JPH0863000A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPH0863000A JPH0863000A JP6202165A JP20216594A JPH0863000A JP H0863000 A JPH0863000 A JP H0863000A JP 6202165 A JP6202165 A JP 6202165A JP 20216594 A JP20216594 A JP 20216594A JP H0863000 A JPH0863000 A JP H0863000A
- Authority
- JP
- Japan
- Prior art keywords
- intermediate transfer
- belt
- transfer belt
- reinforcing member
- image forming
- 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
- 238000012546 transfer Methods 0.000 claims abstract description 153
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 66
- 238000005452 bending Methods 0.000 claims abstract description 30
- 239000002861 polymer material Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 19
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 108091008695 photoreceptors Proteins 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 21
- 230000001070 adhesive effect Effects 0.000 description 21
- 238000012360 testing method Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 9
- 239000004417 polycarbonate Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 description 6
- 239000005020 polyethylene terephthalate Substances 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 description 5
- 230000002265 prevention Effects 0.000 description 4
- 239000006229 carbon black Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 229920002620 polyvinyl fluoride Polymers 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Color Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ベルト式の中間転写体
を用いたカラー電子写真複写機等の画像形成装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a color electrophotographic copying machine using a belt type intermediate transfer member.
【０００２】[0002]
【従来の技術】従来、カラー電子写真複写機等の画像形
成装置における転写方法として、感光体ドラム等の像担
持体上に形成されたトナー像を一旦転写用紙以外の中間
転写体上に１次転写した後、中間転写体上のトナー像を
あらためて転写用紙上へ２次転写して複写像を得る方法
が知られている。この方法を用いることで、用紙の保持
状態、用紙の厚さやこし、用紙の表面性等多くの要因に
よる多重転写不良やカラーレジストレーションのズレの
発生等を抑えることができるという効果のあることが知
られている。2. Description of the Related Art Conventionally, as a transfer method in an image forming apparatus such as a color electrophotographic copying machine, a toner image formed on an image bearing member such as a photosensitive drum is temporarily primary-transferred onto an intermediate transfer member other than transfer paper. A method is known in which after the transfer, the toner image on the intermediate transfer member is re-transferred onto a transfer paper to obtain a copy image. By using this method, it is possible to suppress the occurrence of multiple transfer failure and color registration misalignment due to many factors such as the paper holding state, paper thickness and strain, and paper surface properties. Are known.
【０００３】この中間転写体としては、例えば、複数の
ロールにより張架されて一定の速度で回転する中間転写
体ベルトが用いられるが、一般に、ベルトを回転駆動す
る場合、ベルトの左右の周長差、ベルトを張架している
ロールの外径の誤差、各ロールの回転軸の傾き等によ
り、ベルトが蛇行することが知られており、この蛇行を
防止するために、中間転写体ベルトの幅方向の端部に誘
導リブを設けたり、その端部にベルト位置規制部材を設
けて中間転写体ベルトが押し当たって止まるようにする
方法などが、従来から用いられている。As the intermediate transfer member, for example, an intermediate transfer member belt which is stretched by a plurality of rolls and rotates at a constant speed is used. Generally, when the belt is driven to rotate, the left and right circumferential lengths of the belt are used. It is known that the belt meanders due to the difference, the error of the outer diameter of the rolls around which the belt is stretched, the inclination of the rotation axis of each roll, etc. Conventionally, there has been used a method in which a guide rib is provided at an end portion in the width direction, or a belt position regulating member is provided at the end portion so that the intermediate transfer belt is pressed and stopped.
【０００４】これらの方法を用いる場合、中間転写体ベ
ルトの端部がベルト位置規制部材等に強い力で押し付け
られるため、中間転写体ベルト端部にヒビ割れ等の損傷
を生じる場合があり、これを防ぐことを目的として、実
開平１−１６４４６１号公報には、中間転写体ベルトの
幅方向における両端部に沿って両端部を補強する補強部
材を設ける例が開示されており、また特開平２−１０３
８９号公報には、中間転写体ベルトの両端部の引張り強
度が中央部のそれよりも強いベルトを用いることが開示
されている。When these methods are used, since the end of the intermediate transfer belt is pressed against the belt position regulating member with a strong force, the end of the intermediate transfer belt may be damaged, such as cracked. In order to prevent the above, Japanese Utility Model Laid-Open No. 1-164461 discloses an example in which a reinforcing member is provided along the widthwise ends of the intermediate transfer belt to reinforce the both ends, and Japanese Patent Laid-Open Publication No. Hei 2 -103
Japanese Unexamined Patent Publication No. 89 discloses the use of a belt whose tensile strength at both ends of the intermediate transfer belt is stronger than that at the central portion.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上述の
補強されたベルトであっても、長期間使用すると補強部
材自身がひび割れしてその機能を失ってしまい、中間転
写体ベルトに生じたヒビ割れが徐々に大きくなり、つい
には画像領域にまで達してしまう場合があるという問題
がある。However, even with the above-mentioned reinforced belt, the reinforcing member itself cracks and loses its function after long-term use, and the intermediate transfer belt is not cracked. There is a problem in that it may gradually increase and eventually reach the image area.
【０００６】また、補強部材として、加塑材がしみ出す
ゴムや、トナーがこびり付く塩化ビニールなどを用いる
と、加塑材が感光体を汚染したり、こびり付いたトナー
が感光体を傷つけたり、転写材を汚したりするという問
題が生じる。さらに、この補強部材を形成する方法とし
て、コーティングを用いる方法や接着剤を用いる方法な
どもあるが、前者の場合、ベルトと補強部材の間の十分
な接着強度が得られず、長期間使用していると補強部材
が剥がれてしまうという問題があり、後者の場合、接着
剤の量が多すぎると端部からはみ出してベルト表面を汚
染し、逆に接着剤が少なすぎると十分な接着強度が得ら
れず、接着剤の量の調整が難しいという問題がある。Further, when rubber exuding from the plasticizing material or vinyl chloride to which the toner sticks is used as the reinforcing member, the plasticizing material may contaminate the photoconductor or the stuck toner may damage the photoconductor. However, there arises a problem that the transfer material is soiled. Further, as a method of forming this reinforcing member, there are a method of using a coating and a method of using an adhesive, but in the former case, sufficient adhesive strength between the belt and the reinforcing member cannot be obtained, so that the reinforcing member is used for a long time. There is a problem that the reinforcing member will peel off, and in the case of the latter, if the amount of adhesive is too large, it will stick out from the edges and contaminate the belt surface, and on the contrary, if the amount of adhesive is too small, sufficient adhesive strength will result. There is a problem that it is difficult to control the amount of the adhesive because it cannot be obtained.
