JPH08101579A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPH08101579A JPH08101579A JP23615294A JP23615294A JPH08101579A JP H08101579 A JPH08101579 A JP H08101579A JP 23615294 A JP23615294 A JP 23615294A JP 23615294 A JP23615294 A JP 23615294A JP H08101579 A JPH08101579 A JP H08101579A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- roller
- developing roller
- developing
- developer
- 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
- Developing For Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、現像装置に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device.
【０００２】[0002]
【従来の技術】一般に乾式電子写真装置の現像装置で
は、現像室内のトナ−は、現像ロ−ラ−に当接する弾性
体ロ−ラ−の働きによって現像ロ−ラ−に供給され、さ
らに現像ロ−ラ−の働きによって感光体に供給されるこ
とにより（現像ロ−ラ−は、感光体に対し接触でも非接
触でもよい）、感光体上に潜像を形成している。また、
現像装置内では、トナ−を静電気力で搬送しているた
め、現像室内のトナ−に非帯電のトナ−が混入した場合
には、現像ロ−ラ−に対する束縛力が極端に落ち、トナ
−がブレ−ドや現像ニップ部にて空中に飛散して装置を
汚してしまい、ひいては画像品質にも大きな影響を与え
てしまう。2. Description of the Related Art Generally, in a developing device of a dry electrophotographic apparatus, a toner in a developing chamber is supplied to a developing roller by the action of an elastic roller which abuts against the developing roller, and the developing roller is further developed. The latent image is formed on the photoconductor by being supplied to the photoconductor by the action of the roller (the developing roller may be in contact with or not in contact with the photoconductor). Also,
Since the toner is conveyed by the electrostatic force in the developing device, when an uncharged toner is mixed in the toner in the developing chamber, the binding force to the developing roller is extremely reduced, and the toner is extremely weak. Are scattered in the air at the blade and the developing nip portion and stain the apparatus, which in turn greatly affects the image quality.
【０００３】[0003]
【発明が解決しようとする課題】従来の現像装置では、
トナ−の帯電は、弾性体ロ−ラ−と現像ロ−ラ−との接
触点近傍にて生じているため、特に現像立ち上がり時に
おいて、十分帯電が付与されないトナ−が発生しやす
く、その結果、装置内へトナ−が飛散してしまうという
欠点があった。In the conventional developing device,
Since the toner is charged in the vicinity of the contact point between the elastic roller and the developing roller, a toner which is not sufficiently charged is liable to be generated, especially at the start-up of development. However, there is a drawback that toner is scattered into the apparatus.
【０００４】本発明は上記に鑑みてなされたものであっ
て、特に現像開始段階における非帯電トナ−の発生、供
給を抑え、装置内へのトナ−の飛散の発生を防いだ現像
装置の提供を目的としている。The present invention has been made in view of the above, and in particular, provides a developing device which suppresses the generation and supply of the non-charged toner at the development start stage and prevents the toner from scattering in the device. It is an object.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記の目的を
達成するため、像担持体上に形成されている静電潜像へ
帯電した現像剤を搬送するための現像ロ−ラと、該現像
ロ−ラへ現像剤を供給するための現像剤供給手段とを有
する現像装置において、現像時以外は前記現像剤供給部
材を現像ロ−ラ−から離し、現像開始前に現像ロ−ラ−
と離れた位置で前記現像剤供給部材を回転させるための
制御機構を備えた構成を提案するものである。In order to achieve the above object, the present invention provides a developing roller for conveying a charged developer to an electrostatic latent image formed on an image carrier. In a developing device having a developer supplying means for supplying a developer to the developing roller, the developer supplying member is separated from the developing roller except during development, and the developing roller is provided before starting the development. −
The present invention proposes a configuration including a control mechanism for rotating the developer supply member at a position apart from the above.
