JPH04285979A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPH04285979A JPH04285979A JP3051247A JP5124791A JPH04285979A JP H04285979 A JPH04285979 A JP H04285979A JP 3051247 A JP3051247 A JP 3051247A JP 5124791 A JP5124791 A JP 5124791A JP H04285979 A JPH04285979 A JP H04285979A
- Authority
- JP
- Japan
- Prior art keywords
- conductive
- layer
- elastic layer
- elastic
- 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.)
- Pending
Links
- 239000013013 elastic material Substances 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 75
- 238000000034 method Methods 0.000 description 13
- 239000006260 foam Substances 0.000 description 8
- 239000003973 paint Substances 0.000 description 8
- 229920001971 elastomer Polymers 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000005060 rubber Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 239000007779 soft material Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000010097 foam moulding Methods 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000008259 solid foam Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は画像形成手段として電子
写真原理に基づき現像剤を使用する現像装置に関し、さ
らに詳しくは弾性を有する現像剤担持体により現像剤を
搬送し現像す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 that uses a developer based on electrophotographic principles as an image forming means, and more particularly to a developing device that conveys the developer using an elastic developer carrier for development.
【０００２】0002
【従来の技術】従来の現像装置、特に弾性材料からなる
現像剤担持体を用いる現像装置では、現像剤担持体を潜
像担持体に接触あるいは圧接させて現像を行なう方式が
提案あるいは実現されている。これらの方式は現像電極
が潜像担持体に対して近接するので、高解像度な印字が
できる特徴を有する。しかしながら現像剤担持体と潜像
担持体の当接部における当接圧力が変化すると現像特性
も変わり、また当接圧力が増大すると現像剤や潜像担持
体へのダメージが生じた。そこで当接圧力が小さくしか
も変化しにくい現像剤担持体、すなわちなるべく柔軟な
弾性材料からなる現像剤担持体が望まれている。具体的
には低硬度のソリッドゴム、ソリッドフォームなどのソ
リッド軟質材料あるいは発泡ゴム、発泡フォームなどの
発泡体が提案されている。特に発泡体はソリッド軟質材
料では実現し得ない柔軟性を得ることができるので現像
剤担持体の材料として好適である。また、現像のために
は現像電極を形成し現像バイアスを印加する必要があり
、そのためには弾性材料そのものを導電性材料とするこ
とや現像剤担持体の表面に導電層を形成することが考え
られている。2. Description of the Related Art In conventional developing devices, particularly those using a developer carrier made of an elastic material, a method has been proposed or realized in which the developer carrier is brought into contact with or pressed against the latent image carrier to perform development. There is. These methods have the characteristic that high-resolution printing can be performed because the developing electrode is close to the latent image carrier. However, when the contact pressure at the contact portion between the developer carrier and the latent image carrier changes, the development characteristics also change, and when the contact pressure increases, damage to the developer and the latent image carrier occurs. Therefore, there is a need for a developer carrier that has a small contact pressure and is difficult to change, that is, a developer carrier that is made of an elastic material that is as flexible as possible. Specifically, solid soft materials such as low-hardness solid rubber and solid foam, and foamed materials such as foamed rubber and foamed foam have been proposed. In particular, foams are suitable as materials for developer carriers because they can provide flexibility that cannot be achieved with solid soft materials. In addition, for development, it is necessary to form a development electrode and apply a development bias, and for this purpose, it is possible to use the elastic material itself as a conductive material or to form a conductive layer on the surface of the developer carrier. It is being
【０００３】0003
【発明が解決しようとする課題】しかしながら弾性材料
自身に導電性を持たせるためには、導電性物質例えばカ
ーボンや金属の微粉末あるいは微細繊維を弾性材料中に
分散させる必要があり、その結果柔軟性を損ねてしまっ
ていた。また導電性材料として発泡ゴムのような発泡体
を用いる場合には、導電性塗料を発泡体に含浸させる方
法もある。しかしこの場合も導電性塗料中の導電性物質
あるいはバインダの影響で発泡体の柔軟性が損なわれて
いた。[Problem to be Solved by the Invention] However, in order to make the elastic material itself conductive, it is necessary to disperse conductive substances such as carbon or metal fine powders or fine fibers into the elastic material. I had lost my sexuality. Furthermore, when using a foam such as foam rubber as the conductive material, there is also a method of impregnating the foam with a conductive paint. However, in this case as well, the flexibility of the foam was impaired by the influence of the conductive substance or binder in the conductive paint.
