Development apparatus and image forming apparatus including same
A technology of developing device and developer, which is applied in the fields of electric recording process using charge pattern, equipment for electric recording process using charge pattern, and electrography, etc., which can solve the problem of stirring performance, developing performance cannot be fixed, and developer dose cannot be maintained , Inability to perform stable development and other problems, to achieve stable development and stable development performance
Inactive Publication Date: 2007-10-17
SHARP KK
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Therefore, in a state of high fluidity, the amount actually discharged is smaller than the amount that should be discharged, and conversely, in a state of low fluidity, the amount actually discharged is larger than the amount that should be discharged. Keep the amount of developer in the developer container within the proper range
[0019] Furthermore, when the amount of developer in the developer container is large, the amount of developer to be stirred and conveyed increases until the excess amount of developer is discharged, so the stirring performance and the developing performance are not constant, and there is a possibility that stable development cannot be performed. question
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[0045] FIG. 2 is a longitudinal sectional view showing the structure of the image forming apparatus A according to the present embodiment. An image forming apparatus (hereinafter referred to as “the present image forming apparatus”) A according to this embodiment forms multi-color and monochrome images on predetermined paper (recording medium) based on image data transmitted from the outside. 2, the image forming apparatus A includes an exposure unit 1, a developing unit 2, a photosensitive drum 3, a charger 5, a cleaning unit 4, an intermediate transfer belt unit 8, a fixing unit 12, a paper transport path S, The paper feed cassette 10, the paper discharge tray 15, and the like are constituted.
[0046] The image data processed in the image forming apparatus A corresponds to a color image using the respective colors of black (K), cyan (C), magenta (M), and yellow (Y). Therefore, the developing unit 2 (2a, 2b, 2c, 2d), the photosensitive drum 3 (3a, 3b, 3c, 3d), the charger 5...
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In the development apparatus and the image forming apparatus of the present invention, a first regulation member for regulating an upper surface of developer is provided on an adjacent and downstream portion with respect to a developer outlet in terms of travel direction of developer. The amount of developer passing below the first regulation member is thus adjusted. On this account, the present invention provides a development apparatus and an image forming apparatus capable of maintaining appropriate amount of developer in the developer container by reducing influence of developer fluidity or the like. With stable stirring performance and development performance, the development apparatus and the image forming apparatus of the present invention perform secure development, including the time period until the extra developer overflows and is discharged.
Description
technical field [0001] The present invention relates to a developing device mounted on an electrophotographic image forming device such as a copying machine, a printer, a facsimile machine, etc., and specifically relates to a developing device for making a photoreceptor (image) using a two-component developer composed of toner and a carrier. A developing device for developing an electrostatic latent image on the surface of a carrier). Background technique [0002] In electrophotographic image forming apparatuses, the visualization (development) of an electrostatic latent image on the surface of a photoreceptor (image carrier) is often performed using a two-component developer (hereinafter sometimes simply referred to as a developer) consisting of a carrier and a toner. the developing device. In a developing device using such a two-component developer, the toner is gradually consumed by the developing operation, but the carrier is not consumed and remains in the device. The...
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IPC IPC(8): G03G15/08G03G15/00
CPCG03G15/0868G03G2215/0822G03G2215/0838G03G15/0834G03G15/0893G03G2215/0119
Inventor 广田贵
Owner SHARP KK