【０００６】さらに、現像剤供給手段が現像ロ−ラ−と
離れた状態の時に、前記現像剤供給手段を帯電促進部材
に当接させ、現像剤供給部材と前記帯電促進部材との摩
擦により、現像開始前に現像剤をあらかじめ摩擦帯電さ
せる構成とすれば、より効果的である。Further, when the developer supplying means is separated from the developing roller, the developer supplying means is brought into contact with the charging promoting member, and the friction between the developer supplying member and the charging promoting member causes It is more effective if the developer is frictionally charged in advance before the start of development.
【０００７】さらに、帯電促進部材は、固定的に設けら
れている固定部材とすればより一層効果的である。Further, the charging promoting member is more effective if it is a fixed member provided fixedly.
【０００８】さらに、帯電促進部材は、回転ロ−ラ−と
すればより一層効果的である。Furthermore, the charging promoting member is more effective if it is a rotary roller.
【０００９】さらに、現像剤供給部材と帯電促進部材間
にバイアス電圧を加えた構成とすればより一層効果的で
ある。Further, it is more effective if a bias voltage is applied between the developer supplying member and the charging promoting member.
【００１０】また、現像剤供給手段を現像時と逆方向へ
回転させることに連動させて、現像剤供給手段を現像ロ
−ラ−から離す構成としても、より効果的である。Further, it is more effective to separate the developer supplying means from the developing roller by interlocking with the rotation of the developer supplying means in the direction opposite to that at the time of development.
【００１１】またさらに、現像ロ−ラ−から前記現像剤
供給手段を離し、前記現像剤供給手段が前記帯電促進部
材に当接するまでの駆動力を付与すると共に、前記現像
剤供給手段が帯電促進部材に当接した後には前記駆動力
を現像剤供給手段の回転を開始させるための駆動力に切
り替える構成としても、より効果的である。Further, the developer supplying means is separated from the developing roller to give a driving force until the developer supplying means comes into contact with the charging promoting member, and the developer supplying means promotes charging. It is more effective to adopt a configuration in which the driving force is switched to the driving force for starting the rotation of the developer supplying means after the contact with the member.
【００１２】[0012]
【作用】本発明によれば、現像開始前に現像ロ−ラ−か
ら離れた位置で現像剤供給部材を回転させて、非帯電ト
ナ−の発生を防ぐことができる。According to the present invention, the non-charged toner can be prevented from being generated by rotating the developer supplying member at a position away from the developing roller before starting the development.
【００１３】[0013]
【実施例】以下、本発明の実施例を添付図面を参照して
説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００１４】図７は従来の現像装置の概略構成図をあら
わしており、１は感光体、２はケ−ス、３はトナ−（一
成分非磁性乾式トナ−）、４はトナ−供給ロ−ラ−、５
はブレ−ド、６は現像ロ−ラ−である。FIG. 7 is a schematic diagram showing the construction of a conventional developing device. 1 is a photoconductor, 2 is a case, 3 is a toner (one-component non-magnetic dry toner), 4 is a toner supply roll. -La-5
Is a blade, and 6 is a developing roller.
【００１５】ケ−ス２内のトナ−３は、弾性体で形成さ
れたトナ−供給ロ−ラ−４の働きにより現像ロ−ラ−６
に導かれる。そして、トナ−３がトナ−供給ロ−ラ−４
と現像ロ−ラ−６との接触部周辺で帯電され、その帯電
されたトナ−３は、静電力により現像ロ−ラ−６に捕捉
されて現像ロ−ラ−６とブレ−ド５との当接部に導か
れ、薄層化された後、感光体１に接触することで現像さ
れる。この場合、トナ−供給ロ−ラ−４と現像ロ−ラ−
６とは常に接触しており、トナ−供給ロ−ラ−４は正方
向（時計回り方向）へ、現像ロ−ラ−６は逆方向（反時
計回り方向）へ、回転を行なっている。The toner 3 in the case 2 is developed by the toner supply roller 4 formed of an elastic body.
Be led to. Toner-3 is the toner supply roller-4.
