JPH0744018A - Development device - Google Patents
Development deviceInfo
- Publication number
- JPH0744018A JPH0744018A JP20823593A JP20823593A JPH0744018A JP H0744018 A JPH0744018 A JP H0744018A JP 20823593 A JP20823593 A JP 20823593A JP 20823593 A JP20823593 A JP 20823593A JP H0744018 A JPH0744018 A JP H0744018A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- sleeve
- surface member
- developing device
- doctor blade
- 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.)
- Granted
Links
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
(57)【要約】
【目的】 画像形成装置の初期設置時のセットアップに
かかる時間を短縮する現像装置を提供することを目的と
する。
【構成】 現像装置１内のスリーブ７の幅方向に沿って
配置されるドクターブレード９の手前にスリーブ７に対
向して一部を覆うように現像剤と接触する面部材を配置
した。
(57) [Summary] [Objective] An object of the present invention is to provide a developing device that shortens the setup time at the time of initial installation of the image forming apparatus. A surface member that is in contact with the developer is arranged in front of a doctor blade 9 arranged along the width direction of the sleeve 7 in the developing device 1 so as to face the sleeve 7 and cover a part thereof.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複写機、プリンタ等の
画像形成装置における現像装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device in an image forming apparatus such as a copying machine or a printer.
【０００２】[0002]
【従来の技術】複写機、プリンタ等の画像形成装置にお
いて、現像装置の現像ローラは、その内部に固定または
回転する磁石ロールと、その外周面を一定速度で像担持
体の回転方向に対して正または逆方向に回転する円筒中
空のスリーブを有している。現像装置内に収容されてい
るトナーおよびキャリアからなる１成分または２成分の
現像剤を用いて前記スリーブ上に磁気ブラシを形成す
る。磁気ブラシは、像担持体に接触または非接触等の方
法によりトナーを像担持体へと搬送している。2. Description of the Related Art In an image forming apparatus such as a copying machine or a printer, a developing roller of a developing device has a magnet roll fixed or rotating therein and an outer peripheral surface thereof at a constant speed with respect to a rotating direction of an image carrier. It has a cylindrical hollow sleeve that rotates in the forward or reverse direction. A magnetic brush is formed on the sleeve by using a one-component or two-component developer containing a toner and a carrier contained in a developing device. The magnetic brush conveys the toner to the image carrier by a method such as contacting or non-contacting the image carrier.
【０００３】スリーブの幅方向に沿ってスリーブ上に形
成された磁気ブラシを均一に像担持体に供給するために
ドクターブレードが設けられており、このドクターブレ
ードとスリーブとの距離を規制して磁気ブラシの厚みを
所定値になるように規制している。A doctor blade is provided in order to uniformly supply the magnetic brush formed on the sleeve along the width direction of the sleeve to the image carrier. The distance between the doctor blade and the sleeve is regulated so that the magnetic field is reduced. The thickness of the brush is regulated to a predetermined value.
【０００４】かかる現像装置において、画像形成装置の
初期設置のセットアップ時に、現像装置内のまだ帯電さ
れていない現像剤を帯電させるために、現像装置を空運
転させて現像剤とドクターブレードおよびスリーブとの
摩擦帯電によってあるいはアジテータによって現像剤を
帯電させている。In such a developing device, at the time of initial setup of the image forming device, in order to charge the uncharged developer in the developing device, the developing device is idled to remove the developer, the doctor blade and the sleeve. The developer is charged by the triboelectric charging or by the agitator.
【０００５】[0005]
【発明が解決しようとする課題】このような構成におい
て、特に１成分現像剤を用いる現像装置は、２成分現像
剤に比較してキャリアを用いないため、現像剤同士の摩
擦接触面が少なくなる。このため現像剤の帯電効率が悪
くなり前記した現像装置のセットアップ時の空運転にか
かる時間が甚だしくは３０分〜１時間と非常に長くな
る。また、現像剤の消費量が多いコピーを多数枚複写す
ると、現像剤を帯電する量より補充される帯電していな
い現像剤の量が多くなるため除々に文字やラインの周辺
にトナーの飛散が発生して解像力が低下する。In such a structure, the developing device using the one-component developer does not use the carrier as compared with the two-component developer, so that the friction contact surface between the developers is reduced. . For this reason, the charging efficiency of the developer is deteriorated, and the time taken for the idle operation at the time of setting up the developing device is extremely long, that is, 30 minutes to 1 hour. Also, when a large number of copies that consume a large amount of developer are copied, the amount of uncharged developer that is replenished becomes larger than the amount that charges the developer, so toner is gradually scattered around the characters and lines. It occurs and the resolution is lowered.
