JPH0535154A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPH0535154A JPH0535154A JP18879091A JP18879091A JPH0535154A JP H0535154 A JPH0535154 A JP H0535154A JP 18879091 A JP18879091 A JP 18879091A JP 18879091 A JP18879091 A JP 18879091A JP H0535154 A JPH0535154 A JP H0535154A
- Authority
- JP
- Japan
- Prior art keywords
- latent image
- optical system
- toner
- image carrier
- image forming
- 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
Landscapes
- Cleaning In Electrography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、複写機、プリンタ
ー、ファクシミリ等に用いられる電子写真方式の画像形
成装置に関し、特に、露光部に付着したトナーの除去機
構に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic image forming apparatus used in copying machines, printers, facsimiles and the like, and more particularly to a mechanism for removing toner adhering to an exposed portion.
【０００２】[0002]
【従来の技術】従来より、電子写真方式の画像形成装置
の概略構成は、図７に示すように、潜像担持体１の周囲
に近接して、帯電器１１、結像レンズ１２、現像装置１
３、転写紙搬送部１４、転写部１５、分離部１６、クリ
ーニング装置１７、除電ランプ１８等が配置されてお
り、その画像形成プロセスは、帯電器１１により潜像担
持体１の表面部が帯電され、走査光束１９により結像レ
ンズ１２を介して潜像担持体１上に露光が行なわれて静
電潜像が形成され、現像装置１３により静電潜像にトナ
ーが付着されて現像が行なわれた後、転写紙搬送部１４
で搬送された転写紙に転写部１５によりトナー画像が転
写され、分離部１４で転写紙と潜像担持体１が分離され
る。その後、トナー画像が形成された部分がクリーニン
グ装置１７により、その残留トナーが除去され、除電ラ
ンプ１８により帯電されていた電荷が除去されて、再び
帯電器１１による画像形成プロセスの初めの処理に戻
る。そして、該画像形成プロセスが繰り返される。2. Description of the Related Art Conventionally, as shown in FIG. 7, a schematic structure of an electrophotographic image forming apparatus has a charger 11, an imaging lens 12, and a developing device in proximity to the periphery of a latent image carrier 1. 1
3, a transfer paper transport unit 14, a transfer unit 15, a separation unit 16, a cleaning device 17, a charge eliminating lamp 18 and the like are arranged. In the image forming process, the surface of the latent image carrier 1 is charged by the charger 11. Then, the latent image carrier 1 is exposed by the scanning light beam 19 through the imaging lens 12 to form an electrostatic latent image, and the developing device 13 attaches toner to the electrostatic latent image to develop the latent image. Transfer sheet transfer unit 14
The toner image is transferred by the transfer unit 15 to the transfer paper conveyed in step 1, and the transfer paper and the latent image carrier 1 are separated by the separation unit 14. After that, the cleaning device 17 removes the residual toner on the portion on which the toner image is formed, removes the electric charge charged by the discharge lamp 18, and returns to the initial processing of the image forming process by the charger 11. . Then, the image forming process is repeated.
【０００３】この画像形成プロセスににおいて、結像レ
ンズ１２と現像装置１３とが比較的近接して配置されて
いるため、現像装置１３から飛び散ったりしたトナー等
が、帯電器１１や結像レンズ１２等を異物による汚染か
ら保護するためのカバー（図示しない）に付着して露光
のための光を遮り、潜像担持体１上の静電潜像の形成に
悪影響を及ぼすという問題点があった。In this image forming process, since the image forming lens 12 and the developing device 13 are arranged relatively close to each other, toner or the like scattered from the developing device 13 is charged by the charger 11 or the image forming lens 12. And the like are attached to a cover (not shown) for protecting them from contamination by foreign matter and block light for exposure, which adversely affects formation of an electrostatic latent image on the latent image carrier 1. .
【０００４】そこで、例えば、特開昭５７−１４６２８
２号公報においては、図８に示すように、レンズ（又は
光学系カバー）２０面を清掃するためのクリーニング部
材２１を支持するクリーニング部材支持体２２に設けら
れている取っ手部２２ａを矢印の方向へ引くことによ
り、レンズ２０面に接触しているクリーニング部材２１
が接触状態を保ったまま該レンズ２０面を移動して、付
着しているトナー等を除去する画像形成装置が開示され
ている。Therefore, for example, Japanese Patent Laid-Open No. 57-14628.
