JP2020134865A5

JP2020134865A5 -

Info

Publication number: JP2020134865A5
Application number: JP2019031567A
Authority: JP
Filing date: 2019-02-25
Publication date: 2022-03-02
Anticipated expiration: 2039-02-25

Description

（１）感光体と、前記感光体の表面に正規極性のトナーを供給する現像器と、前記感光体の表面に供給された前記トナーを転写する第１転写手段と、前記第１転写手段に前記正規極性とは逆の極性である逆極性の転写電圧を印加する第１の印加手段と、前記第１転写手段に前記逆極性の転写電圧を印加して前記正規極性のトナーの転写を行った後に前記感光体の表面に残留したトナーをクリーニングするために前記感光体の表面に当接して当接部を形成するブレードと、を有する複数の画像形成ステーションと、複数の前記感光体の表面と当接し、前記複数の感光体の表面に形成されたトナーが転写される中間転写体と、前記中間転写体と当接して転写部を形成し前記転写部において転写されたトナーを記録材に転写する第２転写手段と、を備え、所定の画像形成ステーションの前記当接部に前記正規極性のトナーを供給するための供給動作を実行することが可能な画像形成装置であって、前記中間転写体の移動方向において前記転写部よりも上流側で前記所定の画像形成ステーションよりも下流側に隣接する画像形成ステーションの前記第１転写手段に前記正規極性の転写電圧を印加する第２の印加手段と、前記第１の印加手段と前記第２の印加手段と、を制御する制御部と、を備え、前記制御部は、前記供給動作を実行する際には、前記所定の画像形成ステーションの前記第１転写手段に前記転写電圧を印加せず、前記下流側に隣接する画像形成ステーションの前記第１転写手段に、前記第２の印加手段により前記正規極性の転写電圧を印加するように制御することを特徴とする画像形成装置。
（２）感光体と、前記感光体の表面に正規極性のトナーを供給する現像器と、前記感光体の表面に供給された前記トナーを転写する第１転写手段と、前記第１転写手段に前記正規極性とは逆の極性である逆極性の転写電圧を印加する第１の印加手段と、前記第１転写手段に前記逆極性の転写電圧を印加して前記正規極性のトナーの転写を行った後に前記感光体の表面に残留したトナーをクリーニングするために前記感光体の表面に当接して当接部を形成するブレードと、を有する複数の画像形成ステーションと、複数の前記感光体の表面と当接し、前記複数の感光体の表面に形成されたトナーが転写される中間転写体と、前記中間転写体と当接して転写部を形成し前記転写部において転写されたトナーを記録材に転写する第２転写手段と、を備え、所定の画像形成ステーションの前記当接部に前記正規極性のトナーを供給するための供給動作を実行することが可能な画像形成装置であって、前記中間転写体の移動方向において前記転写部よりも下流側で前記所定の画像形成ステーションよりも上流側に隣接する画像形成ステーションの前記第１転写手段に前記正規極性の転写電圧を印加する第２の印加手段と、前記第１の印加手段と前記第２の印加手段と、を制御する制御部と、を備え、前記制御部は、前記供給動作を実行する際には、前記所定の画像形成ステーションの前記第１転写手段に前記転写電圧を印加せず、前記上流側に隣接する画像形成ステーションの前記第１転写手段に、前記第２の印加手段により前記正規極性の転写電圧を印加するように制御することを特徴とする画像形成装置。 (1) A photoconductor, a developer that supplies toner of normal polarity to the surface of the photoconductor, a first transfer means that transfers the toner supplied to the surface of the photoconductor, and the first transfer means . A first application means for applying a transfer voltage having a polarity opposite to the normal polarity to the transfer means, and a toner having the normal polarity by applying a transfer voltage having the opposite polarity to the first transfer means. A plurality of image forming stations having a blade that abuts on the surface of the photoconductor to form a contact portion in order to clean the toner remaining on the surface of the photoconductor after performing the transfer. An intermediate transfer body that comes into contact with the surface of the photoconductor and is transferred with toner formed on the surfaces of the plurality of photoconductors, and an intermediate transfer body that abuts on the intermediate transfer body to form a transfer portion and is transferred at the transfer portion. A second transfer means for transferring the transferred toner to a recording material is provided, and it is possible to perform a supply operation for supplying the toner of the normal polarity to the contact portion of a predetermined image forming station. An image forming apparatus having the normal polarity on the first transfer means of an image forming station adjacent to the image forming station on the upstream side of the transfer portion and downstream of the predetermined image forming station in the moving direction of the intermediate transfer body . A second application means for applying a transfer voltage , and a control unit for controlling the first application means and the second application means are provided, and the control unit is used when executing the supply operation. Does not apply the transfer voltage to the first transfer means of the predetermined image forming station , but instead applies the normal polarity to the first transfer means of the image forming station adjacent to the downstream side by the second application means. An image forming apparatus characterized in that the transfer voltage of the toner is controlled to be applied.
(2) To the photoconductor, a developer that supplies toner of normal polarity to the surface of the photoconductor, a first transfer means that transfers the toner supplied to the surface of the photoconductor, and the first transfer means. The transfer voltage of the reverse polarity is applied to the first application means for applying the transfer voltage having the opposite polarity to the normal polarity, and the transfer voltage of the reverse polarity is applied to the first transfer means to transfer the toner of the normal polarity. After that, a plurality of image forming stations having a blade that abuts on the surface of the photoconductor to form an abutting portion in order to clean the toner remaining on the surface of the photoconductor, and a plurality of surfaces of the photoconductor. The intermediate transfer body to which the toner formed on the surface of the plurality of photoconductors is transferred, and the toner transferred to the transfer portion by contacting the intermediate transfer body to form a transfer portion are used as recording materials. An image forming apparatus comprising a second transfer means for transferring, capable of performing a supply operation for supplying the toner having the normal polarity to the abutting portion of a predetermined image forming station, wherein the intermediate is provided. A second application in which the normal polarity transfer voltage is applied to the first transfer means of the image forming station adjacent to the image forming station on the downstream side of the transfer portion and upstream of the predetermined image forming station in the moving direction of the transfer body. A control unit for controlling the first application means and the second application means is provided, and the control unit is of the predetermined image forming station when the supply operation is executed. Controlled so that the transfer voltage is not applied to the first transfer means, but the transfer voltage of the normal polarity is applied to the first transfer means of the image forming station adjacent to the upstream side by the second application means. An image forming apparatus characterized in that it does.