【０００４】現像剤担持体の表面に導電層を形成した場
合には、現像剤担持体の円周面と端面に導電層を形成し
軸との電気的接続をとるが、円周面と端面との境界稜線
はエッジ形状のため傷つきやすく電気的接続の信頼性が
低かった。この対策として特開平２−３７３７８号公報
に開示されるように、
■接続稜線を面取りあるいは曲面とする方法■弾性体の
両端に導電性弾性体を配置し導電層と電気的接続する方
法
が提案されているが、前者の場合には柔軟な弾性体に対
して精度良く面取りあるいは曲面形状加工を施すことが
困難であった。後者の場合は部品点数が増え、しかも導
電性弾性体を弾性体の両端に配置後両者の円周面を揃え
るための加工が必要であったり、また両者の境界面の接
合が充分でないと境界面の分離により導電層と導電性弾
性体との電気的接続が切れる可能性が高かった。When a conductive layer is formed on the surface of the developer carrier, the conductive layer is formed on the circumferential surface and end surfaces of the developer carrier to establish electrical connection with the shaft. Because of the edge shape of the boundary ridge line, it was easily damaged and the reliability of the electrical connection was low. As a countermeasure to this problem, as disclosed in Japanese Patent Application Laid-Open No. 2-37378, the following methods have been proposed: ■ A method of chamfering or curved connection edges; ■ A method of arranging a conductive elastic body at both ends of the elastic body and electrically connecting it to the conductive layer. However, in the former case, it is difficult to accurately chamfer or curve the flexible elastic body. In the latter case, the number of parts increases, and furthermore, processing is required to align the circumferential surfaces of the two after placing the conductive elastic body at both ends of the elastic body, and if the interface between the two is not sufficiently joined, the boundary There was a high possibility that the electrical connection between the conductive layer and the conductive elastic body would be broken due to separation of the surfaces.
【０００５】本発明はこのような課題点を解決するもの
であり、その目的とするところは簡単な構造と製法で現
像剤担持体を実現することにより、低コストで信頼性が
高く、接触現像方式あるいは圧接現像方式に好適な現像
装置を提供することにある。The present invention is intended to solve these problems, and its purpose is to realize a developer carrier with a simple structure and manufacturing method, thereby achieving low cost, high reliability, and contact development. It is an object of the present invention to provide a developing device suitable for the development method or the pressure contact development method.
【０００６】[0006]
【課題を解決するための手段】以上の課題解決するため
に本発明は、現像剤担持体により現像剤を搬送し、前記
現像剤を潜像担持体に現像する現像装置において、現像
剤担持体は少なくとも導電性剛体からなる軸の外周に気
孔を有する弾性体からなる弾性層を配設したもので、弾
性層の表面に導電層を形成し、弾性層の軸方向端面近傍
は導電化処理されかつ導電層とが電気的に接続している
ことを特徴とする。[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a developing device that transports a developer by a developer carrier and develops the developer on a latent image carrier. An elastic layer made of an elastic material having pores is arranged at least on the outer periphery of a shaft made of a conductive rigid body, a conductive layer is formed on the surface of the elastic layer, and the vicinity of the axial end surface of the elastic layer is treated to be conductive. It is also characterized in that it is electrically connected to the conductive layer.
【０００７】また本発明の現像装置は、現像剤担持体の
弾性層の軸方向端面近傍は端面からの深さが０．５ｍｍ
以上の範囲にわたって導電化処理してあることを特徴と
する。Further, in the developing device of the present invention, the elastic layer of the developer carrier has a depth of 0.5 mm from the end surface in the vicinity of the axial end surface.
It is characterized by being subjected to conductive treatment over the above range.
