JPH03246571A - Developing device provided with cleaning means - Google Patents
Developing device provided with cleaning meansInfo
- Publication number
- JPH03246571A JPH03246571A JP90401990A JP40199090A JPH03246571A JP H03246571 A JPH03246571 A JP H03246571A JP 90401990 A JP90401990 A JP 90401990A JP 40199090 A JP40199090 A JP 40199090A JP H03246571 A JPH03246571 A JP H03246571A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- developing device
- image area
- effective image
- cleaning
- 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
- 238000004140 cleaning Methods 0.000 title claims abstract description 26
- 238000011109 contamination Methods 0.000 abstract description 3
- 108091008695 photoreceptors Proteins 0.000 description 30
- 238000000034 method Methods 0.000 description 18
- 239000000463 material Substances 0.000 description 7
- 238000003756 stirring Methods 0.000 description 6
- GXCLVBGFBYZDAG-UHFFFAOYSA-N N-[2-(1H-indol-3-yl)ethyl]-N-methylprop-2-en-1-amine Chemical compound CN(CCC1=CNC2=C1C=CC=C2)CC=C GXCLVBGFBYZDAG-UHFFFAOYSA-N 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 229920002681 hypalon Polymers 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
- Cleaning In Electrography (AREA)
Abstract
Description
［０００１］ [0001]
本発明は電子写真複写機を初めとする静電記録装置等に
おける現像装置に関するものであり、特に静電荷保持体
（感光体、誘電体など）上の有効画像面外に更に取り除
いた現像剤を剥離除去させるクリーニング手段を有した
現像装置に関するものである。
［０００２］The present invention relates to a developing device in an electrostatic recording device such as an electrophotographic copying machine, and in particular to a developing device that removes developer further outside the effective image plane on an electrostatic charge holding member (photoreceptor, dielectric, etc.). This invention relates to a developing device having a cleaning means for peeling and removal. [0002]
例えば電子写真複写機の一例として、静電荷保持体とし
ての感光体をドラム状に形成して、この感光体ドラムを
一定方向へ回転させながら、帯電工程および露光工程を
経て静電潜像を形成し、これを現像工程で可視化したの
ち、この可視像を次の転写工程で転写材、例えば転写紙
へ転写する、いわゆる可視像転写方式を採用したもので
ある。
［０００３］
かかる形式の電子複写機において、感光体ドラムには、
現像剤による可視像が形成される。この可視像は、転写
工程において、その大部分が転写紙へ転写されるカミ可
視像を形成している現像剤の一部は感光体ドラム表面に
残留する。この残留現像剤は、次の複写プロセスが開始
される前に感光体ドラム表面から完全に除去しなければ
ならない。このなめ、転写工程後に除電工程やクリーニ
ング工程を行い、残留電荷と残留現像剤を除去している
。
［０００４］For example, in an electrophotographic copying machine, a photoreceptor as an electrostatic charge holding member is formed into a drum shape, and while the photoreceptor drum is rotated in a fixed direction, an electrostatic latent image is formed through a charging process and an exposure process. After this is visualized in a developing step, this visible image is transferred to a transfer material, for example, transfer paper, in the next transfer step, which is a so-called visible image transfer method. [0003] In this type of electronic copying machine, the photosensitive drum includes:
A visible image is formed by the developer. During the transfer process, most of this visible image is transferred to the transfer paper, but a portion of the developer forming the visible image remains on the surface of the photoreceptor drum. This residual developer must be completely removed from the photoreceptor drum surface before the next copying process begins. For this reason, after the transfer process, a static elimination process and a cleaning process are performed to remove residual charges and residual developer. [0004]
上記の複写プロセスにおいて、感光体ドラム表面の軸方
