JPH0643742A - Non-magnetic one-component developing device - Google Patents
Non-magnetic one-component developing deviceInfo
- Publication number
- JPH0643742A JPH0643742A JP3200035A JP20003591A JPH0643742A JP H0643742 A JPH0643742 A JP H0643742A JP 3200035 A JP3200035 A JP 3200035A JP 20003591 A JP20003591 A JP 20003591A JP H0643742 A JPH0643742 A JP H0643742A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- supply member
- developer
- carrier
- electric field
- 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】本発明は電子写真複写機、プリン
タ等において静電潜像保持体上に形成された静電潜像を
非磁性一成分現像剤によって、可視像にする非磁性一成
分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 an electrophotographic copying machine, a printer, etc., which converts a latent electrostatic image formed on a latent electrostatic image bearing member into a visible image by a nonmagnetic one-component developer. The present invention relates to a component developing device.
【０００２】[0002]
【従来の技術】従来、この種の現像装置としては特開昭
４７ー１３０８８号公報や特開昭５３ー１６７３４１号
公報等に開示されるものがある。これらは、非磁性一成
分の現像剤を現像剤担持体の表面に薄層形成し、この現
像剤担持体によって潜像保持体上に形成された静電潜像
を可視像に現像する非磁性一成分現像装置である。この
ような非磁性一成分現像装置に於いては、トナー貯蔵部
に蓄えられたトナーはロール状に成形された供給部材に
より上記現像剤担持体上に供給される。現像剤担持体上
のトナーは該担持体上に圧接されたロール状またはブレ
ード状の現像剤規制部材により所定の現像剤層厚に規制
されると共に電荷が付与された後、潜像担持体上に供給
されて現像に供せられ、可視像が得られる。2. Description of the Related Art Conventionally, as developing devices of this type, there are those disclosed in JP-A-47-13088 and JP-A-53-167341. These are non-magnetic one-component developers that form a thin layer on the surface of a developer carrier, and develop the electrostatic latent image formed on the latent image carrier by the developer carrier into a visible image. It is a magnetic one-component developing device. In such a non-magnetic one-component developing device, the toner stored in the toner storage unit is supplied onto the developer carrying member by a supply member formed into a roll shape. The toner on the developer carrying member is regulated to a predetermined developer layer thickness by a roll-like or blade-like developer regulating member that is pressed against the carrying member, and is given an electric charge. To be developed and a visible image is obtained.
【０００３】このような非磁性一成分の現像剤を用いた
現像装置ではトナー貯蔵部のトナーをいかに安定して現
像剤担持体上に供給するかが重要となる。しかしなが
ら、非磁性一成分現像装置に用いられるトナーは磁性粉
を有しないため磁力による供給手段を用いることができ
ず、担持体への付着はファンデルワールス力およびクー
ロン力による付着力が支配的となり、充分な供給を安定
して行うことができない。たとえば連続した高濃度の原
稿を複写する場合、担持体上のトナーは多量に潜像保持
体に供せられる。ところが、上述のように供給ロールに
よる担持体へのトナーの供給が充分行えないため担持体
が２回転目以降では潜像保持体上のトナー量が急激に低
下し、結果として高濃度の画像が再現されないという不
具合が生じる。In such a developing device using a non-magnetic one-component developer, it is important to stably supply the toner in the toner storage portion onto the developer carrying member. However, since the toner used in the non-magnetic one-component developing device does not have magnetic powder, it is not possible to use a supplying means by magnetic force, and the adhesion to the carrier is dominated by the Van der Waals force and the Coulomb force. , Sufficient supply cannot be performed stably. For example, when copying a continuous high-density original, a large amount of toner on the carrier is supplied to the latent image carrier. However, as described above, since the toner cannot be sufficiently supplied to the carrier by the supply roll, the amount of toner on the latent image carrier sharply decreases after the second rotation of the carrier, resulting in a high-density image. The problem that it is not reproduced occurs.
