JPH05297739A - Image forming method - Google Patents
Image forming methodInfo
- Publication number
- JPH05297739A JPH05297739A JP4100770A JP10077092A JPH05297739A JP H05297739 A JPH05297739 A JP H05297739A JP 4100770 A JP4100770 A JP 4100770A JP 10077092 A JP10077092 A JP 10077092A JP H05297739 A JPH05297739 A JP H05297739A
- Authority
- JP
- Japan
- Prior art keywords
- transfer
- toner
- image
- belt
- intermediate carrier
- 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]
【産業上の利用分野】この発明は、複写機、プリンタ、
ファクシミリ等の電子写真方式を用いた画像形成方法に
関し、詳しくは像担持体上から転移されたトナー像を担
持し、像担持体へ転移させる工程までトナー像を搬送す
る中間担持体を有する画像形成方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine, a printer,
More specifically, the present invention relates to an image forming method using an electrophotographic method such as a facsimile, and more specifically, an image forming method that has an intermediate carrier that carries a toner image transferred from an image carrier and conveys the toner image to the step of transferring to the image carrier. It is about the method.
【０００２】[0002]
【従来の技術】カラー画像形成装置では、減法混色の３
原色の各トナー像を記録紙上に重ねて形成する必要があ
る。このような画像形成装置の一例として、従来、ジャ
ムなどのコピー動作中断後の次のコピー動作開始前に中
間担持体としての中間転写ベルトのクリーニングを数回
行う発明が特開昭63−216084号公報に示されている。2. Description of the Related Art In a color image forming apparatus, a subtractive color mixture
It is necessary to form the primary color toner images on the recording paper in an overlapping manner. As an example of such an image forming apparatus, there is conventionally an invention in which the intermediate transfer belt as an intermediate carrier is cleaned several times before the next copying operation is started after the copying operation such as jam is interrupted. It is shown in the official gazette.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、この方
法では中間転写ベルト上の未転写トナーの全てを中間転
写ベルトに設けたクリーニング手段によって除去するた
め、該クリーニング手段に加わる負荷が大きくなってし
まうという欠点があった。However, in this method, since all the untransferred toner on the intermediate transfer belt is removed by the cleaning means provided on the intermediate transfer belt, the load applied to the cleaning means becomes large. There was a flaw.
【０００４】この発明は、前記に鑑み、中間担持体のク
リーニング手段への負荷を減少させ、長期間にわたり安
定したクリーニング性能を維持することができる画像形
成方法を提供することを目的とする。In view of the above, it is an object of the present invention to provide an image forming method capable of reducing the load on the cleaning means of the intermediate carrier and maintaining stable cleaning performance for a long period of time.
【０００５】[0005]
【課題を解決するための手段】前記目的を達成するた
め、請求項１の発明は、静電潜像を顕像化したトナー像
を担持する像担持体と、この像担持体上のトナー像を中
間担持体上に転移させる第１転移手段と、前記像担持体
上の残留トナーを除去する第１クリーニング手段と、前
記中間担持体上のトナー像を転写紙に転移させる第２転
移手段と、前記中間担持体上の残留トナーを除去する該
中間担持体に接離可能な第２クリーニング手段とを有
し、前記中間担持体上のトナー像が転写紙上に転移せ
ず、中間担持体上に未転移トナーが発生した場合に、第
２クリーニング手段を解除して中間担持体から離間し、
第３転移手段により中間担持体上の未転移トナー像を像
担持体上に転移させることを特徴とする。請求項２の発
明は、請求項１において、第１転移手段と第３転移手段
が共通なバイアスローラであり、このバイアスローラに
印加するバイアス電位の大きさ及び極性が可変であるこ
とを特徴とする。請求項３の発明は、請求項１におい
て、第１転移手段と第３転移手段が共通なコロナチャー
ジャーであり、このコロナチャージャーに印加するバイ
アス電位の大きさ及び極性が可変であることを特徴とす
る。In order to achieve the above-mentioned object, the invention of claim 1 is an image carrier for carrying a toner image in which an electrostatic latent image is visualized, and a toner image on the image carrier. First transfer means for transferring the toner on the intermediate carrier, first cleaning means for removing the residual toner on the image carrier, and second transfer means for transferring the toner image on the intermediate carrier to the transfer paper. A second cleaning unit that is capable of contacting and separating from the intermediate carrier to remove the residual toner on the intermediate carrier, and the toner image on the intermediate carrier does not transfer onto the transfer paper. When the untransferred toner is generated in the second transfer device, the second cleaning unit is released to separate from the intermediate carrier,
The third transfer means transfers the untransferred toner image on the intermediate carrier onto the image carrier. According to a second aspect of the present invention, in the first aspect, the first transfer means and the third transfer means are common bias rollers, and the magnitude and polarity of the bias potential applied to the bias rollers are variable. To do. According to a third aspect of the present invention, in the first aspect, the first transfer means and the third transfer means are common corona chargers, and the magnitude and polarity of the bias potential applied to the corona chargers are variable. To do.
