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Image forming apparatus, developing apparatus, and image forming unit

An image and developing member technology, which is applied in the direction of electric recording process applying charge pattern, equipment and instrument of electric recording process applying charge pattern, etc. The effect of uneven concentration

Active Publication Date: 2022-03-29
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, it is impossible to suppress unevenness in image density during the rotation cycle of the two developing rollers, which is caused by the respective rotations of the two developing rollers.

Method used

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  • Image forming apparatus, developing apparatus, and image forming unit
  • Image forming apparatus, developing apparatus, and image forming unit
  • Image forming apparatus, developing apparatus, and image forming unit

Examples

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Embodiment Construction

[0028] Hereinafter, an embodiment of an electrophotographic full-color copier (hereinafter simply referred to as a "copier") will be described as an image forming apparatus to which the present invention is applied.

[0029] First, the basic configuration of the copying machine according to the embodiment will be described. figure 1 Shown is a schematic configuration diagram of a copying machine according to the embodiment. In this figure, the copier includes an image forming unit 100 that forms an image on a recording sheet, a paper feeder 200 that supplies a recording sheet 5 to the image forming unit 100 , a scanner 300 that reads an image of a document, and the like. In addition, an automatic document feeder (ADF) 400 attached to the upper part of the scanner 300 and the like are provided. The image forming section 100 is provided with a manual tray 6 for manually placing the recording sheets 5 , a stack tray 7 for stacking the recording sheets 5 on which image formation ...

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PUM

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Abstract

The present invention relates to an image forming apparatus, a developing device, and an image forming unit capable of suppressing the cycle of rotation of the surface of a plurality of developing members (81Y), (82Y) that is caused by the orbital movement of the surface of a plurality of developing members (81Y), (82Y) Image density is uneven. It includes a latent image carrier (20Y) and a developing mechanism (80Y) having a plurality of developing members (81Y), (82Y), and is respectively applied to the plurality of developing members (81Y), (82Y) from a common power source The development bias voltage on the circuit is periodically changed and output, so that the surfaces of multiple developing members (81Y) and (82Y) are respectively circled and moved in the same cycle, and according to the multiple developing members (81Y), (82Y) The output value of the developing bias voltage fluctuates at the same period as the above-mentioned period based on the detection result of the posture detection means that detects the orbiting movement posture of at least one of the surfaces.

Description

technical field [0001] The present invention relates to an image forming apparatus and a developing device and an imaging unit mounted therein. Background technique [0002] Conventionally, there is known an image forming apparatus which includes a latent image bearing body carrying a latent image and a developing mechanism having a plurality of developing members, and performs a development bias applied to each developing member from a common power source. The output is changed periodically, wherein the aforementioned plurality of developing members develop the latent image on the latent image carrier. [0003] For example, an image forming apparatus described in Patent Document 1 includes a photoreceptor as a latent image bearing body, a developing device as a developing mechanism having a first developing roller as a developing member, and a high-voltage power source that outputs a developing bias. and the second developing roller, the aforementioned developing bias volt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/06G03G15/01
CPCG03G15/065G03G15/0173G03G15/0806G03G2215/0648G03G15/0855G03G15/0865G03G15/0889G03G15/0891G03G15/5058
Inventor 木村秀树
Owner RICOH KK
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