JPH0210376A - Control method for electrophotographic copying device - Google Patents
Control method for electrophotographic copying deviceInfo
- Publication number
- JPH0210376A JPH0210376A JP63159220A JP15922088A JPH0210376A JP H0210376 A JPH0210376 A JP H0210376A JP 63159220 A JP63159220 A JP 63159220A JP 15922088 A JP15922088 A JP 15922088A JP H0210376 A JPH0210376 A JP H0210376A
- Authority
- JP
- Japan
- Prior art keywords
- image forming
- electrophotographic copying
- copying apparatus
- image
- photosensitive drum
- 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
- 238000000034 method Methods 0.000 title claims description 34
- 108091008695 photoreceptors Proteins 0.000 claims description 20
- 230000003068 static effect Effects 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 claims description 11
- 238000005286 illumination Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 abstract description 2
- 230000005622 photoelectricity Effects 0.000 abstract 1
- 230000008030 elimination Effects 0.000 description 8
- 238000003379 elimination reaction Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 206010047571 Visual impairment Diseases 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Landscapes
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明は電子写真複写装置の制御方法に係り、とくに、
１枚の複写をするために感光体ドラムの少なくとも１回
転以上を使用する電子写真複写装置の制御方法に関する
。[Detailed Description of the Invention] [Technical Field] The present invention relates to a method of controlling an electrophotographic copying device, and particularly,
The present invention relates to a method of controlling an electrophotographic copying apparatus that uses at least one revolution of a photosensitive drum to make one copy.
１枚の複写をするために感光体ドラＪ、の少なく志も１
回転以上を使用する電子写真複写装置、または連続複写
出来る電子写真複写装置において、感光体が不均一に帯
電され且つ光疲労していると、前者の場合には１枚の複
写の中に感光体の１回転目と２回転目に疲労差による濃
度差、残像等が発生する。後者の場合では１枚目と２枚
目以降に濃度差を生ずる。かかる不都合を回避するため
に、従来、感光体を周面に形成した感光体ドラノ、およ
び該感光体ドラムの周面に沿って配設された一様帯電手
段、像露光手段、現像手段、転写手段、クリーニング手
段を備え、前記クリーニング手段の下流側に配設され、
前記−様帯電手段と同極性の帯電器および該帯電器の下
流側に配設された光除電器を有する電子写真複写装置が
知られている（特開昭５７−１８５０７１号公報）。か
かる電子写真複写装置においては均一疲労させるために
、帯電工程に入る前に帯電上同極性の帯電器占光除電器
を配置することにより帯電させ且つ光疲労さセる。この
場合に、さらに他の帯電器を設しノるために、コストの
面で高価となるばかりでなく、帯電器リークによる火災
等の安全性を考慮するとスペース的乙こも制約を受け、
装置の小型化にとって障害となる。In order to make one copy, the number of photoreceptor drums J is at least 1.
In an electrophotographic copying machine that uses more than one rotation, or an electrophotographic copying machine that can perform continuous copying, if the photoreceptor is unevenly charged and suffers from optical fatigue, in the former case, the photoreceptor may Density differences, afterimages, etc. occur between the first and second rotations due to fatigue differences. In the latter case, a difference in density occurs between the first and second sheets. In order to avoid such inconveniences, conventionally, a photoreceptor drum having a photoreceptor formed on its circumferential surface, a uniform charging means, an image exposure means, a developing means, and a transfer means arranged along the circumferential surface of the photoreceptor drum have been used. means, a cleaning means, disposed downstream of the cleaning means,
An electrophotographic copying apparatus is known that has a charger having the same polarity as the -like charging means and an optical charge remover disposed downstream of the charger (Japanese Patent Application Laid-Open No. 185071/1983). In order to achieve uniform fatigue in such an electrophotographic copying apparatus, a charger and a light eliminator of the same polarity are placed above the charging process to charge the apparatus and eliminate optical fatigue before starting the charging process. In this case, it is not only expensive in terms of cost to install another charger, but also space constraints due to safety concerns such as fire caused by charger leakage.
This poses an obstacle to miniaturization of devices.
本発明は、上述した従来装置の不都合に鑑みてなされた
もので、その目的とするところは、複写動作開始前に感
光体を均一に帯電させ目−つ光疲労させて複写の品質を
一定に保つことが出来る電子写真複写装置の制御方法を
桿供することにある。The present invention has been made in view of the above-mentioned disadvantages of the conventional apparatus.The purpose of the present invention is to uniformly charge the photoreceptor before the start of the copying operation, thereby reducing optical fatigue of the eyes and thereby maintaining the quality of the copies. An object of the present invention is to provide a control method for an electrophotographic copying apparatus that can maintain the same quality.