向長さ（母線長さ）は、一般には複写可能な有効画像領
域長さ（例えばＡ３判複写幅約３００ｍｍ ）より長め
に設定されている。このため、感光体ドラム表面の上記
有効画像領域外に現像剤が付着し、この余分な現像剤は
以後の工程の部材例えば転写極、分離極、除電極、クリ
ーニング装置、その他複写機内に落下飛散して汚し、そ
れぞれの機能を低下させるばかりでなく、クリーニング
装置への余分な負荷を与えるなどの弊害を生じる。
［０００５］
上記感光体表面の有効画像領域外に現像剤が付着する理
由は主に次の通りである。
［０００６］
（１）帯電工程において、感光体ドラム上の有効画像領
域外まで帯電される。
［０００７］
（２）現像工程において、現像スリーブ内のマグネット
の磁力線は上記有効画像領域外にも波及する。
［０００８］
（３）現像工程において、現像器内の穂立ち規制板は現
像スリーブ上の上記有効画像領域相当寸法より外側にま
で現像剤を散布し、この余分の現像剤が感光体ドラム上
に吸引される。
［０００９］
上記の理由によって、感光体ドラムの表面上の両端付近
に更に取り除いた現像剤は前記の諸弊害を生ぜしめるの
で、従来以下のいくつかの方法が提案されている。
［００１０］
（ａ）現像工程と複写工程との間で、上記感光体ドラム
の有効画像領域外に、モルトブレンのような発泡弾性体
を押し当てて、上記余分の現像剤を擦り落す。
［００１１］
（ｂ）上記（ａ）項のモルトブレンに代えて、ポリエチ
レンテレフタレート（ＰＥＴ′Ｉｅ開十聞手−ど４６ｂ
７１ （４））やテフロンのようなプラスチックシート
の一端を当接させて、上記余分な現像剤を拭き取る。
［００１２］
（Ｃ）現像工程と転写工程との間で、上記感光体ドラム
の有効画像領域外に近接して捕集マグネットを設け、余
分の現像剤を吸着する。
［００１３］
しかしながら、上記の方法においては次のような欠点が
ある。即ち、上記（ａ）項のモルトブレンを用いた場合
には、現像剤がモルトブレン内に蓄積され、次第にクリ
ーニング効果が弱くなり、このため適時交換せねばなら
ず面倒である。
上記（ｂ）項のプラスチックシートを用いた場合には、
感光体ドラムへの圧接力か弱く現像剤剥落が充分性われ
ない。また上記（ａ） （ｂ）何れの場合にも感光
体ドラム表面から捕集した余分の現像剤は回収困難でか
つ捕集廃棄手段を別途に設けねばならない。
［００１４］
以上のように上記の感光体ドラムの両側方に更に取り除
いた余分の現像剤を除去するため、確実で容易な方法は
未だ不充分なものである。
［００１５］
本発明は上記の点に鑑み成されたもので、感光体ドラム
表面の両側方の非有効画像領域に更に取り除いた現像剤
を確実容易に除去し、かつこの除去捕集された現像剤を
回収できるクリーニング手段を提供することを目的とす
るものである。
［００１６］In the above copying process, the axial length (generator length) of the surface of the photoreceptor drum is generally set longer than the effective copyable image area length (for example, A3 size copy width of about 300 mm). As a result, developer adheres to areas outside the effective image area on the surface of the photoreceptor drum, and this excess developer falls and scatters onto components used in subsequent processes, such as transfer poles, separation poles, removal electrodes, cleaning devices, and other parts within the copying machine. This not only deteriorates the functions of each cleaning device, but also causes harmful effects such as placing an extra load on the cleaning device. [0005] The main reasons why the developer adheres outside the effective image area on the surface of the photoreceptor are as follows. [0006] (1) In the charging step, the photosensitive drum is charged to the outside of the effective image area. [0007] (2) In the developing process, the lines of magnetic force of the magnet within the developing sleeve also spread outside the effective image area. [0008] (3) In the developing process, the spike control plate in the developing device scatters the developer to the outside of the above-mentioned effective image area equivalent dimension on the developing sleeve, and this excess developer is deposited on the photoreceptor drum. be attracted. [0009] For the above-mentioned reasons, the developer further removed near both ends of the surface of the photoreceptor drum causes the above-mentioned problems, and therefore several methods have been proposed as follows. [0010] (a) Between the developing step and the copying step, a foamed elastic body such as maltbrene is pressed against the outside of the effective image area of the photoreceptor drum to scrape off the excess developer. [0011] (b) Instead of maltbrene in the above (a), polyethylene terephthalate (PET'Ie Kaijumonte-do 46b)
