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Image forming apparatus which avoids defects due to substances bleeding from transferring member

一种成像装置、元件的技术，应用在应用电荷图形的电记录工艺的设备、应用电荷图形的电记录工艺、仪器等方向，能够解决不能执行形成图像、降低成像装置生产率等问题

Inactive Publication Date: 2006-04-05
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned method for removing unnecessary substances from an image bearing member has a problem in that, while the operation of removing unnecessary substances is performed, the operation of forming an image on a recording medium cannot be performed, thereby reducing the productivity of the image forming apparatus.

Method used

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  • Image forming apparatus which avoids defects due to substances bleeding from transferring member
  • Image forming apparatus which avoids defects due to substances bleeding from transferring member
  • Image forming apparatus which avoids defects due to substances bleeding from transferring member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] figure 1 An image forming portion P (toner image forming apparatus) of an image forming apparatus to which the present invention is applicable is shown. figure 1 is a schematic vertical sectional view of the image forming portion P, more specifically, in a direction parallel to the movement of the intermediate transfer belt 7 (image bearing member) as the intermediate transfer member (toner image bearing member) (by A schematic vertical cross-sectional view of the image forming portion P at a vertical plane indicated by an arrow R7).

[0032] In an image forming section P shown in the figure, an electrophotographic photosensitive member 1 in the form of a drum (hereinafter will be referred to as a "photosensitive drum") is provided.

[0033] In this embodiment, the photosensitive drum 1 is rotationally driven by a driving device (not shown) at a process speed (peripheral speed) of 100 mm / sec in a direction indicated by an arrow mark R1. In the vicinity of the outer pe...

Embodiment 2

[0065] In the first embodiment described above, the present invention is applied to a full-color image forming apparatus using four toners of different colors. In this embodiment, the present invention is applied to a monochrome imaging device. In this embodiment, the photosensitive drum is a toner image bearing member.

[0066] Figure 7 The overall structure of the imaging device of this embodiment is schematically shown. The photosensitive drum 41 (image bearing member) is composed of a cylindrical conductive substrate and a layer of photoconductive substance coated on the outer peripheral surface of the substrate. The photosensitive drum 41 is rotatably supported by its shaft so that it can rotate in a direction indicated by an arrow R41 in the figure. Disposed near the outer peripheral surface of the photosensitive drum 41 in a manner surrounding the photosensitive drum 41 are: a Scrotron type first charging device 42 for charging the outer peripheral surface of the ph...

Embodiment 3

[0082] In this embodiment, the second transfer roller cleaning process is different from that employed in the first embodiment.

[0083] Next, the present embodiment will be described in detail. Incidentally, the image forming section and the imaging device in this embodiment are the same as those in the above-described embodiment. That is, they are the same as figure 1 and 2 All shown are the same.

[0084] Figure 10 is a flowchart showing the operation flow of the image forming apparatus in the second transfer roller covered with toner mode. When the image forming apparatus starts to operate in the mode in which the second transfer roller is coated with toner (S21), black bands are formed in the image forming portion Pd (ie, the image forming portion for forming a black image (K)) on the photosensitive drum 1d (S22). The black band is formed on the photosensitive drum 1d through a charging process performed by the charging roller 2d, an exposing process performed by t...

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PUM

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Abstract

The invention relates to an imaging device and consists of a rotatable image supporting component; a toner imaging device, which is used for forming a toner image on the image supporting component; a transfer-printing component, which can contact the image supporting component and is used for transferring the toner image from the image supporting component onto a recording material in the transfer-printing region; a voltage source, which is used for exerting a first bias voltage to the transfer-printing component when the transfer-printing component transfers the toner image onto the recording material; and an executing device, which is used for executing the operation of toner exerting when no recording material exists in the transfer-printing region. The operation transfers the toner image from the image supporting component onto the transfer-printing component by exerting a second bias voltage to the transfer-printing component by the voltage source. The second bias voltage is provided with a polarity identical to the polarity of the first bias voltage and a polarity different from the polarity of the first bias voltage.

Description

technical field [0001] The present invention relates to an image forming apparatus which is substantially free from defects due to substances escaping from an image transfer member, in particular depositing Defects caused by problems on components. [0002] An image transfer operation using an image transfer member in contact with an image bearing member is widely used because a recording material can be fed stably. However, this type of transfer operation has a problem that material escaping from the transfer member is deposited on the image bearing member. If this problem occurs, the toner image is damaged. Up to this point, every time a substance escaping from the transfer member adheres to the image bearing member, an operation of removing the substance from the image bearing member needs to be performed. As a method for removing such a substance, a toner image is formed on an image bearing member, this substance is removed together with the image formed by the toner. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/16G03G21/14G03G15/00
CPCG03G15/1675G03G15/168G03G15/16G03G2215/1614G03G2215/1661
Inventor 池田雄一东峰准
Owner CANON KK