JP2002082514A - Elastic roll - Google Patents
Elastic rollInfo
- Publication number
- JP2002082514A JP2002082514A JP2000269156A JP2000269156A JP2002082514A JP 2002082514 A JP2002082514 A JP 2002082514A JP 2000269156 A JP2000269156 A JP 2000269156A JP 2000269156 A JP2000269156 A JP 2000269156A JP 2002082514 A JP2002082514 A JP 2002082514A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- elastic
- layer
- elastic roll
- acrylic monomer
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電子写真方式の画
像形成装置等において用いることのできる弾性ロールに
関し、特に感光体に対し帯電処理や転写、現像などを行
う導電性ロールに適したものであるBACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic roll that can be used in an electrophotographic image forming apparatus and the like, and more particularly to an elastic roll suitable for a conductive roll for performing charging, transfer, and development on a photoreceptor. is there
【０００２】[0002]
【従来技術】電子写真方式を利用した画像形成装置で
は、感光体表面に静電潜像を形成して、これにトナーを
付着させてトナー像を形成し、このトナー像を複写機に
転写することにより画像を形成する。かかる電子写真プ
ロセスでは、感光体表面に静電潜像を形成するに当た
り、予め感光体表面を帯電させる必要がある。そして、
このように感光体表面を帯電させる方法として、従来よ
り、コロナ放電方式または摩擦帯電方式が知られてい
る。ここで、コロナ放電方式は高圧電源を必要とし、装
置的に複雑になると共に高価であるので、高圧電源を必
要とせずに装置的に簡便な摩擦帯電方式が注目されてい
る。摩擦帯電方式は、例えば、バイアス電圧を印加した
帯電ロールを感光体表面に摺接させて感光体表面を帯電
させるというものである。2. Description of the Related Art In an image forming apparatus using an electrophotographic system, an electrostatic latent image is formed on a surface of a photoreceptor, toner is adhered to the latent image to form a toner image, and the toner image is transferred to a copying machine. Thus, an image is formed. In such an electrophotographic process, it is necessary to charge the surface of the photoconductor in advance before forming an electrostatic latent image on the surface of the photoconductor. And
As a method for charging the surface of the photoreceptor in this manner, a corona discharge method or a friction charging method is conventionally known. Here, the corona discharge method requires a high-voltage power supply, and is complicated and expensive in terms of equipment. Therefore, a triboelectric charging method which does not require a high-voltage power supply and is simple in equipment is attracting attention. In the triboelectric charging method, for example, a charging roll to which a bias voltage is applied is slid in contact with the surface of the photoconductor to charge the surface of the photoconductor.
【０００３】摩擦帯電方式に採用される帯電ロールのな
かでも、良好な印字特性を与えるものとして、半導電性
弾性層にエピクロルヒドリンゴムを用いたものが多数提
案されている。例えば、特開平１０−４５９５３号公報
には、エピクロルヒドリンゴム弾性ロール表面に加熱に
よって表面含浸ポリイソシアネート化合物を硬化反応さ
せる方法が、また、特開平１１−１４９２０１号公報に
は、エピクロルヒドリンゴム弾性ロール表面に紫外線を
照射する方法がそれぞれ開示されている。[0003] Among charging rolls used in the triboelectric charging system, there have been proposed a large number of those using epichlorohydrin rubber for a semiconductive elastic layer as those giving good printing characteristics. For example, Japanese Patent Application Laid-Open No. 10-45553 discloses a method in which a surface-impregnated polyisocyanate compound is cured by heating the surface of an epichlorohydrin rubber elastic roll, and Japanese Patent Application Laid-Open No. 11-149201 discloses a method in which the surface of an epichlorohydrin rubber elastic roll is cured. A method of irradiating ultraviolet rays is disclosed.
【０００４】更に、上記以外にも、印字面に接触痕とし
て現れる帯電ロールの感光体表面に与えるダメージ防止
として表面コーテイング、チューブ被覆等、様々な試み
がなされている。In addition to the above, various attempts have been made to prevent damage to the surface of the photoreceptor of the charging roll, which appears as a contact mark on the printing surface, such as surface coating and tube coating.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、エピク
ロルヒドリンゴム弾性ロール表面に加熱によって表面含
浸ポリイソシアネート化合物を硬化反応させる方法にお
いては、処理液の安定性に問題があり、その取り扱いが
煩雑なものとなっていた。However, in the method of curing the surface impregnated polyisocyanate compound by heating the surface of the epichlorohydrin rubber elastic roll by heating, there is a problem in the stability of the treatment liquid, and the handling becomes complicated. I was
【０００６】また、エピクロルヒドリンゴム弾性ロール
表面に紫外線を照射するのみでは、印字特性に改善はみ
られるものの、充分なものではないという問題があっ
た。[0006] In addition, when the surface of the epichlorohydrin rubber elastic roll is merely irradiated with ultraviolet rays, the printing characteristics are improved, but there is a problem that it is not sufficient.