71 (4)) or a plastic sheet such as Teflon, and wipe off the excess developer. [0012] (C) Between the development process and the transfer process, a collection magnet is provided close to the outside of the effective image area of the photosensitive drum to adsorb excess developer. [0013] However, the above method has the following drawbacks. That is, when the malt blend described in item (a) above is used, the developer accumulates in the malt blend, and the cleaning effect gradually becomes weaker. Therefore, it is necessary to replace the malt blend from time to time, which is troublesome. When using the plastic sheet in item (b) above,
The pressure contact force against the photoreceptor drum is weak and the developer is not sufficiently prevented from peeling off. Furthermore, in either case (a) or (b) above, it is difficult to recover the excess developer collected from the surface of the photoreceptor drum, and a collection and disposal means must be provided separately. [0014] As described above, a reliable and easy method for removing the excess developer further removed from both sides of the photoreceptor drum is still insufficient. [0015] The present invention has been made in view of the above points, and is capable of reliably and easily removing the developer further removed from the non-effective image areas on both sides of the surface of the photoreceptor drum, and removing the collected developer. The purpose of this invention is to provide a cleaning means that can recover the agent. [0016]
【課題を解決するための手段】
かかる本発明の目的は、上記した如き形式の静電記録装
置において、静電荷保持体上の静電潜像を乾式現像剤を
用いて現像する現像、前記有効画像領域外に、静電荷保
持体面の有効画像領域外に対向して圧接するように弾性
を有する板状のクリーニング部材を設け、前記有効画像
領域外に更に取り除いた現像剤のみを除去し、更に取り
除いた現像剤を現像装置の筐体内に回収するようにした
ことを特徴とするクリーニング手段を備えた現像装置に
よって達成される。
７８４−
［００１７］
そして本発明によるクリーニング手段を現像装置内に配
設することによって、現像直後に余分な現像剤を除去し
、かつ現像剤の回収が容易になり、その上簡単な部材に
よってこれらを達成でき、繰り返し使用して半永続的に
良好な結果が得られる。
［００１８］[Means for Solving the Problems] An object of the present invention is to develop an electrostatic latent image on an electrostatic charge holding member using a dry developer in an electrostatic recording device of the type described above, An elastic plate-shaped cleaning member is provided outside the image area so as to face and press against the outside of the effective image area on the surface of the electrostatic charge holding member, and removes only the developer further removed outside the effective image area, and further This is achieved by a developing device equipped with a cleaning means characterized in that the removed developer is collected into a housing of the developing device. 784- [0017] By disposing the cleaning means according to the present invention in the developing device, excess developer can be removed immediately after development, and the developer can be easily recovered. can be achieved and semi-permanent good results can be obtained with repeated use. [0018]
以下、図示の実施例によって本発明の詳細な説明する。
［００１９］
先ず、図１に基づいて、本発明を適用する静電記録装置
としての電子写真複写機の構成について説明する。同図
において、１は電荷保持体としてセレン等からなる光導
電体層を周面に有する感光体ドラムを示している。感光
体ドラム１は矢印方向に回転するようになっていて、こ
れらの周囲には感光体ドラム１を全面均一に特定の極性
に帯電させる帯電極２、図示されない原稿の光像を感光
体ドラム表面に照射して原稿画像に応じた静電潜像を形
成するスリット形成部材３を代表させて示す露光装置、
静電潜像を形成された感光体ドラム１に現像剤を供給し
て潜像を可視像化する現像装置４、可視像に転写材とし
ての転写紙を密着させて、転写紙の背面からコロナ放電
を行って可視像を転写紙へ転写する転写極５、感光体ド
ラム１の表面に密着した転写紙を分離させるための分離
極６、感光体ドラム１の表面と現像剤の電荷を電気的に
中和させるためコロナ放電させる除電極、転写しきれず
に感光体ドラム１の表面に残った現像剤を掻き落とすク
リーニング装置８、クリーニング後の感光体ドラム１に
光照射してドラム上の電荷を完全に消去する前露光装置
９がこの順に配置されている。これらの各装置の作用と
詳細については周知であるから、その説明は省略する。
なお現像装置４により供給される現像剤は、二成分系、
−成分系を問わない。
［００２０］
次に本発明に係る現像装置４を図１に従って説明する。
