JPH02213881A - Electrophotographic device - Google Patents
Electrophotographic deviceInfo
- Publication number
- JPH02213881A JPH02213881A JP3664189A JP3664189A JPH02213881A JP H02213881 A JPH02213881 A JP H02213881A JP 3664189 A JP3664189 A JP 3664189A JP 3664189 A JP3664189 A JP 3664189A JP H02213881 A JPH02213881 A JP H02213881A
- Authority
- JP
- Japan
- Prior art keywords
- transfer
- transfer intermediate
- toner
- intermediate body
- protective film
- 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
- 230000001681 protective effect Effects 0.000 claims abstract description 17
- 108091008695 photoreceptors Proteins 0.000 claims description 20
- 235000014113 dietary fatty acids Nutrition 0.000 abstract description 2
- 229930195729 fatty acid Natural products 0.000 abstract description 2
- 239000000194 fatty acid Substances 0.000 abstract description 2
- 150000004665 fatty acids Chemical class 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 abstract description 2
- -1 zinc stearate Chemical class 0.000 abstract description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000003086 colorant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、複写機などの電子写真装置に係り、特に、フ
ルカラー複写機のように転写中間体を有する電子写真装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electrophotographic apparatus such as a copying machine, and particularly to an electrophotographic apparatus having a transfer intermediate such as a full-color copying machine.
例えば、フルカラー複写機などの電子写真装置には、感
光体に現像されたトナー画像を転写紙に転写するための
転写中間体が備えられている。以下に、転写中間体によ
る転写プロセスの一例を説明する。For example, an electrophotographic apparatus such as a full-color copying machine is equipped with a transfer intermediate for transferring a toner image developed on a photoreceptor to transfer paper. An example of a transfer process using a transfer intermediate will be described below.
第４図に示すように、複写機において転写中間体３１は
、感光体３２と１次転写ローラ３３との間に挟まれて走
行し、表面に感光体３２に現像されたｌ・ナー像が転写
される。このトナー像は、転写中間体３１の走行により
下方に移動し、転写中間体３１と２次転写ローラ３４と
の間に挟まれた転写紙３５に転写される。転写中間体３
１は、転写後に残留するトナーが、クリーニング装置３
６のクリーニングブレード３７により回収されて次の複
写に備えるようになっている。As shown in FIG. 4, in a copying machine, a transfer intermediate 31 runs while being sandwiched between a photoreceptor 32 and a primary transfer roller 33, and the l/toner image developed on the photoreceptor 32 is disposed on its surface. transcribed. This toner image moves downward as the transfer intermediate 31 runs, and is transferred onto a transfer paper 35 sandwiched between the transfer intermediate 31 and the secondary transfer roller 34. Transfer intermediate 3
1, the toner remaining after transfer is removed from the cleaning device 3.
6 cleaning blade 37 to prepare for the next copy.
ところが、上記従来の複写機における転写中間体３１は
、感光体３２、転写紙３５およびクリーニングブレード
３７に接触しながら走行するため、長時間の使用により
表面が摩耗して転写効率が低下し、その結果、転写紙へ
のトナー像転写において、文字の中抜けや画像濃度の低
下が生じるという問題点を有していた。また、転写効率
の低下に伴い、クリーニングブレード３７による残留ト
ナーのクリーニング性が低下してフィルミングが発生し
、画像濃度の不均一・などの複写画質の劣化を招来する
という問題点を有していた。However, since the transfer intermediate 31 in the conventional copying machine runs while contacting the photoreceptor 32, the transfer paper 35, and the cleaning blade 37, the surface wears out with long-term use, reducing transfer efficiency. As a result, in transferring the toner image to the transfer paper, there were problems in that hollow characters and a decrease in image density occurred. Furthermore, as the transfer efficiency decreases, the ability of the cleaning blade 37 to clean residual toner decreases, resulting in filming, which leads to deterioration of copy image quality such as uneven image density. Ta.