【０００７】本発明は、上記事情に鑑み、耐久性が大幅
に向上した中間転写体ベルトを備えた画像形成装置を提
供することを目的とする。In view of the above circumstances, it is an object of the present invention to provide an image forming apparatus provided with an intermediate transfer belt whose durability is greatly improved.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成する本発
明の画像形成装置は、像担持体に形成された潜像をトナ
ーで現像して得たトナー像が転写されるとともに、転写
されたトナー像を転写材に転写する中間転写体ベルトを
供えた画像形成装置において、上記中間転写体ベルト
の、幅方向の少なくとも一方の端部に沿ってその中間転
写体ベルトに固着された、曲げ弾性率が１×１０4 ｋｇ
ｆ／ｃｍ2 以下であって、かつ、中間転写体ベルトの曲
げ弾性率の１％以上５０％以下の範囲の曲げ弾性率を有
する高分子材料からなる補強部材を備えたことを特徴と
する。In the image forming apparatus of the present invention which achieves the above object, the toner image obtained by developing the latent image formed on the image bearing member with toner is transferred and transferred. In an image forming apparatus provided with an intermediate transfer body belt for transferring a toner image to a transfer material, a bending elasticity fixed to the intermediate transfer body belt along at least one end portion in the width direction of the intermediate transfer body belt. The rate is 1 × 10 4 kg
A reinforcing member made of a polymer material having a bending elastic modulus of f / cm 2 or less and a bending elastic modulus of 1% or more and 50% or less of the bending elastic modulus of the intermediate transfer belt is provided.
【０００９】ここで、上記本発明の画像形成装置におい
て、上記補強部材が、フッ素樹脂からなることが好まし
い。また、上記補強部材は、中間転写体ベルトの幅方向
の端部に沿って、その中間転写体ベルトの表面および裏
面のうちの少なくとも一方の面に貼付された、一面に粘
着剤が付されたテープ状のものであることが好ましい。In the image forming apparatus of the present invention, it is preferable that the reinforcing member is made of fluororesin. The reinforcing member is attached to at least one of the front surface and the back surface of the intermediate transfer belt along the widthwise end portion of the intermediate transfer belt, and has an adhesive on one surface. It is preferably in the form of a tape.
【００１０】ここで、曲げ弾性率とは、ＪＩＳ・Ｋ７２
０３「硬質プラスチックの曲げ試験方法」の規定により
測定した値であって、２点で支持された所定の試験片の
中央に一定速度で荷重を加えることにより生じた試験片
のたわみを測定し、（１）式によって算出されるものを
いう。 Ｅf ＝（Ｌ／４ｂｈ）・（Ｆ／Ｙ） ……（１） ここに、 Ｅf ：弾性率（ｋｇｆ／ｍｍ2 ）｛Ｎ／ｍｍ2 ｝ Ｌ：支点間距離（ｍｍ） ｂ：試験片の幅（ｍｍ） ｈ：試験片の高さ（ｍｍ） Ｆ：荷重−たわみ曲線の初めの直線部分の任意に選んだ
点の荷重（ｋｇｆ）｛Ｎ｝ Ｙ：荷重Ｆにおけるたわみ（ｍｍ） である。Here, the bending elastic modulus is JIS K72.
It is a value measured according to the regulations of 03 "bending test method of hard plastic", and the deflection of the test piece generated by applying a load at a constant speed to the center of a predetermined test piece supported at two points is measured, It is calculated by the equation (1). E f = (L / 4bh) · (F / Y) (1) where, E f : Modulus of elasticity (kgf / mm 2 ) {N / mm 2 } L: Distance between fulcrums (mm) b: Test Width of the piece (mm) h: Height of the test piece (mm) F: Load-deflection at the arbitrarily selected point of the first linear portion of the deflection curve (kgf) {N} Y: Deflection at the load F (mm) Is.
【００１１】[0011]
【作用】本発明の画像形成装置は、その中間転写体ベル
トの幅方向の端部に固着された高分子材料の補強部材を
備えたものであり、その補強部材は、中間転写体ベルト
の曲げ弾性率の１％以上５０％以下の範囲の曲げ弾性率
を有するもので、概略的な表現をすれば、中間転写体ベ
ルトの曲げ弾性率と比べ十分に低い曲げ弾性率を有する
ものであるため、ベルト端部に力が加わると補強部材が
変形して応力を吸収し、応力が中間転写体ベルト本体に
集中するのを防止することができる。また、この補強部
材は曲げ弾性率が１×１０4 ｋｇｆ／ｃｍ2 以下であっ
て、曲げ弾性率が比較的低いため、曲げ弾性率の高い部
材のようにヒビ割れが発生しにくい。このように、補強
部材が応力を吸収すること、および補強部材がヒビ割れ
しにくいことから、中間転写体ベルトを長期間使用して
も画像領域にヒビ割れが入って使用不可能になることが
防止される。The image forming apparatus of the present invention comprises a reinforcing member made of a polymer material fixed to the widthwise end of the intermediate transfer belt, and the reinforcing member is a bending member of the intermediate transfer belt. It has a flexural modulus in the range of 1% or more and 50% or less of the elastic modulus, and in a rough expression, it has a flexural modulus sufficiently lower than the flexural modulus of the intermediate transfer belt. When a force is applied to the end portion of the belt, the reinforcing member is deformed to absorb the stress, and the stress can be prevented from being concentrated on the intermediate transfer belt body. Further, this reinforcing member has a flexural modulus of 1 × 10 4 kgf / cm 2 or less and a relatively low flexural modulus, and thus cracks are unlikely to occur unlike a member having a high flexural modulus. As described above, since the reinforcing member absorbs the stress and the reinforcing member is less likely to be cracked, even if the intermediate transfer belt is used for a long period of time, the image area may crack and become unusable. To be prevented.