In Japanese Unexamined Patent Publication No. 2 (1994), as shown in FIG. 8, a handle portion 22a provided on a cleaning member support 22 that supports a cleaning member 21 for cleaning the surface of a lens (or an optical system cover) 20 is arranged in a direction of an arrow. By pulling the cleaning member 21 in contact with the surface of the lens 20.
There is disclosed an image forming apparatus that moves the surface of the lens 20 while keeping the contact state, and removes the adhered toner and the like.
【０００５】また、特開昭６０−４９５６０号公報にお
いては、磁性トナーを用いる複写機において、露光光路
の近傍に磁石を設置することにより、トナーが該磁石に
吸着されるようにする方法、また、実開平２−１１３７
４６公報においては、結像レンズの防塵ガラス（光学系
カバー）の表面に１０10Ω以下の導電性物質から成る被
覆部を形成し、該被覆部を電気的にアースしてトナー等
の付着を防止する方法が開示されている。さらに、露光
光学系の部分に空気流を発生させて、浮遊しているトナ
ーが該光学系に付着しないように方法等が提案されてい
る。Further, in Japanese Patent Application Laid-Open No. 60-49560, a method of installing a magnet in the vicinity of an exposure optical path in a copying machine using magnetic toner so that the toner is attracted to the magnet, , Actual Kaihei 2-1137
In Japanese Patent Laid-Open No. 46-46, a coating portion made of a conductive material having a resistance of 10 10 Ω or less is formed on the surface of the dust-proof glass (optical system cover) of the imaging lens, and the coating portion is electrically grounded to prevent the adhesion of toner or the like. A method of prevention is disclosed. Further, a method and the like have been proposed in which an air flow is generated in the exposure optical system so that the floating toner does not adhere to the optical system.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記従
来の画像形成装置においては、クリーニング部材２１に
よるクリーニングの都度、複写機本体を開閉する手間が
かかったり、磁石を用いた場合は、浮遊しているトナー
を完全に除去することができなかったり、空気流を利用
した方法では露光光学系に付着してしまったトナーは除
去できずに残ってしまう等の問題点があった。そこで、
この発明は上述した従来の問題点を解消して、露光光学
系に付着したトナー等を複写機本体の開閉等を行なうこ
となく、確実に除去することのできる画像形成装置を提
供することを課題としている。However, in the above-mentioned conventional image forming apparatus, it takes time to open and close the main body of the copying machine every time cleaning is performed by the cleaning member 21, or if a magnet is used, it floats. There are problems that the toner cannot be completely removed, and that the toner adhered to the exposure optical system cannot be removed by the method using the air flow and remains. Therefore,
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional problems and to provide an image forming apparatus capable of surely removing toner and the like attached to an exposure optical system without opening and closing the body of a copying machine. I am trying.
【０００７】[0007]
【課題を解決するための手段】この発明の要旨とすると
ころは、請求項１においては、露光光学系を用いて潜像
担持体上に静電潜像を形成し、現像装置によって該静電
潜像を現像する電子写真方式の画像形成装置において、
前記露光光学系の最も下流側にある光学系最下流部材の
下流側表面には、電気伝導性を有する伝導層が形成され
ており、該伝導層に少なくとも交流電圧を印加すること
により、該伝導層に付着したトナーを除去することにあ
る。また、請求項２においては、請求項１記載の画像形
成装置において、前記潜像担持体上には該潜像担持体の
回転方向に順次、帯電部と非帯電部が現われるような所
定の潜像パターンに応じたタイミングで前記光学系最下
流部材の伝導層に少なくとも交流電圧を印加することに
より、該伝導層に付着したトナーを潜像パターンに付着
させることにある。According to a first aspect of the present invention, an exposure optical system is used to form an electrostatic latent image on a latent image carrier, and the electrostatic latent image is developed by a developing device. In an electrophotographic image forming apparatus that develops a latent image,
A conductive layer having electrical conductivity is formed on the downstream surface of the most downstream member of the optical system at the most downstream side of the exposure optical system, and the conductive layer is formed by applying at least an alternating voltage to the conductive layer. The purpose is to remove the toner adhering to the layer. According to a second aspect of the present invention, in the image forming apparatus according to the first aspect, the latent image carrier has a predetermined latent area in which a charged portion and a non-charged portion appear in the rotational direction of the latent image carrier. The toner attached to the conductive layer is attached to the latent image pattern by applying at least an AC voltage to the conductive layer of the most downstream member of the optical system at a timing according to the image pattern.