【０００７】本発明は、煩雑な表面硬化処理工程を有す
ることなく良好な高硬度表面処理層を有する弾性ロール
を提供することを課題とする。An object of the present invention is to provide an elastic roll having a good high hardness surface treatment layer without a complicated surface hardening step.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、前記課題
を達成するために、鋭意研究を重ねた結果、帯電ロール
のエピクロルヒドリンゴム弾性体表面に感放射線性を有
するアクリルモノマーを含浸させ、次いで紫外線又は電
子線照射によってアクリルモノマーを重合し、表面近傍
を硬化することで良好な表面処理層が形成でき、特に画
像品質を与える帯電ロールに用いて有用であることを知
見し本発明を完成するに至った。Means for Solving the Problems The present inventors have conducted intensive studies in order to achieve the above object, and as a result, impregnated a radiation-sensitive acrylic monomer on the surface of the epichlorohydrin rubber elastic body of the charging roll, The acrylic monomer is then polymerized by ultraviolet or electron beam irradiation, and a good surface treatment layer can be formed by curing the vicinity of the surface. I came to.
【０００９】即ち、前記課題を解決する本発明の第１の
態様は、芯金表面に、エピクロルヒドリンゴムを主体と
する弾性層を有する弾性ロールであって、前記弾性層の
表面に、感放射線性アクリルモノマーを含浸させた後紫
外線または電子線を照射することにより形成した表面処
理層を具備することを特徴とする弾性ロールにある。That is, a first aspect of the present invention to solve the above-mentioned problem is an elastic roll having an elastic layer mainly composed of epichlorohydrin rubber on the surface of a cored bar. An elastic roll comprising a surface treatment layer formed by irradiating an ultraviolet ray or an electron beam after impregnating with an acrylic monomer.
【００１０】本発明の第２の態様は、第１の態様におい
て、前記感放射線性アクリルモノマーが、分子内に２個
以上のアクリロイル基を有することを特徴とする弾性ロ
ールにある。A second aspect of the present invention is the elastic roll according to the first aspect, wherein the radiation-sensitive acrylic monomer has two or more acryloyl groups in a molecule.
【００１１】本発明の第３の態様は、第１又は２の態様
において、前記ロールが、導電性を有していることを特
徴とする弾性ロールにある。A third aspect of the present invention is the elastic roll according to the first or second aspect, wherein the roll has conductivity.
【００１２】かかる本発明の弾性ロールは、エピクロル
ヒドリンゴムを主体とする弾性層を直接芯金に設けた構
造であるので、電気的特性が均一な導電性ロールとして
有用である。このような導電性を有するエピクロルヒド
リン弾性層には、必要に応じて、導電性カーボン、イオ
ン化導電剤を添加し、さらに、本発明の効果を損ねない
範囲で、適宜他の充填剤を添加することができる。Since the elastic roll of the present invention has a structure in which an elastic layer mainly composed of epichlorohydrin rubber is directly provided on a cored bar, it is useful as a conductive roll having uniform electric characteristics. To the epichlorohydrin elastic layer having such conductivity, if necessary, conductive carbon and an ionized conductive agent are added, and other fillers are appropriately added as long as the effects of the present invention are not impaired. Can be.
【００１３】本発明では、エピクロルヒドリン弾性層に
感放射線性アクリルモノマーを含浸させた後、紫外線又
は電子線を照射し当該アクリルモノマーを重合硬化する
という表面硬化処理を施すことにより、表面処理層を形
成しているので、電気特性の環境依存性も低く、感光体
への汚染やダメージの虞のない弾性ロールが提供でき
る。In the present invention, a surface-treated layer is formed by impregnating the epichlorohydrin elastic layer with a radiation-sensitive acrylic monomer and then irradiating ultraviolet rays or an electron beam to polymerize and cure the acrylic monomer. As a result, an elastic roll can be provided which has low environmental dependence of electrical characteristics and is free from contamination or damage to the photoreceptor.