【００１２】この補強部材は、中間転写体ベルトの幅方
向の両端部双方に沿うように固着されていてもよいが、
例えば中間転写体ベルトの所定の一端部側のみがベルト
位置規制部材等に押しつけられるように構成した場合等
には、この補強部材は、中間転写体ベルトの幅方向の、
ベルト位置規制部材等に押しつけられる一端部側にのみ
固着されていてもよい。The reinforcing member may be fixed so as to extend along both ends of the intermediate transfer belt in the width direction.
For example, in the case where only a predetermined one end side of the intermediate transfer belt is configured to be pressed against the belt position regulating member or the like, the reinforcing member is provided in the width direction of the intermediate transfer belt.
It may be fixed only to one end side which is pressed against the belt position regulating member or the like.
【００１３】補強部材としてフッ素樹脂を用いると、加
塑剤が像担持体を汚染したり、トナーがこびり付いて像
担持体を傷つけたり転写材を汚したりすることがない。
また、補強部材を粘着面を持つテープ材とすると、十分
な接着強度が得られ、かつ接着剤がはみ出したり接着ム
ラができたりすることがない。上述のように、本発明に
おける補強部材は、その曲げ強度が１×１０4 ｋｇｆ／
ｃｍ2 以下のものである。この曲げ強度を越えると前述
した従来技術の如く、補強部材が硬すぎて補強部材にヒ
ビ割れ等が生じ中間転写体ベルトを多数回回転させてい
るうちに中間転写体ベルト自体が使用不能な状態となり
易い。When a fluororesin is used as the reinforcing member, the plasticizer does not contaminate the image carrier, and the toner does not stick to the image carrier to damage the image carrier or stain the transfer material.
Further, when the reinforcing member is a tape material having an adhesive surface, sufficient adhesive strength can be obtained, and the adhesive does not squeeze out or the adhesive becomes uneven. As described above, the reinforcing member of the present invention has a bending strength of 1 × 10 4 kgf /
cm 2 or less. When the bending strength is exceeded, the reinforcing member is too hard and cracks occur in the reinforcing member as in the prior art described above, and the intermediate transfer belt itself cannot be used while the intermediate transfer belt is rotated many times. It is easy to become.
【００１４】また、本発明における補強部材は、その曲
げ強度が中間転写体ベルトの曲げ強度の１％〜５０％の
範囲のものである。本発明は、上述のように中間転写体
ベルトの端部がベルト位置規制部材に押し当てられたと
きに補強部材にその応力の吸収を担わせるものであり、
補強部材は中間転写体ベルトよりも十分やわらかい必要
がある。補強部材の曲げ強度が中間転写体ベルトの曲げ
強度の５０％を越えると中間転写体ベルトに比べ十分や
わらかいとはいい難く、ベルト位置規制部材等から受け
る力の大きな割合が中間転写体ベルトに加わり、中間転
写体ベルトを多数回回転させているうちに中間転写体ベ
ルトが使用不能な状態となり易い。一方、補強部材の曲
げ強度が中間転写体ベルトの曲げ強度の１％よりも低い
と、補強部材がやわらか過ぎてベルト位置規制部材等か
ら受ける力を補強部材では十分には吸収できず、やはり
中間転写体ベルト自体に大きな力が加わり、中間転写体
ベルトの寿命に問題が生じる。The bending strength of the reinforcing member of the present invention is in the range of 1% to 50% of the bending strength of the intermediate transfer belt. The present invention allows the reinforcing member to absorb the stress when the end portion of the intermediate transfer belt is pressed against the belt position regulating member as described above,
The reinforcing member needs to be sufficiently softer than the intermediate transfer belt. If the bending strength of the reinforcing member exceeds 50% of the bending strength of the intermediate transfer belt, it cannot be said that it is sufficiently soft as compared with the intermediate transfer belt, and a large proportion of the force received from the belt position regulating member, etc. is added to the intermediate transfer belt. While the intermediate transfer belt is rotating many times, the intermediate transfer belt is likely to be unusable. On the other hand, if the bending strength of the reinforcing member is lower than 1% of the bending strength of the intermediate transfer belt, the reinforcing member is too soft and the reinforcing member cannot sufficiently absorb the force received from the belt position restricting member. A large force is applied to the transfer belt itself, which causes a problem in the life of the intermediate transfer belt.
【００１５】尚、補強部材が、曲げ弾性率１×１０4 ｋ
ｇｆ／ｃｍ2 以下であって、かつ中間転写体ベルトの曲
げ弾性率の１％以上５０％以下の範囲内である条件のう
ち、補強部材の曲げ弾性率の、中間転写体ベルトの曲げ
弾性率に対する比率は、１％以上２０％以内であること
が、上述の理由により更に好ましい。また補強部材が上
記要件を満足するとともに、中間転写体ベルトが、曲げ
弾性率２×１０4 ｋｇｆ／ｃｍ2 以上であることが好ま
しい。中間転写体ベルトがやわらかすぎてもやはり中間
転写体ベルトの寿命に問題が生じる恐れがあるからであ
る。The reinforcing member has a bending elastic modulus of 1 × 10 4 k.
Under the condition of gf / cm 2 or less and within the range of 1% or more and 50% or less of the bending elastic modulus of the intermediate transfer belt, the bending elastic modulus of the reinforcing member is equal to the bending elastic modulus of the intermediate transfer belt. Is more preferably 1% or more and 20% or less for the above reason. Further, it is preferable that the reinforcing member satisfies the above requirements and the intermediate transfer belt has a bending elastic modulus of 2 × 10 4 kgf / cm 2 or more. Even if the intermediate transfer belt is too soft, the life of the intermediate transfer belt may still be problematic.