この「１的を達成するために、本発明は、感光体を周面
に形成した感光体ドラム、該感光体ドラＪ・の周面に沿
って配設された帯電装置、像露光装置、現像装置、転写
装置、クリーニング装置、除電装置およびレイース装置
とを備えた電子写真複写装置の制御方法において、画像
形成工程開始前に前記帯電装置と前記イレース装置とを
同時に作動させ、前記感光体ドラムを少なくきも１回転
以−に回転させた後、前記画像形成工程に入ることを特
徴としたものである。In order to achieve this object, the present invention provides a photoreceptor drum having a photoreceptor formed on its circumferential surface, a charging device disposed along the circumferential surface of the photoreceptor drum, an image exposure device, and a developing device. In a method of controlling an electrophotographic copying apparatus including a device, a transfer device, a cleaning device, a static eliminator, and a erase device, the charging device and the erase device are operated simultaneously before the start of an image forming process, and the photosensitive drum is The apparatus is characterized in that the image forming step is started after the image forming apparatus has been rotated at least once.
以下、本発明の一実施例に基づいて具体的に説明する。Hereinafter, a detailed explanation will be given based on one embodiment of the present invention.
第１図は本発明による制御方法を実施する電子写真複写
装置を説明する概略図である。第１図において、１は矢
印方向に回転する感光体ドラム、２は帯電装置、３はイ
レース装置、４は像露光装置、５は現像装置、６は転写
装置（転写チャージャ）、７は転写紙分離ユニット、８
はクリーニング装置、９は除電装置である。FIG. 1 is a schematic diagram illustrating an electrophotographic copying apparatus implementing a control method according to the present invention. In FIG. 1, 1 is a photosensitive drum rotating in the direction of the arrow, 2 is a charging device, 3 is an erase device, 4 is an image exposure device, 5 is a developing device, 6 is a transfer device (transfer charger), and 7 is transfer paper. Separation unit, 8
9 is a cleaning device, and 9 is a static eliminator.
イレース装置３は以下のごとく、最近の複写装置では、
イメージシフト（例えば、ファイル用に余白部を形成す
る機能）とか画像合成（２つの原稿を１つの複写上に形
成させる機能）を可能にするために設けられる光源で、
帯電工程の後に像露光装置４の画像露光光とは別に感光
体電荷を消去するのに用いられ、この光源はイレース光
と呼ばれる。The erase device 3 is as shown below, and in recent copying machines,
A light source provided to enable image shifting (for example, the function of forming margins for files) and image compositing (the function of forming two originals on one copy).
After the charging process, the light source is used to erase the charge on the photoreceptor separately from the image exposure light of the image exposure device 4, and this light source is called erase light.
第１図に示した実施例はこのイレース光の機能を利用し
たもので、複写装置の画像形成工程開始前に帯電装置２
とイレース装置３を作動状態にして感光体ドラｌ、１を
１回転以−Ｌ回転させてから画像形成工程に入るように
する。このように作動させることにより、感光体ドラノ
、１は帯電的にもまた先約にも均一に疲労させられ、均
一な複写を安定して得ることが出来る。The embodiment shown in FIG. 1 utilizes the function of this erase light, and the charging device 2 is
Then, the erase device 3 is put into operation, and the photoreceptor drums 1 and 1 are rotated one or more times -L before starting the image forming process. By operating in this manner, the photoreceptor drum 1 is fatigued uniformly both in terms of charge and in advance, making it possible to stably obtain uniform copies.
また、連続複写中には、帯電装置２は常にオン状態にｊ
−１画像形成を要する部分のみイ！／−スをオフさせれ
ば良い。Also, during continuous copying, the charging device 2 is always on.
-1 Only the parts that require image formation! All you have to do is turn off the /-.
この結果、第１図に示した実施例においては、帯電前に
別の帯電器を設置、Ｊることなく制御することができ、
スペース的にもまたコスト的にも大幅に改善される。As a result, in the embodiment shown in FIG. 1, a separate charger can be installed and controlled before charging.
Significant improvements can be made in terms of space and cost.
