JPH047568A - Conductive roll - Google Patents
Conductive rollInfo
- Publication number
- JPH047568A JPH047568A JP2105881A JP10588190A JPH047568A JP H047568 A JPH047568 A JP H047568A JP 2105881 A JP2105881 A JP 2105881A JP 10588190 A JP10588190 A JP 10588190A JP H047568 A JPH047568 A JP H047568A
- Authority
- JP
- Japan
- Prior art keywords
- conductive
- conductive layer
- roll
- powder
- toner
- 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
- 239000000843 powder Substances 0.000 claims abstract description 27
- 239000000919 ceramic Substances 0.000 claims abstract description 14
- 239000003973 paint Substances 0.000 claims description 17
- 239000011521 glass Substances 0.000 claims description 10
- 150000002902 organometallic compounds Chemical class 0.000 claims description 5
- 239000002184 metal Substances 0.000 abstract description 17
- 238000000576 coating method Methods 0.000 abstract description 9
- 239000011248 coating agent Substances 0.000 abstract description 8
- 230000007774 longterm Effects 0.000 abstract description 6
- 238000005507 spraying Methods 0.000 abstract description 4
- 238000007598 dipping method Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract 4
- 239000010410 layer Substances 0.000 description 24
- 230000000052 comparative effect Effects 0.000 description 7
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229920001568 phenolic resin Polymers 0.000 description 5
- 239000005011 phenolic resin Substances 0.000 description 5
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 150000002736 metal compounds Chemical class 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 206010047571 Visual impairment Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 230000003254 anti-foaming effect Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- -1 nO□ Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、電子写真複写機の現像ロール等として用い
られる導電性ロールに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a conductive roll used as a developing roll of an electrophotographic copying machine.
電子写真複写機は、感光ドラムの表面に原稿像を静電潜
像として形成し、これにトナーを付着させてトナー像を
形成したのち、このトナー像を複写紙に転写することに
より複写を行うものである。この種の電子写真複写機は
、一般に第１図のような構成で、つぎのようにして複写
が行われる。An electrophotographic copying machine forms a document image as an electrostatic latent image on the surface of a photosensitive drum, attaches toner to this to form a toner image, and then copies this toner image by transferring it to copy paper. It is something. This type of electrophotographic copying machine generally has a configuration as shown in FIG. 1, and copies are made in the following manner.
すなわち、まず軸１ａを中心に矢印方向に回転する感光
ドラム１の外表面が、コロトロン２により帯電される。That is, first, the outer surface of the photosensitive drum 1, which rotates in the direction of the arrow around the shaft 1a, is charged by the corotron 2.
３は露光機構部で、ここを介して原稿光像のスリット露
光８が感光ドラム１に到達し、原稿像に対応した静電潜
像が感光ドラム１表面に形成される。４はケース４ａ内
に内蔵された現像ロールで、上記静電潜像に対してケー
ス４ａ内のトナーを付着させて感光ドラム１表面にトナ
ー像を形成させる。このトナー像が、給紙ローラ６によ
って矢印のように移送されてきた複写紙１１に転写され
、定着ロール７によって複写紙ｌｌ上に定着される。こ
のようにして複写が行われる。Reference numeral 3 denotes an exposure mechanism section through which slit exposure 8 of the original optical image reaches the photosensitive drum 1, and an electrostatic latent image corresponding to the original image is formed on the surface of the photosensitive drum 1. A developing roll 4 is built in the case 4a, and causes the toner in the case 4a to adhere to the electrostatic latent image to form a toner image on the surface of the photosensitive drum 1. This toner image is transferred onto the copy paper 11, which is being transported in the direction of the arrow, by the paper feed roller 6, and is fixed onto the copy paper 11 by the fixing roll 7. Copying is performed in this manner.
なお、９は感光ドラム１表面の転写残像や残存トナーを
除去するクリーナー、１０は感光ドラム１を零電化して
つぎの帯電に備えさせるイレーサーランプである。Note that 9 is a cleaner that removes transfer afterimages and residual toner on the surface of the photosensitive drum 1, and 10 is an eraser lamp that zeroes the photosensitive drum 1 and prepares it for the next charging.
このような電子写真複写機では、現像ロール４として、
従来から、非磁性トナーを用いる場合には、第２図に示
すように、芯金２１の外周に導電層２２が形成されたも
のが用いられ、磁性トナーを用いる場合には、第３図に
示すように、マグネット芯２３の外周に三層構造の導電
層２４．２５２６が形成されたものが用いられている。In such an electrophotographic copying machine, as the developing roll 4,
Conventionally, when using non-magnetic toner, a conductive layer 22 is formed around the outer periphery of a core bar 21 as shown in FIG. 2, and when using magnetic toner, as shown in FIG. As shown, a magnet core 23 in which a three-layer conductive layer 24.2526 is formed around the outer periphery of the magnet core 23 is used.
