JPH0495988A - Image forming device - Google Patents

Abstract

PURPOSE:To enhance the image quality of a formed output image even if a sensitizing material whose surface is porous is used by thermally melt-sticking a recording medium for which a transparent thermoplastic dielectric material is used, for forming a visual image, to an output sheet. CONSTITUTION:A transparent sheet 101 is the recording medium for which the transparent thermoplastic dielectric material is used, for instance, a laminate sheet that a polyethylene telephthalate film is coated with styrene acrylic resin is used. Thus, the recording medium 101 is held on a photosensitive body 3 on which an electrostatic latent image is formed, and the visual image by coloring toner is formed on the recording medium by a developing device 6 visualizing the electrostatic latent image with coloring toner. After that, heat is added to the recording medium 101 on which the visual image is formed, the recording medium showing thermoplasticity is melt-stuck to the output sheet 105. Thus, even if the sensitizing material whose surface is porous, but which have excellent image expressivity is used, toner for forming an image is prevented from being left on the photosensitive body without being transferred, and an excellent image is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention forms an electrostatic latent image on a photoreceptor, and forms a visible image using charged colored toner from the formed electrostatic latent image. The present invention relates to an image forming apparatus.

[Prior Art] Conventionally, this type of image forming apparatus has had a configuration as shown in FIG. The photosensitive drum 1 has a photosensitive layer 3 made of a photosensitive material uniformly formed around an exposure drum 2 whose surface is covered with a conductor. A charger 4, an exposure device 5, a developer 6, a transfer roller 7, a static eliminator 8, and a cleaner 9 are arranged around the drum 1 in this order in the rotational direction of the drum 1.

The developing device 6 has a developing electrode 11 on the left side and a squeeze roller 12 on the right side, and liquid colored toner 40 is stored inside.

The operation of the conventional example having the above configuration will be explained.

The photosensitive drum 1 rotates, and an electrostatic latent image is formed on the photosensitive layer 3 by a charger 4 and an exposure device 5. When the latent image approaches the developing device 6, charged liquid colored toner 40 is supplied onto the developing electrode 11, and the liquid colored toner 40 comes into contact with the electrostatic latent image on the photosensitive layer 3, and the electrostatic latent image is The electrostatic latent image is developed into a visible image using coloring toner 40. After development, the squeeze roller 12 removes excess colored toner 40 remaining on the photosensitive layer 3.

The toner image 41 reaches the transfer roller 7 as the photosensitive drum 1 rotates. At the position of the transfer roller 7, an output paper 21 for outputting an image is waiting in advance. The output paper 2
1 is pressed onto the toner image 41 on the photosensitive layer 3 by the transfer roller 7, and the toner image 41 is transferred to the output paper 21.
transcribed into.

The output paper 21 to which the toner image 41 has been transferred is delivered to the paper ejection roller 2.
2, the paper is ejected.

The photosensitive drum 1 continues to rotate, and the residual charge on the photosensitive layer is removed by the static eliminator 8. Next, residual toner on the photosensitive layer 3 is removed by a cleaner 9. Images were formed in this way.

[Problems to be Solved by the Invention] However, in the above-mentioned image forming apparatus, when a photosensitive material (for example, Ti02) with a porous surface and excellent image expression characteristics is used, the following problems occur. There was a problem.

High image quality can be obtained from the toner image formed on the photosensitive layer. However, since the surface is porous, the fine pores on the surface become clogged with toner particles, resulting in toner remaining on the photoreceptor during transfer. For this reason, the formed toner image is not completely transferred to the output paper, resulting in a decrease in the quality of the output image.

The present invention has been made in order to solve the above-mentioned problems, and is an image forming method that improves the quality of the output image formed even when a photosensitive material with a porous surface is used, and can always form a good image. The purpose is to provide equipment.

[Means for Solving the Problems] In order to achieve this object, the image forming apparatus of the present invention has the following features:
A recording medium using a transparent thermoplastic dielectric material that is held on a photoreceptor on which an electrostatic latent image is formed and forms a visible image on the surface with charged colored toner; The apparatus further includes a heat fusing means for heat fusing the printed recording medium to an output sheet.

[Function] In the present invention having the above configuration, a recording medium made of a transparent thermoplastic dielectric material is held on a photoconductor on which an electrostatic latent image is formed, and the electrostatic latent image is covered with a colored toner. A visual developing device forms a visible image using colored toner on a recording medium.

After that, heat is applied to the recording medium on which the visible image is formed,
The thermoplastic recording medium is fused onto the output paper.

[Example 1] Hereinafter, an example embodying the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of this embodiment.

Components in the drawings that are similar to those in the conventional example are designated by the same numbers, and their explanations will be omitted.

A charger 4, an exposure device 5, a developer 6, and a static eliminator 8 are arranged around the photosensitive drum 1 in this order in the rotational direction of the drum 1. Below the exposure device 5 is a sheet conveying roller 10 that conveys a transparent sheet 101 and brings it into contact with the photosensitive drum 1.
2 is placed.