［００２１］
図示しない現像剤補給タンクより現像装置４内に補給さ
れた現像剤は、回転するスパイラルスクリュー状の補給
部材１１によって、受入器１２内で主撹拌部材１３によ
って撹拌されながら投入される現像剤と混合されながら
、トナー落下開口１２Ａより落下する。落下点では現像
剤中で時計方向に回転するスパイラルスクリュー状の補
助撹拌部材１４により更に撹拌混合され、主撹拌部材１
３の方向に移動される。主撹拌部材１３は回転軸上に多
数の円板状の撹拌翼を有するもので、現像剤を現像ロー
ラの方向に送ると共に、撹拌翼上に掬い上げた現像剤を
前記受入器１２内に投入する。現像ローラ内のマグネッ
ト１５によりスリーブ１６上に吸引された現像剤は、穂
切り板１７により適量だけスリーブ１６上に均一の厚さ
に付着されて搬送され現像領域に達し静電荷潜像を現像
し、可視のトナー像を形成し、残余の現像剤はスリーブ
１６上を搬送され再び現像容器内に戻される。
［００２２］
以上述べた現像装置４を構成する筐体２０が感光体ドラ
ム１に近接する位置には本発明によるクリーニングブレ
ード（以下ブレードと称す）２１の一端がブレードホル
ダ２２によって筐体２０の一端に固定されている。また
片持ち状の該ブレード２１の他端は感光体ドラム１の表
面に所定圧力で圧接されている。上記ブレード２１は前
述の有効画像領域外に設けられていて、その配設位置を
図２に示す。Ａは感光体ドラム１の光導電体層部の軸方
向長さを示す。Ｂは感光体ドラム上に形成される有効画
像領域であり、最大複写可能サイズＣに多少の余裕を加
えた寸法であり、一般にＡ３判複写可能な複写機におい
てＢ＝約３００ｍｍ、 、 Ｂ ４判複写可能な複写機
の場合はＢ＝約２６０ｍｍである。
［００２３］
同図において、感光体ドラム１の両端部と有効画像領域
との間には、前記ブレード２１がそれぞれ配設されてい
る。よってブレード２１の圧接長さはそれぞれ（Ａ−Ｂ
）／２である。
［００２４］
このような寸法と位置に配設されたブレード２１は、一
端が筐体２０に固定され、他端が感光体ドラム１に所定
角度をなして、所定圧力で圧接している。
［００２５］
現像スリーブ１６によって現像され感光体ドラム１上に
更に取り除いた現像剤は、前述のように有効画像領域Ｂ
の外側にまでまわり込んでいるが、現像装置筐体２０の
両側部に配設された本発明によるブレード２１によって
、感光体ドラム１の有効画境域外に更に取り除いた余分
の現像剤は、掻き落とされて現像装置内に回収され、再
び現像に用いられる。
［００２６］
なお、本発明に用いられるブレード２１の材料としては
、クリーニング性に借れ極めて耐久性に富み、かつ潤滑
性良好な特性を有する合成樹脂等に添加剤を含有させて
成形したものが用いられる。例えばポリウレタンゴム、
ニトリルブタジェンゴム、スチレンブタジェンゴム、ク
ロロスルホン化ポリエチレンゴム、弗素ゴム、イソプレ
ンゴム等の単体またはこれらの何れかにシランカップリ
ング剤を加えたもの、あるいはテフロン、シリコーンゴ
ム等の滑り性のある材質を選択して成形したもの等が良
い。
［００２７］
または潤滑性材料と弾性材料とを多層状になした複合ブ
レードを用いることも可能であるる
一方、一般に現像装置はユニット化して複写機本体内に
着脱可能となしたものが多い。この場合多くは複写機の
手前方向（図１の紙面上方）に引き出す形式が用いられ
ているが、この形式では本発明のブレード２１を揺動可
能な構造となし、手動によりブレード２１を圧接・解除
可能となしたりあるいはカム等の手段により現像装置４
の着脱に連動してブレード２１の圧接・解除を自動的に
行わせる等の手段を用いる。
［００２８］
図１はブレード２１を固定配置した図を示しているが、
この場合には現像装置４を感光体ドラム１と離間する方
向（例えば図１の紙面右側）に移動することによって、
現像装置の取り外しと同時にブレードの圧接が解除され
る。
［００２９］
以上の説明では静電記録装置のうち、電子写真複写機の
一例について述べたが他の形式の電子写真複写機や露光
用光源としてレーザー光やオプチカルファイバ等を用い
たコンピュータ出力装置やファクシミリ等の記録装置、
あるいは静電荷保持体として誘電体ドラムを用いた静電
記録装置等においても、本発明による現像装置内の両側
部に前記ブレードを設けることにより、感光体ドラムま
たは誘電体ドラムの有効画像領域外に更に取り除いた現
像剤を掻き落とし、現像装置内に回収することができる
。また、静電荷保持体として、前記感光体ドラムの他に
感光体ベルト等にも適用可能である。
［００３０］Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments. [0019] First, the configuration of an electrophotographic copying machine as an electrostatic recording device to which the present invention is applied will be explained based on FIG. In the figure, reference numeral 1 indicates a photosensitive drum having a photoconductor layer made of selenium or the like on its circumferential surface as a charge carrier. The photoreceptor drum 1 is designed to rotate in the direction of the arrow, and around the photoreceptor drum 1 is a charging electrode 2 that uniformly charges the entire surface of the photoreceptor drum 1 to a specific polarity. an exposure device representatively showing a slit forming member 3 that forms an electrostatic latent image according to a document image by irradiating the image;
A developing device 4 supplies a developer to the photoreceptor drum 1 on which an electrostatic latent image has been formed to make the latent image visible, and a transfer paper serving as a transfer material is brought into close contact with the visible image, and the back side of the transfer paper is placed in close contact with the visible image. a transfer pole 5 that transfers a visible image to transfer paper by performing corona discharge from the surface; a separation pole 6 that separates the transfer paper that is in close contact