そして、これらの現像ロール４の表面は、トナー搬送が
なされやすいように、研磨等の仕上げ加工によって粗面
化されている。The surfaces of these developing rolls 4 are roughened by finishing such as polishing so that the toner can be easily transported.
このような現像ロール４の導電層２２〜２６は、通常、
金属か、もしくは導電性粉末入りフェノール樹脂によっ
て形成されている。しかしながら、金属は完全な導電体
であるため、電荷が逃げてトナーを充分に帯電させるこ
とができないという難点がある。これに対し、導電性粉
末入りフェノール樹脂を用いると、トナーの帯電は充分
に行えるものの、表面が摩耗しやすいため、使用を繰り
返すにつれ粗面が摩耗してトナーをうまく搬送できなく
なるという問題を生じる。また、上記導電性粉末入りフ
ェノール樹脂を用いる場合には、樹脂組成物を押し出し
成形によって筒状に成形したのち芯金に被せるという製
法をとるため、手間が煩雑であった。The conductive layers 22 to 26 of the developing roll 4 are usually
It is made of metal or phenolic resin with conductive powder. However, since metal is a perfect conductor, there is a problem in that the charge escapes and the toner cannot be sufficiently charged. On the other hand, when phenolic resin containing conductive powder is used, the toner can be sufficiently charged, but the surface is easily abraded, resulting in the problem that with repeated use, the rough surface is worn away and the toner cannot be transported properly. . In addition, when using the above-mentioned phenolic resin containing conductive powder, a manufacturing method is used in which the resin composition is formed into a cylindrical shape by extrusion molding and then covered with a core metal, which is laborious and time-consuming.
この発明は、このような事情に鑑みなされたもので、ト
ナーへの帯電が充分で、摩耗しにくく、しかも製造が容
易な導電性ロールの提供をその目的とする。The present invention was made in view of the above circumstances, and an object of the present invention is to provide a conductive roll that sufficiently charges toner, is resistant to wear, and is easy to manufacture.
〔課題を解決するための手段］
上記の目的を達成するため、この発明の導電性ロールは
、軸体の外周に導電層が形成された導電性ロールであっ
て、上記導電層が、膜形成能を有する有機金属化合物を
主成分とし導電性粉末を含有したセラミック塗料によっ
て形成されているという構成をとる。[Means for Solving the Problems] In order to achieve the above object, the conductive roll of the present invention is a conductive roll in which a conductive layer is formed on the outer periphery of a shaft body, the conductive layer forming a film. The main component is a ceramic paint containing a conductive powder and an organometallic compound that has the ability to function as a main component.
すなわち、この発明の導電性ロールは、導電層を、膜形
成能を有する有機金属化合物を主成分とし導電性粉末を
含有したセラミック塗料によって形成したものである。That is, in the conductive roll of the present invention, the conductive layer is formed from a ceramic paint containing an electroconductive powder and containing an organic metal compound having a film-forming ability as a main component.
したがって、この導電層は硬質で、長期の使用によって
も摩耗しにくいという特長を有する。また、上記特殊な
塗料を、スプレーコーティングやディッピング等によっ
て軸体表面に塗布するだけで簡単に導電層を形成するこ
とができるため、その製造が容易となる。しかも、上記
塗料調製時に導電性粉末の添加量を変えることで、得ら
れる導電層の電気抵抗を簡単に操作することができるた
め、トナーに対する帯電量を容易にコントロールするこ
とができる。Therefore, this conductive layer is hard and has the advantage of being resistant to wear even after long-term use. Further, since the conductive layer can be easily formed by simply applying the above-mentioned special paint to the surface of the shaft by spray coating, dipping, etc., manufacturing thereof is facilitated. In addition, by changing the amount of conductive powder added during the preparation of the paint, the electrical resistance of the resulting conductive layer can be easily controlled, so the amount of charge on the toner can be easily controlled.
つぎに、この発明の詳細な説明する。Next, this invention will be explained in detail.
この発明の導電性ロールは、軸体と、その外周に形成さ
れる導電層とから構成されている。The conductive roll of the present invention is composed of a shaft and a conductive layer formed on the outer periphery of the shaft.