【００１６】[0016]
【実施例】以下に、本発明の実施例を図面に基づいて説
明する。図１は、本発明の一実施例に係る画像形成装置
の概略構成図である。図１に示す画像形成装置には、像
担持体としての感光体ドラム１が備えられており、この
感光体ドラム１は図示の矢印Ａ方向に回転し、感光体ド
ラム１の周囲に備えられた図示しない一次帯電器、画像
露光手段、現像器等の電子写真プロセスを実行する手段
によってトナー像Ｔが形成される。本実施例では、感光
体ドラム１の周速は２２０ｍｍ／秒である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of an image forming apparatus according to an embodiment of the present invention. The image forming apparatus shown in FIG. 1 is provided with a photosensitive drum 1 as an image carrier, and the photosensitive drum 1 is provided around the photosensitive drum 1 by rotating in the direction of arrow A shown in the drawing. The toner image T is formed by means of an electrophotographic process such as a primary charger, an image exposing means, and a developing device, which are not shown. In this embodiment, the peripheral speed of the photosensitive drum 1 is 220 mm / sec.
【００１７】また、この画像形成装置には複数のロール
間に掛けまわされた無端の中間転写体ベルト２が備えら
れており、この中間転写体ベルト２は、１次転写位置に
おいて感光体ドラム１の表面に当接または近接するよう
に配置されている。この中間転写体ベルト２は、駆動ロ
ール４により、図示の矢印Ｂ方向に、感光体ドラム１の
周速と等速度で回転される。この駆動ロール４は、図示
しないステッピングモータにより駆動される。駆動ロー
ル４の一端にはロータリエンコーダ（図示せず）が取り
付けられており、このロータリエンコーダで駆動ロール
４の回転数が測定され、その測定結果が駆動ロールモー
タドライバ（図示せず）にフィードバックされ、駆動ロ
ール４の回転数が一定になるように制御される。Further, the image forming apparatus is provided with an endless intermediate transfer belt 2 wound around a plurality of rolls, and the intermediate transfer belt 2 is at the primary transfer position at the photosensitive drum 1. Is arranged so as to abut or approach the surface of the. The intermediate transfer belt 2 is rotated by the drive roll 4 in the direction of the arrow B at the same speed as the peripheral speed of the photosensitive drum 1. The drive roll 4 is driven by a stepping motor (not shown). A rotary encoder (not shown) is attached to one end of the drive roll 4, the rotational speed of the drive roll 4 is measured by this rotary encoder, and the measurement result is fed back to a drive roll motor driver (not shown). The rotation speed of the drive roll 4 is controlled to be constant.
【００１８】また、中間転写体ベルト２は、この中間転
写体ベルト２の蛇行を防止するためのベルト蛇行防止ロ
ール５にも掛けまわされており、このベルト蛇行防止ロ
ール５の両端部には、図２に示すごとく、ベルト蛇行規
制部材１１が設けられており、中間転写体ベルト２の端
部をベルト蛇行規制部材１１に矢印Ｃ方向に突き当てる
ことで、ベルトの左右の周長差、ロール外径の誤差、ロ
ール回転軸の傾き等に起因するベルトの蛇行（ベルト進
行方向に対して垂直な方向への移動）が防止される。本
実施例では、中間転写体ベルト２をベルト蛇行規制部材
１１に押し付ける力は、０．５〜３ｋｇｆに設定されて
いる。The intermediate transfer belt 2 is also wound around a belt meandering prevention roll 5 for preventing the meandering of the intermediate transfer body belt 2. At both ends of the belt meandering prevention roll 5, As shown in FIG. 2, a belt meandering restricting member 11 is provided, and by abutting the end of the intermediate transfer belt 2 against the belt meandering restricting member 11 in the direction of arrow C, the difference between the left and right circumferential lengths of the belt, the roll It is possible to prevent the belt from meandering (moving in a direction perpendicular to the belt traveling direction) due to an outer diameter error, a roll rotation shaft inclination, and the like. In this embodiment, the force for pressing the intermediate transfer belt 2 against the belt meandering regulation member 11 is set to 0.5 to 3 kgf.
【００１９】中間転写体ベルト２には、スプリング等
（図示せず）により中間転写体ベルト２を外側に押すよ
うに配置されたテンションロール６（図１参照）によ
り、所定の張力が与えられている。本実施例では、その
張力は４〜６ｋｇｆに調整されている。さらに、中間転
写体ベルト２は、２次転写用バイアスロール９に対向す
る対向ロール７、および中間転写体ベルトクリーナ１０
に対向する対向ロール８に掛けまわされている。２次転
写用バイアスロール９とそれに対向する対向ロール７と
の間の２次転写位置には、後述するようにして、転写材
１３が供給される。また、中間転写体ベルト２の１次転
写位置の背面側には、１次転写用コロナ放電器１２が配
設されている。この１次転写用コロナ放電器１２には、
感光体ドラム１上のトナーの帯電極性と逆極性の電圧が
印加され放電が行われる。A predetermined tension is applied to the intermediate transfer belt 2 by a tension roll 6 (see FIG. 1) arranged so as to push the intermediate transfer belt 2 to the outside by a spring or the like (not shown). There is. In this embodiment, the tension is adjusted to 4 to 6 kgf. Further, the intermediate transfer body belt 2 includes an opposing roll 7 facing the secondary transfer bias roll 9 and an intermediate transfer body belt cleaner 10.
It is wound around a counter roll 8 facing the. The transfer material 13 is supplied to the secondary transfer position between the secondary transfer bias roll 9 and the opposing roll 7 facing the secondary transfer bias roll 9 as described later. A primary transfer corona discharger 12 is disposed on the back side of the primary transfer position of the intermediate transfer belt 2. In this primary transfer corona discharger 12,
A voltage having a polarity opposite to the charging polarity of the toner on the photoconductor drum 1 is applied and discharging is performed.