【０００６】また、請求項４の発明は、請求項１におい
て、第３転移手段が像担持体表面を中間担持体上のトナ
ーの帯電極性に対して逆極性に帯電させることを特徴と
する。請求項５の発明は、請求項１において、第２転移
手段がバイアス電位を印加可能な転写バイアスローラで
あり、中間担持体上のトナー像が転写紙上に転写せず、
直接に転写バイアスローラに接触するときに、中間担持
体上のトナー像を転写紙上に転移させるときよりも、バ
イアス電位及び接触圧力を減少させることを特徴とす
る。請求項６の発明は、請求項５において、転写バイア
スローラに付着したトナーを除去する第３クリーニング
手段を有し、この第３クリーニング手段が弾性部材から
なるクリーニングブレードであることを特徴とする。請
求項７の発明は請求項１ないし６のいずれかにおいて、
第２転移手段がバイアス電位を印加可能な転写バイアス
ローラであり、中間担持体上のトナー像が転写紙上に転
写せず、直接に転写バイアスローラに接触するときに、
前記トナー像の帯電電位と逆極性のバイアス電位を印加
して転写バイアスローラ表面にトナーを保持し、中間担
持体の画像領域終了後に転写バイアスローラ表面上のト
ナーの帯電極性と同極性のバイアス電位を印加して中間
持体上にトナーを再付着させることを特徴とする。Further, the invention of claim 4 is characterized in that, in claim 1, the third transfer means charges the surface of the image carrier to a polarity opposite to the charging polarity of the toner on the intermediate carrier. According to a fifth aspect of the present invention, in the first aspect, the second transfer means is a transfer bias roller capable of applying a bias potential, and the toner image on the intermediate carrier is not transferred onto the transfer paper.
It is characterized in that the bias potential and the contact pressure are reduced when the toner directly contacts the transfer bias roller, compared with when the toner image on the intermediate carrier is transferred onto the transfer paper. According to a sixth aspect of the invention, in the fifth aspect, there is provided a third cleaning means for removing the toner attached to the transfer bias roller, and the third cleaning means is a cleaning blade made of an elastic member. The invention of claim 7 is based on any one of claims 1 to 6,
The second transfer means is a transfer bias roller capable of applying a bias potential, and when the toner image on the intermediate carrier does not transfer onto the transfer paper but directly contacts the transfer bias roller,
A bias potential having a polarity opposite to the charge potential of the toner image is applied to hold the toner on the surface of the transfer bias roller, and after the end of the image area of the intermediate carrier, a bias potential having the same polarity as the charge polarity of the toner on the surface of the transfer bias roller. Is applied to redeposit the toner on the intermediate holding member.
【０００７】[0007]
【作用】前記のように中間担持体上のトナー像が転写紙
上に転移せず、中間担持体上に未転移トナーが発生した
場合に、第２クリーニング手段を解除して中間担持体か
ら離間し、第３転移手段により中間担持体上の未転移ト
ナー像を像担持体上に転移させるか、又は第３転移手段
としての転写バイアスローラの表面に転移させるので、
中間担持体の第２クリーニング手段への入力トナー量が
減少する。As described above, when the toner image on the intermediate carrier does not transfer onto the transfer paper and untransferred toner is generated on the intermediate carrier, the second cleaning means is released to separate the intermediate carrier from the intermediate carrier. Since the untransferred toner image on the intermediate carrier is transferred onto the image carrier by the third transfer means or transferred onto the surface of the transfer bias roller as the third transfer means,
The amount of toner input to the second cleaning means of the intermediate carrier is reduced.