【００１４】本発明に使用可能なアクリルモノマーとし
ては、放射線、特に紫外線に対する感受性を有するもの
であれば特に限定はされず、例えば、アクリル酸エステ
ル誘導体、メタアクリル酸エステル誘導体等を用いるこ
とができるが、なかでも好適な例として、分子内にアク
リロイル基を２個以上、特に、好適には３〜５個以上有
するものがあげられる。具体例としては、ペンタエリス
リトールテトラアクリレート、ジペンタエリスリトール
ペンタアクリレート等が挙げられる。The acrylic monomer that can be used in the present invention is not particularly limited as long as it has sensitivity to radiation, particularly ultraviolet rays, and examples thereof include acrylate derivatives and methacrylate derivatives. However, a preferable example is a compound having two or more, particularly preferably three to five or more acryloyl groups in a molecule. Specific examples include pentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, and the like.
【００１５】本発明で用いられる感放射線アクリルモノ
マーは、有機溶媒に溶解させて処理溶液として用いる。
これらの化合物を溶解する有機溶媒としては、アクリル
モノマーを溶解し、エピクロルヒドリンゴムに悪い影響
を及ぼさないもので且つ含浸し易いものであれば特に限
定されず、アセトン、酢酸エチル、メチルエチルケトン
等を用いるのが好ましく、特に、アセトンあるいはこれ
らの混合物を用いるのが好ましい。これらの有機溶媒の
量は、本発明の硬化処理を行う処理溶液の粘度が１００
ｃ．ｐ．以下、好ましくは５０ｃ．ｐ．以下となるよう
に調整されるのが好ましい。The radiation-sensitive acrylic monomer used in the present invention is dissolved in an organic solvent and used as a processing solution.
The organic solvent for dissolving these compounds is not particularly limited as long as it dissolves the acrylic monomer and does not adversely affect the epichlorohydrin rubber and is easily impregnated.Acetone, ethyl acetate, methyl ethyl ketone and the like are used. It is particularly preferable to use acetone or a mixture thereof. The amount of these organic solvents is such that the viscosity of the treatment solution for performing the curing treatment of the present invention is 100
c. p. Or less, preferably 50 c. p. Preferably, the adjustment is made as follows.
【００１６】本発明では、感放射線性アクリルモノマー
処理液を含浸した後、エピクロルヒドリン弾性体表面近
傍に紫外線または電子線を照射することにより、前記ア
クリルモノマーを重合硬化させ、前記エピクロルヒドリ
ン弾性体表面近傍に重合マトリクスからなる表面処理層
を形成する。In the present invention, after impregnating with the radiation-sensitive acrylic monomer treatment liquid, the acrylic monomer is polymerized and cured by irradiating the vicinity of the surface of the epichlorohydrin elastic body with ultraviolet light or an electron beam, and the vicinity of the surface of the epichlorohydrin elastic body is cured. A surface treatment layer composed of a polymerization matrix is formed.
【００１７】本発明において、照射する紫外線又は電子
線に関しては、含浸させた感放射線アクリルモノマーを
硬化させ且つ帯電ロールに使用するエピクロルヒドリン
ゴム弾性層に悪影響を与えない波長、照度、照射時間が
設定される。In the present invention, with respect to the ultraviolet ray or electron beam to be irradiated, the wavelength, illuminance and irradiation time are set so that the impregnated radiation-sensitive acrylic monomer is cured and does not adversely affect the epichlorohydrin rubber elastic layer used for the charging roll. You.
【００１８】また、本発明の弾性ロールの製造では、紫
外線または電子線をロール表面に一様に照射する必要が
あるが、そのための方法としては、例えば、紫外線光源
または電子線源に対してロールを回転させるものや、ロ
ールをコンベアで搬送しながら紫外線をロールの上下か
ら照射する方式などが採用できる。Further, in the production of the elastic roll of the present invention, it is necessary to uniformly irradiate the surface of the roll with ultraviolet rays or electron beams. Or a method of irradiating ultraviolet rays from above and below the roll while transporting the roll on a conveyor.
【００１９】表面硬化処理前の弾性層の硬度は、ＪＩＳ
Ａスケールで、３５〜４５°程度、また体積抵抗率の値
は、５×１０5Ω・ｃｍ以下、好ましくは１×１０5Ω・
ｃｍ以下であることが好ましい。The hardness of the elastic layer before the surface hardening treatment is determined according to JIS.