Is charged around the contact portion between the developing roller 6 and the developing roller 6, and the charged toner 3 is captured by the developing roller 6 by an electrostatic force and the developing roller 6 and the blade 5 After being guided to the abutting portion of (1) and being made a thin layer, it is developed by coming into contact with the photoconductor 1. In this case, the toner supply roller-4 and the developing roller-4
6, the toner supply roller 4 rotates in the forward direction (clockwise direction), and the developing roller 6 rotates in the reverse direction (counterclockwise direction).
【００１６】図１は本発明の一実施例（第１実施例）の
概略構成図をあらわしており、１〜３、５、６は図７に
おけるものと同じものをあらわしており、７はトナ−供
給帯電ロ−ラ−である。FIG. 1 shows a schematic configuration diagram of an embodiment (first embodiment) of the present invention, 1 to 3, 5 and 6 show the same as those in FIG. 7, and 7 is a toner. -Supply charging roller.
【００１７】図１の実施例においても、現像ロ−ラ−６
とトナ−供給帯電ロ−ラ−７の現像中の動きは図７にお
ける従来の動きと同様であるが、図１では、現像動作に
入る前に、トナ−供給帯電ロ−ラ−７が、停止したまま
の現像ロ−ラ−６から離れ、現像開始前（特に直前）
に、逆方向へ回転を始める様に、制御機構により、制御
を行なっている。この時、現像ロ−ラ−６は停止したま
まなので、不必要にトナ−を感光体１方向へ搬送するこ
とはない。なお、トナ−供給帯電ロ−ラ−７の回転方向
の切り替えに連動させて、現像ロ−ラ−６へのトナ−供
給帯電ロ−ラ−７の接離を行なわせてもよい。Also in the embodiment shown in FIG. 1, the developing roller 6 is used.
While the movement of the toner supply charging roller 7 during development is similar to the conventional movement in FIG. 7, in FIG. 1, the toner supply charging roller 7 is Before the start of development (especially immediately before), leaving the development roller 6 which was stopped
In addition, the control mechanism performs control so that the rotation starts in the opposite direction. At this time, since the developing roller 6 is still stopped, the toner is not unnecessarily conveyed toward the photoconductor 1. Incidentally, the toner supply charging roller 7 may be brought into contact with or separated from the developing roller 6 in association with the switching of the rotation direction of the toner supplying charging roller 7.
【００１８】図１では、ケ−ス２内のトナ−だまりのな
かでトナ−供給帯電ロ−ラ−７を回転させることによ
り、周辺のトナ−を帯電し、その帯電トナ−を現像ロ−
ラ−６近傍に集めている。そして現像ロ−ラ−６周辺の
トナ−が十分帯電した後、トナ−供給帯電ロ−ラ−７を
現像ロ−ラ−６に当接し、通常の現像動作を開始する様
制御している。このような構成とすることにより、現像
ロ−ラ−６で搬送されるトナ−は現像動作開始時点にお
いて確実にかつ十分に帯電されており、現像開始時点で
の装置への非帯電トナ−の飛散を抑えることができる。In FIG. 1, the toner supply charging roller 7 is rotated in the toner reservoir in the case 2 to charge the peripheral toner, and the charged toner is developed in the developing roller.
Collected near La-6. Then, after the toner around the developing roller 6 is sufficiently charged, the toner supplying charging roller 7 is brought into contact with the developing roller 6 so that a normal developing operation is started. With such a structure, the toner conveyed by the developing roller 6 is surely and sufficiently charged at the start of the developing operation, and the toner of the uncharged toner to the apparatus at the start of the developing operation is protected. The scattering can be suppressed.
【００１９】図２は本発明の他の実施例（第２実施例）
の概略構成図をあらわしており、８は帯電促進部材であ
る。FIG. 2 shows another embodiment (second embodiment) of the present invention.
8 is a schematic configuration diagram of No. 8, and 8 is a charge promoting member.