【０００８】[0008]
【作用】したがって、請求項１では、光学系最下流部材
の表面に伝導層が形成されているので、電圧を印加する
ことにより、該光学系最下流部材に付着したトナーがパ
ウダークラウド状態にされ、空気流等により、このトナ
ーを除去する。請求項２では、光学系最下流部材に、潜
像パターンに応じたタイミングで電圧を印加することに
より、付着したトナーをパウダークラウド状態にして潜
像パターンに付着させ、画像形成に影響を与えることな
く、効率的にトナーを除去する。Therefore, in claim 1, since the conductive layer is formed on the surface of the most downstream member of the optical system, the toner adhered to the most downstream member of the optical system is made into a powder cloud state by applying a voltage. The toner is removed by air flow or the like. According to a second aspect of the present invention, a voltage is applied to the most downstream member of the optical system at a timing according to the latent image pattern so that the adhered toner is made into a powder cloud state and adheres to the latent image pattern, thereby affecting image formation. No, it efficiently removes toner.
【０００９】請求項３では、光学系最下流部材を潜像担
持体に近接させることにより、トナー除去効果を高める
ことができる。請求項４では、トナー除去時に現像装置
を潜像担持体から退避させることにより、現像装置の現
像部に、除去したトナーが混じるのを防止する。請求項
５では、光学系最下流部材にトナーが付着して画像が劣
化した場合に、任意にモードスイッチを押すことによ
り、随時付着したトナーを除去することができるもので
ある。In the third aspect, the toner removing effect can be enhanced by bringing the most downstream member of the optical system close to the latent image carrier. According to the present invention, the developing device is retracted from the latent image carrier at the time of removing the toner to prevent the removed toner from mixing with the developing portion of the developing device. According to the fifth aspect of the present invention, when toner adheres to the most downstream member of the optical system and the image deteriorates, the adhered toner can be removed at any time by arbitrarily pressing the mode switch.
【００１０】[0010]
【実施例】以下、この発明の実施例を図面を参照して説
明する。先ず、図１（ａ）及び（ｂ）（図１のＡＡ’断
面）に示す第１の実施例においては、露光光学系の最下
流部材２の潜像担持体１（１ａは感光層）側の面にはＳ
ｎＯ2等の電気導電性及び光の透過性の良い物質がコー
ティングされた伝導層であるコーティング部３が形成さ
れている。この構成において、コーティング部３に交流
電源４より交流電圧を印加することにより、コーティン
グ部３に付着したトナーをパウダークラウド状態Ｂに
し、そこへ送風手段５によって空気流を作ることによ
り、トナーを除去する。尚、この実施例のようにコーテ
ィングではなく電気伝導性フィルムを最下流部材２の表
面に貼り付けても良い。Embodiments of the present invention will be described below with reference to the drawings. First, in the first embodiment shown in FIGS. 1A and 1B (section AA ′ in FIG. 1), the latent image carrier 1 (1a is a photosensitive layer) side of the most downstream member 2 of the exposure optical system. On the side of S
A coating portion 3 which is a conductive layer coated with a substance having good electrical conductivity and light transmission such as nO 2 is formed. In this configuration, by applying an AC voltage from the AC power source 4 to the coating unit 3, the toner adhering to the coating unit 3 is brought into a powder cloud state B, and an air flow is created by the air blowing unit 5 to remove the toner. To do. An electrically conductive film may be attached to the surface of the most downstream member 2 instead of coating as in this embodiment.