On the A scale, about 35 to 45 °, and the value of the volume resistivity is 5 × 10 5 Ω · cm or less, preferably 1 × 10 5 Ω · cm.
cm or less.
【００２０】なお、本発明の表面処理層は、弾性層の表
面から数μｍ〜数十μｍ程度の厚みで形成される。The surface treatment layer of the present invention is formed with a thickness of several μm to several tens μm from the surface of the elastic layer.
【００２１】上述のようにして得られる表面処理層は高
硬度であることが好ましく、例えば、硬度がＪＩＳＡス
ケールで７０°程度以上であると感光体汚染防止効果が
より一層顕著となる。The surface treatment layer obtained as described above preferably has a high hardness. For example, if the hardness is about 70 ° or more on a JISA scale, the effect of preventing contamination of the photoreceptor becomes more remarkable.
【００２２】このような本発明の弾性ロールの一例を図
１に示す。図１に示すように、弾性ロール１は、芯金２
及び弾性層３を有し、弾性層３の表面には、感放射性ア
クリルモノマーを含浸後、紫外線又は電子線照射により
形成した表面処理層３ａを具備する。FIG. 1 shows an example of such an elastic roll of the present invention. As shown in FIG. 1, the elastic roll 1
And an elastic layer 3. The surface of the elastic layer 3 is provided with a surface treatment layer 3a formed by impregnating a radiation-sensitive acrylic monomer and then irradiating with an ultraviolet ray or an electron beam.
【００２３】このような表面処理層を有する本発明の弾
性ロールは、帯電ロールとしての用途の他、転写ロー
ル、現像ロールなど感光体のなかでも特に有機系感光体
（ＯＰＣ）と密接に関連するロールに用いて有用であ
る。The elastic roll of the present invention having such a surface treatment layer is closely used with an organic photoconductor (OPC) especially among photoconductors such as a transfer roll and a development roll, in addition to being used as a charging roll. Useful for rolls.
【００２４】[0024]
【発明の実施の形態】以下、実施例に基づいて本発明を
説明するが、本発明はこれに限定されるものではない。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments, but the present invention is not limited to these embodiments.
【００２５】（実施例１）金属軸外周にプレス加硫した
エピクロルヒドリンゴムロールをＤＰＨＡ（６官能アク
リルモノマー：東亜合成社製）溶液に浸漬しついで低圧
水銀ランプ（４０ｍＷ：センエンジニアリング社製）を
５分間照射し、ゴムロールを形成した。Example 1 An epichlorohydrin rubber roll press-vulcanized on the outer periphery of a metal shaft was immersed in a DPHA (hexafunctional acrylic monomer: manufactured by Toagosei Co., Ltd.) solution, and then a low-pressure mercury lamp (40 mW: manufactured by Sen Engineering Co., Ltd.) was used for 5 minutes. Irradiation formed a rubber roll.
【００２６】（比較例１）処理液としてＴＰＤＡ（３官
能アクリルモノマー：東亜合成社製）溶液で処理した以
外は実施例１と同様にゴムロールを形成した。Comparative Example 1 A rubber roll was formed in the same manner as in Example 1 except that a TPDA (trifunctional acrylic monomer: manufactured by Toagosei Co., Ltd.) solution was used as a treatment liquid.
【００２７】（比較例２）ＤＰＨＡによるアクリルモノ
マー処理を行わない以外は実施例１と同様にゴムロール
を形成した。Comparative Example 2 A rubber roll was formed in the same manner as in Example 1 except that the acrylic monomer treatment with DPHA was not performed.
【００２８】（試験例１）実施例１、比較例１および２
で形成したエピクロルヒドリンゴムロールをレーザービ
ームプリンターに設置し、感光体に対して＋１３００Ｖ
の直流電圧を印可して印字を行うと同時に感光体表面電
位を表面電位計（モンロー社製：Ｍｏｄｅｌ ２４４）
で測定した。Test Example 1 Example 1, Comparative Examples 1 and 2
The epichlorohydrin rubber roll formed in step 1 was set in a laser beam printer, and +1300 V was applied to the photoreceptor.
The surface potential of the photoreceptor is measured at the same time as printing by applying a DC voltage of
Was measured.