次に、第２図および第３図は本発明の方法の他の概念を
適用する電子写真複写装置を説明する概略図である。第
１図と同し装置には同一符号を付して示す第２図および
第３図において、複写装置は感光体ドラム１、帯電装置
２、像露光装置４、現像装置５、転写装置（転写チャー
ジャ）６、転写紙分離ユニット７、クリーニング装置８
、除電装置（除電ランプ）９から構成されている。この
複写装置はさらに除電ランプ９の光を反射部材１０に導
くシャッタ兼反射部材１１を備えている。Next, FIGS. 2 and 3 are schematic diagrams illustrating an electrophotographic copying apparatus to which another concept of the method of the present invention is applied. In FIGS. 2 and 3, the same devices as in FIG. charger) 6, transfer paper separation unit 7, cleaning device 8
, a static eliminator (static eliminator) 9. This copying apparatus further includes a shutter/reflection member 11 that guides the light from the static elimination lamp 9 to a reflection member 10 .
このシャッタ兼反射部材１１は、必要に応じて除電ラン
プ９の光を、帯電工程に影響を与えることなく、反射部
材１０に導く機能を有するもので除電ランプ９との位置
関係により光を反射する機能は必ずしも必要ない。反射
部材ＩＯは除電ランプ９の光を感光体ドラム１に照射さ
せる機能を有する。シャッタ兼反射部材１１は図示して
ないソレノイド等により容易に駆動することが出来る。This shutter/reflection member 11 has the function of guiding the light of the static elimination lamp 9 to the reflection member 10 without affecting the charging process as necessary, and reflects the light depending on the positional relationship with the static elimination lamp 9. Functionality is not necessarily required. The reflecting member IO has a function of irradiating the photosensitive drum 1 with light from the static elimination lamp 9. The shutter/reflection member 11 can be easily driven by a solenoid or the like (not shown).
かかる構成において本発明の制御方法は、画像形成工程
開始前に、除電ランプ９、シャッタ駆動手段および帯電
装置２を作動状態にする。シャッタ駆動手段は作動状態
のときに除電ランプ９の光を反射部材１０に導く。次に
、感光体ドラム１を１回転以上回転させてから画像形成
工程に入るようにする。これにより感光体ドラム１を帯
電的にも光的にも均一に疲労させられ、均一な複写を安
定して得ることが出来る。In this configuration, the control method of the present invention puts the static elimination lamp 9, the shutter drive means, and the charging device 2 into operation before the start of the image forming process. The shutter driving means guides the light from the static elimination lamp 9 to the reflecting member 10 when in the operating state. Next, the photosensitive drum 1 is rotated one rotation or more before starting the image forming process. This allows the photosensitive drum 1 to be uniformly fatigued both electrically and optically, making it possible to stably obtain uniform copies.
連続複写の場合には、除電ランプ９、シャッタ駆動手段
および帯電装置２を作動させ、画像形成を要する部分の
みシャッタ駆動手段を不作動にすれば良い。In the case of continuous copying, the static elimination lamp 9, the shutter driving means, and the charging device 2 may be activated, and the shutter driving means may be deactivated only in the portion where image formation is required.
この結果、この概念においても同様にコストおよびスペ
ースの面で改善される。This results in cost and space improvements in this concept as well.
第４図は本発明方法の他の概念を適用する電子写真複写
装置を説明する概略図である。第４図において、第１図
と同じ装置は同一符号を付して示され、１は感光体ドラ
ム、２は帯電装置、４は露光装置（原稿照明用スキャナ
）、５は現像装置、６は転写装置（転写チャージャ）、
７は転写紙分離ユニット、８はクリーニング装置、９は
除電装置である。この複写装置の構成においてはさらに
複写用原稿１２、コンタクトガラス１３、反射板１４お
よび原稿照明用光源１５が示しである。反射板１４は原
稿照明用スキャナの停止位置において原稿の外方に位置
し且つ通常は白色塗装した板金等によって形成される。FIG. 4 is a schematic diagram illustrating an electrophotographic copying apparatus to which another concept of the method of the present invention is applied. In FIG. 4, the same devices as in FIG. 1 are denoted by the same reference numerals, and 1 is a photosensitive drum, 2 is a charging device, 4 is an exposure device (scanner for document illumination), 5 is a developing device, and 6 is a Transfer device (transfer charger),
7 is a transfer paper separation unit, 8 is a cleaning device, and 9 is a static eliminator. The configuration of this copying apparatus further includes a copying original 12, a contact glass 13, a reflecting plate 14, and a light source 15 for illuminating the original. The reflecting plate 14 is located outside the original at the stop position of the scanner for illuminating the original, and is usually formed of a white-painted sheet metal or the like.
この反射Ｆｉ１４によりスキャナの停止位置において照
明用光源１５が点灯されれば、光はこの反射板１４で反
射し、光学系を介して感光体ドラム１に通常の原稿の地
肌部と同等の光を照射出来るようになされている。When the illumination light source 15 is turned on at the stop position of the scanner by this reflection Fi 14, the light is reflected by the reflection plate 14 and emits light equivalent to the background part of a normal document onto the photosensitive drum 1 via the optical system. It is designed so that it can be irradiated.