【０００４】これを解消するため例えば特開昭特開昭６
０−１４０２７５号公報や特開昭６１ー１１２１７３号
公報に記載された現像方式では現像剤担持体と供給部材
の間にトナーが担持体へ吸引されるような電界を発生さ
せるための電圧が印加されている。本装置によれば、ト
ナー貯蔵部に蓄えられたトナーは現像剤担持体と供給ロ
ールの間に生じる電界によって充分な量が現像剤担持体
に供給されるため連続した高濃度の画像再現が可能とな
る。しかしながら、このような装置に於いては正規の極
性に帯電したトナーは現像剤担持体に供されるが逆の極
性に帯電したトナーは供給部材の回転とともに供給部材
に蓄積され、現像剤担持体と供給部材の間に生じている
電界を減少させる作用をする。To solve this, for example, Japanese Patent Laid-Open No. Sho 6
In the developing method described in JP-A No. 0-140275 and JP-A No. 61-112173, a voltage is applied between the developer carrier and the supply member to generate an electric field that attracts toner to the carrier. Has been done. According to this device, a sufficient amount of toner stored in the toner storage unit is supplied to the developer carrier by the electric field generated between the developer carrier and the supply roll, so that continuous high-density image reproduction is possible. Becomes However, in such an apparatus, the toner charged to the regular polarity is supplied to the developer carrier, but the toner charged to the opposite polarity is accumulated in the supply member as the supply member rotates, and the developer carrier is And acts to reduce the electric field generated between the supply member.
【０００５】これを解消するために特願平２−１４３６
９３には電圧を印加した導電部材を供給部材に近接また
は圧接させ供給部材上に蓄積した逆極性のトナーを機械
的、及び電気的に剥離するための剥離部材を設けた現像
装置も提案されている。このような装置に於いては剥離
部材を圧接させたことによる駆動トルクの上昇、振動と
いう問題や、剥離部材及び該部材に電圧を印加するため
の電圧印加手段を必要とし装置の構成が複雑になってし
まうという欠点がある。To solve this, Japanese Patent Application No. 2-1436
In 93, there is also proposed a developing device provided with a peeling member for mechanically and electrically peeling a toner having a reverse polarity accumulated on the supply member by bringing a conductive member to which a voltage is applied close to or in pressure contact with the supply member. There is. In such an apparatus, driving torque is increased and vibration is caused by pressing the peeling member, and the peeling member and a voltage applying means for applying a voltage to the member are required, and the structure of the apparatus becomes complicated. It has the drawback of becoming
【０００６】また特公平２ー３９７９０号報には担持体
に近接し、担持体による現像剤搬送方向下流側に配置さ
れた導電性部材と担持体との間に、担持体と潜像保持体
の間に生ずる電界の方向とは逆方向の電界を生じさせ担
持体への正規に帯電したのトナー蓄積を防止する方法が
開示されている。しかしながらこのような構成において
は担持体の回転とともに逆極性のトナーが担持体に蓄積
され背景部かぶり、トナー飛散を生じてしまい、また、
本発明に用いた構成の非磁性一成分現像装置に適用しよ
うとした場合、トナーが導電部材に転移するのに必要な
電界を得るための導電性部材の設定に高い精度が必要と
なり、また該部材に電圧を印加するための高圧電圧印加
手段を必要とし装置の構成が複雑になってしまう。In Japanese Patent Publication No. 2-39790, a carrier and a latent image carrier are provided between a carrier and a conductive member which is disposed in the vicinity of the carrier and on the downstream side in the developer conveying direction by the carrier. There is disclosed a method of preventing the accumulation of the normally charged toner on the carrier by generating an electric field in the direction opposite to the direction of the electric field generated during the period. However, in such a structure, toner of opposite polarity is accumulated on the carrier as the carrier rotates, causing fog in the background and toner scattering.
When the present invention is applied to a non-magnetic one-component developing device having the configuration used in the present invention, high precision is required for setting the conductive member to obtain the electric field necessary for transferring the toner to the conductive member. A high voltage applying means for applying a voltage to the member is required, and the structure of the device becomes complicated.
【０００７】[0007]
【発明が解決しようとする課題】本発明の目的は、上記
従来技術の課題を鑑みて簡単な構成で上述の現像装置に
於ける問題点を解消し、常に供給部材により充分な量の
トナーを現像剤担持体に供し、長期にわたり均一で安定
した濃度の複写画像を得ることができる非磁性一成分現
像装置を供給することである。SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems in the developing device with a simple structure in view of the above problems of the prior art, and to always supply a sufficient amount of toner by the supply member. It is an object of the present invention to provide a non-magnetic one-component developing device which can be used as a developer carrier to obtain a copy image having a uniform and stable density for a long period of time.