本発明に係る電子写真装置は、上記課題を解決するため
に、感光体に現像されたトナー像を転写紙に転写する転
写中間体を備えた電子写真装置において、上記転写中間
体の表面に潤滑性を有する保護膜が形成されたことを特
徴としている。In order to solve the above problems, an electrophotographic apparatus according to the present invention is provided with a transfer intermediate for transferring a toner image developed on a photoreceptor to a transfer paper, in which the surface of the transfer intermediate is lubricated. It is characterized by the formation of a protective film that has properties.
上記の構成によれば、転写中間体の表面に潤滑性を有す
る保護膜が形成されているので、転写中間体におけるト
ナーの付着力（分子間力）が小さくなり、転写中間体に
付着したトナーの離型性が良くなる。これにより、転写
効率を向上させることができ、転写中間体から転写紙に
トナー像を転写させる際に、文字の中抜けや画像濃度の
低下を抑制することができる。また、転写効率の向上に
より、クリーニングブレードによる残留ｌ・ナーのクリ
ーニング性を向上させることができ、クリーニング不良
により発生するフィルミングを抑制して、転写時におけ
る画像濃度の不均一を減少させることができる。According to the above configuration, since a protective film having lubricity is formed on the surface of the transfer intermediate, the adhesion force (intermolecular force) of the toner on the transfer intermediate is reduced, and the toner adhering to the transfer intermediate is Improves mold release properties. Thereby, the transfer efficiency can be improved, and when the toner image is transferred from the transfer intermediate to the transfer paper, hollow characters and a decrease in image density can be suppressed. In addition, by improving transfer efficiency, it is possible to improve the ability of the cleaning blade to clean residual l/toner, suppress filming that occurs due to poor cleaning, and reduce uneven image density during transfer. can.
一方、保護膜により転写中間体と感光体、クリニングブ
レードおよび転写紙との間の摩擦係数を小さくして、転
写中間体の摩耗を減少させることができ、転写中間体の
耐久性を向上させることができる。On the other hand, the protective film can reduce the coefficient of friction between the transfer intermediate, the photoreceptor, the cleaning blade, and the transfer paper, thereby reducing wear on the transfer intermediate and improving the durability of the transfer intermediate. Can be done.
上記のように、保護膜により転写中間体の転写効率、ク
リーニング性および耐久性を向上させて、長期にわたり
安定した質の複写画像を得ることができる。As described above, the transfer efficiency, cleanability, and durability of the transfer intermediate can be improved by the protective film, and copied images of stable quality can be obtained over a long period of time.
本発明の複写機による一実施例を第１図ないし第３図に
基づいて説明すれば、以下の通りである。An embodiment of a copying machine according to the present invention will be described below with reference to FIGS. 1 to 3.
第１図に示すように、フルカラーの複写機の上面部には
、透明な原稿載置台１が図の左右方向へ移動自在に配置
されている。また、複写機内の上部には、原稿２の画像
を感光体３に露光する露光光学系４が設けられている。As shown in FIG. 1, a transparent document table 1 is disposed on the top of a full-color copying machine so as to be movable in the left and right directions in the figure. Further, an exposure optical system 4 for exposing the image of the original 2 to the photoreceptor 3 is provided in the upper part of the copying machine.
露光光学系４は、原稿載置台１上に載置される原稿２に
光を照射する光源ランプ４ａと、原稿２からの反射光を
図中−点鎖線のように感光体３に導く複数のミラー４ｂ
・・・４ｂと、光路上に配された結像レンズ４Ｃと、赤
、緑、青の三原色の色フィルタ（図示しない）を有する
色分解フィルタ４ｄとを備えている。The exposure optical system 4 includes a light source lamp 4a that irradiates light onto the original 2 placed on the original platen 1, and a plurality of light source lamps 4a that guide reflected light from the original 2 to the photoreceptor 3 as indicated by the dotted chain line in the figure. mirror 4b
... 4b, an imaging lens 4C disposed on the optical path, and a color separation filter 4d having color filters (not shown) for the three primary colors of red, green, and blue.