【０００８】また本発明の現像装置は、現像剤担持体の
弾性層の画像形成範囲の外側において軸方向端面近傍が
導電化処理してあることを特徴とする。Further, the developing device of the present invention is characterized in that the vicinity of the axial end face of the elastic layer of the developer carrier outside the image forming area is subjected to conductive treatment.
【０００９】[0009]
【実施例】（実施例１）図１は本発明の現像装置を用い
た画像形成装置の断面概観図である。潜像担持体１は、
導電性の支持部２の上に有機または無機の光導電性を有
する感光材料で感光層３を塗膜したものであって、感光
層３をコロナ帯電器や帯電ローラ等の帯電器４を用いて
帯電した後に、レーザーやＬＥＤ等の光源５から出た光
を結像光学系６を通して感光層３に画像に応じて選択的
に光照射して電位コントラストを得て静電潜像を形成す
る。一方、現像装置７は現像剤８を搬送し現像するもの
であって、現像剤８を搬送する現像剤担持体９は、シャ
フト１０の外周に弾性層１１及び導電層１２をそれぞれ
同心円状に配設したもので、金属や樹脂で構成される板
状の弾性ブレード１３で現像剤８を摩擦帯電し適量に規
制した状態で現像剤担持体９を回転させて薄層の現像剤
８を搬送するものである。現像剤担持体９は潜像担持体
１に所定の圧力で圧接されており、圧接部まで現像剤８
が搬送されると潜像担持体１の電位コントラスト及び現
像バイアス印加手段１４により現像電界が形成され、現
像電界に応じて帯電した現像剤８が潜像担持体１に付着
し静電潜像が顕像化される。さらに、コロナ転写器や転
写ローラ等の転写器１５を用いて記録紙１６上に現像剤
８による像を転写し、熱や圧力を用いて現像剤８を記録
紙１６に定着し所望の画像を記録紙１６上に得るもので
ある。Embodiments (Embodiment 1) FIG. 1 is a cross-sectional schematic view of an image forming apparatus using a developing device of the present invention. The latent image carrier 1 is
A photosensitive layer 3 is coated with an organic or inorganic photoconductive material on a conductive support 2, and the photosensitive layer 3 is coated with a charger 4 such as a corona charger or a charging roller. After being charged, light emitted from a light source 5 such as a laser or LED is selectively irradiated onto the photosensitive layer 3 according to the image through an imaging optical system 6 to obtain a potential contrast and form an electrostatic latent image. . On the other hand, the developing device 7 conveys and develops the developer 8, and the developer carrier 9 that conveys the developer 8 has an elastic layer 11 and a conductive layer 12 arranged concentrically around the outer periphery of the shaft 10. The developer 8 is frictionally charged with a plate-shaped elastic blade 13 made of metal or resin, and the developer 8 is conveyed in a thin layer by rotating the developer carrier 9 while controlling the amount to an appropriate amount. It is something. The developer carrier 9 is pressed against the latent image carrier 1 at a predetermined pressure, and the developer 8 is pressed up to the pressure contact portion.
When the latent image carrier 1 is conveyed, a developing electric field is formed by the potential contrast and developing bias applying means 14 of the latent image carrier 1, and the developer 8 charged according to the developing electric field adheres to the latent image carrier 1, forming an electrostatic latent image. Be visualized. Furthermore, the image formed by the developer 8 is transferred onto the recording paper 16 using a transfer device 15 such as a corona transfer device or a transfer roller, and the developer 8 is fixed on the recording paper 16 using heat or pressure to form a desired image. This is what is obtained on the recording paper 16.