【００２０】次に、上記構成中の中間転写体ベルト２を
備えた画像形成装置の動作を説明する。動作開始信号に
より、感光体ドラム１上にトナー像Ｔが形成されるとと
もに、中間転写体ベルト２も感光体ドラムの周速と略同
速（本実施例では２２０ｍｍ／秒）で移動し、感光体ド
ラム１と中間転写体ベルト２が当接または近接する１次
転写位置へ移動したトナー像Ｔは、１次転写用コロナ放
電器１２の作用により中間転写体ベルト２上に静電的に
転写（１次転写）される。カラー画像形成装置の場合、
各トナー色に応じこの動作が３〜４回繰り返される。こ
の１次転写の動作の間、２次転写用バイアスロール９は
中間転写体ベルト２から離間しており、転写材１３も２
次転写位置よりも上流側で待機している。１次転写が終
了したトナー像が２次転写位置へ移動するのに合わせて
転写材１３が２次転写位置に送られるとともに、２次転
写用バイアスロール９が中間転写体ベルト２に当接す
る。２次転写位置に移動したトナー像Ｔと転写材１３
は、中間転写体ベルト２と２次転写用バイアスロール９
の間に挾持され、転写材１３上にトナー像が静電的に転
写され２次転写が実行される。２次転写の終了した転写
材１３は、図示しない定着装置に送られ定着が行われ
る。中間転写体ベルト２上に残ったトナーは、中間転写
体ベルトクリーナ１０によって取り除かれ、次の画像形
成動作に備えられる。Next, the operation of the image forming apparatus provided with the intermediate transfer belt 2 having the above structure will be described. A toner image T is formed on the photoconductor drum 1 by the operation start signal, and the intermediate transfer belt 2 also moves at a speed substantially equal to the peripheral speed of the photoconductor drum (220 mm / sec in this embodiment). The toner image T moved to the primary transfer position where the body drum 1 and the intermediate transfer belt 2 are in contact with or close to each other is electrostatically transferred onto the intermediate transfer belt 2 by the action of the corona discharger 12 for primary transfer. (Primary transfer). In the case of a color image forming device,
This operation is repeated 3 to 4 times according to each toner color. During this primary transfer operation, the secondary transfer bias roll 9 is separated from the intermediate transfer belt 2, and the transfer material 13 is also 2
It is waiting on the upstream side of the next transfer position. The transfer material 13 is sent to the secondary transfer position as the toner image on which the primary transfer is completed moves to the secondary transfer position, and the secondary transfer bias roll 9 contacts the intermediate transfer belt 2. The toner image T moved to the secondary transfer position and the transfer material 13
Is the intermediate transfer belt 2 and the secondary transfer bias roll 9
In between, the toner image is electrostatically transferred onto the transfer material 13 and the secondary transfer is executed. The transfer material 13 after the secondary transfer is sent to a fixing device (not shown) to be fixed. The toner remaining on the intermediate transfer body belt 2 is removed by the intermediate transfer body belt cleaner 10 to prepare for the next image forming operation.
【００２１】上記構造の画像形成装置を用いて、中間転
写体ベルトの耐久性テストを行った。実験に用いたベル
トは、周長６３３．５ｍｍ、幅３２０ｍｍの無端状ベル
トである。 この中間転写体ベルトは、ＰＶｄＦ（ポリ
フッ化ビニリデン）、ＰＩ（ポリイミド）、ＰＥＴ（ポ
リエチレンテレフタレート）またはＰＣ（ポリカーボネ
ート）の中のいずれか一種にＣＢ（カーボンブラック）
等の抵抗制御剤を混入して体積抵抗率を１０12〜１０15
Ωｃｍに調整したものを材料として用いた、５０〜３０
０μｍの厚さのものである。この範囲より抵抗が低い場
合は、転写トナー像の飛び散りが激しく画像が劣化し、
抵抗が高い場合は中間転写体ベルトの帯電が大きく、均
一に安定して除電することができず、やはり画像が劣化
した。またこの範囲より薄い材料を用いた場合、機械的
強度が著しく低く実用に耐えず、厚い場合は転写に必要
な電圧が高くなりすぎ良好な画像を得ることができなか
った。A durability test of the intermediate transfer belt was conducted using the image forming apparatus having the above structure. The belt used in the experiment is an endless belt having a circumference of 633.5 mm and a width of 320 mm. This intermediate transfer belt is made of PVdF (polyvinylidene fluoride), PI (polyimide), PET (polyethylene terephthalate) or PC (polycarbonate), and CB (carbon black).
Volume resistance of 10 12 to 10 15 by mixing a resistance control agent such as
50 to 30 using a material adjusted to Ωcm as a material
It has a thickness of 0 μm. If the resistance is lower than this range, the transfer toner image is greatly scattered and the image deteriorates,
When the resistance was high, the charge on the intermediate transfer belt was large, and the charge could not be removed uniformly and stably, and the image was deteriorated. Further, when a material thinner than this range was used, the mechanical strength was remarkably low and it could not be used practically, and when it was thick, the voltage required for transfer was too high to obtain a good image.
【００２２】中間転写体ベルト２の両端部の裏表には、
図３（ａ）に示すように補強部材３を接着した。尚、図
３（ｂ）に示すように補強部材３を中間転写体ベルト２
の受像面側にのみ設けることも可能であり、このように
することによって補強部材３の量を半分ですませること
ができる。この補強部材３の材質としては、前述のＪＩ
Ｓの規定による曲げ弾性率が１×１０4 （ｋｇｆ／ｃｍ
2 ）以下であって、かつ上記中間転写体ベルト２の曲げ
弾性率の１％〜５０％に相当する曲げ弾性率を持つもの
である必要がある。On both sides of the intermediate transfer belt 2,
The reinforcing member 3 was bonded as shown in FIG. In addition, as shown in FIG. 3B, the reinforcing member 3 is attached to the intermediate transfer belt 2.