【００２０】図２では、さらに予備帯電を促進した例を
あらわしている。図２の実施例においても、現像開始前
に現像ロ−ラ−６からトナ−供給帯電ロ−ラ−７が離れ
るまでは図１の第１実施例と同様であるが、第２実施例
の場合、現像ロ−ラ−６から離れたトナ−供給帯電ロ−
ラ−７を、回転等を行なわない固定された状態の、板状
の帯電促進部材８に対し圧着させている。さらに圧着
後、圧着した状態でトナ−供給帯電ロ−ラ−７を回転さ
せる制御を行なうことにより、トナ−は供給帯電ロ−ラ
−７と帯電促進部材８間に導かれ、その相対運動で摩擦
帯電される。このような構成とすることにより、トナ−
の帯電を短時間で行なうことが出来るので現像を早く開
始できる。FIG. 2 shows an example in which preliminary charging is further promoted. In the embodiment of FIG. 2 as well, the procedure is the same as that of the first embodiment of FIG. 1 until the toner supply charging roller 7 is separated from the developing roller 6 before the development is started. In this case, the toner supply charging roller separated from the developing roller 6
The lath 7 is pressure-bonded to the plate-shaped electrification promoting member 8 in a fixed state that is not rotated. Further, after the pressure bonding, the toner supplying charging roller 7 is controlled to rotate in the pressure bonded state, so that the toner is guided between the supplying charging roller 7 and the charging promoting member 8 and the relative movement thereof is performed. It is frictionally charged. With such a configuration, the toner
Can be charged in a short time, so that development can be started quickly.
【００２１】図３は本発明の他の実施例（第３実施例）
の概略構成図をあらわしており、９は帯電促進ロ−ラ−
である。FIG. 3 shows another embodiment of the present invention (third embodiment).
9 is a schematic configuration diagram of a charging acceleration roller.
Is.
【００２２】図３では図２おける、固定された状態の板
状の帯電促進部材８を、ロ−ラ−９に置き換えた構成を
あらわしている。このように、帯電促進部材をロ−ラ−
とすることにより、トナ−の帯電を短時間で行なうこと
が出来ると共に、帯電を細かくコントロ−ルすることが
できる。FIG. 3 shows a configuration in which the plate-shaped charging promoting member 8 in the fixed state in FIG. 2 is replaced with a roller 9. In this way, the charging promoting member is rolled
By this, the toner can be charged in a short time, and the charging can be finely controlled.
【００２３】図２における第２実施例、図３における第
３実施例の構成であれば、帯電を速やかに行なえるの
で、現像前の待機時間を短縮することができる。さらに
トナ−供給帯電ロ−ラ−７と帯電促進部材８、９との間
にバイアス電圧加圧手段により（図示せず）バイアス電
圧を加えれば、帯電をさらに促進し、待機時間をより短
縮することができる。With the configuration of the second embodiment shown in FIG. 2 and the third embodiment shown in FIG. 3, charging can be carried out quickly, so that the waiting time before development can be shortened. Further, if a bias voltage (not shown) is applied between the toner supply charging roller 7 and the charging promoting members 8 and 9 by a bias voltage pressurizing means, the charging is further promoted and the waiting time is further shortened. be able to.
【００２４】図４及び図５は本発明を達成するための一
実施例（第４実施例）の概略構成図であり、図４は正面
図、図５は側面図をあらわしており、１０は従動ギヤ、
１１は駆動ギヤ、１２はスリップ機構である。4 and 5 are schematic configuration diagrams of an embodiment (fourth embodiment) for achieving the present invention. FIG. 4 is a front view, FIG. 5 is a side view, and 10 is Driven gear,
Reference numeral 11 is a drive gear, and 12 is a slip mechanism.
【００２５】図４及び図５では、現像ロ−ラ−６からト
ナ−供給帯電ロ−ラ−７を離すための退避機構の一例を
あらわしている。図４及び図５に記載の実施例の場合、
トナ−供給帯電ロ−ラ−７の軸には従動ギヤ１０が固定
されており、従動ギヤ１０は駆動源（図示せず）からの
駆動力を伝達する駆動ギヤ１１と噛み合う様に設けられ
ている。4 and 5 show an example of a retracting mechanism for separating the toner supplying charging roller 7 from the developing roller 6. In the case of the embodiment described in FIGS. 4 and 5,
A driven gear 10 is fixed to the shaft of the toner supply charging roller 7, and the driven gear 10 is provided so as to mesh with a drive gear 11 that transmits a driving force from a drive source (not shown). There is.