【０００８】[0008]
【課題を解決するための手段】本発明は、現像剤を担持
する現像剤担持体と該現像剤担持体に対してトナー貯蔵
部に蓄えられた現像剤の供給を行う供給部材を有し、現
像動作中には、該供給部材に、正規に帯電している現像
剤が前記担持体ロールに吸引される方向の電界を生じる
ような電圧を印加するための電圧印加手段を有する現像
装置において、静電潜像現像終了後、該供給部材の回転
が停止する前の一定時間、逆極性に帯電している現像剤
が前記担持体ロールに吸引される方向の電界を生じさせ
るべく前記電圧印加手段の極性を反転させることを特徴
とするものである。このように一連の現像課程の中に担
持体ロールと供給部材間の電界を逆転させるという動作
を導入することにより簡単な構成で長期にわたって良好
なコピー画質を得ることができるThe present invention has a developer carrying member carrying a developer and a supply member for supplying the developer stored in the toner storage unit to the developer carrying member, In a developing device having a voltage applying means for applying a voltage to the supply member so as to generate an electric field in the direction in which the normally charged developer is attracted to the carrier roll during the developing operation, After the completion of the electrostatic latent image development, the voltage application means for generating an electric field in the direction in which the developer charged with the opposite polarity is attracted to the carrier roll for a certain period of time before the rotation of the supply member is stopped. It is characterized by reversing the polarity of. In this way, by introducing the operation of reversing the electric field between the carrier roll and the supply member in the series of development steps, it is possible to obtain a good copy image quality for a long period with a simple structure.
【０００９】さらには、供給部材に逆極性に帯電してい
る現像剤が前記担持体ロールに吸引される方向の電界を
生じるような電圧を印加する時間は、該供給部材が１回
転ないしは１０回転する間が効果的であり、またその間
は逆極性トナーが担持体によって現像領域に搬送されな
いように現像剤担持体ロールは停止していることが望ま
しい。Furthermore, the time for applying a voltage to the supply member so as to generate an electric field in the direction in which the developer charged with the opposite polarity is attracted to the carrier roll is 1 rotation or 10 rotations of the supply member. It is desirable that the developer carrier roll is stopped so that the opposite polarity toner is not conveyed to the developing area by the carrier during this period.
【００１０】[0010]
【作用】本構成によれば、トナー貯蔵部のトナーは供給
部材の回転により供給部材の周囲に搬送される。現像時
には供給部材に担持体ロールに対し現像剤と同極性にな
る電圧が印加されているので、正規に帯電しているトナ
ーは現像剤担持体と供給部材間の電界により、充分な量
のトナーが担持体に供給されるので高濃度の原稿を良好
に再現できる。一方このとき、逆極性に帯電したトナー
は供給部材に蓄積され現像剤担持体と供給部材間の電界
を減少させ電界による担持体へのトナー供給機能を低下
させる作用をするが、現像終了時の供給部材の回転が停
止する前の一定時間、供給部材には逆極性のトナーが担
持体ロールに引き寄せられるような電界を発生する電圧
が印加されるので、供給部材に蓄積された逆極性トナー
は電界によるクーロン力、及び機械的な微少振動、摺擦
力により供給部材より剥離され、供給部材は初期の性能
を回復する。逆の電圧が印加されている時間は供給部材
が１回転する時間以上であることが好ましい。逆電圧印
加時間がこれ以下のときは供給部材の一部に逆極性のト
ナーが蓄積されたままの状態が生じ、現像剤担持体への
トナー供給にむらが生じるためである。このとき、現像
剤担持体には逆極性に帯電しているトナーが供給される
が、現像剤担持体の動作を停止させることにより逆極性
トナーの搬送を防止できトナー層形成不良によるトナー
飛散や、潜像保持体の汚染を防止できる。また供給部材
の撹拌力により剥離された逆極性トナーは現像装置内に
拡散されるので次の現像に支障をきたさない。逆極性ト
ナーを拡散させるためには逆電圧印加時間は長いほど効
果があるが供給部材１０回転以上ではそれほど効果に差
が得られない。According to this structure, the toner in the toner storage section is conveyed around the supply member by the rotation of the supply member. At the time of development, a voltage having the same polarity as that of the developer is applied to the supply member roller at the time of development.Therefore, the toner which is normally charged has a sufficient amount of toner due to the electric field between the developer support member and the supply member. Is supplied to the carrier so that a high-concentration original can be reproduced well. On the other hand, at this time, the