JPS59206843A - Electrostatic recording device - Google Patents
Electrostatic recording deviceInfo
- Publication number
- JPS59206843A JPS59206843A JP58060905A JP6090583A JPS59206843A JP S59206843 A JPS59206843 A JP S59206843A JP 58060905 A JP58060905 A JP 58060905A JP 6090583 A JP6090583 A JP 6090583A JP S59206843 A JPS59206843 A JP S59206843A
- Authority
- JP
- Japan
- Prior art keywords
- picture
- gradation
- recording
- charging
- density
- 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
- G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
- G03G15/5025—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the original characteristics, e.g. contrast, density
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分骨〕
本発明は、電子写真感光体(以下、単に感光体と云う、
)の表面を帯電装置によって均一に帯電し、露光装置に
より前記帯電表面に露光を行って静電潜像を形成し、該
静電潜像を現像装置によってトナー像に現像した後、ト
ナー像を記録紙に転写、定着する記録装置に関する。[Detailed Description of the Invention] [Industrial Application] The present invention relates to an electrophotographic photoreceptor (hereinafter simply referred to as a photoreceptor).
) is uniformly charged by a charging device, the charged surface is exposed to light by an exposure device to form an electrostatic latent image, and the electrostatic latent image is developed into a toner image by a developing device. It relates to a recording device that transfers and fixes onto recording paper.
従来、上述のような静電記録装置においても、帯電、露
光、現像等の各プロセスの条件を制御調節する手段が設
けられていたが、それは、最高濃度の調節やカプリの防
止等、特定レベルにおける濃度調節を目的として設けら
れたものであった。Conventionally, electrostatic recording devices such as those described above have been provided with means to control and adjust the conditions of each process such as charging, exposure, and development. It was established for the purpose of adjusting the concentration in.
他方、電子写真方法において、再生される画像の階調性
即ち、γ値を変えることも知られているが、階調性を変
えるには各プロセスの条件を微妙に調整することが必要
とされていた。On the other hand, in electrophotographic methods, it is also known to change the gradation of reproduced images, that is, the γ value, but changing the gradation requires delicate adjustment of the conditions of each process. was.
従って、特定の階調性を持つ機械を作ることはできるが
、一つの機械で自由に階調を変えることは困難であると
されていた。Therefore, although it was possible to create a machine with a specific gradation, it was considered difficult to freely change the gradation using a single machine.
本発明は再生画像の階調を変えることができる静電記録
装置を提供することを目的とする。An object of the present invention is to provide an electrostatic recording device that can change the gradation of a reproduced image.
本発明は、少くとも帯電、露光、現像の各プロセス手段
を含む静電記録装置であって、再生記録画像の濃度が高
いか、低い(濃度ゼロを含む)かの画像記録を行うのに
適した再生記録系のγ値と連続階調の画像記録を行うの
に適した再生記録系のγ値とを選択できる選択手段を有
するととを特徴とする静電記録装置、にある。The present invention is an electrostatic recording device that includes at least each process means of charging, exposure, and development, and is suitable for recording images in which the density of reproduced recorded images is high or low (including zero density). An electrostatic recording apparatus characterized by having a selection means for selecting a γ value of a reproduction recording system suitable for performing continuous tone image recording.
本発明において、再生記録画像の濃度が高いか低いかの
画像記録を行うに適した再生記録系のγ値と連続階調の
画像記録を行うのに適した再生記録系のγ値の選択は、
感光体表面の帯電電位と露光量との組合せを選択するこ
とによってできる。In the present invention, the selection of the γ value of the reproduction recording system suitable for recording an image with high or low density of the reproduction recorded image and the γ value of the reproduction recording system suitable for recording a continuous tone image is carried out. ,
This can be done by selecting a combination of the charged potential on the surface of the photoreceptor and the amount of exposure.