第４図の複写装置において、本発明による制御は反射板
１４を利用して行われる。すなわち、この反射板１４に
より帯電装置２および照明用光源１５は、画像形成工程
開始前に作動状態に持ち来たされる。次いで、スキャナ
を停止位置に固定した状態で感光体ドラム１を少なくと
も１回転以上回転させてから画像形成工程に入るように
する。In the copying apparatus shown in FIG. 4, control according to the present invention is performed using a reflector plate 14. In the copying apparatus shown in FIG. That is, the charging device 2 and the illumination light source 15 are brought into operation by the reflecting plate 14 before the start of the image forming process. Next, with the scanner fixed at the stop position, the photosensitive drum 1 is rotated at least one revolution before starting the image forming process.
これにより感光体ドラム１はチャージ的にもまた光的に
も均一に疲労させられ且つ均一な複写を安定して得るこ
とが出来る。As a result, the photosensitive drum 1 is uniformly fatigued both in terms of charge and light, and uniform copies can be stably obtained.
この結果、帯電前に別の帯電器を設けることな（スペー
ス的にもコスト的にも大幅に改善される。As a result, there is no need to provide a separate charger before charging (a significant improvement in terms of space and cost).
また、連続複写中は、帯電装置２および照明用光源（照
明ランプ）１５は常に作動状態にしておき、画像形成を
要する部分のみスキャナを駆動させれば良い。但し、こ
の方法では、多量の発熱を伴う照明ランプ（例えば、ハ
ロゲンランプ）を使用するとき、反射板付近をファン等
によって強制的に冷却する必要がある。Further, during continuous copying, the charging device 2 and the illumination light source (illumination lamp) 15 may be kept in operation at all times, and the scanner may be driven only in the portion where image formation is required. However, with this method, when using a lighting lamp that generates a large amount of heat (for example, a halogen lamp), it is necessary to forcibly cool the area around the reflector using a fan or the like.
叙上のごとく、本発明によれば、画像形成工程開始前に
、帯電装置を作動させ、これと同時に、それぞれイレー
ス装置、または除電ランプ、シャッタ駆動手段、または
照明用光源を作動させ、感光体ドラムを少なくとも１回
転以上回転させた後に画像形成工程に入るようにしたの
で、複写動作開始前に感光体ドラムを均一に帯電し且つ
光疲労させて複写の品質を一定に保つことができ、感光
体ドラム上に不必要な帯電部分が形成されないのでトナ
ーの消費量およびクリーニング装置への負荷を軽減出来
るという効果を奏する電子写真複写装置の制御方法を提
供することが出来る。As described above, according to the present invention, before the start of the image forming process, the charging device is activated, and at the same time, the erasing device, the static elimination lamp, the shutter driving means, or the illumination light source is activated, and the photoreceptor is charged. Since the image forming process is started after the drum has rotated at least one revolution, the photosensitive drum can be uniformly charged and optically fatigued before the copying operation starts, and the quality of copying can be kept constant. It is possible to provide a control method for an electrophotographic copying apparatus that has the effect of reducing toner consumption and the load on a cleaning device since no unnecessary charged portions are formed on the body drum.
第１図は本発明による制御方法を適用する電子写真複写
装置の構成を示す概略図、第２図および第３図は本発明
による制御方法を通用する電子カニ真複写装置の他の構
成を示す概略図、第４図は本発明による制御方法を適用
する電子写真複写装置のさらに他の構成を示す概略図で
ある。
１・・・感光体ドラム、２・・・帯電装置、３・・・イ
レース装置、４・・・露光装置（スキャナ）、５・・・
現像装置、６・・・転写装置、８・・・クリーニング装
置、９・・・除電装置、１０・・・反射部材、１１・・
・シャッタ兼反射部十、４’、１５・・・照明用光源。FIG. 1 is a schematic diagram showing the configuration of an electrophotographic copying apparatus to which the control method according to the present invention is applied, and FIGS. 2 and 3 show other configurations of the electronic crab copying apparatus to which the control method according to the present invention is applied. FIG. 4 is a schematic diagram showing still another configuration of an electrophotographic copying apparatus to which the control method according to the present invention is applied. DESCRIPTION OF SYMBOLS 1... Photosensitive drum, 2... Charging device, 3... Erase device, 4... Exposure device (scanner), 5...
Developing device, 6... Transfer device, 8... Cleaning device, 9... Static eliminator, 10... Reflective member, 11...