toner charged to the opposite polarity is accumulated in the supply member and acts to reduce the electric field between the developer carrying member and the supply member to lower the toner supplying function to the carrying member by the electric field. For a certain period of time before the rotation of the supply member is stopped, a voltage that generates an electric field that attracts the opposite polarity toner to the carrier roll is applied to the supply member, so that the opposite polarity toner accumulated in the supply member is The Coulomb force due to the electric field, mechanical microvibration, and rubbing force cause separation from the supply member, and the supply member recovers its initial performance. It is preferable that the time when the reverse voltage is applied is longer than the time when the supply member makes one rotation. This is because when the reverse voltage application time is shorter than this, a state in which the toner of the opposite polarity is still accumulated in a part of the supply member and the toner is unevenly supplied to the developer carrier. At this time, the toner having the opposite polarity is supplied to the developer carrying member, but by stopping the operation of the developer carrying member, it is possible to prevent the reverse polarity toner from being conveyed, and the toner scattering or the toner scattering due to the defective formation of the toner layer occurs. The contamination of the latent image holder can be prevented. Further, since the reverse polarity toner peeled off by the stirring force of the supply member is diffused in the developing device, it does not hinder the next development. In order to diffuse the opposite polarity toner, the longer the reverse voltage application time is, the more effective it is, but the effect is not so different when the supply member is rotated 10 times or more.
【００１１】[0011]
（実施例１）第１図は、本発明の実施例として用いた非
磁性一成分現像装置の模式図である。静電潜像保持体と
して正帯電の有機感光体を用い、その帯電電位は画像部
で４００ｖ、非画像部で１００ｖとなるようにした。現
像剤担持体１は比抵抗が１０7Ωｃｍのフェノール樹脂
で表面が被覆されており被覆の厚さは１ｍｍである。フ
ェノール樹脂の表面はサンドペーパー等により軸方向に
研磨されており中心線平均粗さで０．３〜０．４μｍと
した。供給部材２は金属シャフト表面に平均気孔径が５
００μｍである発泡ウレタンを被覆した構成であり、電
極効果を得るためウレタンを発泡前にカーボンを分散し
比抵抗を１０5Ωｃｍとしている。これら現像剤担自体
と供給部材２は干渉量が１ｍｍとなるように圧接され互
いに逆方向に回転するようになっている。また、トナー
３としてはスチレンアクリル樹脂を用い少量の疎水性シ
リカを添加、負極性となるものを用いたので供給部材の
現像剤担持体に対する電位差は第２図に示すようにし
た。層規制部材４は板ばね材の現像剤担持体に当接する
部分が軟弾性体からなる構成で担持体に対し線圧が１０
０ｇ／ｃｍで圧接している。軟弾性体としては厚さ１ｍ
ｍのシリコンゴムを用いた。上記の構成からなる現像装
置を静電潜像保持体と現像剤担持体の間隙が２００μｍ
となるように保持し、現像剤担持体には２５０ｖのＤＣ
電圧にＶｐｐが２０００ｖ、で周波数が３ｋＨｚなるＡ
Ｃ電圧を重畳したものをバイアスとして印加し複写テス
トを行ったところ３０、０００枚にわたって濃度が一定
した良好なコピーが得られた。(Embodiment 1) FIG. 1 is a schematic view of a non-magnetic one-component developing device used as an embodiment of the present invention. A positively charged organic photoconductor was used as the electrostatic latent image carrier, and the charging potential thereof was set to 400 v in the image portion and 100 v in the non-image portion. The surface of the developer carrying member 1 is coated with a phenol resin having a specific resistance of 10 7 Ωcm, and the coating thickness is 1 mm. The surface of the phenol resin was polished in the axial direction by sandpaper or the like, and the center line average roughness was set to 0.3 to 0.4 μm. The supply member 2 has an average pore diameter of 5 on the surface of the metal shaft.