しかして、感光体表面の均一帯電の電位を変える手段と
しては、帯電装置のコロナ放電極に印加する電圧を変化
する方法、グリッド電極等制御電極のバイアス電圧を変
化する方法、帯電後に均一露光して電位を一様に下げる
方法、感光体の速度を変える方法等の従来公知の方法が
用いられる。As a means of changing the uniform charging potential on the surface of the photoreceptor, there are methods such as changing the voltage applied to the corona discharge electrode of the charging device, changing the bias voltage of a control electrode such as a grid electrode, and uniformly exposing the surface of the photoreceptor after charging. Conventionally known methods can be used, such as a method of uniformly lowering the potential using a photoreceptor, and a method of changing the speed of the photoreceptor.
また、露光量を変える手段としては、原稿照明ランプの
光量を変える方法、露光光学系に減光フィルタや絞り等
を設ける方法、スリット露光の場合にはさらに走査速度
を変える方法等の従来公知の方法が用いられる。In addition, as means for changing the exposure amount, there are conventionally known methods such as changing the light amount of the original illumination lamp, installing a neutral density filter or diaphragm in the exposure optical system, and further changing the scanning speed in the case of slit exposure. method is used.
と\で、帯電電位の変更または露光量の変更のいずれか
一方に速度を変える方法を用いた場合には、他方の変更
はそれ以外の方法によるようにするのが帯電電位と露光
量との関連する変化量の組合せを自由に設定し得るので
好ましい。しかし、記録する画像の種類によって帯電電
位と露光量とを変える場合は、次に説明するように、帯
電電位と露光量とを共に高め、あるいは共に下げるよう
に変更することになるから、両者の変更を速度の切換え
によって行うようにしても従来の静電記録装置における
よりは鮮明か再現記録を行うことができる。If the method of changing the speed is used to change either the charging potential or the exposure amount, the other method should be used to change the other one because of the relationship between the charging potential and the exposure amount. This is preferable because combinations of related variation amounts can be freely set. However, when changing the charging potential and exposure amount depending on the type of image to be recorded, the charging potential and exposure amount must be changed to either increase or decrease both, as explained below. Even if the change is made by switching the speed, it is possible to record more clearly and reproducibly than in conventional electrostatic recording devices.
次に、以上のような帯電電位の変更手段及び露光量の変
更手段を利用して、どのように帯電電位及び露光量を変
化させるかKついて、第1図及び第2図を参照して説明
する。Next, how to change the charging potential and exposure amount using the above-mentioned charging potential changing means and exposure amount changing means will be explained with reference to FIGS. 1 and 2. do.
第1図は感光体に有機感光体を用い、現像剤に導電性磁
性トナーを用いた場合の感光体表面電位と現像濃度との
関係を示すグラフ、第2図はセンシトメトリーグラフで
ある。FIG. 1 is a graph showing the relationship between the surface potential of the photoreceptor and the development density when an organic photoreceptor is used as the photoreceptor and a conductive magnetic toner is used as the developer, and FIG. 2 is a sensitometry graph.
第1図に示したような感光体表面電位と現像濃度の関係
が得られる静電記録装置において、感光体の帯電電位を
その現像濃度が十分に飽和するようなマイナスの電位で
500v程度にまで高めて、原稿の黒色部が約400V
、白色部が約50Vとなる様な露光量で露光すると、
得られた静電潜像を第1図の現像条件と同じ条件で現像
し、記録紙に転写定着したコピー画像濃度と原稿の画像
濃度の関係は第2図のA曲線のようKなる。それに対し
て、同じ感光体の帯電電位をその現像濃度が飽和段階を
少しく過ぎたよりな300V程度に低くして、なお且つ
、原稿の黒色部が約250V 、白色部が約50Vとな
る様に露光量を低くして露光すると、同じ条件で現像、
転写したコピー画像濃度と原稿の画像濃度の関係は第2
図の8曲線のようになる。In an electrostatic recording device that can obtain the relationship between the photoreceptor surface potential and the developed density as shown in Figure 1, the charged potential of the photoreceptor is raised to about 500 V at a negative potential that satisfies the developed density. Increase the voltage to about 400V for the black part of the original.
