JPH03192282A - Transfer device for image forming device - Google Patents
Transfer device for image forming deviceInfo
- Publication number
- JPH03192282A JPH03192282A JP33166189A JP33166189A JPH03192282A JP H03192282 A JPH03192282 A JP H03192282A JP 33166189 A JP33166189 A JP 33166189A JP 33166189 A JP33166189 A JP 33166189A JP H03192282 A JPH03192282 A JP H03192282A
- Authority
- JP
- Japan
- Prior art keywords
- transfer
- intermediate transfer
- charger
- charge
- image
- 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
- 108091008695 photoreceptors Proteins 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 21
- 239000002131 composite material Substances 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 description 1
- 101100326920 Caenorhabditis elegans ctl-1 gene Proteins 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000758 substrate 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）
本発明は主としてカラー画像を形成する複写機やプリン
タ等の電子写真式の画像形成装置に用いられる転写装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a transfer device used in electrophotographic image forming apparatuses such as copying machines and printers that mainly form color images.
（従来の技術）
従来この種の転写装置は、例えば特開昭６２−２０６５
６７号公報や特開昭６２−１５６６８２号公報で知られ
ている。上記特開昭６２−２０６５６７号公報のものは
第４図に示すように感光体ドラムａを例えば−６００Ｖ
に帯電し、赤（Ｒ）、緑（Ｇ）、青（Ｂ）に色分解され
た光で画像を露光して各色毎の静電潜像を形成する。こ
の形成の都度各現像器Ｃ＋ Ｃｔ、Ｃ３、ｃ、を選
択使用して各静電潜像をそれを形成した光に対応する色
のトナー〔シアン（Ｃ）、マゼンタ（Ｍ）、イエロー（
Ｙ）、必要に応じブラック（Ｂｋ））で現像し、これに
より顕像化した各色のトナー像をその現像の都度中間転
写ベルトｂ上に中間転写ベルトｂの非転写面側から働か
せた転写チャージャｋによって繰返し一次転写して合成
画像を形成する。(Prior Art) Conventionally, this type of transfer device is disclosed in, for example, Japanese Patent Application Laid-Open No. 62-2065.
This method is known from Japanese Patent Publication No. 67 and Japanese Patent Application Laid-open No. 156682/1982. In the above-mentioned Japanese Patent Application Laid-open No. 62-206567, as shown in FIG.
The image is exposed to light separated into red (R), green (G), and blue (B) to form an electrostatic latent image for each color. Each time this formation is performed, each developer C+ Ct, C3, c is selected and used to convert each electrostatic latent image into toner of the color corresponding to the light that formed it [cyan (C), magenta (M), yellow (
Y), black (Bk)) as necessary, and a transfer charger that applies the developed toner image of each color onto the intermediate transfer belt b from the non-transfer side of the intermediate transfer belt b each time it is developed. A composite image is formed by performing primary transfer repeatedly according to k.
中間転写ベルトｂは第５図に示すように、体積抵抗がｌ
ＯｈΩ・１以下のポリウレタン等からなる導電体層す、
の上に体積抵抗ＩＱ＋４Ω・１以上のフッ素樹脂等から
なる誘電体層ｂ２を合わせたものであり、帯電チャージ
ャｅにょって約−１０００Ｖに帯電されて感光体ａ上の
トナー像の一次転写をうける。As shown in FIG. 5, the intermediate transfer belt b has a volume resistance of l.
A conductive layer made of polyurethane or the like with OhΩ・1 or less,
A dielectric layer b2 made of a fluororesin or the like having a volume resistivity IQ+4Ω・1 or more is placed on top of the dielectric layer b2, which is charged to about -1000V by a charger e to perform the primary transfer of the toner image on the photoreceptor a. box office.
次に中間転写体す上の合成画像は転写チャージャｆによ
って転写材ｇ上に一括して二次転写され、転写材ｆとと
もに中間転写体すから分離される。この分離には分離チ
ャージャｈ等が用いられる。Next, the composite image on the intermediate transfer body is secondarily transferred all at once onto a transfer material g by a transfer charger f, and is separated from the intermediate transfer body together with the transfer material f. A separation charger h or the like is used for this separation.
分離後の転写材ｇは搬送ベルトｉによって搬送され、定
着器ｊによって定着処理される。The separated transfer material g is transported by a transport belt i, and is subjected to a fixing process by a fixing device j.