【０００８】[0008]
【実施例】図１は中間担持体を中間転写ベルトとしたこ
の発明の一実施例を示すカラー複写装置における感光体
及び中間転写ベルト回りの拡大図である。１は図におい
て矢印のように反時計方向に回転する感光体で、この感
光体１の回りには感光体クリーニングユニット（クリー
ニング前除電器を含む）２、除電ランプ３、帯電器４、
電位センサ５、ブラック現像器６、シアン現像器７、マ
ゼンダ現像器８、イエロー現像器９、中間転写ベルト10
などが配置されている。各現像器６，７，８，９は、静
電潜像を現像するために現像剤を感光体１に対向させる
よう回転する現像スリーブ11，12，13，14と、現像剤を
汲み上げ撹拌するために回転する現像パドル及び現像剤
のトナー濃度検知センサなどで構成されている。15は感
光体クリーニングユニット２のゴムブレードである。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an enlarged view around a photoconductor and an intermediate transfer belt in a color copying apparatus showing an embodiment of the present invention in which an intermediate carrier is an intermediate transfer belt. Reference numeral 1 denotes a photoconductor that rotates counterclockwise as indicated by an arrow in the figure. Around the photoconductor 1, a photoconductor cleaning unit (including a pre-cleaning static eliminator) 2, a static erasing lamp 3, a charger 4,
Potential sensor 5, black developing device 6, cyan developing device 7, magenta developing device 8, yellow developing device 9, intermediate transfer belt 10
Are arranged. Each of the developing units 6, 7, 8 and 9 draws up and stirs the developing sleeves 11, 12, 13 and 14 which rotate so that the developer faces the photoconductor 1 in order to develop the electrostatic latent image. Therefore, it is composed of a developing paddle that rotates and a toner concentration detection sensor for the developer. Reference numeral 15 is a rubber blade of the photoconductor cleaning unit 2.
【０００９】中間転写ベルト10は、駆動ローラ16、ベル
ト転写バイアスローラ17、及び従動ローラ18群により張
架されており、図示しない駆動モータにより駆動される
ようになっている。20はベルトクリーニングユニット
で、ブラシローラ21、ゴムブレード22、及び該ブレード
をベルト10に対して接離させる接離機構23などで構成さ
れており、１色目のブラック画像をベルト転写した後
の、２，３，４色目をベルト転写している間は、接離機
構23によってベルト10面から離間させられる。25は紙転
写ユニットで、紙転写バイアスローラ26、ローラクリー
ニングブレード27、及び該ブレードをベルト10に対して
接離させる接離機構28などで構成されている。紙転写バ
イアスローラ26は、通常はベルト10面から離間している
が、ベルト10面に形成された４色の重ね画像を転写紙に
一括転写するときにタイミングを取って接離機構28で押
圧され、所定のバイアス電圧が印加されることにより紙
への転写を行う。尚、転写紙は図示しない給紙ローラ、
レジストローラによって、中間転写ベルト10面の４色重
ね画像の先端部が紙転写位置に到達するタイミングに合
わせて給紙される。The intermediate transfer belt 10 is stretched around a drive roller 16, a belt transfer bias roller 17, and a group of driven rollers 18, and is driven by a drive motor (not shown). Reference numeral 20 denotes a belt cleaning unit, which is composed of a brush roller 21, a rubber blade 22, and a contact / separation mechanism 23 for contacting / separating the blade with respect to the belt 10, and the like. While the second, third, and fourth colors are being transferred on the belt, they are separated from the surface of the belt 10 by the contact / separation mechanism 23. A paper transfer unit 25 is composed of a paper transfer bias roller 26, a roller cleaning blade 27, and a contact / separation mechanism 28 for contacting / separating the blade with respect to the belt 10. The paper transfer bias roller 26 is normally separated from the surface of the belt 10, but is pressed by the contact / separation mechanism 28 at a timing when the four-color superposed images formed on the surface of the belt 10 are collectively transferred to the transfer paper. Then, the transfer to the paper is performed by applying a predetermined bias voltage. The transfer paper is a paper feed roller (not shown),
The registration rollers feed the four-color superimposed image on the surface of the intermediate transfer belt 10 at the timing when the leading edge of the four-color superimposed image reaches the paper transfer position.
