Image forming apparatus and image forming method

An image and image density technology, applied in the direction of electric recording process applying charge pattern, electric recording process applying electric charge pattern, equipment of electric recording process applying electric charge pattern, etc., can solve the problem of inability to suppress toner scattering, etc., Achieve long-term stable image quality and suppress toner scattering

Inactive Publication Date: 2008-08-20
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the potential difference ΔV varies due to the difference in the amount of toner charge, and the amount of scattered toner varies due to the difference in the potential difference ΔV. Therefore, when the recovery force of the recovery roller is kept constant, there is a possibility that the toner cannot be suppressed. The problem of spraying

Method used

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  • Image forming apparatus and image forming method
  • Image forming apparatus and image forming method
  • Image forming apparatus and image forming method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0060] Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. 1 is an explanatory diagram showing a schematic configuration of an image forming apparatus of a drop-down developing method according to a first embodiment; FIG. 2 is a schematic configuration diagram showing a part of the developing unit in FIG. 1; FIG. A schematic configuration diagram of an example of a unitary tandem color image forming apparatus.

[0061] (image forming device)

[0062] The image forming apparatus of the first embodiment is an image forming apparatus based on a so-called drop-down development method in which a two-component developer including a magnetic carrier 4 and toner 5 is used, and is carried by a magnetic roller 1. The two-component developer forms a thin toner layer 9 on the developing roller 2 to develop the electrostatic latent image formed on the photoreceptor 3 (electrostatic latent image bearing member). As shown in ...

no. 2 approach

[0116] Hereinafter, a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 7 is an explanatory view showing a schematic configuration of an image forming apparatus of a drop developing method according to the present embodiment. FIG. 8 is a schematic configuration diagram showing a part of the developing unit shown in FIG. 7 . In addition, the same code|symbol is attached|subjected to the same component as 1st Embodiment, and description is abbreviate|omitted.

[0117] (image forming device)

[0118] The image forming apparatus of this embodiment forms an image by the above-mentioned so-called drop development method. As shown in FIG. 7, the image forming apparatus includes a photoreceptor 3 (electrostatic latent image carrier), and around the photoreceptor 3, a charging unit 8, an exposure unit 16, a developing unit 18, a primary transfer unit 22, two A secondary transfer unit 25, a fixing unit 26, a cleaning unit 24, ...

no. 3 approach

[0149] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 11 is an explanatory diagram showing a schematic configuration of an image forming apparatus of a drop developing method according to an embodiment of the present invention. FIG. 12 is a schematic configuration diagram showing a part of the developing unit shown in FIG. 11 . The same reference numerals are assigned to the same components as those in the first and second embodiments, and explanations thereof will be omitted.

[0150] (image forming device)

[0151] The image forming apparatus of the present invention forms an image by the aforementioned so-called drop development method. As shown in FIG. 11, the image forming apparatus includes the aforementioned photoreceptor 3 (electrostatic latent image carrier), and around the photoreceptor 3, a charging unit 8, an exposure unit 16, a developing unit 18, a primary transfer unit 22, A secondary transfe...

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PUM

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Abstract

The present invention provides an image forming apparatus having a developing device of a falling development method, in which, compared with the closest position of a two-component developer carrier and a toner carrier, the A toner recovery roller for recovering scattered toner in the vicinity of the toner carrier and the two-component developer carrier is arranged on the downstream side in the rotational direction of the two-component developer carrier, and is arranged on the between a two-component developer carrier and a wall of the casing, and the image forming apparatus includes: a bias unit that applies a bias voltage for recovering scattered toner to the toner recovery roller; and an image density detection unit for transferring the toner image developed on the surface of the latent electrostatic image bearing member or the toner image developed on the surface of the latent electrostatic image bearing member The density of the toner image on the body is detected to control the bias voltage.

Description

technical field [0001] The present invention relates to an image forming apparatus such as an electrophotographic copier, printer, facsimile machine, and their complex machines, and more particularly to a magnetic brush formed using a two-component developer that charges a non-magnetic toner with a magnetic carrier, An image forming apparatus that forms a thin layer of toner on a developing roller with a magnetic brush, and makes the toner in the thin layer of toner leap toward an electrostatic latent image, thereby developing the latent image. Background technique [0002] Conventionally, in an electrophotographic image forming apparatus, a one-component development method and a two-component development method are known as a development method using a dry toner. [0003] In the one-component development method, since the carrier is not contained, the electrostatic latent image on the photoreceptor is not disturbed by the magnetic brush formed by the carrier and the toner, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G9/107G03G15/00G03G13/08
Inventor 藤岛正之渡边昭宏上村纱代森幸广
Owner KYOCERA DOCUMENT SOLUTIONS INC
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