露光光学系４の下方には、ベルト状の感光体３が配置さ
れており、この感光体３は、２つの駆動ローラ５ａ・５
ｂにより回転駆動されて、上側が矢印Ａ方向へ走行する
ようになっている。感光体３の上面中央部近傍には、複
数の現像部６ａ〜６Ｃからなる現像装置６が感光体３と
非接触の状態で配されている。また、感光体３における
ローラ５ａ側には、側方に帯電チャージャ７などが設け
られる一方、下面側に感光体３上の残留ｌ・ナーを除去
するクリーニング装置８が設けられている。A belt-shaped photoreceptor 3 is arranged below the exposure optical system 4, and this photoreceptor 3 is connected to two drive rollers 5a and 5.
b, so that the upper side travels in the direction of arrow A. A developing device 6 consisting of a plurality of developing sections 6a to 6C is arranged near the center of the upper surface of the photoreceptor 3 in a non-contact state with the photoreceptor 3. Further, on the roller 5a side of the photoreceptor 3, a charger 7 and the like are provided on the side, and a cleaning device 8 for removing residual l/toner on the photoreceptor 3 is provided on the lower surface side.
感光体３における駆動ローラ５ｂ側には、ベルト状の転
写中間体９が感光体３に圧接するように配置されており
、３つの駆動ローラ１０ａ〜１０Ｃにより回転駆動され
て、感光体３上に形成されたトナー像が転写されるよう
になっている。転写中間体９の背面側には、駆動ローラ
５ｂと対向するように転写チャージャ１１が設けられて
いる。A belt-shaped transfer intermediate 9 is placed on the drive roller 5b side of the photoconductor 3 so as to be in pressure contact with the photoconductor 3, and is rotationally driven by three drive rollers 10a to 10C to transfer onto the photoconductor 3. The formed toner image is transferred. A transfer charger 11 is provided on the back side of the transfer intermediate body 9 so as to face the drive roller 5b.
また、転写中間体９の下面側には、転写チャージャ１２
および分離チャージャ１３が設けられている。さらに、
転写中間体９の上部には、転写中間体９上の残留トナー
を除去するクリーニング装置１４が設けられている。そ
して、転写中間体９の下面部から側方へ搬送部１５が配
されており、搬送部１５の終端部には、定着装置１６が
設けられている。Further, a transfer charger 12 is provided on the lower surface side of the transfer intermediate body 9.
and a separate charger 13 are provided. moreover,
A cleaning device 14 for removing residual toner on the transfer intermediate body 9 is provided above the transfer intermediate body 9 . A conveyance section 15 is disposed laterally from the lower surface of the transfer intermediate body 9, and a fixing device 16 is provided at the terminal end of the conveyance section 15.
上記のように構成された複写機の動作を説明する。The operation of the copying machine configured as above will be explained.
光源ランプ４ａが原稿載置台１上に載置された原稿２に
光を照射してスキャンを数回行う。このスキャンにより
原稿２から反射された光は、ミラー４ｂ・・・４ｂを介
して結像レンズ４ｃに入射し、色分解フィルタ４ｄによ
り色成分別に分解される。この光は、さらにミラー４ｂ
・４ｂを介して分解された色成分の順に感光体３に露光
される。感光体３は、帯電チャージャ７により予め均一
に帯電されているので、上記の露光により各色成分に応
じた静電潜像が形成される。The light source lamp 4a irradiates light onto the original 2 placed on the original placing table 1 to perform scanning several times. The light reflected from the document 2 by this scanning is incident on the imaging lens 4c via the mirrors 4b, . . . , 4b, and is separated into color components by the color separation filter 4d. This light is further transmitted to the mirror 4b
- The photoreceptor 3 is exposed to light in the order of the separated color components via 4b. Since the photoreceptor 3 is uniformly charged in advance by the charger 7, an electrostatic latent image corresponding to each color component is formed by the above exposure.