【００１０】中間転写ベルト10の動き方は、１色目のブ
ラックトナー像のベルト転写が後端部まで終了した後の
動作方式として、一定速往動方式、スキップ往動方式、
及び往復動（クイックリターン）方式が考えられるが、
この中の１方式か、又はコピーサイズに応じて（コピー
速度面などで）効率的な方式の組み合わせによって動作
させる。The moving method of the intermediate transfer belt 10 is a constant speed forward movement method, a skip forward movement method, as an operation method after the belt transfer of the black toner image of the first color is completed up to the rear end portion.
And a reciprocating (quick return) method is possible,
One of these methods is used, or a combination of efficient methods (in terms of copy speed, etc.) is used according to the copy size.
【００１１】次に、前記の作用を説明する。図１に示す
ようなカラー複写装置において、転写紙のジャムなどに
より中間転写ベルト10上に未転写トナーが発生した場
合、図２に示すようにベルトクリーニングユニット20の
ゴムブレード22を解除して該ベルト10面から離間し、未
転写トナーをベルト転写部まで搬送する。ベルト転写部
では、ベルト転写バイアスローラ17に通常のベルト転写
のときとは逆極性のバイアス電位、すなわち、ベルト10
上の帯電極性と同極性のバイアスを印加することによっ
て、ベルト10上の未転写トナーを感光体１の表面に転移
させる。そして、この感光体１の表面に転移された未転
写トナーは感光体クリーニングユニット２のゴムブレー
ド15によって回収される。未転写トナーの画像領域が通
過した後、ベルトクリーニングユニット20のゴムブレー
ド22をベルト10面に当接させ、感光体１に転移されずに
ベルト10上に残留したトナーを回収する。したがって、
ゴムブレード22に入力されるトナー量は減少する。Next, the above operation will be described. In the color copying apparatus as shown in FIG. 1, when untransferred toner is generated on the intermediate transfer belt 10 due to a jam of transfer paper, the rubber blade 22 of the belt cleaning unit 20 is released as shown in FIG. Separated from the surface of the belt 10, the untransferred toner is conveyed to the belt transfer unit. In the belt transfer section, the bias potential of the polarity opposite to that of the normal belt transfer is applied to the belt transfer bias roller 17, that is, the belt 10
By applying a bias having the same polarity as the above charging polarity, the untransferred toner on the belt 10 is transferred to the surface of the photoconductor 1. Then, the untransferred toner transferred to the surface of the photoconductor 1 is collected by the rubber blade 15 of the photoconductor cleaning unit 2. After the image area of the untransferred toner has passed, the rubber blade 22 of the belt cleaning unit 20 is brought into contact with the surface of the belt 10 to collect the toner remaining on the belt 10 without being transferred to the photoconductor 1. Therefore,
The amount of toner input to the rubber blade 22 decreases.
【００１２】図３は別の実施例を示す。この実施例はベ
ルト転写手段として放電極性が可変なコロナチャージャ
ー30を用いたものである。この場合も前記と同様に、感
光体１の表面に転移された未転写トナーは感光体クリー
ニングユニット２のゴムブレード15によって回収され、
感光体１に転移されずにベルト10上に残留したトナーは
未転写トナーの画像領域が通過した後、ベルトクリーニ
ングユニット20のゴムブレード22によって回収されるこ
とになる。FIG. 3 shows another embodiment. In this embodiment, a corona charger 30 having a variable discharge polarity is used as the belt transfer means. Also in this case, similarly to the above, the untransferred toner transferred to the surface of the photoconductor 1 is collected by the rubber blade 15 of the photoconductor cleaning unit 2,
The toner remaining on the belt 10 without being transferred to the photoreceptor 1 is collected by the rubber blade 22 of the belt cleaning unit 20 after the image area of the untransferred toner has passed.
【００１３】図４はさらに別の実施例を示す。この実施
例では帯電器４を用いて感光体１をトナーの帯電極性と
逆極性に帯電させることにより、ベルト10上のトナーを
感光体１に転移させている。FIG. 4 shows another embodiment. In this embodiment, the toner on the belt 10 is transferred to the photoconductor 1 by charging the photoconductor 1 to the opposite polarity to the charging polarity of the toner by using the charger 4.