【００１１】次に、第２の実施例を図２及び図３等を参
照して説明する。図２に示すように、潜像担持体１の潜
像形成部１ａが、光学系最下流部材２の位置に来た時
に、光学系最下流部材２に交流及び直流電圧を印加する
ことにより、光学系最下流部材２に付着したトナーをパ
ウダークラウド状態にし、このトナーを潜像形成部１ａ
に付着させる。例えば、潜像担持体１の表面をマイナス
に帯電してネガ／ポジ現像を行なう画像形成装置であれ
ば、潜像担持体１に帯電を行なわず、光学系最下流部材
２に適当な大きさのマイナス直流電圧と適当な大きさの
周波数を持つ交流電圧を印加することにより、光学系最
下流部材２に付着したトナーを潜像担持体１に付着させ
ることができる。Next, a second embodiment will be described with reference to FIG. 2 and FIG. As shown in FIG. 2, when the latent image forming portion 1a of the latent image carrier 1 comes to the position of the most downstream member 2 of the optical system, by applying AC and DC voltages to the most downstream member 2 of the optical system, The toner adhering to the most downstream member 2 of the optical system is made into a powder cloud state, and this toner is transferred to the latent image forming section 1a.
To adhere to. For example, in the case of an image forming apparatus that negatively charges the surface of the latent image carrier 1 to perform negative / positive development, the latent image carrier 1 is not charged, and the optical system most downstream member 2 has an appropriate size. By applying a negative DC voltage and an AC voltage having a frequency of an appropriate magnitude, the toner attached to the most downstream member 2 of the optical system can be attached to the latent image carrier 1.
【００１２】また、図３に示すように、潜像担持体１上
の帯電部１ｂ（潜像形成可能部分）と未帯電部１ｃとを
ストライプ状に交互に形成し、このパターンに対応し
て、図４に示すように、光学系最下流部材２に印加する
直流電圧の値を変化させることにより、光学系最下流部
材２に付着したトナーをゆさぶり、より効率的にトナー
を除去することができる。但し、同図において、ａは潜
像担持体１の未帯電部１ｃの電位、ｂは同じく帯電部１
ｂの電位、ｃは光学系最下流部材２に印加する直流電圧
の値、Ｃは上記部材２の部分に未帯電部１ｃが来ている
時、Ｄは上記部材２の部分に帯電部１ｂが来ている時を
それぞれ示す。これにより除去されたトナーは潜像担持
体１に付着してクリーニング装置１７まで運ばれる。Further, as shown in FIG. 3, charged portions 1b (latent image-formable portions) and uncharged portions 1c on the latent image carrier 1 are alternately formed in stripes, corresponding to this pattern. As shown in FIG. 4, by changing the value of the DC voltage applied to the most downstream member 2 of the optical system, the toner adhering to the most downstream member 2 of the optical system can be shaken and the toner can be removed more efficiently. it can. In the figure, a is the potential of the uncharged portion 1c of the latent image carrier 1 and b is the charged portion 1c.
b is the potential, c is the value of the DC voltage applied to the most downstream member 2 of the optical system, C is the uncharged portion 1c in the member 2, and D is the charged portion 1b in the member 2. I will show you each time. The toner thus removed adheres to the latent image carrier 1 and is carried to the cleaning device 17.
【００１３】また、光学系最下流部材２に付着している
トナーの除去効率を良くする（トナーを潜像担持体１の
静電潜層に付着し易くする）ためには、光学系最下流部
材２と潜像担持体１との距離を小さくすることが必要で
ある。そこで、第３の実施例として、図５に示すよう
な、光学系最下流部材２を移動可とする部材移動手段の
構成を示す。同図（ａ），（ｂ）において、光学系最下
流部材２は支持部材６の先端部に固定されており、支持
部材６は複写機本体側に一端を固定されたコイルスプリ
ング７により、複写機本体側に付勢されており、且つ、
支持部材６の後端部６ａは、複写機本体側に形成された
ソレノイドコイル８の芯部となるように配置されてい
る。Further, in order to improve the removal efficiency of the toner adhering to the most downstream member 2 of the optical system (to facilitate the attachment of the toner to the electrostatic latent layer of the latent image carrier 1), the most downstream member of the optical system is used. It is necessary to reduce the distance between the member 2 and the latent image carrier 1. Therefore, as a third embodiment, there will be shown a structure of a member moving means for moving the most downstream member 2 of the optical system as shown in FIG. 1A and 1B, the optical system most downstream member 2 is fixed to the tip of a supporting member 6, and the supporting member 6 is copied by a coil spring 7 whose one end is fixed to the main body of the copying machine. It is urged toward the machine body side, and
The rear end portion 6a of the support member 6 is arranged so as to be a core portion of the solenoid coil 8 formed on the copying machine main body side.