, when exposed with an exposure amount such that the white part becomes about 50V,
The electrostatic latent image obtained is developed under the same developing conditions as those shown in FIG. 1, and the relationship between the density of the copy image transferred and fixed onto the recording paper and the image density of the original is expressed by curve A in FIG. 2. On the other hand, the charging potential of the same photoreceptor is lowered to about 300V, which is just beyond the saturation stage, and the exposure is made so that the black part of the original is about 250V and the white part is about 50V. If you expose with a lower amount, you will be able to develop and develop under the same conditions.
The relationship between the transferred copy image density and the original image density is the second
It will look like the 8th curve in the figure.
センシトメ) IJ−曲線Aは、原稿画像濃度0.7に
対してコピー画像濃度が略1.0となるセンシトメトリ
ーのγが1よシも大きい、しかも、原稿画像濃度0.3
ではコピー画像濃度が0.1以下となる、文字や網点写
真等の記録に適した条件である。また、センシトメトリ
ー曲線Bは、コピー画像濃度(5)
が少くとも1.1までは原稿画像濃度に比例して変化す
る、センシトメトリーのγが略1.0の銀塩写真等の記
録に適した条件である。Sensitometric) IJ-curve A has a sensitometric γ greater than 1, which makes the copy image density approximately 1.0 compared to the original image density 0.7, and moreover, the original image density is 0.3.
This is a condition suitable for recording characters, halftone photographs, etc., where the copy image density is 0.1 or less. Sensitometric curve B is a record of a silver halide photograph or the like with a sensitometric γ of approximately 1.0, where the copy image density (5) changes in proportion to the original image density up to at least 1.1. The conditions are suitable for
すなわち、図示例の静電記録装置においては、記録する
画像の種類が文字や網点写真のような場合は、高帯電電
位、高露光量条件に切換え、記録する画像の種類が銀塩
写真のよう々場合は、低帯電電位、低露光量の条件に切
換えればよい。That is, in the electrostatic recording device shown in the example, when the type of image to be recorded is a text or halftone photograph, the conditions are switched to high charging potential and high exposure amount, and when the type of image to be recorded is a silver halide photograph. In such a case, it is sufficient to switch to the conditions of low charging potential and low exposure amount.
なお、感光体や現像条件等が異なる場合は、それについ
てセンシトメ) IJ−曲線A及びBが得られるよう々
帯電電位及び露光量の条件を求めて、記録する画像の種
類に応じて適当な帯電電位と露光量の組合せ条件に切換
えるようにすればよいことは勿論である。Note that if the photoconductor or development conditions are different, please check the sensitivity accordingly.) Determine the charging potential and exposure amount conditions to obtain IJ-curves A and B, and adjust the charging potential and exposure amount appropriately according to the type of image to be recorded. Of course, it is only necessary to switch to a combination of the potential and the exposure amount.
以上述べたように、本発明の静電記録装置は、記録すべ
き画像の種類に応じて適切なセンシトメトリー曲線を与
える帯電電位並びに露光量の条件に切換えることができ
るから、忠実な再現記録を行うことができると云う優れ
た効果を与える。As described above, the electrostatic recording device of the present invention can switch the charging potential and exposure amount conditions to provide an appropriate sensitometric curve depending on the type of image to be recorded, so that faithful reproduction recording can be achieved. It gives an excellent effect of being able to do the following.
(6)(6)
第1図は感光体表面電位と現像濃度との関係を示すグラ
フ、第2図はセンシトメトリーグラフである。
A・・・高帯電電位、高露光量のセンシトメ) IJ−
曲線、
B・・・低帯電電位、低露光量のセンシトメトリー曲線
。
特許出願人 小西六写真工業株式会社ロシー咽A嵌禦
・1.z
手続補正書
昭和58年y月2日
特許庁長官若彰和夫 殿
1、事件の表示
昭和58年 特 許 願第60905号3、補正をする
者
事件との関係 特許出願人
在りガ寿 東京都新宿区西新宿1丁目26番2号氏 名
(名称) (127)小西六写真工業株式会社6、 補
正により増加する発明の数 なし7、補正の対象
図面の第2図
8、補正の内容
n’u−噸彎g4JM!!