上記軸体としては、特に限定するものではなく、金属製
の中実体や内部が中空の、いわゆる「芯金」があげられ
る。また、上記芯金の外周面に、弾性ゴム層あるいは他
の導電層等、各種の層が単層、あるいは積層形成された
ものであっても差し支えない。The shaft body is not particularly limited, and examples thereof include a metal solid body and a so-called "core metal" having a hollow interior. Moreover, various layers such as an elastic rubber layer or other conductive layer may be formed as a single layer or in a laminated manner on the outer peripheral surface of the core metal.
また、上記軸体の外周に形成される導電層は、膜形成能
を有する有機金属化合物を主成分とし導電性粉末を含有
したセラミック塗料によって形成されたものである。そ
して、その厚みは、一般に２〜１００μｍに設定され、
特に５〜３０μｍが好適である。Further, the conductive layer formed on the outer periphery of the shaft is formed of a ceramic paint containing conductive powder and containing an organic metal compound having film-forming ability as a main component. The thickness is generally set to 2 to 100 μm,
Particularly suitable is 5 to 30 μm.
上記セラミック塗料の主成分となる、膜形成能を有する
有機金属化合物とは、金属に炭素が結合したもののみな
らず、金属に酸素、硫黄、窒素等が結合したものも含ま
れる。これらのうち、特に一般式がＭ（ＯＲ）ｎ（ただ
しＭはＳｔ、Ｔｉ、Ａｌ１．Ｓｎ等の金属でＲはメチル
、エチル、ブチル等のアルキル基である）で表されるれ
る金属アルコキシドや、一般式Ｍ （ＯＣＯＲ）ｎ
（ただしＭはＳｔ、Ｔｉ、Ａｒ１．、Ｚｒ等の金属でＲ
はメチル、エチル、ブチル等のアルキル基である）で表
される金属アシレートが好適である。これらは、環境安
定性に優れ、また形成される塗膜の硬度が高い点で有利
である。The organometallic compound having film-forming ability, which is the main component of the ceramic paint, includes not only those in which carbon is bonded to a metal, but also those in which oxygen, sulfur, nitrogen, etc. are bonded to a metal. Among these, metal alkoxides whose general formula is M(OR)n (where M is a metal such as St, Ti, Al1.Sn, etc. and R is an alkyl group such as methyl, ethyl, butyl), , general formula M (OCOR)n
(However, M is a metal such as St, Ti, Ar1., Zr, etc.)
is an alkyl group such as methyl, ethyl, butyl, etc.) is preferred. These are advantageous in that they have excellent environmental stability and the hardness of the coating film formed is high.
また、上記セラミック塗料中に含有される導電性粉末と
しては、トナー帯電を充分に行わせる必要から、除電効
果の少ないもの、すなわち電気抵抗が低くなりすぎない
もの（１０°Ω・ｃｍ＜Ｒｖ）が望ましい。具体的には
、ｃ−ＺｎＯ（１０２Ω・ｃｍ） 、 Ｋｚ Ｔ ｉ
ｚ Ｏｓ （１０°〜１０５）。In addition, as the conductive powder contained in the above-mentioned ceramic paint, it is necessary to charge the toner sufficiently, so it is necessary to use a powder that has a low static elimination effect, that is, a powder that does not have an excessively low electrical resistance (10°Ωcm<Rv). is desirable. Specifically, c-ZnO (102Ω・cm), Kz Ti
z Os (10° to 105).
ｃ−ＴｉＯｚ （１０°〜１０２Ω・ｃｍ）、ｃ−３
ｎＯ□、ｃ−３ｂＯ，等の金属酸化物があげられる（上
記「Ｃ−」とは導電性を有することを意味する）。c-TiOz (10° ~ 102Ω・cm), c-3
Examples include metal oxides such as nO□, c-3bO, etc. (the above "C-" means having conductivity).
なお、この発明の導電層形成用のセラミック塗料には、
必要に応じてガラス粉末、シリカ等の粘度調整剤、消泡
シリコン等の消泡剤等を配合することができる。特に、
上記ガラス粉末を配合する場合には、その粒子径と配合
割合を調整することにより、得られる塗膜表面を適度な
粗面（面粗さＲａが０．１〜０．８μｍ）にすることが
できる。したがって、上記ガラス粉末を配合することに
より、従来は必要であった粗面加工が不要となり、工程
の簡略化を図ることができる。このように、配合するガ
ラス粉末によって塗膜表面を粗面化させる場合には、ガ
ラス粉末の平均粒子径を１０〜３０μｍに設定し、しか
もその配合量を、前記有機金属化合物１００重量部に対
して３０〜１００重量部に設定することが好適である。Note that the ceramic paint for forming a conductive layer of this invention includes:
If necessary, glass powder, a viscosity modifier such as silica, an antifoaming agent such as antifoaming silicone, etc. can be blended. especially,
When blending the above glass powder, the resulting coating surface can be made to have an appropriate roughness (surface roughness Ra is 0.1 to 0.8 μm) by adjusting its particle size and blending ratio. can. Therefore, by blending the above-mentioned glass powder, surface roughening, which was conventionally necessary, becomes unnecessary, and the process can be simplified. In this way, when the surface of the coating film is roughened by the glass powder to be mixed, the average particle size of the glass powder is set to 10 to 30 μm, and the amount of the glass powder to be mixed is adjusted to 100 parts by weight of the organometallic compound. It is preferable to set the content to 30 to 100 parts by weight.