感光体３上に形成された静電潜像は、現像装置６の各現
像部６ａ〜６ｃにより、色分解フィルタ４ｄの各色フィ
ルタの補色となるイエロー、マゼンタ、シアンの現像剤
で現像され可視化されたトナー像となり、転写チャージ
ャ１２により順次転写中間体９に転写される。このよう
に、転写中間体９上で各色成分別のトナー像を重ねるこ
とにより、完成した一つのカラートナー像が形成される
。The electrostatic latent image formed on the photoreceptor 3 is developed and visualized by each of the developing sections 6a to 6c of the developing device 6 using yellow, magenta, and cyan developers, which are complementary colors of each color filter of the color separation filter 4d. The resulting toner image is sequentially transferred to the transfer intermediate body 9 by the transfer charger 12. In this way, by overlapping toner images for each color component on the transfer intermediate 9, one completed color toner image is formed.
転写中間体９上に転写されたカラートナー像は、転写中
間体９の下面部において転写チャージャ１１により、給
紙カセット１７・１８から供給される転写紙１９上に転
写される。カラートナー像が転写された転写紙１９は、
分離チャージャ１３により転写中間体９から分離された
後、搬送部１５を経て定着装置１６に導入され、ここで
定着処理が施されて複写が終了する。The color toner image transferred onto the transfer intermediate body 9 is transferred onto a transfer paper 19 supplied from paper feed cassettes 17 and 18 by a transfer charger 11 on the lower surface of the transfer intermediate body 9. The transfer paper 19 to which the color toner image has been transferred is
After being separated from the transfer intermediate body 9 by the separation charger 13, it is introduced into the fixing device 16 via the conveying section 15, where it is subjected to a fixing process and copying is completed.
ところで、転写中間体９には、表面にワックス、例えば
ステアリン酸亜鉛のような脂肪酸金属塩が塗布されるな
どして潤滑性を有する保護膜が形成されており、転写中
間体９におけるカラートナーの付着力を減少させている
。以下に、転写中間体９に保護膜を形成する工程を簡単
に説明する。Incidentally, the surface of the transfer intermediate 9 is coated with wax, for example, a fatty acid metal salt such as zinc stearate, thereby forming a protective film having lubricating properties. Reduces adhesion. The process of forming a protective film on the transfer intermediate 9 will be briefly described below.
第２図（ａ）に示すように、ワックス槽内に満たされた
乳液状のワックス２２をスポンジがまたは布製のローラ
２０に含浸させ、転写中間体９を接触させた状態でロー
ラ２ｏを回転させることにより、転写中間体９の表面に
ワックス２２が塗布される。次に、転写中間体９に塗布
されたワックス２２は、自然やドライヤーなどによる乾
燥で転写中間体９に定着する。そして、第２図（ｂ）に
示すように、乾燥したスポンジがまたは布製のローラ２
１を転写中間体９に接触させた状態で回転させることに
より転写中間体９表面の空拭きを行い、同図（ａ）の工
程において塗布されたワックス２２を１０〜２０μｍ程
度の均一の厚さにする。あるいは、第３図に示すように
、転写中間体９全体をワックス槽内のワックス２２に浸
漬して付着させた後、上記と同様にしてワックス２２を
乾燥させ空拭きにより均一の厚さにする。As shown in FIG. 2(a), a sponge or cloth roller 20 is impregnated with emulsion-like wax 22 filled in a wax bath, and the roller 2o is rotated with the transfer intermediate 9 in contact with it. As a result, the wax 22 is applied to the surface of the transfer intermediate 9. Next, the wax 22 applied to the transfer intermediate 9 is fixed to the transfer intermediate 9 by drying naturally or by using a dryer. Then, as shown in FIG. 2(b), the dry sponge or cloth roller 2
The surface of the transfer intermediate body 9 is wiped by rotating the transfer intermediate body 9 while the wax 22 is in contact with the transfer intermediate body 9, and the wax 22 applied in the step of FIG. Make it. Alternatively, as shown in FIG. 3, the entire transfer intermediate 9 is immersed in the wax 22 in a wax tank to make it adhere, and then the wax 22 is dried in the same manner as described above, and the thickness is made uniform by dry wiping. .