Claims

To the photoconductor, a developer that supplies toner of normal polarity to the surface of the photoconductor, a first transfer means that transfers the toner supplied to the surface of the photoconductor, and the first transfer means. A first application means for applying a transfer voltage having a polarity opposite to that of the normal polarity, and a transfer voltage of the reverse polarity applied to the first transfer means to transfer the toner of the normal polarity. A plurality of image forming stations having a blade that abuts on the surface of the photoconductor to form a contact portion in order to clean the toner remaining on the surface of the photoconductor.
An intermediate transfer body that comes into contact with the surfaces of the plurality of photoconductors and to which the toner formed on the surfaces of the plurality of photoconductors is transferred,
A second transfer means that abuts on the intermediate transfer body to form a transfer portion and transfers the toner transferred in the transfer portion to the recording material.
Equipped with
An image forming apparatus capable of performing a supply operation for supplying the toner having the normal polarity to the contact portion of a predetermined image forming station.
A second transfer voltage having the normal polarity is applied to the first transfer means of the image forming station adjacent to the image forming station on the upstream side of the transfer portion and downstream of the predetermined image forming station in the moving direction of the intermediate transfer body . And the application means of
A control unit that controls the first application means and the second application means,
Equipped with
When the control unit executes the supply operation, the control unit
The transfer voltage was not applied to the first transfer means of the predetermined image forming station , and the transfer voltage was not applied.
An image forming apparatus, characterized in that the first transfer means of an image forming station adjacent to the downstream side is controlled to apply a transfer voltage having the normal polarity by the second applying means.

Claim 1 is characterized in that the control unit controls so that the transfer voltage is not applied to the first transfer means of the image forming station adjacent to the upstream side in the moving direction of the predetermined image forming station. The image forming apparatus according to.

The control unit transfers the toner transferred to the surface of the intermediate transfer body to the recording material and then transfers the toner remaining on the surface of the intermediate transfer body on the upstream side of the predetermined image forming station in the moving direction. The image forming apparatus according to claim 1 or 2, wherein the collecting operation can be performed at an image forming station located downstream of the transfer unit .

