螢光灯
ランプ 20・・現像バイアス電源 A・・緑色光源ラ
ンプ B・・桃色光源ランプ。
FIG. 1 is a side sectional view of an apparatus used for carrying out the present invention;
Figure 2 is a diagram showing the spectral energy distribution of the lamp in Figure 1, Figure 3 is a diagram showing the image density curve of the developing device in Figure 1, and Figure 4 is the relationship between lamp output ratio and developing bias frequency. FIG. 5 is a side sectional view of another embodiment, and FIG. 6 is a side sectional view of a conventional example. 1. Photosensitive drum 2. Charger 6. Developing device 4
・・Transfer charger 5・・Lens array 6・・Document table glass 7・・Cleaning device 8・・・Document lamp 9
...Filter 11.12...Fluorescent lamp 13...
Pre-exposure lamp 14...Reflector plate 15-18...Fluorescent lamp 20...Development bias power supply A...Green light source lamp B...Pink light source lamp.

Claims (1)

【特許請求の範囲】[Claims] 1、異なる光源色を持つ複数のランプの夫々出力配分を
調整して原稿を照射して原稿像の走査を行ない、該原稿
像を感光体に投影して潜像を形成し、ついで該潜像を各
々のランプの出力の配分に応じて現像条件を可変とする
工程を備えた電子写真法。
1. Adjust the output distribution of each of a plurality of lamps with different light source colors, irradiate the document, scan the document image, project the document image onto a photoreceptor to form a latent image, and then scan the document image. An electrophotographic method that includes a process in which developing conditions are varied according to the distribution of output from each lamp.
JP60271234A 1985-12-02 1985-12-02 Electrophotographic method Pending JPS62131270A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60271234A JPS62131270A (en) 1985-12-02 1985-12-02 Electrophotographic method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60271234A JPS62131270A (en) 1985-12-02 1985-12-02 Electrophotographic method

Publications (1)

Publication Number Publication Date
JPS62131270A true JPS62131270A (en) 1987-06-13

Family

ID=17497223

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60271234A Pending JPS62131270A (en) 1985-12-02 1985-12-02 Electrophotographic method

Country Status (1)

Country Link
JP (1) JPS62131270A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52102729A (en) * 1976-02-25 1977-08-29 Ricoh Co Ltd Original copy illumination for monochroic electronic copying machine
JPS5619068A (en) * 1979-07-25 1981-02-23 Canon Inc Electrophotographic copier
JPS57116365A (en) * 1981-01-13 1982-07-20 Canon Inc Electrostatic recorder
JPS57146275A (en) * 1981-03-05 1982-09-09 Canon Inc Picture forming method
JPS58179852A (en) * 1982-04-15 1983-10-21 Ricoh Co Ltd Exposing device of copying machine
JPS592062A (en) * 1982-06-26 1984-01-07 Canon Inc Image formation device
JPS60178469A (en) * 1984-02-27 1985-09-12 Canon Inc Electrophotographic control method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52102729A (en) * 1976-02-25 1977-08-29 Ricoh Co Ltd Original copy illumination for monochroic electronic copying machine
JPS5619068A (en) * 1979-07-25 1981-02-23 Canon Inc Electrophotographic copier
JPS57116365A (en) * 1981-01-13 1982-07-20 Canon Inc Electrostatic recorder
JPS57146275A (en) * 1981-03-05 1982-09-09 Canon Inc Picture forming method
JPS58179852A (en) * 1982-04-15 1983-10-21 Ricoh Co Ltd Exposing device of copying machine
JPS592062A (en) * 1982-06-26 1984-01-07 Canon Inc Image formation device
JPS60178469A (en) * 1984-02-27 1985-09-12 Canon Inc Electrophotographic control method

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