【０００６】本発明は、上記した問題点に鑑みてなされ
たものであり、画像形成装置の初期設置のセットアップ
時における現像装置内の現像剤を帯電するまでに必要な
時間を短縮し、且つ転写材上の文字およびライン周辺に
トナーの飛散が発生しない現像装置を提供することを課
題とする。The present invention has been made in view of the above-mentioned problems, and shortens the time required to charge the developer in the developing device at the time of initial setup of the image forming apparatus and reduces the transfer time. An object of the present invention is to provide a developing device in which toner is not scattered around characters and lines on a material.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するた
め、本発明による現像装置は、磁石ロールを内臓するス
リーブ上に磁石ロールの磁界により現像剤を付着させ
て、この現像剤の厚みをドクターブレードにより規制し
た後、像担持体へと搬送する現像装置において、前記ド
クターブレードの手前に前記スリーブに対向してスリー
ブの一部を覆うように前記現像剤と接触する面部材を配
置していることを特徴とする。In order to solve the above-mentioned problems, the developing device according to the present invention is configured such that a developer is attached to a sleeve containing a magnet roll by a magnetic field of the magnet roll, and the thickness of the developer is adjusted by a doctor. In a developing device that is conveyed to an image carrier after being regulated by a blade, a surface member that is in contact with the developer is arranged in front of the doctor blade so as to face the sleeve and cover a part of the sleeve. It is characterized by
【０００８】[0008]
【作用】このような構成において、スリーブ上に形成し
た磁気ブラシが面部材とスリーブとの間に取り込まれ、
現像剤が面部材に対してスリーブの回転に伴って摺擦さ
れる。このため現像剤に対する摩擦接触面が増加して現
像剤の帯電が促進される。In this structure, the magnetic brush formed on the sleeve is taken in between the face member and the sleeve,
The developer is rubbed against the surface member as the sleeve rotates. Therefore, the frictional contact surface with the developer is increased, and the charging of the developer is promoted.
【０００９】[0009]
【実施例】この発明の好適な実施例を図面に基づいて説
明する。図１は本発明による実施例の一例を示す現像装
置の断面図であり、現像装置１は、現像剤２を内部に貯
溜するケーシング３を有する。現像剤には、磁性キャリ
アを必要としない１成分現像剤またはトナーおよびキャ
リアからなる２成分現像剤のいずれかが使用される。符
号４は静電潜像担持体としての感光ドラムであり、ケー
シング３は感光ドラム４側に開口５を形成している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a developing device showing an example of an embodiment according to the present invention, and the developing device 1 has a casing 3 that stores a developer 2 therein. As the developer, either a one-component developer that does not require a magnetic carrier or a two-component developer including a toner and a carrier is used. Reference numeral 4 is a photosensitive drum as an electrostatic latent image carrier, and the casing 3 has an opening 5 formed on the photosensitive drum 4 side.