【００１４】この構成において、通常の画像形成時には
同図（ａ）に示すように、ソレノイドコイル８には電圧
が印加されていない状態で、支持部材６はコイルスプリ
ング７の付勢力により複写機本体側に引き付けられてお
り、光学系最下流部材２は潜像担持体１から比較的離れ
ている。そして、光学系最下流部材２への電圧印加時、
即ち付着トナーの除去時にはソレノイドコイル８へ電圧
を印加することにより、ソレノイドコイル８の電磁力が
コイルスプリング７の付勢力に打ち勝って支持部材６を
矢印Ｅ方向に押し出し、光学系最下流部材２を潜像担持
体１の表面へ接近させる。この光学系最下流部材２に電
圧を印加する（付着トナーを除去する）タイミングとし
ては、画像形成に支障をきたさないために、複写機本体
の電源を入れた時や、所定枚数プリントした後等が考え
られる。In this structure, when a normal image is formed, as shown in FIG. 3A, the support member 6 is urged by the coil spring 7 so that the solenoid coil 8 is not energized. The optical system most downstream member 2 is relatively distant from the latent image carrier 1. When a voltage is applied to the most downstream member 2 of the optical system,
That is, when the adhered toner is removed, by applying a voltage to the solenoid coil 8, the electromagnetic force of the solenoid coil 8 overcomes the biasing force of the coil spring 7 and pushes the supporting member 6 in the direction of arrow E, so that the most downstream member 2 of the optical system is moved. The surface of the latent image carrier 1 is approached. The timing for applying a voltage to the downstream member 2 of the optical system (removing the adhered toner) is, for example, when the power of the copying machine main body is turned on or after printing a predetermined number of sheets in order not to hinder image formation. Can be considered.
【００１５】さらに、光学系最下流部材２に付着したト
ナーを除去して潜像担持体１の表面に付着させた場合、
それが現像装置１３まで来た時に、その現像部に付い
て、新しいトナーと混色してしまわないように、図６に
示すように、該光学系最下流部材２に電圧が印加される
時、現像装置１３が点Ｆを中心に矢印Ｇ方向に回転し
て、潜像担持体１から退避する構成（現像部退避手段）
とすることもできる。Further, when the toner attached to the most downstream member 2 of the optical system is removed and attached to the surface of the latent image carrier 1,
When a voltage is applied to the most downstream member 2 of the optical system, as shown in FIG. 6, so that when the toner reaches the developing device 13, the developing portion is not mixed with new toner and the color is mixed, A configuration in which the developing device 13 rotates in the direction of arrow G about the point F and retracts from the latent image carrier 1 (developing section retracting means).
Can also be
【００１６】[0016]
【発明の効果】以上説明したように、請求項１によれ
ば、トナーの付着した光学系最下流部材の表面に電気導
伝性を持たせた交流電圧を印加し、付着したトナーをパ
ウダークラウド状態にして空気流等によりこのトナーを
除去するので、従来、空気流だけでは充分に除去できな
かったトナーを確実に除去することができる。また、請
求項２によれば、トナーを潜像担持体の潜像パターンに
付着させてクリーニング装置まで運ばせ、しかも該潜像
パターンに応じたタイミングで光学系最下流部材に電圧
が印加されるので、該光学系最下流部材から除去したト
ナーで複写機内が汚れるのを防止することができ、画像
形成を妨げることなくトナーを効率的に除去することが
でき、常に良好な画像を得ることができる。As described above, according to the first aspect of the present invention, an AC voltage having electric conductivity is applied to the surface of the most downstream member of the optical system to which the toner adheres, and the adhered toner is powder clouded. Since the toner is removed by the air flow in the state, it is possible to surely remove the toner which could not be sufficiently removed by the air flow in the past. Further, according to claim 2, the toner is attached to the latent image pattern of the latent image carrier and conveyed to the cleaning device, and a voltage is applied to the most downstream member of the optical system at a timing according to the latent image pattern. Therefore, it is possible to prevent the inside of the copying machine from being soiled by the toner removed from the most downstream member of the optical system, and it is possible to efficiently remove the toner without hindering image formation, and always obtain a good image. it can.