【００１４】図５（Ａ），（Ｂ）はさらにまた別の実施
例を示す。この実施例においてベルト10上に未転写トナ
ーが発生した場合、紙転写バイアスローラ26を直接、ベ
ルト10に当接させる。このとき、紙転写バイアスローラ
26に印加するバイアス電位を通常の紙転写時よりも小さ
くする。これは、紙転写バイアスローラ26からトナーへ
の電化注入によるベルト10への再付着を防止するためで
ある。また、紙転写バイアスローラ26の当接圧力をほぼ
ゼロにして、ローラ26とベルト10の圧力でトナーが固着
してしまうことを防止する。前記によりベルト10上の未
転写トナーは紙転写バイアスローラ26へ分配され（未転
写トナーの一部がローラ26に表面に転写され）、ゴムブ
レード22に入力されるトナー量が減少し、確実にクリー
ニングすることが可能となる。FIGS. 5A and 5B show still another embodiment. In this embodiment, when the untransferred toner is generated on the belt 10, the paper transfer bias roller 26 is directly brought into contact with the belt 10. At this time, the paper transfer bias roller
Make the bias potential applied to 26 smaller than that during normal paper transfer. This is to prevent reattachment to the belt 10 due to electrification injection from the paper transfer bias roller 26 to the toner. Further, the contact pressure of the paper transfer bias roller 26 is made substantially zero to prevent the toner from being fixed by the pressure of the roller 26 and the belt 10. Due to the above, the untransferred toner on the belt 10 is distributed to the paper transfer bias roller 26 (a part of the untransferred toner is transferred to the surface of the roller 26), and the amount of toner input to the rubber blade 22 is reduced, and it is ensured. It becomes possible to clean.
【００１５】この際、紙転写バイアスローラ26のローラ
クリーニングブレード27を解除しておけば、ローラ26に
付着したトナーは、ローラ26のバイアス電位によってロ
ーラ26上に保持される。ここで、ローラ26とベルト10の
接触圧力がほぼゼロであるため、ローラ26上のトナーの
凝集や固着を防止できる。At this time, if the roller cleaning blade 27 of the paper transfer bias roller 26 is released, the toner attached to the roller 26 is held on the roller 26 by the bias potential of the roller 26. Here, since the contact pressure between the roller 26 and the belt 10 is almost zero, the toner on the roller 26 can be prevented from aggregating and sticking.
【００１６】未転写トナーによる画像領域が通過した時
点で、紙転写バイアスローラ26に印加するバイアス電位
を逆極性、すなわちトナーの帯電極性と同極性に切り換
える。これによってバイアスローラ26上に保持していた
トナーが再びベルト10上に転移する。このトナーをベル
トクリーニングユニット20のゴムブレード22によって回
収する。When the image area of untransferred toner has passed, the bias potential applied to the paper transfer bias roller 26 is switched to the opposite polarity, that is, the same polarity as the charging polarity of the toner. As a result, the toner held on the bias roller 26 is transferred onto the belt 10 again. The toner is collected by the rubber blade 22 of the belt cleaning unit 20.
【００１７】[0017]
【発明の効果】以上のように請求項１ないし７の発明で
は、中間転写ベルトのような中間担持体上の未転移トナ
ーを像担持体や第２転移手段としての転写バイアスロー
ラの表面に転移させて像担持体用の第１クリーニング手
段や転写バイアスローラの第３クリーニング手段に分配
して回収させるため、中間担持体の第２クリーニング手
段にかかる負荷を低減させ、長期間にわたって安定した
クリーニング性能を維持することができる。As described above, in the inventions of claims 1 to 7, the untransferred toner on the intermediate carrier such as the intermediate transfer belt is transferred to the surface of the image carrier or the transfer bias roller as the second transfer means. Then, the first cleaning means for the image carrier and the third cleaning means for the transfer bias roller are distributed and collected, so that the load on the second cleaning means for the intermediate carrier is reduced and the cleaning performance is stable for a long period of time. Can be maintained.
【図１】この発明の一実施例を示すカラー複写装置にお
ける感光体及び中間転写ベルト回りの拡大図である。FIG. 1 is an enlarged view around a photoconductor and an intermediate transfer belt in a color copying apparatus showing an embodiment of the present invention.