It is also possible to provide only on the image receiving surface side of, and by doing so, the amount of the reinforcing member 3 can be halved. As the material of the reinforcing member 3, the above-mentioned JI
Flexural modulus according to S is 1 × 10 4 (kgf / cm
2 ) It is necessary to have a flexural modulus of less than or equal to 1% to 50% of the flexural modulus of the intermediate transfer belt 2.
【００２３】上記範囲の中でも、特に、中間転写体ベル
ト２の曲げ弾性率が２×１０4 （ｋｇｆ／ｃｍ2 ）以上
であって、かつ中間転写体ベルト２の曲げ弾性率の１％
〜２０％に相当する曲げ弾性率を持つ補強部材であるこ
とが望ましい。具体例として、厚さ２０〜１００μｍ、
幅１０〜４０ｍｍのＰＴＦＥ（ポリテトラフルオロエチ
レン）、ＰＦＡ（テトラフルオロエチレン−パーフルオ
ロアルキルビニルエーテル共重合体）、ＦＥＰ（テトラ
フルオロエチレン−ヘキサフルオロプロピレン共重合
体）等を用いることが望ましい。Within the above range, the bending elastic modulus of the intermediate transfer belt 2 is 2 × 10 4 (kgf / cm 2 ) or more, and the bending elastic modulus of the intermediate transfer belt 2 is 1%.
It is desirable that the reinforcing member has a bending elastic modulus equivalent to 20%. As a specific example, the thickness is 20 to 100 μm,
It is desirable to use PTFE (polytetrafluoroethylene), PFA (tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer), FEP (tetrafluoroethylene-hexafluoropropylene copolymer), etc. having a width of 10 to 40 mm.
【００２４】中間転写体ベルト２に接着剤を塗布して補
強部材３を接着したところ、中間転写体ベルト２に塗布
した接着剤の量の多少によっては、接着剤が中間転写体
ベルト２の画像領域まではみ出す部分や、十分に接着剤
が塗布できない部分などが生じた。このようにして形成
した中間転写体ベルトで、耐久性テストを行おうとした
ところ、接着剤が中間転写体ベルト２の画像領域までは
み出した部分では初期から画質に欠陥が生じた。また十
分に接着剤が塗布できなかった部分では、ベルトが数千
回転すると補強部材３が剥がれ始め、その機能を失っ
た。When an adhesive is applied to the intermediate transfer belt 2 and the reinforcing member 3 is adhered to the intermediate transfer belt 2, depending on the amount of the adhesive applied to the intermediate transfer belt 2, the adhesive may form an image on the intermediate transfer belt 2. There were some parts protruding to the area and some parts where the adhesive could not be applied sufficiently. When an endurance test was performed on the intermediate transfer belt formed in this manner, a defect in image quality occurred from the initial stage in a portion where the adhesive spilled out to the image area of the intermediate transfer belt 2. Further, in the area where the adhesive could not be applied sufficiently, the reinforcing member 3 began to peel off when the belt rotated several thousand times, and its function was lost.
【００２５】一方、補強部材３として、粘着面を有する
ものを用いた場合、上述のような問題は発生しなかった
ため、この粘着面を有する補強部材３を用いて耐久テス
トを行った。耐久テストの結果を、比較例とともに表１
に示す。On the other hand, when the reinforcing member 3 having an adhesive surface was used, the above-mentioned problems did not occur, so a durability test was conducted using the reinforcing member 3 having this adhesive surface. The results of the durability test are shown in Table 1 together with comparative examples.
Shown in
【００２６】[0026]
【表１】 [Table 1]
【００２７】表１中の中間転写体ベルト２と補強部材３
との組合せのテスト結果のいくつかについて説明する。 （１）テスト１（比較例）：中間転写体ベルトがＰＣ、
補強部材がＰＥＴの場合 中間転写体ベルトが３万回転すると、まずＰＣの端部に
ヒビ割れが始まり、その後ＰＥＴが割れ出し、徐々に割
れが大きくなり、ベルトが１０万回転すると実用に耐え
ない程度（ベルトの全周にヒビ割れが生じ、それらが画
像領域に及ぶ）にまで破損が進んだ。Intermediate transfer belt 2 and reinforcing member 3 in Table 1
Some of the test results of the combination with and are explained. (1) Test 1 (comparative example): the intermediate transfer belt is PC,
When the reinforcing member is PET When the intermediate transfer belt rotates 30,000 times, cracks start at the edge of the PC, then PET begins to crack, and the crack gradually grows, and the belt cannot be put to practical use when it rotates 100,000 times. The damage progressed to a degree (cracks were formed on the entire circumference of the belt, and they spread over the image area).
【００２８】（２）テスト２（実施例）：中間転写体ベ
ルトがＰＣで、補強部材がＰＴＦＥの場合 中間転写体ベルトが３万回転するとやはりＰＣの端部に
ヒビ割れが始まるが、ヒビ割れの長さは１〜３ｍｍ程度
以上には伸びず、１００万回転後も使用可能であり、上
記比較例に比べて、１０倍以上の寿命が得られた。(2) Test 2 (Example): When the intermediate transfer belt is PC and the reinforcing member is PTFE When the intermediate transfer belt rotates 30,000 times, cracks will start at the edges of the PC, but cracks will still occur. The length did not extend to about 1 to 3 mm or more, and it was usable even after 1 million rotations, and the life was 10 times or more that of the comparative example.
【００２９】（３）テスト３（比較例）：中間転写体ベ
ルトがＰＩで、補強部材がＰＥＴの場合 中間転写体ベルトが３万回転すると、ＰＩの端部に欠け
が生じ、その後欠けた部分から補強部材のＰＥＴがヒビ
割れ始めた。その後時間が経つにつれヒビ割れが長くな
っていき、中間転写体ベルトが１００万回転すると実用
に耐えない程度（ベルトの数カ所にヒビ割れが生じ、そ
れらが画像領域に及ぶ）にまで破損が進んだ。(3) Test 3 (Comparative Example): When the intermediate transfer belt is PI and the reinforcing member is PET When the intermediate transfer belt rotates 30,000 times, a chip is formed at the end of the PI, and then the chipped part is formed. The PET of the reinforcing member started to crack. After that, the cracks became longer with the passage of time, and when the belt of the intermediate transfer member was rotated 1,000,000 times, it was damaged to such an extent that it could not be used practically (cracks were generated at several places on the belt, and they spread to the image area). .