【００１７】また、請求項３によれば、光学系最下流部
材を潜像担持体に近接させるので、付着したトナーを一
層効率的に除去することができる。また、請求項４によ
れば、トナー除去時に現像装置が潜像担持体から退避す
るので、潜像パターンに付着させたゴミや、質が劣化し
ている可能性のあるトナーが現像装置（の現像部）に付
いて新しいトナーと混じり、画像品質が劣化するのを防
止することができる。さらに、請求項５によれば、任意
にトナー除去を行なうためのモードスイッチを設けてい
るので、何らかのアクシデントによって光学系最下流部
材にトナーが付着して画像が乱れた場合に、該モードス
イッチを利用者が押すことにより、トナーを随時除去し
て良好な画像を得ることができるものである。Further, according to the third aspect, since the most downstream member of the optical system is brought close to the latent image carrier, the adhered toner can be removed more efficiently. Further, according to the fourth aspect, since the developing device retracts from the latent image carrier when the toner is removed, dust attached to the latent image pattern and toner that may be deteriorated in quality are (developed). It is possible to prevent the image quality from being deteriorated by being mixed with new toner on the developing section). Further, according to the fifth aspect, since the mode switch for arbitrarily removing the toner is provided, when the toner adheres to the most downstream member of the optical system due to some accident and the image is disturbed, the mode switch is operated. When the user presses the toner, the toner can be removed at any time to obtain a good image.
【図１】この発明の第１の実施例を示す露光部の概略構
成図である。FIG. 1 is a schematic configuration diagram of an exposure unit showing a first embodiment of the present invention.
【図２】この発明の第２の実施例を示す画像形成装置の
概略構成図である。FIG. 2 is a schematic configuration diagram of an image forming apparatus showing a second embodiment of the present invention.
【図３】第２の実施例における潜像パターンの実施例を
示す潜像担持体の斜視図である。FIG. 3 is a perspective view of a latent image carrier showing an example of a latent image pattern in the second example.
【図４】第２の実施例における電圧印加タイミングを示
すタイムチャートである。FIG. 4 is a time chart showing voltage application timing in the second embodiment.
【図５】図（ａ），（ｂ）は第３の実施例を示す露光部
の概略構成図である。5A and 5B are schematic configuration diagrams of an exposure unit showing a third embodiment.
【図６】現像装置の移動を示す画像形成装置の概略構成
図である。FIG. 6 is a schematic configuration diagram of an image forming apparatus showing movement of a developing device.
【図７】従来の画像形成装置を示す概略構成図である。FIG. 7 is a schematic configuration diagram showing a conventional image forming apparatus.
【図８】従来の露光部野トナー除去の仕組を示す説明図
である。FIG. 8 is an explanatory diagram showing a conventional mechanism for removing toner from an exposed area.
１ 潜像担持体 １ｂ，１ｃ 潜像パターン ２ 光学系最下流部材 ３ 伝導層 １３ 現像装置 1 Latent image carrier 1b, 1c latent image pattern 2 Downstream member of optical system 3 Conductive layer 13 Development device
Claims (5)
像を形成し、現像装置によって該静電潜像を現像する電
子写真方式の画像形成装置において、前記露光光学系の
最も下流側にある光学系最下流部材の下流側表面には、
電気伝導性を有する伝導層が形成されており、該伝導層
に少なくとも交流電圧を印加することにより、該伝導層
に付着したトナーを除去することを特徴とする画像形成
装置。1. An electrophotographic image forming apparatus in which an electrostatic latent image is formed on a latent image carrier using an exposure optical system and the electrostatic latent image is developed by a developing device. On the downstream surface of the most downstream member of the optical system,
An image forming apparatus, wherein a conductive layer having electrical conductivity is formed, and by applying at least an alternating voltage to the conductive layer, the toner attached to the conductive layer is removed.