また上記特開昭６２−１５６６８２号公報のものは中間
ベルトｂとして、体積抵抗が１０’〜１０”Ω・１のポ
リウレタン等の半導体を用い、約−６０００Ｖの電圧を
印荷された転写チャージャｋによって感光体ａ上のトナ
ー像の一次転写をうける。Furthermore, the device disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 62-156682 uses a semiconductor such as polyurethane having a volume resistance of 10' to 10'' Ω·1 as the intermediate belt b, and uses a transfer charger k to which a voltage of about -6000V is applied. The toner image on the photoreceptor a undergoes primary transfer.
（発明が解決しようとする課題）
しかし上記誘電体層を有する従来例のような転写装置で
は、前記−次転写は確実かつ充分に行われるが、二次転
写は不充分であって形成した画像・が使用に耐えないこ
とがある。これは中間転写体す上に形成する画像の合成
数、つまり一次転写の繰返し回数が多いほど問題となり
、−次転写を終えて感光体ａから中間転写体すが離れる
ときの剥離放電によって中間転写体す上のトナー像の電
荷が増加することによるのが原因と思われる。(Problems to be Solved by the Invention) However, in the conventional transfer device having the dielectric layer described above, the secondary transfer is performed reliably and sufficiently, but the secondary transfer is insufficient and the formed image is・It may not be possible to withstand use. This becomes a problem as the number of composite images formed on the intermediate transfer member increases, that is, the number of times the primary transfer is repeated. This is thought to be caused by an increase in the charge of the toner image on the surface.
ちなみに従来の転写装置で４色合成の画像を形成する場
合の二次転写に供されるトナー像の単位面積当りの総電
荷量は、５０ｎＣ／ｃｔｉｌにまで増加していた。Incidentally, when a four-color composite image is formed using a conventional transfer device, the total charge amount per unit area of a toner image subjected to secondary transfer has increased to 50 nC/ctil.
一方、半導体ベルトを用いた従来例においても、−次転
写は確実かつ充分に行われるが、二次転写は不充分であ
って形成した画像が使用に耐えないことがある。これは
−次転写部で転写チャージャｋからの電荷が転写ベルト
ｂをそれが半導体であることにより突き抜け、中間転写
ベル）ｂ上に一次転写されるトナー像を逆帯電させてし
まうためと思われる。On the other hand, in the conventional example using a semiconductor belt, the second transfer is performed reliably and sufficiently, but the second transfer is insufficient and the formed image may not be usable. This seems to be because - in the next transfer section, the charge from the transfer charger k penetrates the transfer belt b because it is a semiconductor, and the toner image that is primarily transferred onto the intermediate transfer belt b is reversely charged. .
（課題を解決するための手段）
本発明は上記課題を達成するために、感光体上にトナー
現像により形成されるトナー像を中間転写体にその非転
写面側から働く転写チャージャによって一次転写した後
、転写材上に二次転写して画像を形成する画像形成装置
において、中間転写体を体積抵抗１０９〜１０１！Ω・
１の基体の表面に体積抵抗１０Ｉ４Ω・１以上の高抵抗
層を設けたことを特徴とするものである。(Means for Solving the Problems) In order to achieve the above-mentioned problems, the present invention provides a system in which a toner image formed on a photoreceptor by toner development is primarily transferred to an intermediate transfer member by a transfer charger that operates from the non-transfer surface side of the intermediate transfer member. After that, in an image forming apparatus that forms an image by secondarily transferring it onto a transfer material, the intermediate transfer member has a volume resistance of 109 to 101! Ω・
A high resistance layer having a volume resistivity of 10I4Ω·1 or more is provided on the surface of the substrate 1.
（作 用）
一次転写部では転写チャージャの働きによって、感光体
上のトナー像が中間転写体上に一次転写される。この−
次転写されるトナー像は中間転写体と共に感光体から分
離されて次の二次転写部に送られ二次転写に供される。(Function) In the primary transfer section, the toner image on the photoreceptor is primarily transferred onto the intermediate transfer body by the action of the transfer charger. This-
The toner image to be next transferred is separated from the photoreceptor together with the intermediate transfer member and sent to the next secondary transfer section for secondary transfer.