【００１０】図２は図１の現像装置７で用いた現像剤担
持体９の軸方向断面図である。金属製のシャフト１０の
外周に弾性層１１及び導電層１２をそれぞれ同心円状に
配設してある。弾性層の軸方向端面近傍は導電化処理さ
れ導電弾性層１１ａとなっている。弾性層１０は発泡ゴ
ムで構成してあり、具体的にはシリコーン、ウレタン、
フッソ、エチレンプロピレン、クロロプレンをはじめと
する各種ゴムが使用可能であるが、発泡成形可能な軟質
材料であれば特に材質をゴムに限定するものではなく、
例えばポリウレタン、ポリスチレン、ポリエチレン、エ
ラストマなどの軟質フォームでもよい。シャフト１０の
外周への弾性層１１の形成方法としては、発泡体成形機
を用いてインサート成形により一体的に形成する方法、
円筒状の弾性層１１のみを成形しておき中心にシャフト
１０を挿入する方法がある。導電層１２は導電性塗料を
塗布することにより容易に形成できる。あるいは導電性
の収縮チューブをかぶせることによっても実現できる。
導電弾性層１１ａは弾性層１０の軸方向端面近傍を導電
性塗料中に浸せきして処理することにより形成できる。
図２では両端面に導電弾性層１１ａを形成しているが、
これは片端面のみでも構わない。この結果、シャフト１
０と導電層１２は導電弾性層１１ａを介して電気的に接
続される。FIG. 2 is an axial cross-sectional view of the developer carrier 9 used in the developing device 7 of FIG. An elastic layer 11 and a conductive layer 12 are arranged concentrically around the outer periphery of a metal shaft 10. The vicinity of the end face in the axial direction of the elastic layer is subjected to conductive treatment to form a conductive elastic layer 11a. The elastic layer 10 is made of foamed rubber, specifically silicone, urethane,
Various rubbers including fluorine, ethylene propylene, and chloroprene can be used, but the material is not limited to rubber as long as it is a soft material that can be foamed.
For example, flexible foams such as polyurethane, polystyrene, polyethylene, and elastomer may be used. The method of forming the elastic layer 11 on the outer periphery of the shaft 10 includes a method of integrally forming it by insert molding using a foam molding machine;
There is a method in which only the cylindrical elastic layer 11 is formed and the shaft 10 is inserted into the center. The conductive layer 12 can be easily formed by applying a conductive paint. Alternatively, this can also be achieved by covering it with a conductive shrink tube. The conductive elastic layer 11a can be formed by immersing the vicinity of the axial end face of the elastic layer 10 in a conductive paint. In FIG. 2, conductive elastic layers 11a are formed on both end faces, but
This may be done only on one end side. As a result, shaft 1
0 and the conductive layer 12 are electrically connected via the conductive elastic layer 11a.
【００１１】また発泡体で本発明に示すような弾性層１
１を成形する場合、表面をソリッド表層部（スキン）と
することもあるが、このソリッド表層部も微小な気孔を
有するため気孔表面に導電性塗料が広がり、導電化処理
による導電弾性層１１ａの形成および導電弾性層１１ａ
と導電層１２の電気的接続に関して何ら問題はない。ソ
リッド表層部はなめらかな表面状態を有するので導電層
１２の形成下地ひいては現像剤担地面の性状としては好
ましい。[0011] Also, the elastic layer 1 as shown in the present invention is made of foam.
1, the surface is sometimes made into a solid surface layer (skin), but since this solid surface layer also has minute pores, the conductive paint spreads on the surface of the pores, and the conductive elastic layer 11a is formed by the conductive treatment. Formation and conductive elastic layer 11a
There is no problem with the electrical connection between the conductive layer 12 and the conductive layer 12. Since the solid surface layer portion has a smooth surface condition, it is preferable as a base for forming the conductive layer 12 and a surface for carrying the developer.
