KR19980057626U - Recording paper static eliminator of electrophotographic processor - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs.

The present invention relates to a recording paper static eliminator of an electrophotographic processor.

I. The technical problem that the invention is trying to solve.

The present invention can prevent curling of the recording paper by removing static electricity at the same time as the recording paper passes between the heating roller and the compression roller.

All. The gist of the solution of the invention.

The present invention provides a fixing apparatus for an electrophotographic processor comprising a heating roller for melting a toner image formed on a recording paper with high temperature heat and a compression roller for fixing the toner image on the recording paper at a constant pressure. Forming a conductive tubing layer on the surface of the compression roller in order to prevent static electricity generated when passing through the heating roller and the compression roller, characterized in that the plate to ground the tubing layer is installed in contact with the compression roller.

la. Important uses of the devise.

The present invention is applied to an image forming apparatus of an electrophotographic processor such as a laser beam printer, a copier, a multifunction printer, a general paper fax machine, and the like.

Description

Recording paper static eliminator of electrophotographic processor.

The present invention relates to an image forming apparatus of an electrophotographic processor such as a laser beam printer, a copier, a general paper facsimile machine, a multifunction machine, and more particularly, an electrophotographic processor capable of preventing static electricity generated when an image-forming recording paper passes through a fixing unit. The present invention relates to a recording paper antistatic device.

Typically, a printing apparatus using an electrophotographic developing method has a property of a conductor when irradiated with light, and a photosensitive drum which has a property of an insulator when the light is not irradiated to form a predetermined latent image, and a high voltage is applied to the photosensitive drum. A charging roller of a charging device to be charged and applied, a laser scanning unit for uniformly charging a predetermined text signal or image signal transmitted from a predetermined computer onto a predetermined portion on the photosensitive drum, and exposing electrical energy to light energy; A developing roller for adhering the local fine toner powder charged in a predetermined shape onto the photosensitive drum, a transfer unit of the transfer apparatus for transferring the fine toner powder adhered to the photosensitive drum onto the recording paper at high pressure, and a high temperature and high pressure. A fixing unit for fixing fine toner on the recording paper, and the recording paper It consists of a paper-feeding unit, a driving unit for driving the respective components with each other to transfer to the organic location.

Referring to FIG. 1, the image forming apparatus of the electrophotographic processor configured as described above will be described with reference to FIG. 1. The surface of the photosensitive drum 40 is electrically uniformly charged by the corona discharge of the charger 42. The portion charged by the rotation of the photosensitive drum 40 receives an electrical signal for forming an image through the exposure unit 44 and exposes the surface of the photosensitive drum 40. A latent image is formed. Thereafter, the electrostatic latent image formed on the surface of the photosensitive drum 40 is developed with a toner while passing through the developing unit 46 to become a visible image.

Thereafter, the recording paper 20 mounted on the paper feed cassette 52 is fed to the feed roller 48 side by the pickup roller 52. Thereafter, the fed recording paper 20 is transferred to the transfer roller 50 side by the rotation of the transfer roller 48. Thereafter, the toner image on the surface of the photosensitive drum 40 is transferred onto the recording paper 20 by the high pressure action of the transfer roller 50. Thereafter, the recording paper 20 on which the image is formed is conveyed so that the image is fixed by heat and pressure while passing between the heating roller 10 and the compression roller 12 of the fixing unit. Thereafter, the printed recording paper 20 is transferred to the pedestal 62 by the rotation of the first and second media rollers 58 and 60 so that the printing desired by the user is achieved.

On the other hand, residual toner and a latent image exist on the surface of the photosensitive drum 40 passing through the transfer roller 50, wherein the toner is removed by the cleaner 54, and the remaining charge is removed from the charge removing lamp 56. It is removed by.

In the image forming apparatus of the electrophotographic processor operating as described above, a recording paper 20 in which a toner image is fixed by heat and pressure of the heating roller 10 and the compression roller 12 of the fixing unit, as shown in FIG. 2. Brush 30 is installed in the body frame to prevent static electricity generated when the transfer to the discharge roller side. At this time, the brush 30 is grounded.

According to the above configuration, when the printer is powered on, the printer is warmed up to perform the printing operation. Thereafter, the surface of the heating roller 10 is heated to a predetermined temperature by a halogen lamp (not shown), and the compression roller 12 is heated by applying heat from the surface of the heating roller 10. Thereafter, when the temperature of the surface of the heating roller 10 rises to an appropriate value, thermistor (not shown) detects this to control the temperature. Subsequently, when the toner image is fixed on the recording paper 20 by the transfer roller 50 as described above with reference to FIG. It is conveyed between the compression rollers 12. Thereafter, the toner image is fixed on the recording paper 20 by the high temperature heat of the heating roller 10 and the pressure of the compression roller 12. Subsequently, static electricity is generated on the surface of the recording paper 20 while passing between the heating roller 18 and the compression roller 32. Thereafter, the recording paper 20 is transferred to the brush 30 side by the rotation of the compression roller 12 and the heating roller 10, and then the brush 30 is static electricity on the recording paper 20. Will be removed. Thereafter, the recording paper 20 from which the static electricity is removed is transferred to the pedestal side by the rotation of the discharge roller, thereby completing the printing process.

However, in order to remove the static electricity formed on the surface of the recording paper as described above, the connection structure for grounding the brush is complicated by installing a separate brush on the main body frame, and the brush is narrowed between the fixing unit and the discharge roller. It is confined to the installation space by being installed in the space, and since the toner on the surface of the heating roller sticks to the surface of the compression roller when the recording paper is transported, the surface of the compression roller is contaminated to form a high resolution image. Also, since the static electricity on the recording paper is completely removed between the heating roller and the compression roller, the recording paper curls due to the heat of the heating roller, which causes a paper jam phenomenon. A problem occurred.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide an electrophotographic processor recording paper static eliminating device capable of completely eliminating static electricity generated when an image forming recording paper passes between a heating roller and a compression roller. .

