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Double-face electronic processor-camera mechanism and method for controlling its toner image concentration

A technology of toner image and developing mechanism, which is applied in the direction of electric recording process applying charge pattern, equipment for applying electric recording process of charge pattern, electric recording technique, etc. control the toner image density, etc.

Inactive Publication Date: 2004-05-12
SAMSUNG ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, in a conventional electrophotographic developing mechanism, especially in a duplex electrophotographic developing mechanism, since the impedance value of the transferred toner image is added to the impedance value of the printing medium, the impedance value of the front side of the printing medium may be Different from the impedance value on the back side of the printed medium
Thus, it becomes impossible to properly control the density of the toner image with respect to changes in the humidity of the printing medium according to changes in the environment
In addition, in the case where the front side printing and the back side printing of the printing medium are repeated, since the measured impedance value is constantly changed, the change of the concentration to be controlled is also repeated, and the constant repetition of the control value may cause the electrophotographic developing mechanism to go wrong
Since the control operation of the density of the toner image is accomplished only by the measurement of the printing medium passing between the transfer roller 19 and the fixing roller 21, if the same printing medium is provided at the same temperature and humidity, electronic The photo-developing mechanism is more likely to have the above problems

Method used

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  • Double-face electronic processor-camera mechanism and method for controlling its toner image concentration
  • Double-face electronic processor-camera mechanism and method for controlling its toner image concentration
  • Double-face electronic processor-camera mechanism and method for controlling its toner image concentration

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[0024] Reference will now be made in detail to the presently preferred embodiments of the invention, examples of which are shown in the accompanying drawings, wherein corresponding reference numerals represent corresponding elements throughout. The embodiments are described in order to explain the present invention by referring to the figures.

[0025] figure 2 It is a schematic diagram of a double-sided electrophotographic developing mechanism according to an embodiment of the present invention. refer to figure 2 , the double-sided electrophotographic developing mechanism includes: a printing medium tray 111, a pick-up roller 113, a supply roller 115, a photosensitive belt 117, a transfer roller 119, a fixing roller 121, a toner image forming unit 123 , a tray opening / closing detection unit 125 and a power detection unit 127 .

[0026] The print medium tray 111 is located at a desired position of the electrophotographic developing mechanism, and sorts and loads print med...

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Abstract

A duplex electro-photographic developing machine including a printing medium tray loading a printing medium, a tray open / closed detecting unit detecting whether the printing medium tray has been opened and closed, a transferring roller transferring a toner image onto the printing medium, a resistance measuring unit measuring a resistance value of the printing medium passing the transferring roller, and a concentration controlling unit controlling a concentration of the toner image according to the measured resistance value measured by the resistance measuring unit in response to the printing medium tray having changed from an open state to a close state.

Description

technical field [0001] The invention relates to a paper impedance detection device of an electro-photographic developing machine, in particular to a paper impedance detection device of a duplex electro-photographic developing machine, which is used for detecting the impedance of a sheet of paper, and Accordingly, the density of a toner image is controlled to a desired level, and a method thereof. Background technique [0002] Generally, an electrophotographic developing mechanism is an integrated office equipment (OA) device that includes the functions of a copying machine, a printing machine, a facsimile machine, and the like. A photosensitive medium, such as a photosensitive belt or drum, is often used in an electrophotographic developing mechanism. The surface of this photosensitive medium is charged by the charging voltage control device. Subsequently, the potential level is selectively changed by the scanning of the light beam, thereby forming an electrostatic latent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/06G03G15/00G03G15/16
CPCG03G2215/1666G03G2215/00067G03G15/5029G03G15/168G03G15/06
Inventor 沈愚贞杨澈柱金旻宣
Owner SAMSUNG ELECTRONICS CO LTD
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