前記−次転写において転写チャージャからの電荷は感光
体側のトナー像を中間転写体側に一次転写させるに充分
な帯電作用を中間転写体に及ぼすように設定されても、
中間転写体の高抵抗層が前記電荷をシールドして中間転
写体をその転写面側へ抜けるのを阻止するので、中間転
写体上に一次転写されるトナー像が転写チャージャから
の電荷によって逆帯電されるようなことを防止すること
ができる。Even if the charge from the transfer charger in the above-mentioned next transfer is set to exert a sufficient charging effect on the intermediate transfer body to cause the toner image on the photoreceptor side to be primarily transferred to the intermediate transfer body side,
The high-resistance layer of the intermediate transfer body shields the charges and prevents them from passing through the intermediate transfer body toward its transfer surface, so that the toner image that is primarily transferred onto the intermediate transfer body is reversely charged by the charge from the transfer charger. It is possible to prevent such things from happening.
（実施例）
第１図は本発明の第１の実施例を示すカラー複写機の概
略構成図であり、先ず一般的な構成につき説明する。感
光体ドラム１のまわりに帯電チャージャ２、画像露光部
３、現像装置４、クリーニング装置６、イレーザ７が感
光体ドラム１の回転方向に順次配設されている。感光体
ドラムｌのまわりの現像装置４およびクリーニング装置
６との各対向部の間の部分には中間転写ベルト８がその
一部で対向するように設けられている。(Embodiment) FIG. 1 is a schematic configuration diagram of a color copying machine showing a first embodiment of the present invention, and first, the general configuration will be explained. A charger 2 , an image exposure section 3 , a developing device 4 , a cleaning device 6 , and an eraser 7 are sequentially arranged around the photosensitive drum 1 in the rotational direction of the photosensitive drum 1 . An intermediate transfer belt 8 is provided in a portion around the photosensitive drum 1 between opposing portions of the developing device 4 and the cleaning device 6 so as to partially face each other.
中間転写ベルト８は駆動ローラを含む５つのローラ１１
〜１５によって支持案内され、ローラ１１．１２によっ
て支持されている部分の間で感光体ドラム１と対向し、
その内側に一次転写のための第１の転写チャージ中２１
及び除電チャージ中４１が、また中間転写ベルト８のロ
ーラ１４．１５によって支持されている部分の外側に対
向して二次転写のための第２の転写チャージャ２２が設
けられ、その直ぐ後ろに分離チャージャ２３が設けられ
ている。The intermediate transfer belt 8 has five rollers 11 including a drive roller.
facing the photoreceptor drum 1 between the portions supported and guided by ~15 and supported by rollers 11.12;
21 during the first transfer charge for primary transfer inside it
A second transfer charger 22 for secondary transfer is provided opposite to the outside of the portion of the intermediate transfer belt 8 supported by the roller 14.15, and a second transfer charger 22 for secondary transfer is provided immediately behind it. A charger 23 is provided.
更にローラ１５．１１によって支持されている部分の間
にクリーニング装置９が中間転写ベルト８と離間可能に
設けられている。Furthermore, a cleaning device 9 is provided between the portions supported by the rollers 15, 11 so as to be separable from the intermediate transfer belt 8.
二次転写部の出口側には搬送ベルト２６、定着装置２７
が順次設けられている。On the exit side of the secondary transfer section, there is a conveyor belt 26 and a fixing device 27.
are set up in sequence.
現像器Ｗ、４はカラー画像形成のため前記Ｙ、Ｍ、Ｃ，
Ｂｋの各色トナーを収容した現像器４）’、４ｍ、４ｃ
、４ｂｋを有している。The developing device W, 4 is used to form a color image, so the developing device W, 4 is used to form a color image.
Developing units 4)', 4m, 4c containing toner of each color of Bk
, 4bk.
感光体ドラム１は帯電チャージャ２によって一様に帯電
された表面に各色の光で画像を露光され静電潜像を形成
する。この各静電潜像はそれが形成される都度、現像器
４ｙ、４ｍ、４Ｃ１４ｂｋの選択使用により露光した光
の色に対応するＹＳＭ、Ｃ５Ｂｋの各色のトナーで現像
され顕像化される。The surface of the photosensitive drum 1 is uniformly charged by a charging charger 2, and an image is exposed to light of each color to form an electrostatic latent image. Each time each electrostatic latent image is formed, it is developed and visualized with toner of each color of YSM and C5Bk corresponding to the color of the exposed light by selective use of the developing units 4y, 4m, and 4C14bk.
