JP2617028B2 - Developing device for electrophotographic equipment - Google Patents
Developing device for electrophotographic equipmentInfo
- Publication number
- JP2617028B2 JP2617028B2 JP32475090A JP32475090A JP2617028B2 JP 2617028 B2 JP2617028 B2 JP 2617028B2 JP 32475090 A JP32475090 A JP 32475090A JP 32475090 A JP32475090 A JP 32475090A JP 2617028 B2 JP2617028 B2 JP 2617028B2
- Authority
- JP
- Japan
- Prior art keywords
- developing roller
- developer
- powder developer
- image carrier
- developing
- 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.)
- Expired - Fee Related
Links
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、粉体現像剤を用いた電子写真装置の現像装
置に関する。Description: TECHNICAL FIELD The present invention relates to a developing device of an electrophotographic apparatus using a powder developer.
［従来の技術］ はじめに、電子写真装置の概略構成を第７図および第
８図に基づき説明する。[Prior Art] First, a schematic configuration of an electrophotographic apparatus will be described with reference to FIGS. 7 and 8. FIG.
これらの図において、１は像担持体で矢印Ａ方向に回
転される。像担持体１は、まず、帯電装置２で表面が均
一に帯電された後、図示しない光学系からのレーザビー
ム３によって表面に静電潜像が形成される。像担持体１
に形成された静電潜像は、像担持体１の回転に伴い、現
像装置10の粉体現像剤（例えば磁性粉体現像剤４）によ
って現像された後、転写器５において図示しない給紙部
から送られてきた転写紙に転写される。In these figures, reference numeral 1 denotes an image carrier which is rotated in the direction of arrow A. First, after the surface of the image carrier 1 is uniformly charged by the charging device 2, an electrostatic latent image is formed on the surface by a laser beam 3 from an optical system (not shown). Image carrier 1
The electrostatic latent image formed on the image carrier 1 is developed by a powder developer (for example, a magnetic powder developer 4) of the developing device 10 with the rotation of the image carrier 1, and then fed by a transfer unit 5 (not shown). It is transferred to the transfer paper sent from the department.
ここで、現像装置10は、磁性粉体現像剤４を収容しか
つ像担持体１の周面に臨んで開口部12を有する収容ケー
ス11と、この収容ケース11の開口部12に回転自在に設け
られ駆動モータ（図示省略）によって回転駆動される筒
状の現像ローラ13とを含み構成されている。なお、第７
図において、14は現像ローラ13に担持された磁性粉体現
像剤４の厚みを一定に規制するブレードである。Here, the developing device 10 accommodates the magnetic powder developer 4 and has an opening 12 facing the peripheral surface of the image carrier 1. And a cylindrical developing roller 13 that is provided and is driven to rotate by a driving motor (not shown). The seventh
In the figure, reference numeral 14 denotes a blade for regulating the thickness of the magnetic powder developer 4 carried on the developing roller 13 to a constant value.
したがって、像担持体１に形成された静電潜像を現像
する際は、収容ケース11内の磁性粉体現像剤４は、現像
ローラ13の周面上に磁気的に担持されながら当該ローラ
13の回転に伴ってブレード14により定量層とされた後、
像担持体１に供給される。Therefore, when developing the electrostatic latent image formed on the image carrier 1, the magnetic powder developer 4 in the storage case 11 is
After being made a fixed layer by the blade 14 with the rotation of 13,
The image is supplied to the image carrier 1.
ところで、現像ローラ13には、収容ケース11内に収容
された磁性粉体現像剤４の圧力がかかる。また、現像ロ
ーラ13は、その両端部13b,13d付近では磁性粉体現像剤
４の担持力が弱まる傾向にある。そのため、現像剤４が
当該ローラ13の両端部13b,13dを侵食して現像装置外部
に漏れやすく、電子写真装置内部を汚したり、転写紙上
に落下して転写紙を汚したりする原因となる。Incidentally, the pressure of the magnetic powder developer 4 stored in the storage case 11 is applied to the developing roller 13. Further, the developing roller 13 has a tendency that the carrying force of the magnetic powder developer 4 is weakened in the vicinity of both ends 13b and 13d. As a result, the developer 4 erodes both ends 13b and 13d of the roller 13 and easily leaks to the outside of the developing device, thereby soiling the inside of the electrophotographic apparatus or dropping onto the transfer paper to stain the transfer paper.
