Image forming method and device

An image and intermediate transfer belt technology, applied to the electrical recording process using the charge pattern, the equipment of the electric recording process using the charge pattern, and the electrography, etc., can solve the problem of different image quality on the front and back sides, and achieve shortening of the fixing process. Start-up time, improved reliability, and increased fusing contact effects

Inactive Publication Date: 2007-07-18
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the above-mentioned image forming apparatus that transfers the unfixed ink images on both sides of the paper and fixes them at once, there is a problem that the quality of the images on the front and back of the paper after fixing may be different.

Method used

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  • Image forming method and device
  • Image forming method and device

Examples

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Embodiment Construction

[0059] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0060] FIG. 1 is a schematic sectional view of a printer as an example of an image forming apparatus to which the present invention is applied.

[0061] In the printer 100 shown in the figure, a photoreceptor drum 1 serving as a first image carrier is disposed approximately in the center of the device. Around the photoreceptor drum 1, a cleaning device 2, a static elimination device 3, a charging device 4, and a developing device 5 are arranged. In the figure, an exposure device 7 is provided above the photoreceptor drum 1 , and laser light L emitted from the exposure device 7 is irradiated onto the photoreceptor 1 at a writing position between the charging device 4 and the developing device 5 .

[0062] In this embodiment, the photoreceptor drum 1, the cleaning device 2, the electricity removing device 3, the charging device 4, the developing device 5,...

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PUM

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Abstract

An image forming apparatus which may form first and second visual images on first and second sides of a recording medium, includes a first image bearing member, a second image bearing member, a first transfer device that transfers the first visual image formed on the first image bearing member onto the second image bearing member or the second visual image formed on the first image bearing member onto the second side of the recording medium, a second transfer device that transfers the first visual image carried by the second image bearing member onto the first side of the recording medium, and a fixing device including first and second fixing members so as to fix the second and first visual images on the second and first sides of the recording medium, respectively. Surface properties of the first fixing member and the second image bearing member are substantially the same.

Description

technical field [0001] The present invention relates to a method and apparatus for forming images on both sides of a recording medium. Background technique [0002] Some image forming apparatuses such as copiers, printers, and facsimiles can form images on both sides of a recording medium (hereinafter simply referred to as “paper” for simplicity). In the conventional image forming apparatus capable of double-sided recording, the following method is generally used: the image (developed image) formed on one side of the image carrier is transferred to paper, fixed, and then the paper is turned over by a reversing passage or the like. , the paper is fed again, and the image on the other side (developed image) is transferred to the back of the paper for fixing. [0003] In the case of recording on both sides as described above, there are many problems in ensuring the reliability of paper transportation due to the switching of the paper transportation direction and paper curling ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/23G03G15/20G03G21/00G03G15/00G03G15/16G03G21/14
CPCG03G15/232G03G2215/2083
Inventor 小俣安国持丸英明
Owner RICOH KK
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