・Shutter/reflector 10, 4', 15...Light source for illumination.
Claims (3)
ドラムの周面に沿つて配設された帯電装置、像露光装置
、現像装置、転写装置、クリーニング装置、除電装置お
よびレイース装置とを備えた電子写真複写装置の制御方
法において、画像形成工程開始前に前記帯電装置と前記
イレース装置とを同時に作動させ、前記感光体ドラムを
少なくとも１回転以上回転させた後、前記画像形成工程
に入ることを特徴とする電子写真複写装置の制御方法。(1) A photoconductor drum having a photoconductor formed on its circumferential surface, a charging device, an image exposure device, a developing device, a transfer device, a cleaning device, a static eliminator, and a lace device disposed along the circumferential surface of the photoconductor drum. In the method for controlling an electrophotographic copying apparatus, the charging device and the erasing device are simultaneously operated before the start of the image forming step, and after the photosensitive drum is rotated at least one revolution, the image forming step is performed. 1. A method of controlling an electrophotographic copying apparatus, comprising:
ドラムの周面に沿つて配設された帯電装置、像露光装置
、現像装置、転写装置、クリーニング装置、除電装置、
シャッタ部材、シャッタ駆動手段、および反射部材を備
えた電子写真複写装置の制御方法において、画像形成工
程開始前に前記除電装置、前記シャッタ駆動手段および
前記帯電装置を作動状態にし、前記感光体ドラムを少な
くとも１回転以上回転させた後、前記画像形成工程に入
ることを特徴とした電子写真複写装置の制御方法。(2) A photoreceptor drum having a photoreceptor formed on its circumferential surface, a charging device, an image exposure device, a developing device, a transfer device, a cleaning device, a static eliminating device disposed along the circumferential surface of the photoreceptor drum,
In a method for controlling an electrophotographic copying apparatus including a shutter member, a shutter driving means, and a reflecting member, the static eliminator, the shutter driving means, and the charging device are activated before the start of an image forming process, and the photosensitive drum is activated. A method for controlling an electrophotographic copying apparatus, characterized in that the image forming step is started after rotating at least one rotation.
ドラムの周面に沿つて配設された帯電装置、像露光装置
、現像装置、転写装置、クリーニング装置、除電装置、
照明用光源、原稿照明用スキャナ、および原稿置台の下
側に設けられ且つ原稿照明用光を反射する反射部材を備
えた電子写真複写装置の制御方法において、画像形成工
程開始前に前記帯電装置を作動させ、前記原稿照明用ス
キャナを不動のままで前記照明用光源を点灯させ、前記
感光体ドラムを少なくとも１回転以上回転させた後、前
記画像形成工程に入ることを特徴とする電子写真複写装
置の制御方法。(3) A photoreceptor drum having a photoreceptor formed on its circumferential surface, a charging device, an image exposure device, a developing device, a transfer device, a cleaning device, a static eliminating device disposed along the circumferential surface of the photoreceptor drum,
In a method for controlling an electrophotographic copying apparatus including a light source for illumination, a scanner for illuminating a document, and a reflecting member provided below a document table and reflecting light for illuminating the document, the charging device is activated before an image forming process is started. The electrophotographic copying apparatus is characterized in that the electrophotographic copying apparatus enters the image forming step after being activated, the illumination light source is turned on while the document illumination scanner remains stationary, and the photosensitive drum is rotated at least one revolution. control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63159220A JPH0210376A (en) | 1988-06-29 | 1988-06-29 | Control method for electrophotographic copying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63159220A JPH0210376A (en) | 1988-06-29 | 1988-06-29 | Control method for electrophotographic copying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0210376A true JPH0210376A (en) | 1990-01-16 |
Family
ID=15688959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63159220A Pending JPH0210376A (en) | 1988-06-29 | 1988-06-29 | Control method for electrophotographic copying device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0210376A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05158294A (en) * | 1991-12-04 | 1993-06-25 | Nec Niigata Ltd | Electrophotographic printer |
| EP0691781A3 (en) * | 1994-07-07 | 1997-01-29 | Canon Kk | Copying apparatus capable of changing original feed order |
-
1988
- 1988-06-29 JP JP63159220A patent/JPH0210376A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05158294A (en) * | 1991-12-04 | 1993-06-25 | Nec Niigata Ltd | Electrophotographic printer |
| EP0691781A3 (en) * | 1994-07-07 | 1997-01-29 | Canon Kk | Copying apparatus capable of changing original feed order |
| US6181894B1 (en) | 1994-07-07 | 2001-01-30 | Canon Kabushiki Kaisha | Copying apparatus capable of changing original feed order |
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