感光体ドラム１上に形成され”るトナー像はそれが形成
される都度、中間転写ベルト８上へ第１の転写チャージ
ャ２１によって逐次−次転写されトナー画像が重なった
合成画像とされる。Each time the toner image is formed on the photosensitive drum 1, it is sequentially transferred onto the intermediate transfer belt 8 by the first transfer charger 21 to form a composite image in which the toner images are superimposed.
各回の一次転写後の感光体ドラムｌの表面はクリーニン
グ装置６によってクリーニングされ、かつイレーザ７に
よって残留電荷を除去された後、再度の帯電を経て次の
一次転写に供される。After each primary transfer, the surface of the photoreceptor drum l is cleaned by a cleaning device 6, residual charges are removed by an eraser 7, and then charged again and used for the next primary transfer.
中間転写ベルト８上に所定の画像が形成されたとき、こ
の画像と先端が一致するようにして二次転写部に転写シ
ート３１が供給される。二次転写部では中間転写ベルト
８上の合成画像が第２の転写チャージャ２２によって転
写シート３１上に二次転写された後、クリーニング装置
９によってクリーニングされる。When a predetermined image is formed on the intermediate transfer belt 8, the transfer sheet 31 is supplied to the secondary transfer section so that the leading edge of the image coincides with the image. In the secondary transfer section, the composite image on the intermediate transfer belt 8 is secondarily transferred onto the transfer sheet 31 by the second transfer charger 22, and then cleaned by the cleaning device 9.
二次転写を受けた転写シート３１は搬送ベルト２６によ
って搬送され、定着装置２７に送り付けられ、ここで定
着処理される。The transfer sheet 31 that has undergone the secondary transfer is conveyed by the conveyor belt 26 and sent to the fixing device 27, where it is subjected to a fixing process.
なお中間転写ベルト８は第２図に示すように基体層８ａ
の上に表面層８ｂを重ねたものであり、基体層８ａの電
気抵抗と一次転写との関係は第３図に示す通りである。Note that the intermediate transfer belt 8 has a base layer 8a as shown in FIG.
A surface layer 8b is superimposed on the base layer 8a, and the relationship between the electrical resistance of the base layer 8a and the primary transfer is as shown in FIG.
基体層８ａの電気抵抗がｌＯＱΩ・１より小さいと、転
写チャージャ２１から中間転写ベルト８へ流れ込んだ電
荷がベルト８の抵抗が低いため横方向に逃げてしまい、
−次転写しにくくなる。また基体層８ａの電気抵抗が１
０１！Ω・１よりも大きいと、転写チャージャ２１から
中間転写ベルト８へ流れ込んだ電荷がベルト８の上部に
止まってしまって表面電位が急激に高くなり、転写チャ
ージャ２１からベルト８へ電荷が流れに（く−次転写し
にくくなる。If the electrical resistance of the base layer 8a is smaller than lOQΩ·1, the charges flowing from the transfer charger 21 to the intermediate transfer belt 8 will escape laterally because the resistance of the belt 8 is low.
-It becomes difficult to perform the next transfer. Further, the electrical resistance of the base layer 8a is 1
01! If it is larger than Ω・1, the charge flowing from the transfer charger 21 to the intermediate transfer belt 8 will stop at the upper part of the belt 8, and the surface potential will suddenly increase, causing the charge to flow from the transfer charger 21 to the belt 8 ( It becomes difficult to transfer the image.
そこで本実施例では、基体層８ａを、体積抵抗が１０９
〜１０′２Ω・ＣＴｌ１で、厚さ３５０ ａｍのポリエ
ステルからなる半導体層８ａとして一次転写性を確保し
、表面層８ｂを体積抵抗が１０ ＋４Ω・Ｃ１以上で、
厚さ５０μｍのポリエチレンからなる薄い誘電体層８ｂ
として、転写チャージャ２１によるベルト８上のトナー
像への影響を防止して二次転写性を確保するようにしで
ある。Therefore, in this embodiment, the base layer 8a has a volume resistivity of 109
The semiconductor layer 8a made of polyester with a thickness of 350 am with a resistance of ~10'2Ω・CTl1 ensures primary transferability, and the surface layer 8b has a volume resistivity of 10+4Ω・C1 or more,
Thin dielectric layer 8b made of polyethylene with a thickness of 50 μm
Therefore, the influence of the transfer charger 21 on the toner image on the belt 8 is prevented to ensure secondary transfer performance.