It has a structure in which urethane foam having a thickness of 00 μm is coated, and in order to obtain an electrode effect, urethane is dispersed with carbon before foaming to have a specific resistance of 10 5 Ωcm. The developer carrier itself and the supply member 2 are pressed against each other so that the amount of interference becomes 1 mm, and rotate in opposite directions. As the toner 3, styrene-acrylic resin was used and a small amount of hydrophobic silica was added to give a negative polarity. Therefore, the potential difference between the supply member and the developer carrying member was set as shown in FIG. The layer restricting member 4 has a structure in which the portion of the leaf spring material that comes into contact with the developer carrying member is made of a soft elastic material, and the linear pressure against the carrying member is 10
Pressed at 0 g / cm. 1m thick as a soft elastic body
m silicone rubber was used. In the developing device having the above structure, the gap between the electrostatic latent image holding member and the developer carrying member is 200 μm.
So that the developer carrier is 250 V DC.
A with a Vpp of 2000v and a frequency of 3kHz
When a copy test was carried out by applying a voltage with the C voltage superimposed as a bias, a good copy having a constant density was obtained over 30,000 sheets.
【００１２】（比較例１）上記の実施例と同様の構成に
おいて供給部材の現像剤担持体に対する電位差を第３図
に示すようようにし複写テストを行ったところ１００枚
くらいの所から画像の濃度が低下し始め、５００枚くら
いのところでは極度の濃度低下により著しく品質の悪い
コピーとなってしまった。このとき供給部材を取り出し
その表面電位を測定したところ約５００ｖの電位が観測
され、供給部材へ逆極性トナーが蓄積されたことにより
現像剤担持体と供給部材間の電界が相殺され現像剤担持
体へ充分なトナーが供給できなくなったことによること
が分かった。(Comparative Example 1) In the same construction as in the above-mentioned embodiment, the potential difference between the supply member and the developer carrying member was set as shown in FIG. The quality of the copy started to decrease, and at about 500 sheets, the copy was remarkably inferior in quality due to the extreme decrease in density. At this time, when the supply member was taken out and the surface potential was measured, a potential of about 500 V was observed, and the electric field between the developer carrier and the supply member was canceled by the accumulation of the reverse polarity toner on the supply member, and the developer carrier was cancelled. It was found that this is because sufficient toner could not be supplied.
【００１３】（比較例２）上記、比較例１と同様の構成
において、第４図に示すように厚さ２００μｍなるポリ
エステルフィルムを供給部材に当接させ、供給部材上に
蓄積される逆極性のトナーを機械的に剥離するようにし
て複写テストを行ったところ、約２００枚のところから
筋状の線がコピーに現れはじめ、３００枚では急激な濃
度低下が発生しコピーが取れなくなってしまった。その
時点で供給部材を取り出して調べたところ、発泡ウレタ
ンが破壊されており現像剤担持対への正常なトナー供給
が行えていなかったことが分かった。(Comparative Example 2) In the same structure as in Comparative Example 1 described above, as shown in FIG. 4, a polyester film having a thickness of 200 μm was brought into contact with the supply member, and the reverse polarity accumulated on the supply member was used. When a copying test was conducted with the toner being mechanically peeled off, streak lines began to appear on the copy from about 200 sheets, and at 300 sheets, a sharp drop in density occurred and the copy could not be taken. . At that time, when the supply member was taken out and examined, it was found that the urethane foam was destroyed and normal toner supply to the developer carrying pair could not be performed.