【００２９】得られたロールを感光体に５００ｇの荷重
で接触させ５０℃、９０％の雰囲気下に２２時間放置し
その感光体を用いて上記の条件で印字を行った。この結
果を表１に示す。The obtained roll was brought into contact with the photoreceptor under a load of 500 g, left in an atmosphere of 50 ° C. and 90% for 22 hours, and printing was performed using the photoreceptor under the above conditions. Table 1 shows the results.
【００３０】[0030]
【表１】 [Table 1]
【００３１】表１の結果から明らかなように実施例１の
帯電ロールを用いた場合は、比較例１および２の帯電ロ
ールと比較して感光体へ与えるダメージが非常に小さい
ことがわかる。摩擦係数が比較例と比べて低いことを考
えると、表面硬度が最も高いものとなり感光体に対する
タック性および帯電ロール内部からの低分子物質の感光
体への移行が制御されたことが示唆される。更に、帯電
電位は、比較例のロールと比べて低いものの、電位の変
動幅が２５Ｖと小さく安定した帯電電位が得られるた
め、印字のカブリか少ない良好な画像が得られることが
わかる。As is clear from the results shown in Table 1, when the charging roll of Example 1 was used, the damage to the photosensitive member was very small as compared with the charging rolls of Comparative Examples 1 and 2. Considering that the coefficient of friction is lower than that of the comparative example, the surface hardness is the highest, which indicates that the tackiness to the photoconductor and the transfer of the low-molecular substance from the inside of the charging roll to the photoconductor are controlled. . Furthermore, although the charging potential is lower than that of the roll of the comparative example, the fluctuation range of the potential is as small as 25 V, and a stable charging potential is obtained, so that a good image with little fogging of printing can be obtained.
【００３２】[0032]
【発明の効果】上記のように、本発明によれば煩雑な表
面硬化処理工程を有することなく、高硬度の表面処理層
を有する弾性ロールを提供でき、特に、感光体へのダメ
ージのない良好な印字特性を有する帯電ロールを提供で
きる。As described above, according to the present invention, it is possible to provide an elastic roll having a surface treatment layer of high hardness without a complicated surface hardening treatment step. A charging roll having excellent printing characteristics can be provided.
【図１】本発明の一実施形態に係る帯電ロールの断面図
である。FIG. 1 is a sectional view of a charging roll according to an embodiment of the present invention.
１ 弾性ロール ２ 芯金 ３ 弾性層 ３ａ 表面処理層 DESCRIPTION OF SYMBOLS 1 Elastic roll 2 Core metal 3 Elastic layer 3a Surface treatment layer
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０８Ｊ 7/00 ＣＥＺ Ｃ０８Ｊ 7/00 ＣＥＺＺ ４Ｊ０１１ ３０２ ３０２ ４Ｊ０２６ Ｆ１６Ｃ 13/00 Ｆ１６Ｃ 13/00 Ａ Ｂ Ｚ Ｇ０３Ｇ 15/08 ５０１ Ｇ０３Ｇ 15/08 ５０１Ｄ 15/16 １０３ 15/16 １０３ // Ｃ０８Ｌ 71:03 Ｃ０８Ｌ 71:03 Ｆターム(参考） 2H003 BB11 CC05 2H032 AA05 BA23 2H077 AD06 FA13 FA22 FA25 3J103 AA02 AA14 AA33 AA53 BA31 BA41 EA20 FA02 FA15 FA18 GA02 GA52 GA74 HA03 HA04 HA05 HA12 HA20 HA22 HA31 HA41 HA52 HA53 HA54 4F073 AA07 AA32 BA27 BB02 BB09 CA42 CA45 FA03 4J011 PA90 PB08 PB40 PC02 PC11 QA22 QA23 RA08 UA01 UA03 VA01 WA01 4J026 AB23 AC32 BA28 CA08 DB06 DB09 DB36 FA05 GA06 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C08J 7/00 CEZ C08J 7/00 CEZZ 4J011 302 302 4J026 F16C 13/00 F16C 13/00 A B Z G03G 15 / 08 501 G03G 15/08 501D 15/16 103 15/16 103 // C08L 71:03 C08L 71:03 F term (reference) 2H003 BB11 CC05 2H032 AA05 BA23 2H077 AD06 FA13 FA22 FA25 3J103 AA02 AA14 AA33 AA53 BA31 BA41 EA20 FA02 FA15 FA18 GA02 GA52 GA74 HA03 HA04 HA05 HA12 HA20 HA22 HA31 HA41 HA52 HA53 HA54 4F073 AA07 AA32 BA27 BB02 BB09 CA42 CA45 FA03 4J011 PA90 PB08 PB40 PC02 PC11 QA22 QA23 RA08 UA01 UA03 VA05 DB05 GA01 DB06
Claims (3)
主体とする弾性層を有する弾性ロールであって、前記弾
性層の表面に、感放射線性アクリルモノマーを含浸させ
た後紫外線または電子線を照射することにより形成した
表面処理層を具備することを特徴とする弾性ロール。1. An elastic roll having an elastic layer mainly composed of epichlorohydrin rubber on the surface of a core metal, wherein the surface of the elastic layer is impregnated with a radiation-sensitive acrylic monomer and then irradiated with ultraviolet rays or an electron beam. An elastic roll comprising a surface treatment layer formed as described above.