【００２６】このような構成のもと、トナ−供給帯電ロ
−ラ−７が現像ロ−ラ−６に圧接している状態の時に、
駆動ギヤ１１が逆方向（反時計回り方向）へ回転を始め
るとこれに噛み合っている従動ギヤ１０は、駆動ギヤ１
１を中心として逆方向へ移動し、第２実施例における板
状の帯電促進部材８や、第３実施例における帯電促進ロ
−ラ−９等に当接した後、正方向（時計回り方向）へ回
転を始める。現像ロ−ラ−６、板状の帯電促進部材８、
帯電促進ロ−ラ−９に対する圧着力は、従動ギヤ１０と
トナ−供給帯電ロ−ラ−７との間に設けたスリップ機構
１２の回転抵抗の働きを利用して制御している。With this structure, when the toner supply charging roller 7 is in pressure contact with the developing roller 6,
When the drive gear 11 starts rotating in the opposite direction (counterclockwise direction), the driven gear 10 meshed with the drive gear 11 is
After moving in the opposite direction about 1 and contacting the plate-shaped charging promotion member 8 in the second embodiment, the charging promotion roller 9 in the third embodiment, etc., the forward direction (clockwise direction) Begins to rotate. A developing roller 6, a plate-shaped charge promoting member 8,
The pressing force applied to the charging promotion roller 9 is controlled by utilizing the rotation resistance of the slip mechanism 12 provided between the driven gear 10 and the toner supply charging roller 7.
【００２７】図６は、本発明を達成するための他の実施
例（第５実施例）の概略構成図であり、１３は固定壁、
１４は板ばねをあらわしている。FIG. 6 is a schematic diagram of another embodiment (fifth embodiment) for achieving the present invention, in which 13 is a fixed wall,
Reference numeral 14 represents a leaf spring.
【００２８】図６にあらわしている構成は、図５にあら
わしている構成をより簡単にしたものである。図６の実
施例では、トナ−供給帯電ロ−ラ−７の一部（例えば軸
部）は、板ばね１４と固定壁１３によって挾まれてお
り、トナ−供給帯電ロ−ラ−７の一部は、板ばね１４の
付勢力により、固定壁１３に押し当てられている。この
場合、板ばね１４との摩擦力を固定壁１３との摩擦力よ
りも小さくすれば、トナ−供給帯電ロ−ラ−７は、図５
における第４実施例と同様の動作を行なう。この際に、
現像ロ−ラ−６、板状の帯電促進部材８、帯電促進ロ−
ラ−９に対する圧着力を決定するのは、トナ−供給帯電
ロ−ラ−７の一部とばね１４と固定壁１３との間の摩擦
力であり、この摩擦力を適宜調整しておけばよく、簡単
な機構で済む。The configuration shown in FIG. 6 is a simplified version of the configuration shown in FIG. In the embodiment of FIG. 6, a part (for example, a shaft portion) of the toner supplying charging roller 7 is sandwiched by the leaf spring 14 and the fixed wall 13, and one part of the toner supplying charging roller 7 is provided. The portion is pressed against the fixed wall 13 by the biasing force of the leaf spring 14. In this case, if the frictional force with the leaf spring 14 is made smaller than the frictional force with the fixed wall 13, the toner supply charging roller 7 can be operated as shown in FIG.
The same operation as that of the fourth embodiment in FIG. At this time,
Developing roller 6, plate-shaped charging promoting member 8, charging promoting roller
It is the frictional force between the part of the toner-supplied charging roller 7, the spring 14 and the fixed wall 13 that determines the crimping force against the roller 9. If this frictional force is adjusted appropriately. Good and simple mechanism.