手続補正書
昭和59年6月2日
特許庁長官若杉和夫 殿
1、事件の表示
昭和58年 特 許 願第60905号2゛発明0名称
静電記録装置
3、 補正をする者
事件との関係 特許出願人
(JE”FS 東京都新宿区西新宿1丁目26番2号
氏 名(名称)(127)小西六写真工業株式金社4、
代 理 人 〒160電話556−60906、補正に
より増加する発明の数 0
7、補正の対象
明細書の特許請求の範囲、発明の詳細な説明、図面の簡
単な説明の欄及び図面
8、補正の内容
別紙の通シ
(別紙)
1、%許請求の範囲を下記の通り訂正する。
[川 少くとも帯電、露光、現像の各プロセス手段を
含む静電記録装置であって、再生記録画像の濃度が高い
か、低い(濃度ゼロを含む)かの画像記録を行うのに適
した再生記録系のγ値と連続階調の画像記録を行うのに
適した再生記録系のγ値とを選択できる選択手段を有す
ることを特徴とする静電記録装置。
2、 明細書第6頁第14行と第15行の間に下記を挿
入する。
(1)
[〔実施例〕
さらに、第3図及び第4図を参照して本発明の具体的実
施例を説明する。
第3図は、上述のように感光体の帯電電位や露光条件を
変化させてγ値(原稿の画像濃度に対する記録された画
像濃度のカーブの勾配)を制御する本発明記録装置の制
御系ブロックダイアグラムであシ、第4図は、第3図の
記録装置でそれぞれ文字等の線画原稿と2種類の階調画
原稿に適した帯電条件と露光条件を選択して得られたセ
ンシトメトリー曲線の例を示すグラフである。
第3図の記録装置は、操作者が操作部を操作して操作部
から制御部に入力される原稿台1上の原稿2の画像が線
画か階調画かの情報、あるいは、ホトカプラーの如き検
知器3から制御部に入力される原稿2の画像情報に基い
て、制御部が帯電装置4のグリッド4aに印加するバイ
アス電圧の制御を行う帯電量制御装置E1と露光ランプ
50発光量を制御する光量制御装置F2IQ \
を適当に制御して、それにより装置E1とB2が線画か
階調画かに適当したγ値の得られる帯電量と露光量を与
えるようにする。さらに、制御部は、現像装置7の現像
スリーブ7aに印加するバイアス電圧の制御を行う現像
バイアス制御装置E3も制御して、かぶりなく適当な濃
度の現像が行われるようにしている。々お、6は露光ラ
ンプ5による原稿2の反射光を感光体ドラム8の表面に
投影する光伝送体である。
第4図のAl + Bl + B2は、感光体ドラム8
が表面に負帯電用の有機感光体層を表面に有し、帯電量
制御装置E1が全電流500μAのスコロトロン帯電装
置4のグリッド4aの電位を3段階に切換えて表1の帯
電電位に見るように感光体ドラム8を帯電させ、光量制
御装置E2が露光ランプ5の発光量を3段階に切換えて
表1の露光量に見るように露光を行い、それによって表
1の黒部電位と白部電位に見るような静電潜像が形成さ
れ、その静電潜像を、マグネタイト60部、カーボン4
0部、ポリエステル系樹脂40部から成シ抵抗値が10
Ωcmの磁性トナーから成る一成分現像剤を用いた現像
装置7により、感光体ドラム8と現像スリーブ7aの間
隙0.3m、現像スリーブ7aの左回転の表面速度が感
光体ドラム8の表面速度の約1.1倍、現像スリーブ7
a内の磁石体の右回転速度1000 rpm 。
現像スリーブ7a上に現像剤層を形成する層厚規制ブレ
ードの現像スリーブ7aとの間隙0.4簡、現像スリー
ブ7aには一30Vの一定のバイアス電圧を印加する条
件で現像したセンシトメトリー曲線を示している。
表 1
はっきりした線画と階調画についてはそれぞれA1とB
2の条件を選択し、その中間の階調画についてはB1の
条件を選択したことによって、それぞれ原画の再現性に
優れた画像記録を得ることができた。」
3、 同第7頁第3〜4行の「グラフである。」を「グ
ラフ、第3図は本発明記録装置の例を示す制御系ブロッ
クダイアグラム、第4図は第3図の記録装置で選択され
るセンシトメトリー曲線の例を示すグラフである。」と
訂正する。
4、 同第7頁第8行の「線。」をE線、」と訂正する
。
5、 同第7頁第8行の次に下記を加入する。
[2・・・原稿、3・・・検知器、4・・・帯電装置、
4a・・・グリッド、5・・・露光ランプ、7・・・現
像装置、7a・・・現像スリーブ、El・・・帯電量制
御装置、B2・・・光量制御装置、B3・・・現像バイ
アス制御装置、A、+ + B1 + B2・・・セン
シトメトリー曲線。」6、 図面に別紙第3図と第4図
を追加する。
以 上
(5)
第3図FIG. 1 is a graph showing the relationship between photoreceptor surface potential and development density, and FIG. 2 is a sensitometric graph. A... Sensitome with high charging potential and high exposure amount) IJ-
Curve, B: Sensitometric curve with low charging potential and low exposure amount. Patent applicant: Roku Konishi Photo Industry Co., Ltd. Rosie A. 1. z Procedural Amendment Date: Y/2/1980 Kazuo Wakaaki, Commissioner of the Japan Patent Office 1, Indication of the case, 1983 Patent Application No. 60905 3, Relationship with the person making the amendments Patent applicant's lifespan Tokyo 1-26-2 Nishi-Shinjuku, Shinjuku-ku Name (Name) (127) Konishiroku Photo Industry Co., Ltd. 6 Number of inventions increased by the amendment None 7 Figure 2 of the drawing subject to the amendment 8 Contents of the amendment n 'u-Kanka g4JM! ! Procedural amendment June 2, 1980 Kazuo Wakasugi, Commissioner of the Japan Patent Office 1. Indication of the case 1988 Patent Application No. 60905 2 Invention 0 Title Electrostatic recording device 3 Person making the amendment Relationship to the case Patent Applicant (JE”FS 1-26-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Name) (127) Konishiroku Photo Industry Co., Ltd. Kanesha 4,