【００１０】ケーシング３内には、矢印Ａ方向に回転し
ている感光ドラム４上に電子写真プロセスにより形成さ
れた静電潜像を現像するために現像ローラ６が設けられ
ている。現像ローラ６は、矢印Ｂ方向に回転する現像ス
リーブ７と、現像スリーブ７内に矢印Ｃ方向に回転する
磁石ロール８から構成することができる。スリーブ７
は、接地または適当なバイアス源に連結されており、磁
石ロール８の磁界よってスリーブ周面に現像剤２を吸着
させ磁気ブラシが形成される。現像ローラ６の上部に
は、スリーブ７に向かう方向に一様の高さで突出するよ
うにケーシング３の壁面に固定されたドクターブレード
９がスリーブ７の周面に形成された磁気ブラシを所定の
厚みに規制するように配置されている。磁石ロール８
は、周知のように周面に沿って交互に異なる極性の複数
の磁極を有しており、実施例では、１０極であるがその
数に限定はない。Inside the casing 3, a developing roller 6 is provided for developing an electrostatic latent image formed on the photosensitive drum 4 rotating in the direction of arrow A by an electrophotographic process. The developing roller 6 may include a developing sleeve 7 rotating in the arrow B direction and a magnet roll 8 rotating in the developing sleeve 7 in the arrow C direction. Sleeve 7
Is grounded or connected to a suitable bias source, and the magnetic field of the magnet roll 8 attracts the developer 2 to the sleeve peripheral surface to form a magnetic brush. On the upper part of the developing roller 6, a doctor blade 9 fixed to the wall surface of the casing 3 so as to project at a uniform height in the direction toward the sleeve 7 is provided with a magnetic brush formed on the peripheral surface of the sleeve 7 in a predetermined manner. It is arranged to regulate the thickness. Magnet roll 8
As is well known, has a plurality of magnetic poles having different polarities alternately along the circumferential surface. In the embodiment, the number is 10 poles, but the number is not limited.
【００１１】ケーシング３内には、現像剤２を攪拌し且
つ供給するための攪拌アーム１０が配設されている。攪
拌アーム１０は、回転軸１１を中心に矢印Ｄ方向に回転
しており、ケーシング３下部の円弧状に形成された壁面
１２を沿うように現像剤２を攪拌し、現像ローラ６の幅
方向に対して現像剤２を送り込んでいる。A stirring arm 10 for stirring and supplying the developer 2 is provided in the casing 3. The stirring arm 10 is rotating in the direction of the arrow D about the rotation shaft 11, and stirs the developer 2 along the wall surface 12 formed in the lower part of the casing 3 in an arc shape so as to move in the width direction of the developing roller 6. On the other hand, the developer 2 is being sent.
【００１２】ドクターブレード９の手前（図で見て右
側）には、スリーブ７の幅方向に沿ってスリーブ７の周
面の一部に対向且つ離間してそれを覆うように湾曲した
面部材１３がケーシング３の壁面に固定されており、そ
の先端入口部にはスリーブ外方に向かって折り曲げられ
た開口１４を有している。攪拌アーム１０により送り込
まれた現像剤２は、開口１４から入り込みスリーブ７の
回転と磁石ロール８の磁力線によってスリーブ７と面部
材１３との間を通って移動する。この際現像剤２は面部
材１３により摺擦されるように搬送される。その後現像
剤２は、ドクターブレード９によって磁気ブラシの厚み
を規制して感光ドラム４へ搬送する。面部材１３は、非
磁性体であるステンレス性部材が好適に使用されるが、
アルミニウム、プラスチック等のその他の材料であって
も良い。かかる面部材１３の材料は、使用する現像剤を
摩擦帯電できる材料であれば良い。In front of the doctor blade 9 (on the right side in the figure), a surface member 13 is curved along the width direction of the sleeve 7 so as to face a part of the peripheral surface of the sleeve 7 and to be spaced apart from the peripheral surface. Is fixed to the wall surface of the casing 3, and has an opening 14 bent toward the outside of the sleeve at the inlet of its tip. The developer 2 fed by the stirring arm 10 enters through the opening 14 and moves between the sleeve 7 and the surface member 13 by the rotation of the sleeve 7 and the magnetic force lines of the magnet roll 8. At this time, the developer 2 is conveyed so as to be rubbed by the surface member 13. After that, the developer 2 is conveyed to the photosensitive drum 4 with the thickness of the magnetic brush regulated by the doctor blade 9. The surface member 13 is preferably a non-magnetic stainless member,
Other materials such as aluminum and plastic may be used. The material of the surface member 13 may be any material that can frictionally charge the developer to be used.