【００３０】（４）テスト４（実施例）：中間転写体ベ
ルトがＰＩで、補強部材がＰＴＦＥの場合 中間転写体ベルトが３万回転すると、やはりＰＩの端部
がヒビ割れ始めるが、ヒビ割れの長さは１〜３ｍｍ程度
以上には伸びず、１００万回転後も使用可能であり、上
記比較例に比べて、１０倍以上の寿命が得られた。(4) Test 4 (Example): When the intermediate transfer belt is PI and the reinforcing member is PTFE When the intermediate transfer belt rotates 30,000 times, the end of PI also begins to crack, but cracks occur. The length did not extend to about 1 to 3 mm or more, and it was usable even after 1 million rotations, and the life was 10 times or more that of the comparative example.
【００３１】（５）テスト５（比較例）：補強部材がＳ
Ｉ（シリコンゴム）の場合 中間転写体ベルトがＰＣであっても、ＰＩであっても、
数千回転で転写画像に実用に耐えない欠陥が生じた。
尚、表１に示す組合せ以外にも、中間転写体ベルトとし
てＰＶＦ（ポリフッ化ビニル）も使用可能であり、補強
部材としてＰＴＦＥ，ＰＦＡ，ＦＥＰのいずれを用いた
場合も１００万回転以上使用可能であった。(5) Test 5 (Comparative Example): The reinforcing member is S
In the case of I (silicon rubber) Whether the intermediate transfer belt is PC or PI,
After several thousand rotations, the transferred image had defects that were not practical.
In addition to the combinations shown in Table 1, PVF (polyvinyl fluoride) can be used as the intermediate transfer belt, and even if PTFE, PFA, or FEP is used as the reinforcing member, it can be used for 1 million rotations or more. there were.
【００３２】[0032]
【発明の効果】以上説明したように、本発明の画像形成
装置は、中間転写体ベルト端部の補強部材の曲げ弾性率
が中間転写体ベルト本体の曲げ弾性率より十分低いの
で、中間転写体ベルト端部に力が加わると端部の補強部
材が変形して応力を吸収し、中間転写体ベルトの端部に
ヒビ割れが生じるのが防止される。また補強部材自身が
ヒビ割れることもなく、十分なベルト寿命を得ることが
できる。As described above, according to the image forming apparatus of the present invention, since the bending elastic modulus of the reinforcing member at the end portion of the intermediate transfer belt is sufficiently lower than the bending elastic modulus of the intermediate transfer belt main body, When a force is applied to the end portion of the belt, the reinforcing member at the end portion is deformed and absorbs the stress, so that the end portion of the intermediate transfer belt is prevented from being cracked. Further, the reinforcing member itself is not cracked, and a sufficient belt life can be obtained.
【００３３】また、上記補強部材としてフッ素樹脂を用
いた場合、その補強部材から加塑剤が流出して感光体を
汚染したり、補強部材にトナーが固着して感光体を傷つ
けたり、転写材を汚したりすることもなくなる。さら
に、一面に粘着剤が付されたテープ状の補強部材を用い
ることにより、補強部材が中間転写体ベルトから剥がれ
たり、接着剤がはみ出して中間転写体を汚染したりする
ことがなくなる。When a fluororesin is used as the reinforcing member, a plasticizer flows out from the reinforcing member to contaminate the photoconductor, or toner adheres to the reinforcing member to damage the photoconductor, or a transfer material is used. There is no need to pollute. Furthermore, by using a tape-shaped reinforcing member having an adhesive on one surface, the reinforcing member does not peel off from the intermediate transfer belt or the adhesive does not stick out and contaminate the intermediate transfer member.
【図１】本発明の一実施例に係る画像形成装置の概略構
成図である。FIG. 1 is a schematic configuration diagram of an image forming apparatus according to an embodiment of the present invention.
【図２】図１に示す実施例のベルト蛇行防止ロールの部
を示す図である。FIG. 2 is a view showing a part of a belt meandering prevention roll of the embodiment shown in FIG.
【図３】中間転写体ベルトの断面図である。FIG. 3 is a sectional view of an intermediate transfer belt.
１ 感光体ドラム ２ 中間転写体ベルト ３ 補強部材 ４ 駆動ロール ５ ベルト蛇行防止ロール ６ テンションロール ７ ２次転写対向ロール ８ クリーナ対向ロール ９ ２次転写用バイアスロール １０ 中間転写体ベルトクリーナ １１ ベルト蛇行規制部材 １２ １次転写用コロトロン １３ 転写材 DESCRIPTION OF SYMBOLS 1 Photoconductor drum 2 Intermediate transfer belt 3 Reinforcing member 4 Driving roll 5 Belt meandering prevention roll 6 Tension roll 7 Secondary transfer counter roll 8 Cleaner counter roll 9 Secondary transfer bias roll 10 Intermediate transfer belt cleaner 11 Belt meandering regulation Member 12 Corotron for primary transfer 13 Transfer material
Claims (3)
像して得たトナー像が転写されるとともに、転写された
トナー像を転写材に転写する中間転写体ベルトを供えた
画像形成装置において、 前記中間転写体ベルトの、幅方向の少なくとも一方の端
部に沿って該中間転写体ベルトに固着された、曲げ弾性
率が１×１０4 ｋｇｆ／ｃｍ2 以下であって、かつ、該
中間転写体ベルトの曲げ弾性率の１％以上５０％以下の
範囲の曲げ弾性率を有する高分子材料からなる補強部材
を備えたことを特徴とする画像形成装置。1. An image forming apparatus comprising an intermediate transfer belt for transferring a toner image obtained by developing a latent image formed on an image carrier with toner, and transferring the transferred toner image onto a transfer material. In the apparatus, the bending elastic modulus fixed to the intermediate transfer belt along at least one end of the intermediate transfer belt along the width direction is 1 × 10 4 kgf / cm 2 or less, and An image forming apparatus comprising: a reinforcing member made of a polymer material having a bending elastic modulus in the range of 1% to 50% of the bending elastic modulus of the intermediate transfer belt.