上記のように転写中間体９に保護膜が形成されると、感
光体３上の各色のトナー像が転写中間体９に転写される
際に、転写中間体９とトナーとの間の付着力（分子間力
）が小さくなるので、トナーの離型性が良くなり転写効
率が向上する。また、保護膜により転写中間体９とクリ
ーニング装置１４および転写紙１９との間の摩擦係数が
小さ（なるため、転写中間体９は摩耗が減少し耐久性が
向上する。これは、実際に上記のようにして保護膜を形
成し、転写中間体９のライフテストを行ったところ、そ
の寿命が従来の２０００枚から２００００枚以上となる
ことからも明らがである。ただし、上記の寿命は複写画
像を一定の質に持続することができる範囲のものである
。When the protective film is formed on the transfer intermediate 9 as described above, when the toner image of each color on the photoconductor 3 is transferred to the transfer intermediate 9, the adhesive force between the transfer intermediate 9 and the toner increases. (Intermolecular force) is reduced, so the releasability of the toner is improved and the transfer efficiency is improved. In addition, the protective film reduces the coefficient of friction between the transfer intermediate 9, the cleaning device 14, and the transfer paper 19, so that the transfer intermediate 9 suffers less wear and improves durability. This is clear from the fact that when a protective film was formed as described above and a life test was performed on the transfer intermediate 9, its lifespan increased from the conventional 2,000 sheets to more than 20,000 sheets.However, the above-mentioned lifespan This is within a range in which the quality of the copied image can be maintained at a constant level.
なお、転写中間体９に付着させるワックス２２は、乳液
状に限らず固形あるいは半溶融のものでもよく、これら
を用いて転写中間体９に保護膜を形成した場合でも、乳
液状のワックス２２と同様の効果が得られる。ただし、
ワックス２２の形態により保護膜の形成方法が異なるの
はいうまでもない。The wax 22 to be attached to the transfer intermediate 9 is not limited to emulsion, but may be solid or semi-molten, and even if these are used to form a protective film on the transfer intermediate 9, the wax 22 may not be emulsion-like. A similar effect can be obtained. however,
Needless to say, the method for forming the protective film differs depending on the form of the wax 22.
本発明に係る電子写真装置は、以上のように、感光体に
現像されたトナー像を転写紙に転写する転写中間体を備
えた電子写真装置において、上記転写中間体の表面に潤
滑性を有する保護膜が形成された構成である。As described above, the electrophotographic apparatus according to the present invention is an electrophotographic apparatus equipped with a transfer intermediate for transferring a toner image developed on a photoreceptor to a transfer paper, in which the surface of the transfer intermediate has lubricity. This is a configuration in which a protective film is formed.
これにより、転写中間体におけるトナーの付着力（分子
間力）が小さくなり、転写中間体におけるトナー像の離
型性が良くなるので、転写効率を向上させて文字の中抜
けや画像濃度の低下を防止することができる。また、転
写効率の向上により、クリーニングブレードによる残留
トナーのクリーニング性を向上させることができ、クリ
ーニング不良により発生するフィルミングを抑制して、
画像濃度の不均一を減少させることができる。This reduces the adhesion force (intermolecular force) of the toner on the transfer intermediate and improves the releasability of the toner image on the transfer intermediate, improving transfer efficiency and reducing hollow characters and lower image density. can be prevented. In addition, by improving transfer efficiency, it is possible to improve the ability of the cleaning blade to clean residual toner, suppressing filming that occurs due to poor cleaning, and
Image density non-uniformity can be reduced.
一方、保護膜により転写中間体とクリーニングブレード
および転写紙との間の摩擦係数を小さくして、転写中間
体の摩耗を減少させることができ１．転写中間体の耐久
性を向」ニさせることができる。On the other hand, the protective film can reduce the coefficient of friction between the transfer intermediate, the cleaning blade, and the transfer paper, and reduce the wear of the transfer intermediate.1. The durability of the transfer intermediate can be improved.
従って、長期にわたり安定した質の描写画像を得ること
ができるという効果を奏する。Therefore, it is possible to obtain a descriptive image of stable quality over a long period of time.