このように構成された中間転写ベルト８を用いた場合、
中間転写ベルト８は、−６０００Ｖの電圧を印加された
転写チャージャ２１によって、感光体ドラムｌ上のトナ
ー像が充分に一次転写されたし、中間転写ベルト８上に
一次転写され、交流電流を印加した除電チャージャ４１
の除電作用を受けて剥離放電により過度に帯電されるこ
ともなく、二次転写も充分に達成された。When using the intermediate transfer belt 8 configured in this way,
The toner image on the photoreceptor drum l is sufficiently primarily transferred onto the intermediate transfer belt 8 by the transfer charger 21 to which a voltage of -6000V is applied, and the toner image is primarily transferred onto the intermediate transfer belt 8, and an alternating current is applied thereto. Static neutralization charger 41
Due to the neutralizing action of , there was no excessive charging due to peeling discharge, and secondary transfer was sufficiently achieved.
なお本発明者が実験したところによると、中間転写ベル
ト８における誘電体層８ｂの厚さを変化させ、静電容量
を変化させた時の一次および二次の各転写性との関係は
下記の表に示す通りであった。According to experiments conducted by the present inventor, the relationship between the primary and secondary transfer properties when the thickness of the dielectric layer 8b in the intermediate transfer belt 8 is changed and the capacitance is changed is as follows. It was as shown in the table.
この表において×は転写不良、Δは転写やや不良、○は
転写良を示し、誘電体層８ｂの静電容量は二次転写に影
響なく、−次転写には少なくとも２０ＰＦ／ｃｄ以上あ
ればよいことが分かる。そしてこの結果から誘電体層８
ｂは第１の転写チャージャ２１からの帯電電荷が中間転
写ベルト８をその転写面側へ突き抜けるのを阻止し、中
間転写ベルト８上に一次転写されたトナー像が第１の転
写チャージャ２１からの帯電電荷によって逆帯電を受け
ないようにしているものと推測される。In this table, × indicates poor transfer, Δ indicates slightly poor transfer, and ○ indicates good transfer, and the capacitance of the dielectric layer 8b has no effect on the secondary transfer. I understand that. From this result, the dielectric layer 8
b prevents the electrical charge from the first transfer charger 21 from penetrating the intermediate transfer belt 8 toward its transfer surface side, and prevents the toner image primarily transferred onto the intermediate transfer belt 8 from passing through the first transfer charger 21. It is presumed that this is to prevent reverse charging due to the charged charges.
（発明の効果）
本発明によれば、−次転写部で転写チャージャの働きに
より感光体上のトナー像が中間転写体上に一次転写され
るとき、転写チャージャからの電荷は感光体側のトナー
像を中間転写体側に一次転写させるに充分な帯電作用を
中間転写体に及ぼすように設定されても、中間転写体の
高抵抗層が前記電荷をシールドして中間転写体をその転
写面側へ抜けるのを阻′止して、中間転写体上に一次転
写されるトナー像が転写チャージャからの電荷によって
逆帯電されるようなことを防止することができるので、
中間転写体上に一次転写されたトナー像は、初期の電荷
をよく保ち、二次転写を充分に達成することができる。(Effects of the Invention) According to the present invention, when the toner image on the photoreceptor is primarily transferred onto the intermediate transfer member by the action of the transfer charger in the next transfer section, the charge from the transfer charger is transferred to the toner image on the photoreceptor side. Even if the setting is made to exert a sufficient charging effect on the intermediate transfer body to cause the primary transfer of the charge to the intermediate transfer body side, the high resistance layer of the intermediate transfer body shields the charge and the charge passes through the intermediate transfer body to the transfer surface side. This can prevent the toner image primarily transferred onto the intermediate transfer member from being reversely charged by the charge from the transfer charger.
The toner image primarily transferred onto the intermediate transfer member retains its initial charge well, and can sufficiently achieve secondary transfer.