記潜像担持体上には該潜像担持体の回転方向に順次、帯
電部と非帯電部が現われるような所定の潜像パターンに
応じたタイミングで前記光学系最下流部材の伝導層に少
なくとも交流電圧を印加することにより、該伝導層に付
着したトナーを潜像パターンに付着させることを特徴と
する画像形成装置。2. The image forming apparatus according to claim 1, wherein the latent image carrier has a predetermined latent image pattern in which a charged portion and a non-charged portion appear in succession in the rotation direction of the latent image carrier. An image forming apparatus, characterized in that at least an AC voltage is applied to the conductive layer of the most downstream member of the optical system at a corresponding timing so that the toner attached to the conductive layer is attached to the latent image pattern.
電圧を印加する時に、前記潜像担持体側に近接した位置
に移動させるための部材移動手段を設けていることを特
徴とする請求項２記載の画像形成装置。3. A member moving means for moving the most downstream member of the optical system to a position close to the latent image carrier side when at least an AC voltage is applied. The image forming apparatus described.
担持体から所定距離離れた位置に、該現像装置を回転若
しくは移動させる現像部退避手段を設けていることを特
徴とする請求項２記載の画像形成装置。4. A developing unit retracting means for rotating or moving the developing device is provided at a position apart from the regular position of the AC voltage by a predetermined distance from the latent image carrier. 2. The image forming apparatus according to 2.
モードスイッチを複写機本体に設けていることを特徴と
する請求項１及び請求項２記載の画像形成装置。5. The image forming apparatus according to claim 1, wherein a mode switch for arbitrarily applying the AC voltage is provided in the copying machine main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18879091A JPH0535154A (en) | 1991-07-29 | 1991-07-29 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18879091A JPH0535154A (en) | 1991-07-29 | 1991-07-29 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0535154A true JPH0535154A (en) | 1993-02-12 |
Family
ID=16229843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18879091A Pending JPH0535154A (en) | 1991-07-29 | 1991-07-29 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0535154A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7112691B2 (en) | 2004-06-18 | 2006-09-26 | Shin-Etsu Chemical Co., Ltd. | Purification method for organometallic compounds and organometallic compounds obtained therefrom |
| US7179931B2 (en) | 2004-06-18 | 2007-02-20 | Shin-Etsu Chemical Co., Ltd. | High-purity trimethylaluminum and purification method of crude trimethylaluminum |
| US7345292B2 (en) | 2003-03-07 | 2008-03-18 | Hitachi, Ltd. | Particle beam therapy system |
| US7465944B2 (en) | 2003-07-07 | 2008-12-16 | Hitachi, Ltd. | Charged particle therapy apparatus and charged particle therapy system |
| JP2015090425A (en) * | 2013-11-06 | 2015-05-11 | 株式会社リコー | Fixing apparatus and image forming apparatus |
-
1991
- 1991-07-29 JP JP18879091A patent/JPH0535154A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7345292B2 (en) | 2003-03-07 | 2008-03-18 | Hitachi, Ltd. | Particle beam therapy system |
| US7465944B2 (en) | 2003-07-07 | 2008-12-16 | Hitachi, Ltd. | Charged particle therapy apparatus and charged particle therapy system |
| US7112691B2 (en) | 2004-06-18 | 2006-09-26 | Shin-Etsu Chemical Co., Ltd. | Purification method for organometallic compounds and organometallic compounds obtained therefrom |
| US7179931B2 (en) | 2004-06-18 | 2007-02-20 | Shin-Etsu Chemical Co., Ltd. | High-purity trimethylaluminum and purification method of crude trimethylaluminum |
| JP2015090425A (en) * | 2013-11-06 | 2015-05-11 | 株式会社リコー | Fixing apparatus and image forming apparatus |
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