この発明の導電性ロールは、上記各原料を用い、例えば
つぎのようにして製造することができる。すなわち、上
記各原料を、ボールミル等を用いて混合、撹拌し、この
混合物を適当な溶剤（メタノール、エタノール等）に溶
解して塗料をつくる。そして、この塗料を、デイツプ法
、ロールコート法、スプレーコーティング法等によって
金属製の軸体表面に均一厚みに塗工したのち、焼結等に
よって上記塗膜を硬化して目的とする導電性ロールを得
ることができる。The conductive roll of the present invention can be manufactured using the above-mentioned raw materials, for example, in the following manner. That is, the above raw materials are mixed and stirred using a ball mill or the like, and the mixture is dissolved in a suitable solvent (methanol, ethanol, etc.) to produce a paint. Then, this paint is applied to the surface of the metal shaft to a uniform thickness by dip method, roll coating method, spray coating method, etc., and then the coating film is hardened by sintering etc. to form the desired conductive roll. can be obtained.
このようにして得られた導電性ロールは、導電層が硬質
で、従来のフェノール樹脂を主成分とするものに比べ、
耐摩耗性に優れており、電子写真複写機等に組み込んだ
場合に、長期の使用によっても摩耗することがなく、ト
ナー運搬を安定的に行うことができる。また、導電層形
成用のセラミック塗料に含有させる導電性粉末の量を調
整することにより、目的に応じた電気抵抗を、導電層に
付与することができる。さらに、上記セラミック塗料に
前記ガラス粉末を含有させたものは、得られる導電層表
面が適度な粗面となるため、あとから粗面仕上げ加工を
する必要がなく、そのまま電子写真複写機等に組み込ん
で使用に供することができる。The conductive roll obtained in this way has a hard conductive layer, and compared to conventional rolls whose main component is phenolic resin,
It has excellent abrasion resistance, and when incorporated into an electrophotographic copying machine, etc., it does not wear out even after long-term use, and can stably transport toner. Further, by adjusting the amount of conductive powder contained in the ceramic paint for forming the conductive layer, it is possible to impart electrical resistance to the conductive layer according to the purpose. Furthermore, since the ceramic paint containing the glass powder has a moderately roughened conductive layer surface, there is no need to roughen the surface afterwards, and it can be incorporated into an electrophotographic copying machine, etc. as it is. can be made available for use.
つぎに、実施例について比較例と併せて説明する。Next, examples will be described together with comparative examples.
〔実施例１〜５、比較例１．２〕
下記の表に示す原料を用い、上記製法に従って四種類の
実施別品を作製した。また、比較例として、ステンレス
製の金属ロールのみからなるロール（比較例１品）と、
金属製ロールの外周に導電性粉末含有フェノール樹脂か
らなるパイプを被せたロール（比較例２品）を準備した
。[Examples 1 to 5, Comparative Example 1.2] Using the raw materials shown in the table below, four different products were produced according to the above manufacturing method. In addition, as a comparative example, a roll made only of stainless steel metal rolls (comparative example 1 product),
A roll (comparative example 2 product) was prepared by covering the outer periphery of a metal roll with a pipe made of a phenolic resin containing conductive powder.
これらのロールについて、外周面の電気抵抗。For these rolls, the electrical resistance of the outer circumferential surface.
硬度（鉛筆硬度）および面粗度を測定するとともに、実
際に電子写真複写機に上記各ロールを組み込んで連続的
に複写を行い、初期の段階でのトナー帯電量と、１０万
枚複写後のトナー帯電量を、吸引ファラデー法によって
測定した。帯電量の測定結果については、比較例２品の
初期帯電量を１００とする指数で表すことにした。In addition to measuring the hardness (pencil hardness) and surface roughness, each of the rolls mentioned above was actually installed in an electrophotographic copying machine and copies were made continuously, and the toner charge amount at the initial stage and after 100,000 copies were The amount of toner charge was measured by the attraction Faraday method. The measurement results of the amount of charge were expressed as an index, with the initial amount of charge of Comparative Example 2 as 100.