また、基体として、体積抵抗１０９〜１０”Ω・ｃｍの
半導体を使用しているため、前記第１次転写位置の中間
転写体移動方向下流側近傍の裏面に除電手段を設け、感
光体から中間転写体が分離されるときの剥離放電による
電荷を消去することが可能となる。従って一次転写され
たトナー像が剥離放電の影響で電荷が増大するようなこ
とを抑止し、二次転写に供されるトナーの帯電量を所定
値以下にすることができ、かつ剥離放電の影響による感
光体の疲労も防止できる。Furthermore, since a semiconductor having a volume resistance of 109 to 10" Ωcm is used as the base, a static eliminating means is provided on the back surface near the downstream side of the primary transfer position in the direction of movement of the intermediate transfer body, and It is possible to erase the electric charge caused by peeling discharge when the transfer body is separated.Therefore, it is possible to prevent the primary transferred toner image from increasing in electric charge due to the influence of peeling discharge, and to prepare it for secondary transfer. The amount of charge on the toner can be kept below a predetermined value, and fatigue of the photoreceptor due to the effects of peeling discharge can also be prevented.
第１図は本発明の第１の実施例を示す画像形成装置の概
略構成図、第２図は中間転写ベルトの一部拡大断面図、
第３図は中間転写ベルトの基体層の電気抵抗と一次転写
効率との関係を示すグラフ、第４図は従来の画像形成装
置を示す概略構成図、第５図は中間転写ベルトの一部拡
大断面図である。
第３図
・・・・・−・感光体ドラム
・・・・帯電チャージャ
・−・露光部
現像装置
・・中間転写ベルト
・半導体層
・−・−誘電体層
第１の転写チャージャ
第２の転写チャージャ
１−・・・−・・・・・−
２−−一−・＝・−・−・・・・
３ ・−・−・・−・−・−・・・−・・４〜 ＝−−
−・・・・・・−＝−・・・・・・８− ・−・・・−
−−−一−−・−・・８ａ−ｍ−−−−”−−−−−・
８ｂ−・−・
１
２FIG. 1 is a schematic configuration diagram of an image forming apparatus showing a first embodiment of the present invention, FIG. 2 is a partially enlarged sectional view of an intermediate transfer belt,
Figure 3 is a graph showing the relationship between the electrical resistance of the base layer of the intermediate transfer belt and the primary transfer efficiency, Figure 4 is a schematic configuration diagram showing a conventional image forming apparatus, and Figure 5 is a partial enlargement of the intermediate transfer belt. FIG. Figure 3: Photosensitive drum, charger, exposure area developing device, intermediate transfer belt, semiconductor layer, dielectric layer, first transfer charger, second transfer Charger 1−・・−・・・− 2−−1−・=・−・−・・・・・ 3 ・−・−・・−・−・−・・・−・・4~ =− −
−・・・・・・−=−・・・・・・8− ・−・・・−
---1--・--・8a-m----"------・8b-・-・1 2
Claims (1)
を中間転写体にその非転写面側から働く転写チャージャ
によって一次転写した後、転写材上に二次転写して画像
を形成する画像形成装置において、 中間転写体を体積抵抗１０＾９〜１０＾１＾２Ω・ｃｍ
の基体の表面に体積抵抗１０＾１＾４Ω・ｃｍ以上の高
抵抗層を設けたことを特徴とする画像形成装置の転写装
置。(1) Image formation in which a toner image formed on a photoreceptor by toner development is primarily transferred to an intermediate transfer member by a transfer charger that operates from the non-transfer surface side, and then secondarily transferred onto a transfer material to form an image. In the device, the intermediate transfer body has a volume resistance of 10^9 to 10^1^2 Ω・cm.