そこで、現像ローラ13の両端部13b,13dを気密にする
ために当該両端部13b,13dと収納ケース11との間にスポ
ンジやアクリルパイル材等の弾性を有するシール部材1
6,16を嵌合して磁性粉体現像剤４が現像装置から漏れる
のを防止している。Therefore, in order to make both ends 13b, 13d of the developing roller 13 airtight, an elastic sealing member 1 such as a sponge or an acrylic pile material is provided between the both ends 13b, 13d and the storage case 11.
6, 16 are fitted to prevent the magnetic powder developer 4 from leaking from the developing device.
［発明が解決しようとする課題］ ところで、上記シール部材16は、使用に伴って劣化し
シール性能が低下するため、磁性粉体現像剤４が、シー
ル性能が低下したシール部材16,16と現像ローラ13の両
端部13b,13dとの間を伝って現像装置外部に漏れ出る事
態が生じることがある。[Problems to be Solved by the Invention] Since the sealing member 16 is deteriorated with use and the sealing performance is reduced, the magnetic powder developer 4 is developed with the sealing members 16 and 16 having the reduced sealing performance. There is a possibility that the toner leaks to the outside of the developing device through the space between both ends 13b and 13d of the roller 13.
そこで、かかる事態が生じないようにするために、シ
ール部材16,16の劣化を予め見込んで、当該シール部材1
6,16を、現像ローラ13の両端部13b,13dと収容ケース11
との間にきつく嵌合し、当該シール部材16の現像ローラ
13に対する接触圧力が標準よりも大きくなるようにして
おくことが考えられる。Therefore, in order to prevent such a situation from occurring, the deterioration of the seal members 16, 16 is expected in advance, and
6, 16 and both ends 13b, 13d of the developing roller 13 and the accommodation case 11
And the developing roller of the sealing member 16
It is conceivable that the contact pressure for 13 is made higher than the standard.
しかし、これでは、現像ローラ13の回転抵抗が大きく
なり過ぎて、当該ローラ13を回転駆動する駆動モータに
過負荷が掛かることになり現像装置の寿命が短くなるお
それが生じる。However, in this case, the rotational resistance of the developing roller 13 becomes too large, and a driving motor for rotating the roller 13 is overloaded, which may shorten the life of the developing device.
本発明の目的は、長期に亙って粉体現像剤が外部に漏
れるのを防止することができる電子写真装置の現像装置
を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a developing device of an electrophotographic apparatus capable of preventing a powder developer from leaking outside for a long period of time.
［課題を解決するための手段］ 請求項第１項記載の発明は、粉体現像剤を収容可能で
像担持体に対向配設された収容ケースと、この収容ケー
スの開口部に、両端部がシール部材で気密されかつ所定
方向に回転駆動されるように設けられた現像ローラとを
備え、この現像ローラの周面に粉体現像剤を担持させて
前記像担持体へ供給する電子写真装置の現像装置におい
て、 前記収容ケースの開口部下端に形成された現像剤受け
の両側部分に，像担持体側から収容ケース内側に向かっ
て幅狭となるように傾斜配設されたリブを備えたことを
特徴とする。[Means for Solving the Problems] According to the first aspect of the present invention, there is provided a housing case capable of housing a powder developer and disposed opposite to an image carrier, and an opening portion of the housing case having two end portions. And a developing roller provided so as to be hermetically sealed by a sealing member and to be driven to rotate in a predetermined direction. The electrophotographic apparatus supplies a powder developer to a peripheral surface of the developing roller and supplies the developer to the image carrier. The developing device according to any one of claims 1 to 3, further comprising: a rib that is provided on both sides of the developer receiver formed at the lower end of the opening of the storage case so as to be narrower from the image carrier side toward the inside of the storage case. It is characterized by.
また、請求項第２項記載の発明は、粉体現像剤を収容
可能で像担持体に対向配設された収容ケースと、この収
容ケースの開口部に，両端部がシール部材で気密されか
つ所定方向に回転駆動されるように設けられた現像ロー
ラとを備え、この現像ローラの周面に粉体現像剤を担持
させて前記像担持体へ供給する電子写真装置の現像装置
において、 前記収容ケースの開口部下端に配設された現像剤受け
の両側部分に，前記現像ローラの軸心と直角方向に配設
されかつ当該現像ローラ周面との間に前記粉体現像剤の
通過を抑止可能な間隙を有するリブを設けたことを特徴
とする。According to a second aspect of the present invention, there is provided a storage case capable of storing a powder developer and disposed opposite to an image carrier, and both ends of the storage case are hermetically sealed by a seal member at an opening thereof. A developing roller provided to be driven to rotate in a predetermined direction; a developing device of an electrophotographic apparatus for supporting a powder developer on a peripheral surface of the developing roller and supplying the developer to the image carrier; At both sides of a developer receiver disposed at the lower end of the opening of the case, the powder developer is disposed at right angles to the axis of the developing roller and between the developing roller and the peripheral surface of the developing roller. A rib having a possible gap is provided.