The plurality of image forming stations are arranged on the downstream side of the transfer unit, and from the upstream side in the moving direction, a first image forming station, a second image forming station, a third image forming station, and a fourth image forming station. It is provided in the order of the image formation station of
The image forming station located at the most upstream in the moving direction is the first image forming station.
The image forming station adjacent to the upstream side is the second image forming station.
The predetermined image forming station is the third image forming station.
The image forming apparatus according to claim 3 , wherein the image forming station located on the downstream side is the fourth image forming station.

With respect to the moving direction, the toner provided on the downstream side of the transfer unit and upstream of the first image forming station and remaining on the surface of the intermediate transfer body is charged in the opposite polarity . Equipped with a charging member for
In the first image forming station, the control unit controls the first transfer means to apply the transfer voltage of the opposite polarity to the first transfer means, so that the charging member reverses the control. The image forming apparatus according to claim 4 , further comprising controlling the polarly charged toner to perform the recovery operation.

With respect to the moving direction, the toner provided on the downstream side of the transfer unit and upstream of the first image forming station and remaining on the surface of the intermediate transfer body has the normal polarity and the reverse polarity. Equipped with a charging member for polar charging,
The control unit can be controlled to apply the transfer voltage of the normal polarity by the first application means of the first image forming station.
In the first image forming station, by applying the transfer voltage of the normal polarity to the first transfer means by the first application means, the toner charged to the normal polarity by the charging member is said to have the same polarity. Perform a recovery operation,
In the second image forming station, by applying the transfer voltage of the opposite polarity to the first transfer means by the first application means, the toner charged in the opposite polarity by the charging member is charged. The image forming apparatus according to claim 4 , wherein the image forming apparatus is controlled so as to execute the recovery operation.

After the supply operation is completed , the control unit receives the first application means of each of the second image forming station, the third image forming station, and the fourth image forming station. The image forming apparatus according to claim 5 or 6 , wherein the transfer voltage having the opposite polarity is controlled to be applied to the first transfer means.

The image forming apparatus according to any one of claims 4 to 7 , wherein the fourth image forming station is a black image forming station.

The photoconductor, a developer that supplies toner of normal polarity to the surface of the photoconductor, a first transfer means that transfers the toner supplied to the surface of the photoconductor, and the normal polarity to the first transfer means. After applying the reverse polarity transfer voltage to the first application means for applying the reverse polarity transfer voltage having the opposite polarity to the first transfer means to transfer the normal polarity toner, the above-mentioned A plurality of image forming stations having a blade that abuts on the surface of the photoconductor to form a contact portion in order to clean the toner remaining on the surface of the photoconductor.
An intermediate transfer body that comes into contact with the surfaces of the plurality of photoconductors and to which the toner formed on the surfaces of the plurality of photoconductors is transferred,
A second transfer means that abuts on the intermediate transfer body to form a transfer portion and transfers the toner transferred in the transfer portion to the recording material.
Equipped with
An image forming apparatus capable of performing a supply operation for supplying the toner having the normal polarity to the contact portion of a predetermined image forming station.
A second transfer voltage having the normal polarity is applied to the first transfer means of the image forming station adjacent to the predetermined image forming station on the downstream side of the transfer portion in the moving direction of the intermediate transfer body. And the application means of
A control unit that controls the first application means and the second application means,
Equipped with
When the control unit executes the supply operation, the control unit
The transfer voltage was not applied to the first transfer means of the predetermined image forming station, and the transfer voltage was not applied.
An image forming apparatus, characterized in that the first transfer means of an image forming station adjacent to the upstream side is controlled to apply a transfer voltage having the normal polarity by the second applying means.

9. The control unit is characterized in that the transfer voltage is controlled so as not to be applied to the first transfer means of the image forming station adjacent to the downstream side in the moving direction of the predetermined image forming station. The image forming apparatus according to.

The plurality of image forming stations are arranged on the downstream side of the transfer unit, and the first image forming station, the second image forming station, and the third image forming station are in this order from the upstream side in the moving direction. It is provided in
The image forming station adjacent to the upstream side is the first image forming station.
The predetermined image forming station is the second image forming station.
The image forming apparatus according to claim 10, wherein the image forming station located on the downstream side is the third image forming station.

The control unit executes the supply operation when the number of continuously printed pages reaches a predetermined number of pages and the condition that the print ratio is equal to or less than the predetermined ratio is satisfied . The image forming apparatus according to any one of claims 1 to 11 , wherein the image forming apparatus is controlled .