【００１３】このような構成において、ケーシング３内
に貯留されている現像剤２は、回転軸１１を中心に矢印
Ｄ方向に回転する攪拌アーム１０によって現像ローラ６
方向に搬送される。次いで現像剤２は、矢印Ｃ方向に回
転する磁石ロール８の磁界によって矢印Ｂ方向に回転す
るスリーブ７上に吸着され、ケーシング３内に磁気ブラ
シを形成する。この磁気ブラシは、面部材１３の開口１
４から面部材１３とスリーブ７との間に収縮されるよう
に取り込まれて、さらにスリーブ７の回転により磁気ブ
ラシを面部材１３の腹部とスリーブ７との間で摺擦する
ようにスリーブ７上を通過する。このように現像剤２と
の摩擦接触面が増加することにより現像剤２の摩擦によ
る帯電効率が上がり短時間で現像剤２を帯電することが
できる。次いで磁気ブラシは、ドクターブレードによっ
て一定の厚さに規制され感光ドラム４に送られる。その
後、周知の電子写真プロセスにより感光ドラム４上にト
ナー像を形成して転写材上に画像形成を行う。In such a structure, the developer 2 stored in the casing 3 is developed by the agitating arm 10 which rotates about the rotating shaft 11 in the direction of the arrow D.
Is conveyed in the direction. Next, the developer 2 is attracted onto the sleeve 7 rotating in the arrow B direction by the magnetic field of the magnet roll 8 rotating in the arrow C direction, and forms a magnetic brush in the casing 3. This magnetic brush has an opening 1 in the face member 13.
4 is contracted between the surface member 13 and the sleeve 7, and the magnetic brush is rubbed between the abdomen of the surface member 13 and the sleeve 7 by the rotation of the sleeve 7. Pass through. By increasing the frictional contact surface with the developer 2 in this way, the charging efficiency due to the friction of the developer 2 is increased, and the developer 2 can be charged in a short time. Next, the magnetic brush is regulated to a constant thickness by a doctor blade and sent to the photosensitive drum 4. After that, a toner image is formed on the photosensitive drum 4 by a well-known electrophotographic process, and an image is formed on the transfer material.
【００１４】図２は、面部材１３をステンレス性の平板
状の面部材１５に代えた構成の現像装置の断面図であ
り、その他の符号は図１に準じている。現像剤２は、図
１と同様に面部材１５の開口１４とスリーブ７との間に
取り込まれるように搬送され、面部材１５の腹部をスリ
ーブ７との間で現像剤を摺察して帯電する。また、図３
は、従来における現像装置を示す断面図であり、面部材
１３が配置されていない他は図１に準じている。FIG. 2 is a sectional view of a developing device in which the surface member 13 is replaced by a stainless steel flat plate-shaped surface member 15, and other reference numerals are the same as those in FIG. The developer 2 is conveyed so as to be taken in between the opening 14 of the surface member 15 and the sleeve 7 as in FIG. 1, and the abdomen of the surface member 15 is slid between the sleeve 7 and the developer to be charged. . Also, FIG.
2 is a cross-sectional view showing a conventional developing device, which is the same as FIG. 1 except that the surface member 13 is not arranged.
【００１５】実験例１として図１に示す現像装置を用
い、面部材１３にステンレス性の部材を使用して以下の
条件で実験を行った。磁鉄鋼３５〜５０％、スチレンア
クリルポリマー５０〜７０％、ポリプロピレン０．２〜
１０％、メタルコンプレックス２〜５％、シリコンオキ
サイド０．５〜２％等を主成分とした電気抵抗が約１０
15オームの磁性トナーを用いて、スリーブ７表面に４０
０メッシュのブラスト処理を施し、スリーブ表面ガウス
を５５０〜６５０ガウス、磁石ロール８の回転数を６５
０〜７５０ｒｐｍ、スリーブ７の回転数を１２０ｒｐ
ｍ、感光ドラム４の周速を１５０ｍｍ／ｓｅｃ、感光ド
ラム４上の表面電位を暗部で５５０Ｖおよび明部で５０
Ｖ、現像バイアスとして交流に直流を重畳させ、ＳＤ間
を５５０μｍ、ＳＢ間を２００μｍ、ＳＥ間を１０００
μｍとして、装置本体の初期設置のセットアップ時にお
ける現像剤２の帯電効果を調べた。As Experimental Example 1, using the developing apparatus shown in FIG. 1 and using a stainless member as the surface member 13, an experiment was conducted under the following conditions. Magnet steel 35-50%, styrene acrylic polymer 50-70%, polypropylene 0.2-
10%, metal complex 2-5%, silicon oxide 0.5-2%, etc.