［作用］ 請求項第１項記載の発明では、所定方向に回転される
現像ローラ上の粉体現像剤に、シール部材の内方におい
てリブにより当該ローラの内側に向かう抗力が作用す
る。すなわち、上記粉体現像剤は、リブによって内側に
向けて付勢される。これにより、粉体現像剤がシール部
材に向けて移動しようとする勢いが大幅に弱められるこ
とになる。その結果、シール部材の現像ローラに対する
接触圧力を標準より大きくしなくても、粉体現像剤が現
像ローラとシール部材との間を侵食して外部に漏れ出よ
うとするのを素子できる。このように、リブによってシ
ール部材のシール機能が補完されて粉体現像剤の漏洩が
防止される。[Operation] According to the first aspect of the present invention, a drag acts on the powder developer on the developing roller rotated in a predetermined direction toward the inside of the roller by the rib inside the seal member. That is, the powder developer is urged inward by the ribs. As a result, the momentum for the powder developer to move toward the seal member is greatly reduced. As a result, it is possible to prevent the powder developer from eroding between the developing roller and the seal member and leaking out to the outside even if the contact pressure of the seal member against the developing roller is not made larger than the standard. In this manner, the sealing function of the sealing member is complemented by the rib, and leakage of the powder developer is prevented.
請求項第２項記載の発明では、所定方向に回転される
現像ローラ上の粉体現像剤が、当該現像ローラ上をシー
ル部材に向けて移動しようとしてもリブによって抑止さ
れる。これにより、シール部材にまで到達する粉体現像
剤の量を大幅に減少させることができる。その結果、シ
ール部材の現像ローラに対する接触圧力を標準より大き
くしなくても粉体現像剤の漏洩を防止できる。なお、こ
の際、リブは現像ローラの円滑回転が妨げない。これに
より、現像ローラを一段と円滑に回転させつつ当該ロー
ラ上の粉体現像剤が外部に漏れ出ようとするのを阻止す
ることができる。According to the second aspect of the present invention, the powder developer on the developing roller rotated in the predetermined direction is suppressed by the rib even if the powder developer moves on the developing roller toward the seal member. Thereby, the amount of the powder developer that reaches the seal member can be significantly reduced. As a result, it is possible to prevent the powder developer from leaking without increasing the contact pressure of the seal member to the developing roller higher than the standard. At this time, the rib does not hinder the smooth rotation of the developing roller. This makes it possible to prevent the powder developer on the roller from leaking out while rotating the developing roller more smoothly.
［実施例］ 以下、本発明の一実施例を第１図〜第４図に基づき説
明する。Embodiment One embodiment of the present invention will be described below with reference to FIGS.
本実施例に係る電子写真装置の現像装置は、第１図お
よび第２図に示す如く、収容ケース11,現像ローラ13お
よび本装置の特徴部であるリブ21等を含み構成されてい
る。As shown in FIGS. 1 and 2, the developing device of the electrophotographic apparatus according to the present embodiment includes a housing case 11, a developing roller 13, a rib 21 which is a characteristic portion of the present device, and the like.
なお、第７図および第８図において示した構成要素と
同一のものについては同一の符号を付し、その説明を省
略もしくは簡略化する。The same components as those shown in FIGS. 7 and 8 are denoted by the same reference numerals, and description thereof will be omitted or simplified.
本実施例においては、現像ローラ13は、第３図に示す
如く、半径をｒとし、かつ駆動モータ（図示省略）によ
って軸心13aを中心として矢印Ｒ方向に所定の回転数ｎ
によって回転駆動されるように形成されている。In this embodiment, as shown in FIG. 3, the developing roller 13 has a radius r and a predetermined rotation speed n in the direction of arrow R about the axis 13a by a driving motor (not shown).
It is formed so as to be driven to rotate.