【００１４】（実施例２）前述の実施例１と同様の構成
において、供給部材として平均気孔径７μｍ、比抵抗１
０5Ωｃｍなる導電性発泡ウレタンを第５図に示す形状
に成形し、現像剤担持体との干渉量は１ｍｍで、互いに
逆方向に回転するようにした。供給部材の現像剤担持体
に対する電位差は実施例１と同様第２図に示すように
し、複写テストを行ったところ、実施例１と同様、３
０、０００枚にわたって濃度が一定した良好なコピーが
得られた。(Embodiment 2) In the same construction as that of Embodiment 1 described above, the supply member has an average pore diameter of 7 μm and a specific resistance of 1
A conductive urethane foam having a resistance of 0 5 Ωcm was molded into the shape shown in FIG. 5, the amount of interference with the developer carrying member was 1 mm, and rotations were made in opposite directions. The potential difference between the supply member and the developer carrying member was set as shown in FIG. 2 as in Example 1, and a copy test was conducted. As in Example 1, 3
Good copies were obtained with a constant density over 000 sheets.
【００１５】（比較例３）実施例２と同様の構成におい
て、第６図に示すように厚さ２００μｍなるポリエステ
ルフィルムを供給部材に当接させ、供給部材上に蓄積さ
れる逆極性のトナーを機械的に剥離するようにして複写
テストを行ったところ、供給部材のフィンが剥離部材に
当接することによって回転に変動が生じ、コピー上には
それに起因する濃度のむらが発生した。また、約３００
枚で画像濃度が低下し始め良好なコピーが得られなくな
った。(Comparative Example 3) In the same structure as in Example 2, as shown in FIG. 6, a polyester film having a thickness of 200 μm is brought into contact with the supply member, and the toner of the opposite polarity accumulated on the supply member is discharged. When a copying test was performed by mechanically peeling the fins, the fins of the supply member came into contact with the peeling member to cause fluctuations in rotation, resulting in uneven density on the copy. Also, about 300
The image density began to decrease on one sheet, and good copies could not be obtained.
【００１６】（実施例３）前述の実施例１と同様の構成
において、供給部材として第７図に示す様な金属性パイ
プを担持体に対し１ｍｍの間隙を開け配置、互いに逆方
向に回転するようにした。供給部材の現像剤担持体に対
する電位差は実施例１と同様第２図に示すようにし、複
写テストを行ったところ、実施例１と同様、３０、００
０枚にわたって濃度が一定した良好なコピーが得られ
た。(Embodiment 3) In the same construction as in Embodiment 1 described above, a metal pipe as shown in FIG. 7 is arranged as a supply member with a gap of 1 mm from the carrier, and they rotate in opposite directions. I did it. The potential difference between the supply member and the developer carrying member was set as shown in FIG. 2 as in Example 1, and a copy test was conducted.
Good copies were obtained with a constant density over 0 sheets.
【００１７】（発明の効果）本発明により簡単な構成
で、常に供給部材により充分な量のトナーを現像剤担持
体に供し、長期にわたり均一で安定した濃度の複写画像
を得ることができる非磁性一成分現像装置が得られる。
さらに、本発明によれば供給部材に圧接して機械的な剥
離機構を必要としないので供給部材として発泡ウレタン
等の比較的強度の弱い軟弾性体や表面に突起等を有する
種々の形状の物を用いることができその適用範囲は広く
なる。(Effect of the Invention) According to the present invention, a non-magnetic material which has a simple structure and is capable of constantly supplying a sufficient amount of toner to a developer carrying member by a supplying member to obtain a copy image having a uniform and stable density for a long period of time. A one-component developing device is obtained.
Furthermore, according to the present invention, since a mechanical peeling mechanism is not required by pressing against the supply member, a soft elastic body having relatively weak strength such as urethane foam as the supply member and various shapes having projections on the surface Can be used, and the applicable range is wide.
【００１８】[0018]
【図１】本発明の実施例に用いた非磁性一成分現像装置
の模式図FIG. 1 is a schematic diagram of a non-magnetic one-component developing device used in an embodiment of the present invention.
【図２】本発明による供給部材の現像剤担自体に対する
電位差を横軸を時間の関係で表した図FIG. 2 is a diagram in which the horizontal axis represents the potential difference with respect to the developer bearing itself of the supply member according to the present invention with respect to time.
【図３】従来の現像装置における供給部材の現像剤担自
体に対する電差を横軸を時間の関係で表した図FIG. 3 is a diagram in which the horizontal axis represents the time difference on the horizontal axis of the difference between the supply member and the developer bearing itself in the conventional developing device.