Agent 160 Telephone number 556-60906, Number of inventions increased by amendment 0 7, Claims of the specification subject to amendment, Detailed description of the invention, Column for brief description of drawings and Drawing 8, Amendment Attached sheet of contents (attached sheet) 1. The scope of the percentage claim is corrected as follows. [River] An electrostatic recording device that includes at least each process means of charging, exposure, and development, and is suitable for recording images with high or low density (including zero density) of the reproduced recorded image. An electrostatic recording apparatus characterized by having a selection means for selecting a γ value of a recording system and a γ value of a reproducing/recording system suitable for performing continuous tone image recording. 2. Insert the following between lines 14 and 15 on page 6 of the specification. (1) [[Example] Further, a specific example of the present invention will be described with reference to FIGS. 3 and 4. FIG. 3 shows a control system block of the recording apparatus of the present invention, which controls the γ value (the slope of the curve of the recorded image density with respect to the image density of the original) by changing the charging potential of the photoreceptor and the exposure conditions as described above. Figure 4 is a diagram showing sensitometric curves obtained using the recording device shown in Figure 3 by selecting charging conditions and exposure conditions suitable for a line drawing original such as text and two types of gradation drawing originals, respectively. It is a graph showing an example. The recording device shown in FIG. 3 is configured to collect information such as information such as a photocoupler, information on whether the image of the document 2 on the document table 1 is a line drawing or a gradation image, which is input from the operation section to the control section by the operator operating the operation section. Based on the image information of the document 2 input from the detector 3 to the control unit, the control unit controls the charge amount control device E1 that controls the bias voltage applied to the grid 4a of the charging device 4 and the amount of light emitted by the exposure lamp 50. The light amount control device F2IQ \ is appropriately controlled so that the devices E1 and B2 provide a charge amount and an exposure amount to obtain an appropriate γ value for line drawing or gradation drawing. Furthermore, the control section also controls a developing bias control device E3 that controls the bias voltage applied to the developing sleeve 7a of the developing device 7, so that development is performed at an appropriate density without fogging. Reference numeral 6 denotes a light transmitting member that projects light reflected from the original 2 by the exposure lamp 5 onto the surface of the photosensitive drum 8. Al+Bl+B2 in FIG. 4 is the photosensitive drum 8.