with the surface of the photoreceptor drum 1; and charges on the surface of the photoreceptor drum 1 and the developer. a cleaning device 8 that scrapes off the developer remaining on the surface of the photoreceptor drum 1 without being completely transferred; A pre-exposure device 9 for completely erasing the charges is arranged in this order. Since the operation and details of each of these devices are well known, their explanation will be omitted. Note that the developer supplied by the developing device 4 is a two-component developer,
- Regardless of the component system. [0020] Next, the developing device 4 according to the present invention will be described with reference to FIG. [0021] The developer supplied into the developing device 4 from a developer supply tank (not shown) is fed into the receiver 12 while being stirred by the main stirring member 13 by the rotating spiral screw-shaped supply member 11. The toner falls from the toner drop opening 12A while being mixed with the toner. At the falling point, the developer is further stirred and mixed by a spiral screw-shaped auxiliary stirring member 14 rotating clockwise in the developer, and the main stirring member 1
Moved in direction 3. The main stirring member 13 has a large number of disc-shaped stirring blades on a rotating shaft, and sends the developer in the direction of the developing roller, and also throws the developer scooped up onto the stirring blades into the receiver 12. do. The developer attracted onto the sleeve 16 by the magnet 15 in the developing roller is conveyed in an appropriate amount onto the sleeve 16 with a uniform thickness by the cutting plate 17, and reaches the developing area to develop the electrostatic latent image. , a visible toner image is formed, and the remaining developer is conveyed on the sleeve 16 and returned to the developer container. [0022] At a position where the housing 20 constituting the developing device 4 described above is close to the photosensitive drum 1, one end of a cleaning blade (hereinafter referred to as a blade) 21 according to the present invention is attached to one end of the housing 20 by a blade holder 22. is fixed. The other end of the cantilevered blade 21 is pressed against the surface of the photoreceptor drum 1 with a predetermined pressure. The blade 21 is provided outside the above-mentioned effective image area, and its placement position is shown in FIG. A indicates the axial length of the photoconductor layer portion of the photosensitive drum 1. B is the effective image area formed on the photoreceptor drum, and is the maximum copyable size C plus some margin; generally, in a copier that can make A3 size copies, B = approximately 300 mm; In the case of a copier that can make copies, B=about 260 mm. [0023] In the figure, the blades 21 are disposed between both ends of the photosensitive drum 1 and the effective image area. Therefore, the pressure contact length of the blade 21 is (A-B
)/2. [0024] The blade 21 arranged in such a size and position has one end fixed to the housing 20 and the other end pressed against the photosensitive drum 1 at a predetermined angle and under a predetermined pressure. [0025] The developer developed by the developing sleeve 16 and further removed onto the photoreceptor drum 1 is transferred to the effective image area B as described above.