【００２９】[0029]
【発明の効果】請求項１の現像装置によれば、現像開始
段階における非帯電トナ−の発生、供給を抑え、装置内
へのトナ−の飛散を防いだ現像装置を提供することがで
きる。According to the developing device of the first aspect, it is possible to provide a developing device which suppresses the generation and supply of the non-charged toner at the development start stage and prevents the toner from scattering in the device.
【００３０】請求項２の現像装置によれば、さらに、現
像開始までの時間を短くすることができる。According to the developing device of the second aspect, the time until the start of development can be further shortened.
【００３１】請求項３の現像装置によれば、簡単な構成
で、現像開始までの時間を短くすることができる。According to the developing device of the third aspect, the time until the start of development can be shortened with a simple structure.
【００３２】請求項４の現像装置によれば、より、現像
開始までの時間を短くすることができと共に、帯電を細
かくコントロ−ルすることができる。According to the developing device of the fourth aspect, the time until the start of development can be shortened and the charging can be finely controlled.
【００３３】請求項５の現像装置によれば、より一層、
現像開始までの時間を短くすることができる。According to the developing device of claim 5, further,
The time until the start of development can be shortened.
【００３４】請求項６の現像装置によれば、非常に簡単
な構成で、現像剤供給手段を現像ロ−ラ−から離すこと
ができる。According to the developing device of the sixth aspect, the developer supplying means can be separated from the developing roller with a very simple structure.
【００３５】請求項７の現像装置によれば、現像剤供給
手段の動作制御を、簡単な構成で行なうことができる。According to the developing device of the seventh aspect, the operation control of the developer supplying means can be performed with a simple structure.
【図１】本発明の一実施例（第１実施例）の概略構成図
をあらわしている。FIG. 1 shows a schematic configuration diagram of an embodiment (first embodiment) of the present invention.
【図２】本発明の他の実施例（第２実施例）の概略構成
図をあらわしている。FIG. 2 shows a schematic configuration diagram of another embodiment (second embodiment) of the present invention.
【図３】本発明の他の実施例（第３実施例）の概略構成
図をあらわしている。FIG. 3 shows a schematic configuration diagram of another embodiment (third embodiment) of the present invention.
【図４】本発明を達成するための一実施例（第４実施
例）の概略構成図の正面図をあらわしている。FIG. 4 shows a front view of a schematic configuration diagram of an embodiment (fourth embodiment) for achieving the present invention.
【図５】図４における側面図をあらわしている。5 is a side view of FIG. 4. FIG.
【図６】本発明を達成するための他の実施例（第５実施
例）の概略構成図をあらわしている。FIG. 6 shows a schematic configuration diagram of another embodiment (fifth embodiment) for achieving the present invention.
【図７】従来例の概略構成図をあらわしている。FIG. 7 shows a schematic configuration diagram of a conventional example.
１ 感光体 ３ トナ− ４ トナ−供給ロ−ラ− ６ 現像ロ−ラ− ７ トナ−供給帯電ロ−ラ− ８ 帯電促進部材 ９ 帯電促進ロ−ラ− １０ 従動ギヤ １１ 駆動ギヤ １２ スリップ機構 １３ 固定壁 １４ 板ばね 1 Photoreceptor 3 Toner 4 Toner Supply Roller 6 Development Roller 7 Toner Supply Charging Roller 8 Charging Acceleration Member 9 Charging Acceleration Roller 10 Driven Gear 11 Drive Gear 12 Slip Mechanism 13 Fixed wall 14 Leaf spring
Claims (7)
帯電した現像剤を搬送するための現像ロ−ラと、該現像
ロ−ラへ現像剤を供給するための現像剤供給手段とを有
する現像装置において、現像時以外は前記現像剤供給部
材を現像ロ−ラ−から離し、現像開始前に現像ロ−ラ−
と離れた位置で前記現像剤供給部材を回転させるための
制御機構を備えたことを特徴とする現像装置。1. A developing roller for conveying a charged developer to an electrostatic latent image formed on an image carrier, and a developer supplying for supplying the developer to the developing roller. And a developing roller which is separated from the developing roller at a time other than the time of development and which is before the start of development.