リルモノマーが、分子内に２個以上のアクリロイル基を
有することを特徴とする弾性ロール。2. The elastic roll according to claim 1, wherein the radiation-sensitive acrylic monomer has two or more acryloyl groups in a molecule.
が、導電性を有していることを特徴とする弾性ロール。3. The elastic roll according to claim 1, wherein the roll has conductivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000269156A JP4462469B2 (en) | 2000-09-05 | 2000-09-05 | Elastic roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000269156A JP4462469B2 (en) | 2000-09-05 | 2000-09-05 | Elastic roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002082514A true JP2002082514A (en) | 2002-03-22 |
| JP4462469B2 JP4462469B2 (en) | 2010-05-12 |
Family
ID=18755813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000269156A Expired - Fee Related JP4462469B2 (en) | 2000-09-05 | 2000-09-05 | Elastic roll |
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| Country | Link |
|---|---|
| JP (1) | JP4462469B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005121906A1 (en) * | 2004-06-09 | 2005-12-22 | Bridgestone Corporation | Development roller and image forming apparatus using the same |
| WO2005121905A1 (en) * | 2004-06-09 | 2005-12-22 | Bridgestone Corporation | Development roller and image forming apparatus using the same |
| WO2006109563A1 (en) * | 2005-04-07 | 2006-10-19 | Bridgestone Corporation | Conductive roller |
| US7668484B2 (en) | 2006-04-28 | 2010-02-23 | Sharp Kabushiki Kaisha | Charging roller and image forming apparatus incorporating same |
| US7869743B2 (en) | 2006-04-28 | 2011-01-11 | Sharp Kabushiki Kaisha | Image forming apparatus, process cartridge used therein, and production method of charging roller |
| US7934316B2 (en) | 2006-04-28 | 2011-05-03 | Sharp Kabushiki Kaisha | Charging roller, process cartridge and image forming apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5968257B2 (en) | 2013-03-29 | 2016-08-10 | 住友理工株式会社 | Modified rubber elastic body and electrophotographic member |
-
2000
- 2000-09-05 JP JP2000269156A patent/JP4462469B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005121906A1 (en) * | 2004-06-09 | 2005-12-22 | Bridgestone Corporation | Development roller and image forming apparatus using the same |
| WO2005121905A1 (en) * | 2004-06-09 | 2005-12-22 | Bridgestone Corporation | Development roller and image forming apparatus using the same |
| US7907878B2 (en) | 2004-06-09 | 2011-03-15 | Bridgestone Corporation | Developing roller and imaging apparatus using the same |
| US7912411B2 (en) | 2004-06-09 | 2011-03-22 | Bridgestone Corporation | Developing roller and imaging apparatus using the same |
| WO2006109563A1 (en) * | 2005-04-07 | 2006-10-19 | Bridgestone Corporation | Conductive roller |
| CN101156112B (en) * | 2005-04-07 | 2010-07-14 | 株式会社普利司通 | Conductive roller |
| US8292791B2 (en) | 2005-04-07 | 2012-10-23 | Bridgestone Corporation | Electrical conductive roller |
| US7668484B2 (en) | 2006-04-28 | 2010-02-23 | Sharp Kabushiki Kaisha | Charging roller and image forming apparatus incorporating same |
| US7869743B2 (en) | 2006-04-28 | 2011-01-11 | Sharp Kabushiki Kaisha | Image forming apparatus, process cartridge used therein, and production method of charging roller |
| US7934316B2 (en) | 2006-04-28 | 2011-05-03 | Sharp Kabushiki Kaisha | Charging roller, process cartridge and image forming apparatus |
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| Publication number | Publication date |
|---|---|
| JP4462469B2 (en) | 2010-05-12 |
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