Using magnetic toner of 15 ohms, 40 on the surface of sleeve 7
0 mesh blasting is applied, sleeve surface Gauss is 550-650 Gauss, rotation speed of magnet roll 8 is 65
0 to 750 rpm, the rotation speed of the sleeve 7 is 120 rp
m, the peripheral speed of the photosensitive drum 4 is 150 mm / sec, and the surface potential on the photosensitive drum 4 is 550 V in the dark portion and 50 in the bright portion.
V, DC is superimposed on AC as development bias, 550 μm between SD, 200 μm between SB, and 1000 between SE
μm, and the charging effect of the developer 2 at the time of initial setup of the apparatus main body was examined.
【００１６】実験例２として、図２に示すように面部材
１３をステンレス性の平板状の面部材１４に替え、ドク
ターブレード９の近傍をスリーブ７と面部材１５との距
離が最小となるように配置して、この距離ＳＩ間を１０
００μｍとし、その他の条件を実験例１の条件で実験を
行った。In Experimental Example 2, as shown in FIG. 2, the surface member 13 is replaced with a stainless steel flat plate-shaped surface member 14 so that the distance between the sleeve 7 and the surface member 15 is minimized in the vicinity of the doctor blade 9. , And the distance SI is 10
The experiment was carried out under the conditions of Experimental Example 1 with the other conditions set to 00 μm.
【００１７】比較例として、図３に示すように図１にお
ける面部材１３を取り除いた従来の構成を示し、その他
の条件を実験例１の条件として実験を行った。As a comparative example, as shown in FIG. 3, a conventional structure in which the surface member 13 in FIG. 1 is removed is shown, and the experiment is conducted under the other conditions as those of the experimental example 1.
【００１８】上記実験の結果、比較例つまり従来の装置
本体の初期設置のセットアップ時において現像剤が十分
帯電して、転写材上の文字またはラインの周辺に現像剤
の飛散がない良好な転写剤を得るまでの時間が例えば１
時間かかったのに対して、実験例１および２のいずれの
場合においても装置本体の電源を入れて現像装置の空運
転を始めてから１〜２分の間に現像剤の帯電が十分なさ
れ良好な画像を転写材上に得ることができた。また、多
数枚の複写を行っても現像剤への帯電の低下が見られ
ず、鮮鋭度の高い複写像が得られた。As a result of the above experiment, in the comparative example, that is, in the conventional setting up of the initial installation of the apparatus main body, the developer is sufficiently charged so that the developer is not scattered around the characters or lines on the transfer material. Time to get
Although it took a long time, in both cases of Experimental Examples 1 and 2, the developer was sufficiently charged within 1 to 2 minutes after the power of the apparatus main body was turned on and the idle operation of the developing apparatus was started. An image could be obtained on the transfer material. Further, even when a large number of sheets were copied, the charge on the developer was not reduced, and a copy image with high sharpness was obtained.