A transfer device for an image forming apparatus, characterized in that a high resistance layer having a volume resistivity of 10^1^4 Ω·cm or more is provided on the surface of a base body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33166189A JPH03192282A (en) | 1989-12-21 | 1989-12-21 | Transfer device for image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33166189A JPH03192282A (en) | 1989-12-21 | 1989-12-21 | Transfer device for image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03192282A true JPH03192282A (en) | 1991-08-22 |
Family
ID=18246167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33166189A Pending JPH03192282A (en) | 1989-12-21 | 1989-12-21 | Transfer device for image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03192282A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2715483A1 (en) * | 1994-01-24 | 1995-07-28 | Ricoh Kk | Intermediate image transfer element for electrographic imaging appts |
| EP0733957A2 (en) * | 1992-01-22 | 1996-09-25 | Ricoh Company, Ltd | Image transferring device with charging control |
| US5655199A (en) * | 1995-03-22 | 1997-08-05 | Ricoh Company, Ltd. | Intermediate transfer type image forming apparatus and an intermediate transfer medium therefor |
| US5978638A (en) * | 1996-10-31 | 1999-11-02 | Canon Kabushiki Kaisha | Intermediate transfer belt and image forming apparatus adopting the belt |
| US7713458B2 (en) | 2003-10-31 | 2010-05-11 | Sumitomo Rubber Industries, Ltd. | Method of manufacturing laminated seamless belt and laminated seamless belt |
| US7714882B2 (en) | 2006-09-15 | 2010-05-11 | Ricoh Company, Ltd. | Image forming apparatus and image forming process |
-
1989
- 1989-12-21 JP JP33166189A patent/JPH03192282A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0733957A2 (en) * | 1992-01-22 | 1996-09-25 | Ricoh Company, Ltd | Image transferring device with charging control |
| EP0733957A3 (en) * | 1992-01-22 | 1998-01-07 | Ricoh Company, Ltd | Image transferring device with charging control |
| US5897241A (en) * | 1992-01-22 | 1999-04-27 | Ricoh Company, Ltd. | Image transferring device for image forming equipment |
| FR2715483A1 (en) * | 1994-01-24 | 1995-07-28 | Ricoh Kk | Intermediate image transfer element for electrographic imaging appts |
| DE19502098A1 (en) * | 1994-01-24 | 1995-11-16 | Ricoh Kk | Intermediate image transmission element and image forming device with this element |
| US5572304A (en) * | 1994-01-24 | 1996-11-05 | Ricoh Company, Ltd. | Intermediate image transfer element and image forming apparatus using the same |
| DE19502098C2 (en) * | 1994-01-24 | 2001-02-22 | Ricoh Kk | Intermediate image transmission element and image forming device with this element |
| US5655199A (en) * | 1995-03-22 | 1997-08-05 | Ricoh Company, Ltd. | Intermediate transfer type image forming apparatus and an intermediate transfer medium therefor |
| US5978638A (en) * | 1996-10-31 | 1999-11-02 | Canon Kabushiki Kaisha | Intermediate transfer belt and image forming apparatus adopting the belt |
| US7713458B2 (en) | 2003-10-31 | 2010-05-11 | Sumitomo Rubber Industries, Ltd. | Method of manufacturing laminated seamless belt and laminated seamless belt |
| US7714882B2 (en) | 2006-09-15 | 2010-05-11 | Ricoh Company, Ltd. | Image forming apparatus and image forming process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5742888A (en) | Transfer apparatus for an image forming apparatus | |
| JPH0926713A (en) | Electrostatic image forming device | |
| EP0400986B1 (en) | An image forming apparatus | |
| JP3888862B2 (en) | Image forming apparatus | |
| US4737816A (en) | Image transfer device | |
| JPH03192282A (en) | Transfer device for image forming device | |
| JP3346063B2 (en) | Image transfer device | |
| JP2711903B2 (en) | Image forming device | |
| JP2920022B2 (en) | Image forming device | |
| JP4261822B2 (en) | Image forming apparatus | |
| JPH03196172A (en) | Transfer device for image forming device | |
| JP3256938B2 (en) | Image forming device | |
| JPS6186775A (en) | Transferring and separating device | |
| JPH04324885A (en) | Image forming device | |
| JPH0580634A (en) | Intermediate transfer system image forming device and method | |
| JP3668163B2 (en) | Color image forming apparatus | |
| JP3796041B2 (en) | Image forming apparatus | |
| JPS6152674A (en) | Picture transfer device | |
| JP2627561B2 (en) | Image forming device | |
| JPH04296774A (en) | Image forming device | |
| JPS6151178A (en) | Image transfer device | |
| JP2003195653A (en) | Image forming apparatus | |
| JP2004226919A (en) | Method for transfer using transfer belt | |
| JP2003302841A (en) | Image forming apparatus | |
| JPH0675483A (en) | Color image forming device |