【図２】同上の感光体と中間転写ベルトの部分拡大図で
ある。FIG. 2 is a partially enlarged view of the above-mentioned photoreceptor and intermediate transfer belt.
【図３】別の実施例の感光体と中間転写ベルトの部分拡
大図である。FIG. 3 is a partially enlarged view of a photoconductor and an intermediate transfer belt according to another embodiment.
【図４】さらに別の実施例の感光体と中間転写ベルトの
部分拡大図である。FIG. 4 is a partially enlarged view of a photoconductor and an intermediate transfer belt of still another embodiment.
【図５】さらにまた別の実施例の感光体と中間転写ベル
トの部分拡大図で、（Ａ），（Ｂ）はその作用を示すも
のである。FIG. 5 is a partially enlarged view of a photoconductor and an intermediate transfer belt of still another embodiment, and (A) and (B) show the operation.
１ 感光体 ２ 感光体クリーニングユニット ３ 除電ランプ ４ 帯電器 10 中間転写ベルト 15 ゴムブレード 17 ベルト転写バイアスローラ 22 ゴムブレード 26 紙転写バイアスローラ 27 ローラクリーニングブレード 1 photoconductor 2 photoconductor cleaning unit 3 static elimination lamp 4 charger 10 intermediate transfer belt 15 rubber blade 17 belt transfer bias roller 22 rubber blade 26 paper transfer bias roller 27 roller cleaning blade
───────────────────────────────────────────────────── フロントページの続き (72)発明者 ▲ゆう▼ 英雄 東京都大田区中馬込１丁目３番６号 株式 会社リコー内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor ▲ Yu ▼ Hideo 1-3-6 Nakamagome, Ota-ku, Tokyo Within Ricoh Co., Ltd.
Claims (7)
る像担持体と、この像担持体上のトナー像を中間担持体
上に転移させる第１転移手段と、前記像担持体上の残留
トナーを除去する第１クリーニング手段と、前記中間担
持体上のトナー像を転写紙に転移させる第２転移手段
と、前記中間担持体上の残留トナーを除去する該中間担
持体に接離可能な第２クリーニング手段とを有し、前記
中間担持体上のトナー像が転写紙上に転移せず、中間担
持体上に未転移トナーが発生した場合に、第２クリーニ
ング手段を解除して中間担持体から離間し、第３転移手
段により中間担持体上の未転移トナー像を像担持体上に
転移させることを特徴とする画像形成方法。1. An image carrier that carries a toner image that visualizes an electrostatic latent image, first transfer means that transfers the toner image on the image carrier onto an intermediate carrier, and the image carrier. The first cleaning unit for removing the residual toner on the upper side, the second transfer unit for transferring the toner image on the intermediate carrier to the transfer paper, and the intermediate carrier for removing the residual toner on the intermediate carrier. When the toner image on the intermediate carrier does not transfer to the transfer paper and the untransferred toner is generated on the intermediate carrier, the second cleaning unit is released. An image forming method characterized in that the untransferred toner image on the intermediate carrier is transferred to the image carrier by a third transfer means, which is separated from the intermediate carrier.
転移手段が共通なバイアスローラであり、このバイアス
ローラに印加するバイアス電位の大きさ及び極性が可変
であることを特徴とする画像形成方法。2. The first transfer means and the third transfer means according to claim 1.
An image forming method characterized in that the transfer means is a common bias roller, and the magnitude and polarity of the bias potential applied to the bias roller are variable.
転移手段が共通なコロナチャージャーであり、このコロ
ナチャージャーに印加するバイアス電位の大きさ及び極
性が可変であることを特徴とする画像形成方法。3. The first transfer means and the third transfer means according to claim 1.
An image forming method characterized in that the transfer means is a common corona charger, and the magnitude and polarity of the bias potential applied to the corona charger are variable.
持体表面を中間担持体上のトナーの帯電極性に対して逆
極性に帯電させることを特徴とする画像形成方法。4. The image forming method according to claim 1, wherein the third transfer means charges the surface of the image carrier to the opposite polarity to the charge polarity of the toner on the intermediate carrier.