has an organic photoreceptor layer for negative charging on its surface, and the charge amount control device E1 switches the potential of the grid 4a of the scorotron charging device 4 with a total current of 500 μA to three levels, as shown in the charging potentials in Table 1. The photoreceptor drum 8 is charged, and the light amount control device E2 switches the amount of light emitted from the exposure lamp 5 into three stages to perform exposure as shown in the exposure amounts in Table 1, thereby achieving the black potential and white potential in Table 1. An electrostatic latent image is formed as shown in
Forming resistance value is 10 from 0 parts and 40 parts of polyester resin.
The developing device 7 uses a one-component developer made of magnetic toner of Ωcm, the gap between the photoreceptor drum 8 and the developing sleeve 7a is 0.3 m, and the surface speed of the developing sleeve 7a when rotating counterclockwise is equal to the surface speed of the photoreceptor drum 8. Approximately 1.1x, developing sleeve 7
The clockwise rotation speed of the magnet body in a is 1000 rpm. Sensitometric curve developed under the conditions that the gap between the layer thickness regulating blade that forms the developer layer on the developing sleeve 7a and the developing sleeve 7a is 0.4 mm, and a constant bias voltage of -30 V is applied to the developing sleeve 7a. It shows. Table 1 A1 and B for clear line drawings and tone drawings, respectively.
By selecting condition No. 2 and selecting condition B1 for intermediate gradation images, it was possible to obtain image recordings with excellent reproducibility of the original images. 3. In the 3rd and 4th lines of page 7, "It is a graph." This is a graph showing an example of a sensitometric curve selected in . 4. On page 7, line 8, "line." is corrected to "E line." 5. Add the following on page 7, line 8: [2... Original, 3... Detector, 4... Charging device,
4a... Grid, 5... Exposure lamp, 7... Developing device, 7a... Developing sleeve, El... Charge amount control device, B2... Light amount control device, B3... Developing bias Control device, A, + + B1 + B2...sensitometric curve. ”6. Add attached figures 3 and 4 to the drawings. Above (5) Figure 3
Claims (1)
記録装置であって、再生記録画像の濃度が高いか、低い
(濃度ゼロを含む)かの画像記録を行うのに適した再生
記録系のγ値と連続階調の画像記録を行うのに適した再
生記録系のγ値とを選択できる選択手段を有することを
特徴とする静電記録装置。An electrostatic recording device that includes at least each process means of charging, exposure, and development, and is suitable for recording images with high or low density (including zero density) of reproduced recorded images. 1. An electrostatic recording apparatus comprising a selection means for selecting a γ value of a reproduction/recording system suitable for performing continuous tone image recording.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58060905A JPS59206843A (en) | 1983-04-08 | 1983-04-08 | Electrostatic recording device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58060905A JPS59206843A (en) | 1983-04-08 | 1983-04-08 | Electrostatic recording device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59206843A true JPS59206843A (en) | 1984-11-22 |
Family
ID=13155837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58060905A Pending JPS59206843A (en) | 1983-04-08 | 1983-04-08 | Electrostatic recording device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59206843A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01156766A (en) * | 1987-12-15 | 1989-06-20 | Canon Inc | Image forming device |
-
1983
- 1983-04-08 JP JP58060905A patent/JPS59206843A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01156766A (en) * | 1987-12-15 | 1989-06-20 | Canon Inc | Image forming device |
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