However, the excess developer that is further removed outside the effective image area of the photoreceptor drum 1 by the blades 21 according to the present invention disposed on both sides of the developing device housing 20 is scraped off. The film is collected in the developing device and used again for development. [0026] The material of the blade 21 used in the present invention is one made by molding a synthetic resin or the like containing additives, which has good cleaning properties, is extremely durable, and has good lubricity properties. used. For example, polyurethane rubber,
Nitrile butadiene rubber, styrene butadiene rubber, chlorosulfonated polyethylene rubber, fluorine rubber, isoprene rubber, etc., or any of these with a silane coupling agent added, or slippery materials such as Teflon, silicone rubber, etc. It is best to use a molded material made of selected materials. [0027]Although it is also possible to use a composite blade made of multiple layers of a lubricating material and an elastic material, the developing device is generally formed into a unit and is often detachably attached to the main body of the copying machine. In this case, in most cases, a method is used in which the copying machine is pulled out in the front direction (above the plane of the paper in FIG. 1), but in this method, the blade 21 of the present invention has a swingable structure, and the blade 21 is manually pressed and pressed. The developing device 4 can be opened by making it releasable or by means such as a cam.
The blade 21 is automatically pressed and released in conjunction with the attachment and detachment of the blade 21. [0028] Although FIG. 1 shows a diagram in which the blade 21 is fixedly arranged,
In this case, by moving the developing device 4 in a direction away from the photosensitive drum 1 (for example, to the right side of the paper in FIG. 1),
The blade is released from pressure at the same time as the developing device is removed. [0029] In the above explanation, an example of an electrophotographic copying machine among electrostatic recording devices has been described, but other types of electrophotographic copying machines, computer output devices using laser light, optical fiber, etc. as an exposure light source, and Recording devices such as facsimiles,
Alternatively, in an electrostatic recording device using a dielectric drum as an electrostatic charge retainer, by providing the blades on both sides of the developing device according to the present invention, the blades can be placed outside the effective image area of the photoreceptor drum or dielectric drum. Further, the removed developer can be scraped off and collected into the developing device. In addition to the photoreceptor drum, a photoreceptor belt or the like can also be used as the electrostatic charge retainer. [0030]
本発明によるクリーニング手段によって感光体ドラムの
表面の両側方の非有効画像領域に更に取り除いた現像剤
は確実に除去され、かっての除去捕集された現像剤は現
像装置内に回収できるから、静電記録装置内への現像剤
飛散による汚染は解除され、また、転写後のクリーニン
グ装置（図示せず）に対する負荷が減少し、クリーニン
グ効率が向上した。The cleaning means according to the present invention reliably removes the developer further removed from the ineffective image areas on both sides of the surface of the photoreceptor drum, and the developer that was previously removed and collected can be collected in the developing device, so that it remains static. Contamination caused by developer scattering inside the electrorecording device was eliminated, and the load on the post-transfer cleaning device (not shown) was reduced, resulting in improved cleaning efficiency.
【図１】 図１は本発明に係る電子写真複写機の断面図。[Figure 1] FIG. 1 is a sectional view of an electrophotographic copying machine according to the present invention.
【図２】 図２は本発明のブレード配設位置を示す図。[Figure 2] FIG. 2 is a diagram showing the blade arrangement position of the present invention.