Another object of the present invention is to provide a recording paper static elimination device of an electrophotographic processor capable of preventing curling of the recording paper by removing static electricity at the same time as the recording paper passes between the heating roller and the compression roller.

It is still another object of the present invention to provide a recording paper static eliminating device of an electrophotographic processor capable of forming a recording paper jam and a high resolution image.

In order to achieve the above object, the present invention is a fixing of an electrophotographic processor having a heating roller for melting a toner image formed on a recording paper with high temperature heat, and a compression roller for fixing the toner image on the recording paper at a constant pressure. An apparatus, comprising: a conductive tubing layer formed on a surface of the compression roller to prevent static electricity generated when the recording paper passes through the heating roller and the compression roller, and a plate for grounding the tubing layer is in contact with the compression roller. It is characterized in that the installation.

1 is a schematic diagram showing a configuration of an image forming apparatus of an electrophotographic processor commonly used.

2 is a schematic diagram showing the configuration of a recording paper static eliminating device of an electrophotographic processor according to an embodiment of the prior art;

Figure 3 is a schematic diagram showing the configuration of a recording paper static eliminating device of the electrophotographic processor according to an embodiment of the present invention.

Explanation of symbols for the main parts of the drawings

10: heating roller 12: compression roller

14: tubing layer 16: plate

18: paper guide 20: recording paper

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used for the same components, even if displayed on different drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Figure 3 is a schematic diagram showing the configuration of a recording paper static eliminating device of the electrophotographic processor according to an embodiment of the present invention.

As shown in Fig. 3, the fixing unit of the image forming apparatus is installed in a fixing unit frame (not shown), in which a heating roller 10 for melting a toner image formed on the recording paper 20 with high temperature heat. Inside the heating roller 10, a halogen lamp (not shown) for dissipating and heating a high temperature of about 150 ° C to 200 ° C is installed at the center. The lower surface of the heating roller 10 is provided with a compression roller 12 made of silicone material for fixing the toner image on the recording paper 20 at a constant pressure.

And, after the image is fixed on the surface of the recording paper 20 on the outermost peripheral surface of the compression roller 12 to remove the static electricity generated when passing through the heating roller 10 and the compression roller 12 and At the same time, a heat-resistant conductive Teflon tubing layer 14 is formed in order to prevent the toner on the surface of the heating roller 10 from sticking to the surface of the compression roller 12. In addition, one side of the tubing layer 14 is provided with a plate 16 for grounding the tubing layer 14 to zero the static electricity on the recording paper 20. In this case, the compression roller 12 may prevent a curl phenomenon of the recording paper 20 due to the high temperature heat of the heating roller 10.

According to the above configuration, when the printer is powered on, the printer is warmed up to perform the printing operation. Thereafter, the surface of the heating roller 10 is heated to a predetermined temperature by a halogen lamp (not shown), and the compression roller 12 is heated by applying heat from the surface of the heating roller 10. Thereafter, when the temperature of the surface of the heating roller 10 rises to an appropriate value, thermistor (not shown) detects this to control the temperature. Subsequently, when the toner image is fixed on the recording paper 20 by the transfer roller 50 as described with reference to FIG. 1, the recording paper 20 is connected to the heating roller 10 by the guide of the paper guide 18. It is conveyed between the compression rollers 12. Thereafter, the toner image is fixed on the recording paper 20 by the high temperature heat of the heating roller 10 and the pressure of the compression roller 12. Subsequently, the static electricity generated on the recording paper 20 is removed while passing between the tubing layer 14 and the heating roller 18 formed on the surface of the compression roller 12. That is, the static electricity on the recording paper 20 is applied to the tubing layer 14 and the static electricity applied to the tubing layer 14 is grounded while passing through the plate 14 again.

Thereafter, the recording paper 20 is transferred to the discharge roller side by the rotation of the compression roller 12 and the heating roller 10, and then the recording paper 20 from which the static electricity is removed is moved to the pedestal side by the rotation of the discharge roller. As it is transferred, the printing process is completed.

As described above, the recording paper static eliminating device of the electrophotographic processor according to the embodiment of the present invention provides an installation space by forming a conductive tubing layer on the surface of the compression roller without installing a separate brush to remove static electricity on the recording paper. The cost of the product is reduced due to the reduction of the number of parts, and the curling phenomenon of the recording paper is eliminated because the static electricity on the recording paper is removed as the recording paper passes between the heating roller and the compression roller. It can be prevented, and also to prevent the toner on the surface of the heating roller sticking to the surface of the compression roller, it is possible to form a high-resolution image.

Claims (3)

A fixing apparatus of an electrophotographic processor comprising a heating roller for melting a toner image formed on a recording sheet with high temperature heat and a compression roller for fixing the toner image on the recording sheet at a constant pressure. In order to prevent static electricity generated when the recording paper 20 passes through the heating roller 10 and the compression roller 12, a conductive tubing layer 14 is formed on the surface of the compression roller 12, and the tubing And a plate (16) for grounding the layer (14) in contact with the compression roller (12). The method of claim 1, wherein the tubing layer (14) is characterized in that the tubing treatment is made of a heat-resistant material in order to prevent the toner from the surface of the heating roller 10 to adhere to the surface of the compression roller (12) Paper-paper static eliminator for photo processor. 3. The recording paper static eliminator of claim 2, wherein the tubing layer (14) is tubed with Teflon material.