【図４】比較例２における供給部材に蓄積された逆極性
のトナーを剥離部材により掻き落とす構成とした現像装
置の模式図FIG. 4 is a schematic diagram of a developing device having a configuration in which a toner having an opposite polarity accumulated in a supply member in Comparative Example 2 is scraped off by a peeling member.
【図５】実施例２における供給部材の断面形状と現像剤
担持体との位置関係を表した図FIG. 5 is a diagram showing a positional relationship between a cross-sectional shape of a supply member and a developer carrier in Example 2.
【図６】比較例３における供給部材に蓄積された逆極性
のトナーを剥離部材により掻き落とす構成とした現像装
置の模式図FIG. 6 is a schematic diagram of a developing device having a configuration in which a toner having an opposite polarity accumulated in a supply member in Comparative Example 3 is scraped off by a peeling member.
【図７】実施例３に用いた金属性供給部材を表す図FIG. 7 is a diagram showing a metallic supply member used in Example 3;
【００１９】[0019]
１ …… 現像剤担持体 ２ …… 供給部剤 ３ …… トナー ４ …… 層規制部材 ５ …… ＡＣバイアス電源 ６ …… ＤＣバイアス電源 ７ …… バイアス切換装置 ８ …… 掻き取り部材 1 …… Developer carrier 2 …… Supplying agent 3 …… Toner 4 …… Layer regulating member 5 …… AC bias power supply 6 …… DC bias power supply 7 …… Bias switching device 8 …… Scraping member
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成４年１０月２８日[Submission date] October 28, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図８[Correction target item name] Figure 8
【補正方法】追加[Correction method] Added
【補正内容】[Correction content]
【図８】金属性供給部材の他の例を表す図 ─────────────────────────────────────────────────────
FIG. 8 is a diagram showing another example of the metallic supply member ──────────────────────────────────── ──────────────────
【手続補正書】[Procedure amendment]
【提出日】平成５年８月１８日[Submission date] August 18, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図面の簡単な説明[Name of item to be corrected] Brief description of the drawing
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の実施例に用いた非磁性一成分現像装置
の模式図FIG. 1 is a schematic diagram of a non-magnetic one-component developing device used in an embodiment of the present invention.
【図２】本発明による供給部材の現像剤担自体に対する
電位差を横軸を時間の関係で表した図FIG. 2 is a diagram in which the horizontal axis represents the potential difference with respect to the developer bearing itself of the supply member according to the present invention with respect to time.
【図３】従来の現像装置における供給部材の現像剤担自
体に対する電差を横軸を時間の関係で表した図FIG. 3 is a diagram in which the horizontal axis represents the time difference on the horizontal axis of the difference between the supply member and the developer bearing itself in the conventional developing device.
【図４】比較例２における供給部材に蓄積された逆極性
のトナーを剥離部材により掻き落とす構成とした現像装
置の模式図FIG. 4 is a schematic diagram of a developing device having a configuration in which a toner having an opposite polarity accumulated in a supply member in Comparative Example 2 is scraped off by a peeling member.
【図５】実施例２における供給部材の断面形状と現像剤
担持体との位置関係を表した図FIG. 5 is a diagram showing a positional relationship between a cross-sectional shape of a supply member and a developer carrier in Example 2.
【図６】比較例３における供給部材に蓄積された逆極性
のトナーを剥離部材により掻き落とす構成とした現像装
置の模式図FIG. 6 is a schematic diagram of a developing device having a configuration in which a toner having an opposite polarity accumulated in a supply member in Comparative Example 3 is scraped off by a peeling member.
【図７】実施例３に用いた金属性供給部材を表す図FIG. 7 is a diagram showing a metallic supply member used in Example 3;
【図８】金属性供給部材の他の例を表す図FIG. 8 is a diagram showing another example of the metallic supply member.
