JPS5846365A - Developing device for recorder - Google Patents

Abstract

PURPOSE:To prevent the scattering of a toner and to eliminate the contamination in a recorder by disposing conductive members in proximity to a carrier for electrostatic images and applying a prescribed voltage upon said members. CONSTITUTION:Conductive members 15, 16 in proximity to a recording medium 1 are mounted via an insulator S to a supply port 13 for a developer D of a tank 12. A prescribed voltage is applied to the members 15, 16 by an electric power source E to prevent the scattering of the toner D through the supply port 13 of the tank by the electric field curtain formed by said application. Thus the contamination in the recorder is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a current device in a recording apparatus, and more particularly to a developer device that prevents toner contained in a dry developer from scattering outside the current device.

To explain the outline of the above-mentioned recording apparatus, as shown in FIG. , a static eliminator number for removing unnecessary potential, a cleaning device 5 for removing unnecessary residual toner, and a recording medium 1.
a charging device 6 that applies a required potential to the image, an exposure device 7 that projects an insulator IK image 9, etc., and a latent g1 of the recording medium 1 caused by exposure.
A developing device 8 that visualizes the recorded weight and a transfer paper P that visualizes the recorded weight.
The configuration includes a transfer device 9 that transfers the image to a sheet of paper, and a heat fixing device 10 that heats and fixes the transfer paper POsr in the order of steps.

In this recording apparatus, the pre-distributor 8 uses the toner contained in the dry developer to determine the fI of the recording medium 1! It is a tribute to Cao.

However, toner easily becomes dust and scatters, and the charging device @ 6
It also adheres to the charge wire of the corona discharger of the transfer device 9, causing an adverse effect on itgI.
Efforts have been made to prevent toner and other substances from entering the corona discharger. t7t1 The scattered toner also contaminates the AT inside the recording device, causing various troubles.

This I1M prevents toner from contaminating the inside of the C1me sickle device by preventing toner from scattering from the dry developer supply port of the developing device, which is the cause of toner leaking out from inside the developing gII device. I am trying to do this so that it will not happen.

Hereinafter, the present invention will be subdivided according to the embodiments shown in FIGS. 2 to 5. FIG. a tank 12 provided in the tank 12 and a supply port 13 of the armpit tank 12;
From recording device recording body (latent carrier) IK dry ink agent D
It is provided with an iAgII sleeve 14 that supplies t- and performs ll14a conversion.

According to the present invention, the conductive member 1 adjacent to the recording medium 1
5.16 is electrically insulated from the insulator BfC and attached to the supply port 13 of the tank. Conductive member 15.16H
They are located above and downstream of the current gII effective area, respectively, and are given a predetermined potential by the power supply 1 to form an electric field curtain for preventing toner scattering.

In this embodiment, when the toner has a charge t in advance (for example, in the case of a high-resistance toner regardless of whether it is one component or two components), the potential K applied to the conductive members 15 and 16 can be arbitrarily selected. Therefore, toner can be transferred to the conductive member 135, 16 side as well as to the recording medium 1. If the toner does not have a charge in advance (low resistance toner, for example, a one-component electrostatic induction type) (in the case of toner), the conductive member 15.16
Toner adheres to both @ and the recording medium ill. In the case of the latter low-resistance toner, the recording medium I of the conductive member 15.16
By making the surface facing the I/C uneven, a protruding end tube is formed on the surface, and at the same time, the number of surface species is increased, and the toner adhesion characteristics are improved. A large amount of toner can be attached.

In this manner, the electric field created by the conductive members 15, 16 prevents toner from scattering from the supply port 1-8 of the tank.

Figure 3 shows a second embodiment of the present invention, in which a conductive member 15.
A predetermined potential of 1 is applied to the charging device 18, and a discharge radio wave from the 6-fatty corona discharger 17 is used.
For example, this can be easily implemented using a varistor, a Zener diode, or the like.

In the case of charging, an electrode for collecting electricity from a part of the discharger 17 is used, and the conductive members 15 and 16 are given a predetermined potential of the same polarity as the charging polarity of the recording medium 1.

FIG. 4 shows a third embodiment of the present invention, in which conductive members 15 and
18T - This is an example of a case in which the recording medium 15 is grounded, and the electric charge on the recording medium 1 is used to form an electric field between it and the conductive member 15.18. The electric field can also be created by electrically insulating (floating) the conductive members 15 and 16. In either case, charges are induced or polarized in the conductive members 15, 16 by the electric field caused by the latent charges, and an electric field curtain is formed.

FIG. 5 shows a fourth embodiment of the present invention, in which corona discharge 1) 1
7 is provided with a conductive member 15'l and this is connected to the supply port 1 of the tank.
3, and ground the other conductive member 16Fi,
The electric field curtain is formed by fully utilizing the discharge voltage and latent damage voltage of the discharge device 17.

Each of the embodiments has been described above, but in short, the key to the present invention is to arrange a conductive member near the current device and close to the latent capital carrier and apply a predetermined potential to it, or to use a float-like opening. By doing so, an electrical field is formed between the conductive member and the latent charge carrier, and this causes the toner floating from the current device to be absorbed within this field. Since there is very little need to go outside, it is possible to prevent contamination of the inside of the recording device, and troubles for each woodcutter can be prevented.

As mentioned above, the developer is a one-component system.

Regardless of whether the toner is a two-component type or whether the toner is pre-charged or not, it moves in either direction in the field and is forced to adhere.

In addition, although the recording device used by Denshi Gun Shinni is shown as an example, it is sufficient if it is an electrostatic latent recording device, the latent document carrier may be other than a belt-like one, and the developing device The invention is not limited to what is shown in this figure.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of a general electrophotographic recording apparatus, and FIGS. 2 to 5 are cross-sectional explanatory diagrams of the present apparatus according to the first to fourth embodiments of the present invention, respectively. 1... Recording body (latent carrier), 11... Genso device,
12...tank, 13--supply port, 14--Genshun sleeve, 15.18--conductive member, 17--corona discharger, D--dry current agent, S... Insulator. Agent Patent Attorney Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A tank containing a dry developing agent, and a sleeve provided in the tank and supplying the dry developing agent to a submerged carrier of a recording device from a supply port of the tank to perform visualization. In the current gI device, a conductive member in the vicinity of the pre-distribution carrier is electrically insulated and provided at the supply port of the tank, so that the toner contained in the dry toner is not removed from the tank. Electric field curtain t-m to prevent scattering from the supply port of
The current recording device is made of a conductive member.