これらの結果を下記の表に併せて示す。These results are also shown in the table below.
（以下余白）
上記の結果から、実施別品はいずれも比較別品に比べて
表面硬度が高く、耐摩耗性に優れていることがわかる。(Hereinafter, blank spaces) From the above results, it can be seen that all of the tested products had higher surface hardness and superior wear resistance than the comparative products.
したがって、長期の使用によっても、トナーの帯電量が
あまり変わらない。また、ガラス粉末を配合した実施例
１〜４品は、仕上げ加工を施さなくても表面が粗くなっ
ており、仕上げ加工が不要であることがわかる。Therefore, even after long-term use, the amount of charge on the toner does not change much. Furthermore, the products of Examples 1 to 4 in which glass powder was blended had rough surfaces even without finishing, indicating that finishing was unnecessary.
以上のように、この発明の導電性ロールは、導電層が、
膜形成能を有する有機金属化合物を主成分とし導電性粉
末を含有した特殊なセラミック塗料によって形成されて
いるため、導電層が硬質で、長期の使用によっても摩耗
しにくいという特長を有する。また、上記特殊な塗料を
、スプレーコーティングやディッピング等によって軸体
表面に塗布するだけで簡単に導電層を形成することがで
きるため、その製造が容易である。しかも、上記塗料調
製時に導電性粉末の添加量を変えることで、得られる導
電層の電気抵抗を簡単に操作することができるため、ト
ナーに対する帯電量を容易にコントロールすることがで
きる。As described above, in the conductive roll of the present invention, the conductive layer is
The conductive layer is hard and resistant to wear even after long-term use, as it is formed from a special ceramic paint containing conductive powder and an organometallic compound with film-forming ability as its main component. In addition, the conductive layer can be easily formed by simply applying the above-mentioned special paint to the surface of the shaft body by spray coating, dipping, etc., and therefore, it is easy to manufacture. In addition, by changing the amount of conductive powder added during the preparation of the paint, the electrical resistance of the resulting conductive layer can be easily controlled, so the amount of charge on the toner can be easily controlled.
第１図はこの発明の導電性ロールが組み込まれる電子写
真複写機の構成図、第２図および第３図はそれぞれ現像
ロールの構成を示す断面図である。
特許出願人 東海ゴム工業株式会社
代理人 弁理士 西 藤 征 彦FIG. 1 is a block diagram of an electrophotographic copying machine incorporating the conductive roll of the present invention, and FIGS. 2 and 3 are sectional views showing the structure of a developing roll. Patent applicant: Tokai Rubber Industries Co., Ltd. Agent: Yukihiko Nishifuji, patent attorney
Claims (2)
あつて、上記導電層が、膜形成能を有する有機金属化合
物を主成分とし導電性粉末を含有したセラミック塗料に
よつて形成されていることを特徴とする導電性ロール。(1) A conductive roll with a conductive layer formed on the outer periphery of the shaft, the conductive layer being formed from a ceramic paint containing conductive powder and mainly composed of an organometallic compound with film-forming ability. A conductive roll characterized by:
り、このガラス粉末によつて導電層表面が粗面化されて
いる請求項（１）記載の導電性ロール。(2) The conductive roll according to claim (1), wherein the ceramic paint contains glass powder, and the surface of the conductive layer is roughened by the glass powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2105881A JPH047568A (en) | 1990-04-20 | 1990-04-20 | Conductive roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2105881A JPH047568A (en) | 1990-04-20 | 1990-04-20 | Conductive roll |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH047568A true JPH047568A (en) | 1992-01-10 |
Family
ID=14419277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2105881A Pending JPH047568A (en) | 1990-04-20 | 1990-04-20 | Conductive roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH047568A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5563690A (en) * | 1992-01-16 | 1996-10-08 | Canon Kabushiki Kaisha | Developing sleeve having an outer ceramic layer developing device for developing electrostatic latent images, and image-forming apparatus |
| US6668148B2 (en) | 2000-12-20 | 2003-12-23 | Ricoh Company, Ltd. | Latent electrostatic image developing apparatus and image forming apparatus including such developing apparatus |
-
1990
- 1990-04-20 JP JP2105881A patent/JPH047568A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5563690A (en) * | 1992-01-16 | 1996-10-08 | Canon Kabushiki Kaisha | Developing sleeve having an outer ceramic layer developing device for developing electrostatic latent images, and image-forming apparatus |
| US6668148B2 (en) | 2000-12-20 | 2003-12-23 | Ricoh Company, Ltd. | Latent electrostatic image developing apparatus and image forming apparatus including such developing apparatus |
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