【００１９】実験例１の面部材１３のＳＥ間および実験
例２の面部材１５のＳＩ間は、上記実験条件における最
適な条件であるが、この距離は、ＳＢ間およびケーシン
グ３内のスリーブ７上に形成された磁気ブラシの厚み等
に関連して最適条件が変化する。面部材１３、１５の特
に好適な条件としては、限定するものではないが、ＳＥ
間およびＳＩ間がＳＢ間より大きく且つケーシング３内
に形成されるスリーブ７上磁気ブラシの厚みより短い距
離であれば良い。これは、ＳＥ間およびＳＩ間がＳＢ間
より短い場合、スリーブ７と面部材１３または１５との
間に取り込む現像剤が多くなるため摩擦抵抗が大きくな
りスリーブ７の回転にトルクを生じさせて現像装置に悪
影響を与える。また、ケーシング３内に形成された磁気
ブラシの厚みよりＳＥ間およびＳＩ間の距離が長い場
合、磁気ブラシがスリーブ７と面部材１３または１５の
腹部との間に収縮するように取り込むことができないた
めに面部材を使用する効果がなくなる。また、面部材１
３および１５のスリーブ周面に対向する面の長さは、現
像剤２がスリーブ上に搬送されるに必要な最小限の開口
が確保されれば良く、面部材の長さが短いと現像剤を帯
電させる効果が小さくなる。さらに面部材１３の先端部
をスリーブ外方に向かって折り曲げまたは湾曲させるこ
とにより、スリーブ７と面部材１３との間に現像剤を取
り込み易くしてスリーブ７上に搬送している。The distance between SE of the surface member 13 of Experimental Example 1 and the distance between SI of the surface member 15 of Experimental Example 2 are optimal conditions in the above experimental conditions, but this distance is between SB and the sleeve 7 in the casing 3. The optimum conditions change in relation to the thickness of the magnetic brush formed above. The particularly preferable conditions for the surface members 13 and 15 include, but are not limited to, SE
The distance between SI and SI is larger than the distance between SB and shorter than the thickness of the magnetic brush on the sleeve 7 formed in the casing 3. This is because when SE and SI are shorter than SB, the amount of developer taken in between the sleeve 7 and the surface member 13 or 15 increases, so that frictional resistance increases and torque is generated in the rotation of the sleeve 7 to develop. The device is adversely affected. Further, when the distance between SE and SI is longer than the thickness of the magnetic brush formed in the casing 3, the magnetic brush cannot be taken in so as to contract between the sleeve 7 and the abdomen of the surface member 13 or 15. Therefore, the effect of using the surface member is lost. Also, the surface member 1
The lengths of the surfaces of the sleeves 3 and 15 that face the sleeve circumferential surface need only ensure the minimum opening required for the developer 2 to be conveyed onto the sleeve. The effect of charging the battery becomes smaller. Further, by bending or bending the tip end of the surface member 13 toward the outside of the sleeve, the developer is easily taken in between the sleeve 7 and the surface member 13 and is conveyed onto the sleeve 7.
【００２０】実施例においては、１成分系の現像剤を使
用したが２成分系現像剤を使用しても同様の効果を得る
ことができた。またスリーブ表面にショットブラスト処
理を施したものを使用したが未処理のスリーブを使用し
ても良い。In the examples, the one-component type developer was used, but the same effect could be obtained by using the two-component type developer. Further, although the one whose surface has been shot blasted is used, an untreated sleeve may be used.
【００２１】[0021]
【発明の効果】本発明の現像装置は、装置本体の初期設
置時において現像剤を帯電させるためにかかる時間を大
幅に短縮すると供に、多数枚の連続複写を行っても文字
またはラインの周辺にトナーの飛散がなく、常に鮮明な
複写画像を得ることができた。According to the developing device of the present invention, the time required for charging the developer at the time of initial installation of the main body of the device is greatly shortened, and at the same time, even if a large number of sheets are continuously copied, the periphery of characters or lines is There was no toner scattering, and a clear copy image could always be obtained.
【００２２】[0022]
【図１】 本発明による実施例を示す断面図。FIG. 1 is a sectional view showing an embodiment according to the present invention.
【図２】 本発明による実施例を示す断面図。FIG. 2 is a sectional view showing an embodiment according to the present invention.
【図３】 従来例を示す断面図。FIG. 3 is a cross-sectional view showing a conventional example.