【００１２】このようにして製作した現像剤担持体９は
、弾性層１１の軸方向端面近傍のみは導電化処理により
若干硬度が高くなるが、この導電弾性層１１ａはわずか
な領域だけのため弾性層全体としての柔軟性が損ねられ
ることはない。特に導電弾性層１１ａを画像形成範囲よ
りも外側とすれば現像特性上要求される柔軟性について
は全く問題が無い。また弾性層１１のうち導電弾性層１
１ａは適度な深さを有するため、弾性層１１の円周面と
端面との境界稜線部が使用により損傷しても導電層１１
とシャフト１０の電気的接続は保たれる。この効果を得
るには導電弾性層１１ａの端面からの深さを０．５ｍｍ
以上とすると好適である。また弾性層１１はそもそも一
体の材料で構成されているので、弾性層１１のうち導電
化処理してない部分と導電弾性層１１ａとの境界面が分
離することはなく、境界面延長上で導電層１２が切断さ
れることもない。また弾性層１１はそもそも一体の材料
で構成されているので導電弾性層１１ａを含めた弾性層
１１の円周面はつねに同時に成形あるいは加工可能であ
るので、形状的な精度が容易に出せると共に加工工数が
低減できる。また発泡体には単泡体と連泡体があり、弾
性層１１を連泡体とすれば弾性層１１内部の気孔は導電
弾性層１１ａを介して外気と連通するので、温度変化や
圧力変化による現像剤担持体９の変形を防止できる。In the developer carrier 9 manufactured in this manner, the hardness is slightly increased only in the vicinity of the axial end face of the elastic layer 11 due to the conductive treatment, but since the conductive elastic layer 11a is only in a small area, the elasticity is increased. The flexibility of the layer as a whole is not impaired. In particular, if the conductive elastic layer 11a is placed outside the image forming area, there is no problem with the flexibility required for development characteristics. Also, among the elastic layers 11, the conductive elastic layer 1
1a has an appropriate depth, so even if the boundary ridgeline between the circumferential surface and the end surface of the elastic layer 11 is damaged due to use, the conductive layer 11
The electrical connection between the shaft 10 and the shaft 10 is maintained. To obtain this effect, the depth from the end surface of the conductive elastic layer 11a should be 0.5 mm.
The above is preferable. In addition, since the elastic layer 11 is originally made of a single piece of material, the interface between the portion of the elastic layer 11 that has not been made conductive and the conductive elastic layer 11a will not separate, and conductivity will occur on the extension of the interface. The layer 12 is not cut. Furthermore, since the elastic layer 11 is originally composed of a single piece of material, the circumferential surface of the elastic layer 11 including the conductive elastic layer 11a can always be molded or processed at the same time. Man-hours can be reduced. Furthermore, there are two types of foam: single cells and open cells. If the elastic layer 11 is an open cell, the pores inside the elastic layer 11 will communicate with the outside air via the conductive elastic layer 11a, so changes in temperature and pressure will occur. It is possible to prevent deformation of the developer carrier 9 due to the above.
【００１３】（実施例２）図３は本発明の他の実施例に
よる、図２で示した現像剤担持体９の導電層１２の上に
磁性層１７を形成したものである。磁性層１７は磁性塗
料を塗布することにより形成可能である。本構成によれ
ば磁性層１７を着磁して磁性現像剤を用いることにより
磁性現像剤の現像剤担持体９への拘束力が高まるので潜
像担持体への現像剤のカブリを抑えることができる。図
３は導電層１２と磁性層１７を分離してあるが導電性の
磁性塗料あるいは磁性の導電性塗料を用いれば一層のみ
の形成でよいことは明かである。(Embodiment 2) FIG. 3 shows another embodiment of the present invention in which a magnetic layer 17 is formed on the conductive layer 12 of the developer carrier 9 shown in FIG. The magnetic layer 17 can be formed by applying magnetic paint. According to this configuration, by magnetizing the magnetic layer 17 and using a magnetic developer, the binding force of the magnetic developer to the developer carrier 9 is increased, so that fogging of the developer on the latent image carrier can be suppressed. can. In FIG. 3, the conductive layer 12 and the magnetic layer 17 are separated, but it is clear that only one layer may be formed if a conductive magnetic paint or a magnetic conductive paint is used.
【００１４】[0014]
【発明の効果】以上説明したように本発明は、導電性剛
体からなる軸の外周に気孔を有する弾性体からなる弾性
層を配設して、弾性層の表面に導電層を形成し、弾性層
の軸方向端面近傍を導電化処理して導電層と軸の電気的
接続が取れていることを特徴とする現像剤担持体を用い
る現像装置、であり構造が簡単で製造が容易であり長期
間にわたって信頼性の高い現像装置を提供できる。また
本発明によれば柔軟な弾性層と信頼性の高い導電層を有
する現像剤担持体が得られるので接触現像方式あるいは
圧接現像方式に適した現像装置を提供でき、これらの現
像方式の特徴である高解像度な印字が安定して実現でき
る。Effects of the Invention As explained above, the present invention provides an elastic layer made of an elastic material having pores on the outer periphery of a shaft made of a conductive rigid body, and a conductive layer is formed on the surface of the elastic layer. A developing device using a developer carrier characterized in that the vicinity of the axial end face of the layer is treated to be electrically conductive so that an electrical connection between the conductive layer and the shaft is established, and the device has a simple structure, is easy to manufacture, and has a long life. A highly reliable developing device can be provided over a long period of time. Further, according to the present invention, since a developer carrier having a flexible elastic layer and a highly reliable conductive layer can be obtained, it is possible to provide a developing device suitable for a contact development method or a pressure development method. High-resolution printing can be achieved stably.