And a control mechanism for rotating the developer supply member at a position away from the developing device.
れた状態の時に、前記現像剤供給手段を帯電促進部材に
当接させ、現像剤供給部材と前記帯電促進部材との摩擦
により、現像開始前に現像剤をあらかじめ摩擦帯電させ
ることを特徴とする請求項１項に記載の現像装置。2. When the developer supplying means is separated from the developing roller, the developer supplying means is brought into contact with the charging promoting member, and friction is generated between the developer supplying member and the charging promoting member. 2. The developing device according to claim 1, wherein the developer is triboelectrically charged in advance before the development is started.
ている固定部材であることを特徴とする請求項２項に記
載の現像装置。3. The developing device according to claim 2, wherein the charging promoting member is a fixed member that is fixedly provided.
ることを特徴とする請求項２項に記載の現像装置。4. The developing device according to claim 2, wherein the charging promotion member is a rotary roller.
間にバイアス電圧を加えたことを特徴とする請求項２項
に記載の現像装置。5. The developing device according to claim 2, wherein a bias voltage is applied between the developer supply member and the charging promotion member.
回転させることに連動させて、現像剤供給手段を現像ロ
−ラ−から離すことを特徴とする請求項１項に記載の現
像装置。6. The developing device according to claim 1, wherein the developer supplying device is separated from the developing roller by interlocking with rotating the developer supplying device in a direction opposite to that at the time of development. apparatus.
段を離し、前記現像剤供給手段が前記帯電促進部材に当
接するまでの駆動力を付与すると共に、前記現像剤供給
手段が帯電促進部材に当接した後には前記駆動力を現像
剤供給手段の回転を開始させるための駆動力に切り替え
ることを特徴とする請求項２項に記載の現像装置。7. The developer supply means is separated from the developing roller to apply a driving force until the developer supply means comes into contact with the charging promotion member, and the developer supply means promotes charging. The developing device according to claim 2, wherein the driving force is switched to a driving force for starting the rotation of the developer supplying unit after the contact with the member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23615294A JP3259804B2 (en) | 1994-09-30 | 1994-09-30 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23615294A JP3259804B2 (en) | 1994-09-30 | 1994-09-30 | Developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08101579A true JPH08101579A (en) | 1996-04-16 |
| JP3259804B2 JP3259804B2 (en) | 2002-02-25 |
Family
ID=16996539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23615294A Expired - Fee Related JP3259804B2 (en) | 1994-09-30 | 1994-09-30 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3259804B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007065064A (en) * | 2005-08-29 | 2007-03-15 | Ricoh Co Ltd | Image forming apparatus |
| JP2007286399A (en) * | 2006-04-18 | 2007-11-01 | Konica Minolta Business Technologies Inc | Developing device and image forming apparatus |
| JP2011070228A (en) * | 2007-06-29 | 2011-04-07 | Brother Industries Ltd | Developer unit, process device, and image forming apparatus |
| JP2013164553A (en) * | 2012-02-13 | 2013-08-22 | Oki Data Corp | Developing device and image forming apparatus |
-
1994
- 1994-09-30 JP JP23615294A patent/JP3259804B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007065064A (en) * | 2005-08-29 | 2007-03-15 | Ricoh Co Ltd | Image forming apparatus |
| JP2007286399A (en) * | 2006-04-18 | 2007-11-01 | Konica Minolta Business Technologies Inc | Developing device and image forming apparatus |
| JP2011070228A (en) * | 2007-06-29 | 2011-04-07 | Brother Industries Ltd | Developer unit, process device, and image forming apparatus |
| JP2013164553A (en) * | 2012-02-13 | 2013-08-22 | Oki Data Corp | Developing device and image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3259804B2 (en) | 2002-02-25 |
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