アス電位を印加可能な転写バイアスローラであり、中間
担持体上のトナー像が転写紙上に転写せず、直接に転写
バイアスローラに接触するときに、中間担持体上のトナ
ー像を転写紙上に転移させるときよりも、バイアス電位
及び接触圧力を減少させることを特徴とする画像形成方
法。5. The transfer bias roller according to claim 1, wherein the second transfer means is a transfer bias roller capable of applying a bias potential, and the toner image on the intermediate carrier does not transfer onto the transfer paper but directly contacts the transfer bias roller. Sometimes, the bias potential and the contact pressure are reduced as compared with the case of transferring the toner image on the intermediate carrier onto the transfer paper.
に付着したトナーを除去する第３クリーニング手段を有
し、この第３クリーニング手段が弾性部材からなるクリ
ーニングブレードであることを特徴とする画像形成方
法。6. The image forming method according to claim 5, further comprising a third cleaning unit for removing toner attached to the transfer bias roller, the third cleaning unit being a cleaning blade made of an elastic member. ..
第２転移手段がバイアス電位を印加可能な転写バイアス
ローラであり、中間担持体上のトナー像が転写紙上に転
写せず、直接に転写バイアスローラに接触するときに、
前記トナー像の帯電電位と逆極性のバイアス電位を印加
して転写バイアスローラ表面にトナーを保持し、中間担
持体の画像領域終了後に転写バイアスローラ表面上のト
ナーの帯電極性と同極性のバイアス電位を印加して中間
持体上にトナーを再付着させることを特徴とする画像形
成方法。7. The method according to any one of claims 1 to 6,
The second transfer means is a transfer bias roller capable of applying a bias potential, and when the toner image on the intermediate carrier does not transfer onto the transfer paper but directly contacts the transfer bias roller,
A bias potential having a polarity opposite to the charge potential of the toner image is applied to hold the toner on the surface of the transfer bias roller, and after the end of the image area of the intermediate carrier, a bias potential having the same polarity as the charge polarity of the toner on the surface of the transfer bias roller. Is applied to re-adhere the toner on the intermediate holding member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10077092A JP3193113B2 (en) | 1992-04-21 | 1992-04-21 | Image forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10077092A JP3193113B2 (en) | 1992-04-21 | 1992-04-21 | Image forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05297739A true JPH05297739A (en) | 1993-11-12 |
| JP3193113B2 JP3193113B2 (en) | 2001-07-30 |
Family
ID=14282728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10077092A Expired - Fee Related JP3193113B2 (en) | 1992-04-21 | 1992-04-21 | Image forming method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3193113B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0876539A (en) * | 1994-09-07 | 1996-03-22 | Ricoh Co Ltd | Color image forming device and color image forming method |
| EP0738938A1 (en) * | 1995-04-21 | 1996-10-23 | Canon Kabushiki Kaisha | Image forming apparatus using intermediate transfer member |
| EP0744672A1 (en) * | 1995-05-23 | 1996-11-27 | Canon Kabushiki Kaisha | Image forming apparatus employing intermediate transfer member |
| US5752130A (en) * | 1995-07-07 | 1998-05-12 | Canon Kabushiki Kaisha | Image forming apparatus for cleaning residual toner from an intermediate transfer member |
| US5923939A (en) * | 1996-01-10 | 1999-07-13 | Canon Kabushiki Kaisha | Image forming apparatus employing intermediary transfer member |
| US5950058A (en) * | 1997-02-21 | 1999-09-07 | Canon Kabushiki Kaisha | Image forming apparatus |
| JPH11258919A (en) * | 1998-03-11 | 1999-09-24 | Toshiba Corp | Image forming device |
| US5966564A (en) * | 1997-02-27 | 1999-10-12 | Ricoh Company, Ltd. | Image forming apparatus and method with cleaning features |
| US6205317B1 (en) * | 1999-04-08 | 2001-03-20 | Samsung Electronics Co., Ltd. | Method of cleaning ink remaining on photoreceptor web when error occurs in printer |
| US6278858B1 (en) | 1997-05-20 | 2001-08-21 | Canon Kabushiki Kaisha | Image forming apparatus having an intermediate transfer member and method of forming an image using the intermediate transfer member |
| JP2002229413A (en) * | 2001-01-30 | 2002-08-14 | Canon Inc | Image forming unit and image forming device |