【図１】本発明の現像装置を用いた画像形成装置の断面
概観図である。FIG. 1 is a cross-sectional schematic diagram of an image forming apparatus using a developing device of the present invention.
【図２】本発明の現像装置に用いる現像剤担持体の軸方
向断面図である。FIG. 2 is an axial cross-sectional view of a developer carrier used in the developing device of the present invention.
【図３】本発明の他の実施例における現像剤担持体の軸
方向断面図である。FIG. 3 is an axial cross-sectional view of a developer carrier in another embodiment of the present invention.
【符号の説明】 １ 潜像担持体 ２ 導電性の支持部 ３ 感光層 ４ 帯電器 ５ 光源 ６ 結像光学系 ７ 現像装置 ８ 現像剤 ９ 現像剤担持体 １０ シャフト １１ 弾性層 １１ａ 導電弾性層 １２ 導電層 １３ 弾性ブレード １４ 現像バイアス印加手段 １５ 転写器 １６ 記録紙 １７ 磁性層[Explanation of symbols] 1 Latent image carrier 2 Conductive support part 3 Photosensitive layer 4 Charger 5 Light source 6 Imaging optical system 7 Developing device 8. Developer 9 Developer carrier 10 Shaft 11 Elastic layer 11a Conductive elastic layer 12 Conductive layer 13 Elastic blade 14 Development bias application means 15 Transfer device 16 Recording paper 17 Magnetic layer
Claims (3)
前記現像剤を潜像担持体に現像する現像装置において、
前記現像剤担持体は少なくとも導電性剛体からなる軸の
外周に気孔を有する弾性体からなる弾性層を配設したも
のであり、前記弾性層の表面に導電層を形成し、前記弾
性層の軸方向端面近傍は導電化処理されかつ前記導電層
および前記軸とが電気的に接続していることを特徴とす
る現像装置。[Claim 1] A developer is transported by a developer carrier,
A developing device that develops the developer onto a latent image carrier,
The developer carrier has an elastic layer made of an elastic material having pores disposed on the outer periphery of at least a shaft made of a conductive rigid body, a conductive layer is formed on the surface of the elastic layer, and a conductive layer is formed on the surface of the elastic layer. A developing device characterized in that the vicinity of the directional end face is treated to be conductive, and the conductive layer and the shaft are electrically connected.
らの深さが０．５ｍｍ以上の範囲にわたって導電化処理
してあることを特徴とする請求項１記載の現像装置。2. The developing device according to claim 1, wherein the vicinity of the axial end face of the elastic layer is treated to be electrically conductive to a depth of 0.5 mm or more from the end face.
層の軸方向端面近傍が導電化処理してあることを特徴と
する請求項１または２記載の現像装置。3. The developing device according to claim 1, wherein the vicinity of the axial end face of the elastic layer outside the image forming area is subjected to a conductive treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3051247A JPH04285979A (en) | 1991-03-15 | 1991-03-15 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3051247A JPH04285979A (en) | 1991-03-15 | 1991-03-15 | Developing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04285979A true JPH04285979A (en) | 1992-10-12 |
Family
ID=12881626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3051247A Pending JPH04285979A (en) | 1991-03-15 | 1991-03-15 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04285979A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5481341A (en) * | 1993-08-18 | 1996-01-02 | Xerox Corporation | Roller for controlling application of carrier liquid |
-
1991
- 1991-03-15 JP JP3051247A patent/JPH04285979A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5481341A (en) * | 1993-08-18 | 1996-01-02 | Xerox Corporation | Roller for controlling application of carrier liquid |
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