また、リブ21は、収容ケース11の開口部12下端に形成
された現像剤受け15の両側部分に設けられており、シー
ル部材16,16の内方において現像ローラ13の回転力を利
用して当該ローラ13周面上の粉体現像剤（本実施例では
磁性粉体現像剤４）に内側に向かう抗力を発生させるよ
うに形成されている。Further, the ribs 21 are provided on both side portions of the developer receiver 15 formed at the lower end of the opening 12 of the storage case 11, and use the rotational force of the developing roller 13 inside the seal members 16, 16. The powder developer (the magnetic powder developer 4 in this embodiment) on the peripheral surface of the roller 13 is formed so as to generate an inward drag.
具体的には、リブ21は、第３図および第４図に示す如
く、像担持体１側から収容ケース11内側に向かって幅狭
となるように傾斜配設されている。本実施例において
は、リブ21は、各シール部材16の内方でかつ現像ローラ
13の印字有効領域外部分に２個づつ設けられている。ま
た、リブ21の傾斜角度θは15゜とされている。さらに、
外側のリブ21の先端部と内側のリブ21の後端部との間隔
ｂは20（mm）とされている。Specifically, as shown in FIGS. 3 and 4, the ribs 21 are inclined so as to become narrower from the image carrier 1 side toward the inside of the storage case 11. In the present embodiment, the rib 21 is located inside each of the sealing members 16 and the developing roller.
Two of them are provided in each of the 13 print effective areas. The inclination angle θ of the rib 21 is set to 15 °. further,
The distance b between the front end of the outer rib 21 and the rear end of the inner rib 21 is 20 (mm).
したがって、例えば現像ローラ13の回転時に当該現像
ローラ13の周面上に担持された質量ｍの磁性粉体現像剤
４が、当該ローラ13の両端部13b,13dを侵食して外部に
漏洩しようとしても，リブ21により第４図に示す如く現
像ローラ13の内側に向かう抗力Ｎが作用する。Therefore, for example, when the developing roller 13 rotates, the magnetic powder developer 4 having a mass m carried on the peripheral surface of the developing roller 13 erodes both ends 13b and 13d of the roller 13 and tries to leak to the outside. Also, as shown in FIG. 4, a drag N acting toward the inside of the developing roller 13 acts on the rib 21.
ここで、抗力Ｎは次式で求められる。 Here, the drag N is obtained by the following equation.
Ｎ＝Ｆ・sinθ 上式において、θはリブ21の傾斜角度である。また、
Ｆは質量ｍの磁性粉体現像剤４がリブ21に対して現像ロ
ーラ13の長手方向と直角方向に及ぼす力である。N = F · sin θ In the above equation, θ is the inclination angle of the rib 21. Also,
F is a force exerted by the magnetic powder developer 4 having a mass m on the rib 21 in a direction perpendicular to the longitudinal direction of the developing roller 13.
次に作用について説明する。 Next, the operation will be described.
像担持体（１）に形成された静電潜像を現像装置で現
像する際は、収容ケース11内の磁性粉体現像剤４が現像
ローラ13に磁気的に担持され当該ローラ13の矢印Ｒ方向
の回転に伴い同期的に回転して像担持体１に供給され
る。この際、現像ローラ13上の磁性粉体現像剤４は、当
該ローラ13の両端部13b,13dを侵食して外部に漏れ出よ
うとするが、磁性粉体現像剤４には、シール部材16の内
方においてリブ21により内側に向かう効力Ｎ（＝Ｆ・si
nθ）が作用する。これにより、磁性粉体現像剤４がシ
ール部材16に向けて移動しようとする勢いが大幅に弱め
られる。その結果、シール部材16の現像ローラ13に対す
る接触圧力を標準より大きくしなくても、磁性粉体現像
剤４が現像ローラ13とシール部材16との間を侵食して外
部に漏れ出ようとするのを阻止できる。このように、リ
ブ21によってシール部材16のシール機能が補完されて、
当該シール部材16が長期間使用された結果劣化してシー
ル性能が低下しても、現像剤４が外部に漏れるのが阻止
される。When the electrostatic latent image formed on the image carrier (1) is developed by the developing device, the magnetic powder developer 4 in the storage case 11 is magnetically carried by the developing roller 13 and the arrow R of the roller 13 The image is supplied to the image carrier 1 while rotating synchronously with the rotation in the direction. At this time, the magnetic powder developer 4 on the developing roller 13 erodes both ends 13b and 13d of the roller 13 and tries to leak out. Inward due to the rib 21 inward of N (= F · si
nθ) acts. As a result, the momentum at which the magnetic powder developer 4 moves toward the seal member 16 is greatly reduced. As a result, the magnetic powder developer 4 erodes between the developing roller 13 and the seal member 16 and tends to leak out without making the contact pressure of the seal member 16 with the developing roller 13 higher than the standard. Can be prevented. Thus, the rib 21 complements the sealing function of the sealing member 16,
Even if the seal member 16 has been used for a long period of time and deteriorates to lower the sealing performance, the leakage of the developer 4 to the outside is prevented.