【符号の説明】 １ …… 現像剤担持体 ２ …… 供給部剤 ３ …… トナー ４ …… 層規制部材 ５ …… ＡＣバイアス電源 ６ …… ＤＣバイアス電源 ７ …… バイアス切換装置 ８ …… 掻き取り部材[Explanation of symbols] 1 ... Developer carrier 2 ... Supplying agent 3 ... Toner 4 ... Layer regulating member 5 ... AC bias power supply 6 ... DC bias power supply 7 ... Bias switching device 8 ... Scratching Collecting member
フロントページの続き (72)発明者 山本 美樹夫 神奈川県海老名市本郷2274番地富士ゼロッ クス株式会社海老名事業所内Front page continuation (72) Inventor Mikio Yamamoto 2274 Hongo, Ebina City, Kanagawa Prefecture Fuji Xerox Co., Ltd.
Claims (3)
いは間隙をおいて、現像剤の供給を行う供給部材を有
し、静電潜像現像中には、該供給部材に、正規に帯電し
ている現像剤が前記担持体ロールに吸引される方向の電
界を生じるような電圧を印加する電圧印加手段を有する
現像装置において、上記供給部材には、現像終了後、該
供給部材の回転が停止する前の一定時間、逆極性に帯電
している現像剤が前記担持体ロールに吸引される方向の
電界を生じさせるべく前記電圧印加手段の極性を反転さ
せるることを特徴とする非磁性一成分現像装置。1. A supply member for supplying a developer to or in contact with a developer carrying member carrying a developer, the supply member supplying the developer during electrostatic latent image development. In a developing device having a voltage applying means for applying a voltage such that an electrostatically charged developer generates an electric field in a direction of being attracted to the carrier roll, the supply member is provided with a voltage after the development is completed. The polarity of the voltage applying means is reversed so as to generate an electric field in the direction in which the developer charged with the opposite polarity is attracted to the carrier roll for a certain period of time before the rotation is stopped. Magnetic one-component developing device.
１回転ないしは１０回転する間、逆極性に帯電している
現像剤が前記担持体ロールに吸引される方向の電界を生
じるような電圧を印加することを特徴とする特許請求の
範囲第１項に記載の非磁性一成分現像装置。2. The supply member is configured to generate an electric field in the direction in which the developer charged with the opposite polarity is attracted to the carrier roll during one or ten revolutions of the supply member after the development is completed. The non-magnetic one-component developing device according to claim 1, wherein a different voltage is applied.
帯電している現像剤が前記担持体ロールに吸引される方
向の電界を生じるような電圧が印加されている間は停止
している事を特徴とする特許請求の範囲第１項に記載の
非磁性一成分現像装置。3. The developer carrier is stopped while a voltage is applied to the supply member so as to generate an electric field in the direction in which the developer charged with the opposite polarity is attracted to the carrier roll. The non-magnetic one-component developing device according to claim 1, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3200035A JP2990622B2 (en) | 1991-07-15 | 1991-07-15 | Non-magnetic one-component developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3200035A JP2990622B2 (en) | 1991-07-15 | 1991-07-15 | Non-magnetic one-component developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0643742A true JPH0643742A (en) | 1994-02-18 |
| JP2990622B2 JP2990622B2 (en) | 1999-12-13 |
Family
ID=16417741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3200035A Expired - Fee Related JP2990622B2 (en) | 1991-07-15 | 1991-07-15 | Non-magnetic one-component developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2990622B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005189767A (en) * | 2003-12-26 | 2005-07-14 | Canon Inc | Developing apparatus and image forming apparatus |
| US7230605B2 (en) | 2001-01-10 | 2007-06-12 | Sony Corporation | Information processing terminal |
| JP2011013663A (en) * | 2009-06-01 | 2011-01-20 | Canon Inc | Image forming apparatus |
| JP2012032592A (en) * | 2010-07-30 | 2012-02-16 | Brother Ind Ltd | Developer feeding device |
-
1991
- 1991-07-15 JP JP3200035A patent/JP2990622B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7230605B2 (en) | 2001-01-10 | 2007-06-12 | Sony Corporation | Information processing terminal |
| JP2005189767A (en) * | 2003-12-26 | 2005-07-14 | Canon Inc | Developing apparatus and image forming apparatus |
| JP2011013663A (en) * | 2009-06-01 | 2011-01-20 | Canon Inc | Image forming apparatus |
| JP2012032592A (en) * | 2010-07-30 | 2012-02-16 | Brother Ind Ltd | Developer feeding device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2990622B2 (en) | 1999-12-13 |
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