第１図ないし第３図は本発明の一実施例を示すものであ
って、第１図は複写機の全体構成を示す説明図、第２図
Ｃａ＞は転写中間体にワックスを塗布する工程を示す説
明図、第２図（ｂ）は転写中間体に塗布されたワックス
を空拭きにより均一の厚さにする工程を示す説明図、第
３図は転写中間体をワックス槽内のワックスに浸漬する
工程を示す説明図である。
第４図は従来例の複写機における転写部を示す説明図で
ある。
３は感光体 ９は転写中間体、２２はワックスである。
特許出願人 シャープ 株式会社■
■
第
図（ａ）
第
図（ｂ）
第
図Figures 1 to 3 show an embodiment of the present invention, in which Figure 1 is an explanatory diagram showing the overall structure of a copying machine, and Figure 2 (Ca>) is a step of applying wax to a transfer intermediate. Figure 2 (b) is an explanatory diagram showing the process of dry-wiping the wax applied to the transfer intermediate to make it uniform in thickness, and Figure 3 is an explanatory diagram showing the process of dry-wiping the wax applied to the transfer intermediate to make it uniform in thickness. It is an explanatory view showing a process of immersing. FIG. 4 is an explanatory diagram showing a transfer section in a conventional copying machine. 3 is a photoreceptor, 9 is a transfer intermediate, and 22 is wax. Patent applicant Sharp Corporation ■ ■ Figure (a) Figure (b) Figure
Claims (1)
写中間体を備えた電子写真装置において、上記転写中間
体の表面に潤滑性を有する保護膜が形成されたことを特
徴とする電子写真装置。1. An electrophotographic apparatus equipped with a transfer intermediate for transferring a toner image developed on a photoreceptor to a transfer paper, characterized in that a protective film having lubricity is formed on the surface of the transfer intermediate. Photographic equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3664189A JPH02213881A (en) | 1989-02-14 | 1989-02-14 | Electrophotographic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3664189A JPH02213881A (en) | 1989-02-14 | 1989-02-14 | Electrophotographic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02213881A true JPH02213881A (en) | 1990-08-24 |
Family
ID=12475474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3664189A Pending JPH02213881A (en) | 1989-02-14 | 1989-02-14 | Electrophotographic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02213881A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5873018A (en) * | 1995-05-16 | 1999-02-16 | Ricoh Company, Ltd. | Image forming apparatus having an intermediate transfer unit with a surface having reduced coefficient of friction |
| US6355389B1 (en) | 1999-08-11 | 2002-03-12 | Ricoh Company, Ltd. | Full color image forming method, and toner and intermediate transfer material for the method |
| JP2006330242A (en) * | 2005-05-25 | 2006-12-07 | Ricoh Co Ltd | Endless belt, method for manufacturing the same and image forming apparatus |
| US7215912B2 (en) | 2004-03-19 | 2007-05-08 | Ricoh Company Limited | Intermediate transfer medium and image forming apparatus using the intermediate transfer medium |
| US7392008B2 (en) | 2005-05-27 | 2008-06-24 | Ricoh Company Limited | Electrophotographic image forming method and apparatus |
-
1989
- 1989-02-14 JP JP3664189A patent/JPH02213881A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5873018A (en) * | 1995-05-16 | 1999-02-16 | Ricoh Company, Ltd. | Image forming apparatus having an intermediate transfer unit with a surface having reduced coefficient of friction |
| US6355389B1 (en) | 1999-08-11 | 2002-03-12 | Ricoh Company, Ltd. | Full color image forming method, and toner and intermediate transfer material for the method |
| US6562538B2 (en) | 1999-08-11 | 2003-05-13 | Ricoh Company, Ltd | Full color image forming method, and toner and intermediate transfer material for the method |
| US6638676B2 (en) | 1999-08-11 | 2003-10-28 | Ricoh Company, Ltd. | Full color image forming method, and toner and intermediate transfer material for the method |
| US7215912B2 (en) | 2004-03-19 | 2007-05-08 | Ricoh Company Limited | Intermediate transfer medium and image forming apparatus using the intermediate transfer medium |
| JP2006330242A (en) * | 2005-05-25 | 2006-12-07 | Ricoh Co Ltd | Endless belt, method for manufacturing the same and image forming apparatus |
| US7392008B2 (en) | 2005-05-27 | 2008-06-24 | Ricoh Company Limited | Electrophotographic image forming method and apparatus |
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