しかして、この実施例によれば、収容ケース11の開口
部12下端に形成された現像剤受け15の両側部分に，像担
持体１側から収容ケース11内側に向かって幅狭となるよ
うに傾斜配設されたリブ21を備えた構成であるので、長
期に亙って磁性粉体現像剤４が外部に漏れるのを防止す
ることができる。According to this embodiment, both sides of the developer receiver 15 formed at the lower end of the opening 12 of the storage case 11 are narrowed from the image carrier 1 side toward the inside of the storage case 11. The configuration having the inclined ribs 21 can prevent the magnetic powder developer 4 from leaking to the outside for a long period of time.
また、リブ21を、現像ローラ13の回転力を利用して駆
動させる構成としたので、専用の駆動装置を設ける必要
はなく、現像装置を大型化・複雑化させない。In addition, since the rib 21 is configured to be driven by using the rotational force of the developing roller 13, there is no need to provide a dedicated driving device, and the developing device is not enlarged and complicated.
なお、上記した実施例においては、リブ21を傾斜配設
したが、第５図および第６図に示す如く、リブ21を収容
ケース11の現像剤受け15の両側部分に現像ローラ13の軸
心13aと直角方向に配設されかつ当該現像ローラ13周面
との間に所定の間隙Ｇを有するように設けてもよい。こ
こにおいて、間隙Ｇは、現像ローラ13上の磁性粉体現像
剤４の通過を抑止可能に選定されている。かかる構成に
より、磁性粉体現像剤４が現像ローラ13上をシール部材
16に向けて移動しようとしてもリブ21によって抑止され
る。これにより、シール部材16にまで到達する磁性粉体
現像剤４の量を大幅に減少させることができる。その結
果、シール部材16の現像ローラ13に対する接触圧力を格
別大きくしなくても磁性粉体現像剤４の漏洩を防止でき
る。なお、この際、リブ21は現像ローラ13の円滑回転を
妨げない。In the above-described embodiment, the ribs 21 are arranged obliquely. However, as shown in FIGS. 5 and 6, the ribs 21 are provided on both sides of the developer receiver 15 of the housing case 11 so that the axial center of the developing roller 13 is fixed. 13a, and may be provided so as to have a predetermined gap G between the developing roller 13 and the peripheral surface thereof. Here, the gap G is selected so that the passage of the magnetic powder developer 4 on the developing roller 13 can be suppressed. With this configuration, the magnetic powder developer 4 is placed on the developing roller 13 with a sealing member.
Any attempt to move toward 16 is suppressed by ribs 21. Thereby, the amount of the magnetic powder developer 4 reaching the seal member 16 can be greatly reduced. As a result, it is possible to prevent the magnetic powder developer 4 from leaking without increasing the contact pressure of the seal member 16 with the developing roller 13. At this time, the rib 21 does not hinder the smooth rotation of the developing roller 13.
また、粉体現像剤として磁性粉体現像剤４を用いた
が、非磁性粉体現像剤を用いても同様の効果（すなわ
ち、長期に亙って非磁性粉体現像剤が外部に漏れ出るの
を防止することができる。）を奏することができる。Further, although the magnetic powder developer 4 is used as the powder developer, the same effect can be obtained by using the non-magnetic powder developer (that is, the non-magnetic powder developer leaks to the outside for a long period of time). Can be prevented.).
［発明の効果］ 請求項第１項記載の発明によれば、収容ケースの開口
部下端に形成された現像剤受けの両側部分に，像担持体
側から収容ケース内側に向かって幅狭となるように傾斜
配設されたリブを備えた構成としたので、長期に亙って
粉体現像剤が外部に漏れるのを防止することができる。According to the first aspect of the invention, the width of the developer receiving portion formed at the lower end of the opening of the storage case is narrowed from the image carrier side toward the inside of the storage case. With the configuration provided with the inclined ribs, the powder developer can be prevented from leaking to the outside for a long time.