| JP2003114580A (en) * | 2002-09-27 | 2003-04-18 | Ricoh Co Ltd | Color image forming device and color image forming method |
| JP2006146189A (en) * | 2004-10-20 | 2006-06-08 | Canon Inc | Image forming apparatus |
| US7398032B2 (en) | 2004-12-13 | 2008-07-08 | Canon Kabushiki Kaisha | Image forming apparatus featuring first and second cleaners operable on the basis of an interval of an image forming process during a continuous image forming process |
| JP2008268767A (en) * | 2007-04-24 | 2008-11-06 | Kyocera Mita Corp | Image forming apparatus, control method for image forming apparatus, program, and recording medium |
| US7567765B2 (en) | 2006-04-14 | 2009-07-28 | Seiko Epson Corporation | Image forming apparatus |
| US7627261B2 (en) * | 2004-09-13 | 2009-12-01 | Kabushiki Kaisha Toshiba | Image forming apparatus and image forming method having control of cleaning depending on number of transferred images |
-
1992
- 1992-04-21 JP JP10077092A patent/JP3193113B2/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0876539A (en) * | 1994-09-07 | 1996-03-22 | Ricoh Co Ltd | Color image forming device and color image forming method |
| EP0738938A1 (en) * | 1995-04-21 | 1996-10-23 | Canon Kabushiki Kaisha | Image forming apparatus using intermediate transfer member |
| US5732310A (en) * | 1995-04-21 | 1998-03-24 | Canon Kabushiki Kaisha | Image forming apparatus having cleaning device for cleaning intermediate transfer member |
| US5809373A (en) * | 1995-05-23 | 1998-09-15 | Canon Kabushiki Kaisha | Image forming apparatus which back-transfers residual toner from an intermediate transfer member to a photosensitive drum |
| EP0744672A1 (en) * | 1995-05-23 | 1996-11-27 | Canon Kabushiki Kaisha | Image forming apparatus employing intermediate transfer member |
| US5991566A (en) * | 1995-07-07 | 1999-11-23 | Canon Kabushiki Kaisha | Image forming method with surface potential control of intermediate transfer member |
| US5752130A (en) * | 1995-07-07 | 1998-05-12 | Canon Kabushiki Kaisha | Image forming apparatus for cleaning residual toner from an intermediate transfer member |
| US5923939A (en) * | 1996-01-10 | 1999-07-13 | Canon Kabushiki Kaisha | Image forming apparatus employing intermediary transfer member |
| US5950058A (en) * | 1997-02-21 | 1999-09-07 | Canon Kabushiki Kaisha | Image forming apparatus |
| US5966564A (en) * | 1997-02-27 | 1999-10-12 | Ricoh Company, Ltd. | Image forming apparatus and method with cleaning features |
| US6278858B1 (en) | 1997-05-20 | 2001-08-21 | Canon Kabushiki Kaisha | Image forming apparatus having an intermediate transfer member and method of forming an image using the intermediate transfer member |
| JPH11258919A (en) * | 1998-03-11 | 1999-09-24 | Toshiba Corp | Image forming device |
| US6205317B1 (en) * | 1999-04-08 | 2001-03-20 | Samsung Electronics Co., Ltd. | Method of cleaning ink remaining on photoreceptor web when error occurs in printer |
| JP2002229413A (en) * | 2001-01-30 | 2002-08-14 | Canon Inc | Image forming unit and image forming device |
| JP2003114580A (en) * | 2002-09-27 | 2003-04-18 | Ricoh Co Ltd | Color image forming device and color image forming method |
| US7627261B2 (en) * | 2004-09-13 | 2009-12-01 | Kabushiki Kaisha Toshiba | Image forming apparatus and image forming method having control of cleaning depending on number of transferred images |
| JP2006146189A (en) * | 2004-10-20 | 2006-06-08 | Canon Inc | Image forming apparatus |
| US7398032B2 (en) | 2004-12-13 | 2008-07-08 | Canon Kabushiki Kaisha | Image forming apparatus featuring first and second cleaners operable on the basis of an interval of an image forming process during a continuous image forming process |
| US7567765B2 (en) | 2006-04-14 | 2009-07-28 | Seiko Epson Corporation | Image forming apparatus |
| JP2008268767A (en) * | 2007-04-24 | 2008-11-06 | Kyocera Mita Corp | Image forming apparatus, control method for image forming apparatus, program, and recording medium |
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