１ 現像装置 ２ 現像剤 ３ ケーシング ４ 感光ドラム ７ スリーブ ８ 磁石ロール １３ 面部材 １４ 開口 １５ 面部材 1 Developing Device 2 Developer 3 Casing 4 Photosensitive Drum 7 Sleeve 8 Magnet Roll 13 Surface Member 14 Opening 15 Surface Member
Claims (1)
ロールの磁界により現像剤を付着させて、この現像剤の
厚みをドクターブレードにより規制した後、像担持体へ
と搬送する現像装置において、前記ドクターブレードの
手前に前記スリーブに対向してスリーブの一部を覆うよ
うに前記現像剤と接触する面部材を配置していることを
特徴とする現像装置。1. A developing device in which a developer is adhered to a sleeve containing a magnet roll by a magnetic field of the magnet roll, the thickness of the developer is regulated by a doctor blade, and then the developer is conveyed to an image carrier. A developing device, wherein a surface member facing the sleeve is provided in front of the doctor blade so as to cover a part of the sleeve and is in contact with the developer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20823593A JP3246986B2 (en) | 1993-07-30 | 1993-07-30 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20823593A JP3246986B2 (en) | 1993-07-30 | 1993-07-30 | Developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0744018A true JPH0744018A (en) | 1995-02-14 |
| JP3246986B2 JP3246986B2 (en) | 2002-01-15 |
Family
ID=16552896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20823593A Expired - Lifetime JP3246986B2 (en) | 1993-07-30 | 1993-07-30 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3246986B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19956795A1 (en) * | 1999-02-10 | 2000-08-31 | Fujitsu Ltd | Developing equipment has angle between tangent to developing roller peripheral surface at position of fixed magnet's transport magnetic pole and contact surface within defined angular range |
| JP2007078846A (en) * | 2005-09-12 | 2007-03-29 | Sharp Corp | Developing device and image forming apparatus having the same |
| JP2011102956A (en) * | 2009-10-15 | 2011-05-26 | Ricoh Co Ltd | Developing device, process cartridge, and image forming apparatus |
| US20120039638A1 (en) * | 2010-08-11 | 2012-02-16 | Samsung Electronics Co., Ltd. | Development device and image forming apparatus including development device |
| GB2554790A (en) * | 2016-07-29 | 2018-04-11 | Canon Kk | Developing apparatus and process cartridge |
| US10073374B2 (en) | 2016-07-29 | 2018-09-11 | Canon Kabushiki Kaisha | Developing apparatus having multi-part regulating member, process cartridge and electrophotographic image forming apparatus |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4451668B2 (en) | 2004-01-27 | 2010-04-14 | 株式会社リコー | Developing device, process cartridge, and image forming apparatus |
| US8071883B2 (en) | 2006-10-23 | 2011-12-06 | Ibiden Co., Ltd. | Flex-rigid wiring board including flexible substrate and non-flexible substrate and method of manufacturing the same |
| US7982135B2 (en) | 2006-10-30 | 2011-07-19 | Ibiden Co., Ltd. | Flex-rigid wiring board and method of manufacturing the same |
| JP2009258620A (en) | 2008-03-18 | 2009-11-05 | Ricoh Co Ltd | Developing device, process cartridge, and image forming apparatus |
-
1993
- 1993-07-30 JP JP20823593A patent/JP3246986B2/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19956795A1 (en) * | 1999-02-10 | 2000-08-31 | Fujitsu Ltd | Developing equipment has angle between tangent to developing roller peripheral surface at position of fixed magnet's transport magnetic pole and contact surface within defined angular range |
| DE19956795B4 (en) * | 1999-02-10 | 2012-02-09 | Fuji Xerox Co., Ltd. | processor |
| JP2007078846A (en) * | 2005-09-12 | 2007-03-29 | Sharp Corp | Developing device and image forming apparatus having the same |
| JP2011102956A (en) * | 2009-10-15 | 2011-05-26 | Ricoh Co Ltd | Developing device, process cartridge, and image forming apparatus |
| US20120039638A1 (en) * | 2010-08-11 | 2012-02-16 | Samsung Electronics Co., Ltd. | Development device and image forming apparatus including development device |
| US8670698B2 (en) * | 2010-08-11 | 2014-03-11 | Samsung Electronics Co., Ltd. | Development device having a regulation portion and image forming apparatus including development device |
| GB2554790A (en) * | 2016-07-29 | 2018-04-11 | Canon Kk | Developing apparatus and process cartridge |
| US10073374B2 (en) | 2016-07-29 | 2018-09-11 | Canon Kabushiki Kaisha | Developing apparatus having multi-part regulating member, process cartridge and electrophotographic image forming apparatus |
| US10078291B2 (en) | 2016-07-29 | 2018-09-18 | Canon Kabushiki Kaisha | Developing apparatus having a projecting regulating member and process cartridge |
| GB2554790B (en) * | 2016-07-29 | 2019-02-27 | Canon Kk | Developing apparatus and process cartridge |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3246986B2 (en) | 2002-01-15 |
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