また、請求項第２項記載の発明によれば、収容ケース
の開口部下端に配設された現像剤受けの両側部分に，現
像ローラの軸心と直角方向に配設されかつ当該現像ロー
ラ周面との間に粉体現像剤の通過を抑止可能な間隙を有
するリブを設けた構成としたので、現像ローラを一段と
円滑に回転させつつ当該ローラ上の粉体現像剤が外部に
漏れ出ようとするのを阻止することができる。According to the second aspect of the present invention, at both sides of the developer receiver provided at the lower end of the opening of the storage case, the developer is disposed in a direction perpendicular to the axis of the developing roller, Since the rib having a gap capable of suppressing the passage of the powder developer between the surface and the surface is provided, the powder developer on the roller may leak to the outside while rotating the developing roller more smoothly. Can be prevented.
第１図〜第４図は本発明の一実施例を示す図で、第１図
は収容ケースを示す正面図，第２図は側面図，第３図お
よび第４図は現像ローラとリブとの位置関係を説明する
ための図である。第５図および第６図は別の実施例の要
部を示す図である。第７図および第８図は従来の現像装
置を示す図で、第７図は側断面図，第８図は正面図であ
る。 11……収容ケース、 12……開口部、 13……現像ローラ、 15……現像剤受け、 21……リブ。1 to 4 show an embodiment of the present invention. FIG. 1 is a front view showing a storage case, FIG. 2 is a side view, and FIGS. 3 and 4 are development rollers and ribs. FIG. 4 is a diagram for explaining the positional relationship of FIG. FIG. 5 and FIG. 6 are views showing the main parts of another embodiment. 7 and 8 show a conventional developing device. FIG. 7 is a side sectional view and FIG. 8 is a front view. 11 ... accommodation case, 12 ... opening, 13 ... developing roller, 15 ... developer receiver, 21 ... rib.
Claims (2)
設された収容ケースと、この収容ケースの開口部に，両
端部がシール部材で気密されかつ所定方向に回転駆動さ
れるように設けられた現像ローラとを備え、この現像ロ
ーラの周面に粉体現像剤を担持させて前記像担持体へ供
給する電子写真装置の現像装置において、 前記収容ケースの開口部下端に形成された現像剤受けの
両側部分に，像担持体側から収容ケース内側に向かって
幅狭となるように傾斜配設されたリブを備えたことを特
徴とする電子写真装置の現像装置。A storage case capable of storing a powder developer and disposed opposite to an image carrier, and both ends of the storage case are hermetically sealed by a seal member and driven to rotate in a predetermined direction. A developing roller provided as described above, and a developing device for an electrophotographic apparatus that supplies a powder developer to a peripheral surface of the developing roller and supplies the developer to the image carrier. A developing device for an electrophotographic apparatus, characterized in that ribs are provided on both sides of the formed developer receiver so as to be inclined so as to become narrower from the image carrier side toward the inside of the housing case.
設された収容ケースと、この収容ケースの開口部に、両
端部がシール部材で気密されかつ所定方向に回転駆動さ
れるように設けられた現像ローラとを備え、この現像ロ
ーラの周面に粉体現像剤を担持させて前記像担持体へ供
給する電子写真装置の現像装置において、 前記収容ケースの開口部下端に配設された現像剤受けの
両側部分に，前記現像ローラの軸心と直角方向に配設さ
れかつ当該現像ローラ周面との間に前記粉体現像剤の通
過を抑止可能な間隙を有するリブを設けたことを特徴と
する電子写真装置の現像装置。2. An accommodation case capable of accommodating a powder developer and opposed to an image carrier, and both ends of the accommodation case are hermetically sealed by a seal member and driven to rotate in a predetermined direction. A developing roller provided in such a manner that the powder developer is supported on the peripheral surface of the developing roller and supplied to the image carrier. Ribs are provided on both sides of the provided developer receiver in a direction perpendicular to the axis of the developing roller and have a gap between the developing roller and the peripheral surface of the developing roller that can prevent the passage of the powder developer. A developing device for an electrophotographic apparatus, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32475090A JP2617028B2 (en) | 1990-11-27 | 1990-11-27 | Developing device for electrophotographic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32475090A JP2617028B2 (en) | 1990-11-27 | 1990-11-27 | Developing device for electrophotographic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04191873A JPH04191873A (en) | 1992-07-10 |
| JP2617028B2 true JP2617028B2 (en) | 1997-06-04 |
Family
ID=18169266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32475090A Expired - Fee Related JP2617028B2 (en) | 1990-11-27 | 1990-11-27 | Developing device for electrophotographic equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2617028B2 (en) |
-
1990
- 1990-11-27 JP JP32475090A patent/JP2617028B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04191873A (en) | 1992-07-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |