Toner deterioration judging method, image forming apparatus and developing apparatus

A developing device and degradation judgment technology, which is applied in the fields of toner deterioration judgment, developing device and image forming device, can solve problems such as increased blur, discarding, and delayed waste toner time, and achieve the effect of improving accuracy

Inactive Publication Date: 2010-09-29
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the conventional technology, since the deterioration of the toner is predicted with time, the actual state of the toner cannot be grasped, and the accuracy is lacking.
For example, even if the amount of nip between the developing roller and the developer supply roller is uneven or the printing ratio is the same, the toner for development is selected depending on the pattern, and the speed of deterioration of the toner changes.
As a result, the time to discard the toner is delayed, the amount of blurring increases, or the usable toner is discarded in vain.

Method used

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  • Toner deterioration judging method, image forming apparatus and developing apparatus
  • Toner deterioration judging method, image forming apparatus and developing apparatus
  • Toner deterioration judging method, image forming apparatus and developing apparatus

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Embodiment Construction

[0031] Embodiments of the present invention will be described below with reference to the drawings.

[0032] figure 1 It is a figure which shows the embodiment of the image forming apparatus provided with the developing device of this invention, figure 2 will be figure 1 A zoomed-in view of the yellow image forming station.

[0033] Such as figure 1 As shown, the image forming apparatus 10 has four image forming stations 15 (Y, M, C, K), an intermediate transfer belt 70, a secondary transfer unit 80, a fixing unit 90, a notification unit for the user and A display unit 95 constituted by a liquid crystal panel, and a control unit 100 serving as a control unit, wherein the control unit 100 controls the above-mentioned units and manages the operation of the image forming apparatus.

[0034] The image forming stations 15 (Y, M, C, K) each have a function of forming images from yellow (Y), magenta (M), cyan (C), and black (K) toners. The image forming stations 15 (Y, M, C, K)...

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Abstract

The invention provides a toner deterioration judging method capable of detecting the toner state in high accuracy, an image forming apparatus and a developing apparatus. The toner deterioration judging method includes measuring a time taken for a recess formed on a toner surface to be evened due to flowability of the toner, and judging deterioration of the toner in accordance with the measured time.

Description

technical field [0001] The present invention relates to a toner deterioration determination method for developing an electrostatic latent image on a latent image carrier with toner, a developing device, and an image forming device. Background technique [0002] Conventionally, if low-duty printing continues, toner deterioration occurs, so there is a technique of developing toner in non-image areas according to the number of printed sheets or development drive time and discarding it (Patent Literature 1). [0003] [Patent Document 1] Japanese Patent Laid-Open No. 2000-181216 [0004] However, in the prior art, since the deterioration of the toner is predicted with time, the actual state of the toner cannot be grasped, and the accuracy is lacking. For example, even if the amount of nip between the developing roller and the developer supply roller is uneven or the printing ratio is the same, the toner to be developed is selected depending on the pattern, and the speed of dete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/10G03G15/00
CPCG03G15/0831G03G15/0856G03G15/0862
Inventor 佐藤诚五十川贵将
Owner SEIKO EPSON CORP
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