１・・・感光体ドラム ４・・・現像装置
１６・・・現像スリーブ ２０・・・筐体
２１・・・クリーニングブレード ２２・・・ブレ
ードホルダ７８８−1... Photosensitive drum 4... Developing device 16... Developing sleeve 20... Housing 21... Cleaning blade 22... Blade holder 788-
【図１】 の[Figure 1] of
Claims (1)
用いて現像する現像装置の筐体の現像部両側方に、静電
荷保持体面の有効画像領域外に対向して圧接するように
弾性を有する板状のクリーニング部材を設け、前記有効
画像領域外に付着した現像剤のみを除去し、更に取り除
いた現像剤を現像装置の筐体内に回収するようにしたこ
とを特徴とするクリーニング手段を備えた現像装置。Claim 1: A device that is pressed against both sides of a developing section of a housing of a developing device that develops an electrostatic latent image on an electrostatic charge holder using a dry developer, facing outside the effective image area of the surface of the electrostatic charge holder. An elastic plate-shaped cleaning member is provided to remove only the developer attached outside the effective image area, and the removed developer is collected into the housing of the developing device. A developing device equipped with cleaning means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP90401990A JPH03246571A (en) | 1990-12-13 | 1990-12-13 | Developing device provided with cleaning means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP90401990A JPH03246571A (en) | 1990-12-13 | 1990-12-13 | Developing device provided with cleaning means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03246571A true JPH03246571A (en) | 1991-11-01 |
Family
ID=18511798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP90401990A Pending JPH03246571A (en) | 1990-12-13 | 1990-12-13 | Developing device provided with cleaning means |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03246571A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014112152A (en) * | 2012-12-05 | 2014-06-19 | Fuji Xerox Co Ltd | Image forming apparatus |
| US20200209804A1 (en) * | 2018-12-28 | 2020-07-02 | Canon Kabushiki Kaisha | Process cartridge and developing cartridge |
| JP2020183983A (en) * | 2019-04-26 | 2020-11-12 | キヤノン株式会社 | Cartridge and image forming apparatus |
| JP2022186928A (en) * | 2018-12-28 | 2022-12-15 | キヤノン株式会社 | Developing cartridge |
-
1990
- 1990-12-13 JP JP90401990A patent/JPH03246571A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014112152A (en) * | 2012-12-05 | 2014-06-19 | Fuji Xerox Co Ltd | Image forming apparatus |
| US20200209804A1 (en) * | 2018-12-28 | 2020-07-02 | Canon Kabushiki Kaisha | Process cartridge and developing cartridge |
| JP2020106703A (en) * | 2018-12-28 | 2020-07-09 | キヤノン株式会社 | Process cartridge and developing cartridge |
| US11112753B2 (en) * | 2018-12-28 | 2021-09-07 | Canon Kabushiki Kaisha | Cartridge with a sheet to remove matter from a surface of a photosensitive drum |
| US11480916B2 (en) | 2018-12-28 | 2022-10-25 | Canon Kabushiki Kaisha | Cartridge having toner removing sheet in contact with photosensitive drum |
| JP2022186928A (en) * | 2018-12-28 | 2022-12-15 | キヤノン株式会社 | Developing cartridge |
| JP2023027347A (en) * | 2018-12-28 | 2023-03-01 | キヤノン株式会社 | Developing cartridge |
| US11841647B2 (en) | 2018-12-28 | 2023-12-12 | Canon Kabushiki Kaisha | Cartridge and developing cartridge including a frame and sheet member provided at end side of the frame |
| JP2020183983A (en) * | 2019-04-26 | 2020-11-12 | キヤノン株式会社 | Cartridge and image forming apparatus |
| US11209773B2 (en) * | 2019-04-26 | 2021-12-28 | Canon Kabushiki Kaisha | Cartridge and image forming apparatus |
| JP2022093491A (en) * | 2019-04-26 | 2022-06-23 | キヤノン株式会社 | Cartridge and image forming apparatus |
| US11733644B2 (en) | 2019-04-26 | 2023-08-22 | Canon Kabushiki Kaisha | Cartridge and image forming apparatus |
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