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Development device, process cartridge, and image forming apparatus

A technology for developing equipment and processing cartridges, which is applied in the direction of electric recording process applying charge pattern, equipment and apparatus of electric recording process applying electric charge pattern, etc. performance effect

Inactive Publication Date: 2009-06-03
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the internal pressure of the device rises, the floating toner is ejected from the gaps between the components constituting the device, and when it disperses further, it contaminates the inside of the image forming device.
[0005] Here, in order to prevent the toner contained in the developing device from scattering outside the device, many technical proposals have been made.

Method used

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  • Development device, process cartridge, and image forming apparatus
  • Development device, process cartridge, and image forming apparatus
  • Development device, process cartridge, and image forming apparatus

Examples

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Embodiment Construction

[0035]Hereinafter, the present invention will be described with respect to an embodiment of a full-color printer (hereinafter referred to as "printer") applied to an image forming apparatus. Figure 1 shows a schematic configuration diagram of the printer. As shown in FIG. 1, the printer includes four image forming units 2Y, M of photoreceptors 1Y, M, C, and K of image carriers for forming toner images of respective colors such as yellow, magenta, cyan, and black. , C, K. In addition, the printer also includes an optical writing unit 333 for writing electrostatic latent images on the photoreceptors 1Y, M, C, and K after scanning and exposing the laser light whose frequency has been converted according to image information. Furthermore, the printer also includes an intermediate transfer unit 4 that transfers the toner images on the photoreceptors 1Y, M, C, and K to the transfer paper via the intermediate transfer belt 3, and transfers the toner images to the transfer paper. Th...

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PUM

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Abstract

The invention provides a development device capable of separating a flyheaded toner from a part contacting with an user with good maintainability performance, and a process cartridge using the development device and image forming apparatus. The development device comprises: a development roller 27 configured to carry developer and disposed in a development case, partly exposed from an opening of the development case facing a sensitizatoon body 1, a developer-transporting screw 31a configured to transport the developer to the developer roller 27, and a discharging space 26 for discharging air from a communication port 34 in ralative area for communicating the development roller 27 and the developer-transporting screw 31a through a discharging port 35 that opens in a longitudinal direction of the developer-transporting screw 31a.

Description

technical field [0001] The present invention relates to image forming equipment such as copiers, printers, facsimile machines, plotters and their complex machines, or digital light engraver (DLE: Digital Light Engraver), and developing equipment and process cartridges used therein. Background technique [0002] In a developing device that uses a two-component developer composed of toner and carrier, a developing chamber that exposes a part to the opening and places the developer is provided in a developing chamber that has an opening formed toward the image carrier. The toner carrier, and the developer conveying member that mixes and stirs the toner and the carrier in the device, and conveys the developer controlled in the appropriate toner concentration to the developer carrier, etc. The amount of developer loaded on the developer carrying member by the developer conveying member is regulated by the developer regulating portion, and then conveyed to a developing region faci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08G03G21/18G03G21/00G03G15/01
CPCG03G21/20G03G21/206G03G15/0846G03G15/0849G03G15/0887G03G15/0893
Inventor 服部良雄吉田圭一上西裕之
Owner RICOH KK
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