とを特徴とする特許請求の範囲第１項記載の画像形成装
置。2. The image forming apparatus according to claim 1, wherein the reinforcing member is made of fluororesin.
の幅方向の端部に沿って、該中間転写体ベルトの表面お
よび裏面のうちの少なくとも一方の面に貼付された、一
面に粘着剤が付されたテープ状の補強部材であることを
特徴とする請求項１又は２記載の画像形成装置。3. The pressure-sensitive adhesive on one surface, wherein the reinforcing member is attached to at least one of the front surface and the back surface of the intermediate transfer belt along the widthwise end of the intermediate transfer belt. The image forming apparatus according to claim 1, wherein the image forming apparatus is a tape-shaped reinforcing member provided with a mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20216594A JP3326981B2 (en) | 1994-08-26 | 1994-08-26 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20216594A JP3326981B2 (en) | 1994-08-26 | 1994-08-26 | Image forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0863000A true JPH0863000A (en) | 1996-03-08 |
| JP3326981B2 JP3326981B2 (en) | 2002-09-24 |
Family
ID=16453044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20216594A Expired - Fee Related JP3326981B2 (en) | 1994-08-26 | 1994-08-26 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3326981B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1138792A (en) * | 1997-02-28 | 1999-02-12 | Canon Inc | Image forming device and intermediate transfer belt |
| EP0867784A3 (en) * | 1997-02-28 | 1999-05-19 | Canon Kabushiki Kaisha | Image forming apparatus and intermediate transfer belt |
| US6223015B1 (en) * | 1997-01-31 | 2001-04-24 | Seiko Epson Corporation | Recording medium carrier system intermediate transfer unit |
| US6731899B2 (en) | 1997-01-31 | 2004-05-04 | Seiko Epson Corporation | Intermediate transfer unit |
| US6856782B2 (en) | 1997-01-31 | 2005-02-15 | Seiko Epson Corporation | Intermediate transfer unit having a primary and a secondary transfer member |
| JP2005221549A (en) * | 2004-02-03 | 2005-08-18 | Ricoh Co Ltd | Belt driving device and image forming apparatus equipped with same |
| JP2006126654A (en) * | 2004-10-29 | 2006-05-18 | Canon Inc | Image forming apparatus ,and method and program for driving control |
| JP2007155981A (en) * | 2005-12-02 | 2007-06-21 | Ricoh Printing Systems Ltd | Image forming apparatus |
| US7286779B2 (en) | 2002-09-18 | 2007-10-23 | Ricoh Company, Ltd. | Apparatus for suppressing deformations in a belt of an image forming device |
| US20120294657A1 (en) * | 2011-05-20 | 2012-11-22 | Makoto Matsushita | Belt-shaped member for image forming apparatus and image forming apparatus |
| CN105573080A (en) * | 2014-10-31 | 2016-05-11 | 兄弟工业株式会社 | Image forming apparatus |
-
1994
- 1994-08-26 JP JP20216594A patent/JP3326981B2/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6223015B1 (en) * | 1997-01-31 | 2001-04-24 | Seiko Epson Corporation | Recording medium carrier system intermediate transfer unit |
| US6731899B2 (en) | 1997-01-31 | 2004-05-04 | Seiko Epson Corporation | Intermediate transfer unit |
| US6856782B2 (en) | 1997-01-31 | 2005-02-15 | Seiko Epson Corporation | Intermediate transfer unit having a primary and a secondary transfer member |
| US6957032B2 (en) | 1997-01-31 | 2005-10-18 | Seiko Epson Corporation | Intermediate transfer unit having a primary transfer member and a secondary transfer roller |
| US7187893B2 (en) | 1997-01-31 | 2007-03-06 | Seiko Epson Corporation | Image transfer unit having an intermediate transfer belt to which a toner image is applied |
| EP0867784A3 (en) * | 1997-02-28 | 1999-05-19 | Canon Kabushiki Kaisha | Image forming apparatus and intermediate transfer belt |
| US5995794A (en) * | 1997-02-28 | 1999-11-30 | Canon Kabushiki Kaisha | Image forming apparatus and intermediate transfer belt |
| JPH1138792A (en) * | 1997-02-28 | 1999-02-12 | Canon Inc | Image forming device and intermediate transfer belt |
| US7286779B2 (en) | 2002-09-18 | 2007-10-23 | Ricoh Company, Ltd. | Apparatus for suppressing deformations in a belt of an image forming device |
| JP2005221549A (en) * | 2004-02-03 | 2005-08-18 | Ricoh Co Ltd | Belt driving device and image forming apparatus equipped with same |
| JP2006126654A (en) * | 2004-10-29 | 2006-05-18 | Canon Inc | Image forming apparatus ,and method and program for driving control |
| JP2007155981A (en) * | 2005-12-02 | 2007-06-21 | Ricoh Printing Systems Ltd | Image forming apparatus |
| US20120294657A1 (en) * | 2011-05-20 | 2012-11-22 | Makoto Matsushita | Belt-shaped member for image forming apparatus and image forming apparatus |
| US8886096B2 (en) * | 2011-05-20 | 2014-11-11 | Ricoh Company, Ltd. | Belt-shaped member for image forming apparatus and image forming apparatus |
| CN105573080A (en) * | 2014-10-31 | 2016-05-11 | 兄弟工业株式会社 | Image forming apparatus |
| JP2016090679A (en) * | 2014-10-31 | 2016-05-23 | ブラザー工業株式会社 | Image forming apparatus |
| US10031462B2 (en) | 2014-10-31 | 2018-07-24 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus |
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|---|---|
| JP3326981B2 (en) | 2002-09-24 |
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