That is, in this embodiment, the sheet conveying roller 102
constitutes the recording medium insertion means. In addition, transparent sheet 1
01 is a recording medium using a transparent thermoplastic dielectric material, such as a so-called laminate sheet, which is a PET (polyethylene terephthalate) film coated with styrene acrylic resin.

Below the static eliminator 8 is a transparent sheet 10 on which a visible image is formed.
A peeling claw 103 for peeling the transparent sheet 101 from the photosensitive drum 1 is disposed, and a sheet discharge roller 104 next to the peeling claw 103 for conveying the transparent sheet 101 peeled off by the peeling claw 103 is arranged.
is located.

That is, in this embodiment, the peeling claw 103 and the sheet discharge roller 104 constitute a recording medium peeling means.

A paper conveyance roller 106 is arranged on the right side of the sheet discharge roller 104 to convey plain paper 105 for image output and press it against the transparent sheet 101 on which the visible image is formed.
Further, on the right side thereof, there are arranged a heating roller 108 heated by a heater 107, and a pressure roller 109 which applies pressure by sandwiching the transparent sheet 101 and plain paper 105 between the heating roller 108. That is, in this embodiment, the heater 107, the heating roller 108, and the pressure roller 109 constitute a thermal fusing means.

Next, the operation of this embodiment will be explained.

First, the photosensitive drum 1 rotates, and a charger 4 is placed on the image forming area.
performs uniform charging. Next, exposure device 5 or photosensitive drum 1
An electrostatic latent image is formed on the photosensitive layer 3 based on image information. When the photosensitive layer 3 on which the electrostatic latent image is formed reaches the position of the sheet conveying roller 102, the transparent sheet 101 is conveyed by the sheet conveying roller 102, and the electrostatic latent image formed on the photosensitive layer 3 is removed. wrapped on top.

When the wrapped transparent sheet 101 reaches the position of the developing device 6, the colored toner 4 of the liquid stored in the developing device
0 is supplied onto the developing electrode 11, resulting in a state as shown in FIG. The charges forming the electrostatic latent image are distributed on the photosensitive layer 3, but as described above, since the transparent sheet 101 is a recording medium using a thermoplastic dielectric material, the transparent sheet 101
induces dielectric polarization within. The induced dielectric polarization is
Since it follows the electrostatic latent image formed on the photosensitive layer 3, the electrostatic latent image is substantially moved from the surface of the photosensitive layer 3 to the surface of the transparent sheet 101. Here, the transparent sheet 101 is immersed in liquid colored toner 4o supplied onto the developing electrode 11, and the colored toner 40 is electrostatically attracted to an electrostatic latent image generated by dielectric polarization on the surface of the transparent sheet 101. to form a visible toner image on the transparent sheet 101.

The transparent sheet (101) on which the visible toner image has been formed further rotates together with the photosensitive drum 1, is peeled off from the photosensitive drum 1 by the peeling claw 103 at the position of the peeling claw 1.3, and is moved in the discharge direction by the sheet discharge roller 104. transported to.

When the transparent sheet 101 eventually reaches the position of the paper conveyance roller 106, the transparent sheet 101 is overlapped with the plain paper 105 so as to sandwich the visible toner image therebetween, and is further moved to the position of the heating roller 108. transported.

The heating roller 108 has been heated by the heater 107 by this time, and the transparent sheet 101 and the plain paper 1
05 is conveyed, it is sandwiched between the pressure roller 109 and the transparent sheet 101 and plain paper 105 are heated and pressed together. As mentioned above, since the transparent sheet 101 is a recording medium using a thermoplastic dielectric material, the heating roller 108
, and pressure roller 109, the transparent sheet 101 is melted by the heat and fused to the plain paper 105, completing an output image.

The completed output image, that is, the transparent sheet 101 fused onto the plain paper 105 with the visible toner image sandwiched therein, is as follows:
The paper is discharged by the heating roller 108 and the pressure roller 109.

The photosensitive drum 1 continues to rotate, and the residual charge on the photosensitive layer is removed by the static eliminator 8. In this way, an output image is formed.

Note that the output image formed in this way is printed on plain paper 1.
A visible toner image is formed on the surface of 05, and the transparent sheet 101 is fused to cover the visible toner image, so the surface has a good gloss and the visible toner image is protected by the transparent sheet 101. It also has the advantage of being present.

[Effects of the Invention] As is clear from the detailed description above, according to the present invention, even when a photosensitive material with a porous surface but excellent image expression characteristics is used, the toner for forming an image can be easily outputted. It is possible to provide a color image forming apparatus that can always maintain high transfer efficiency and output good images without being transferred to paper and remaining on the photoreceptor.

[Brief explanation of drawings]

1 to 2 show embodiments embodying the present invention; FIG. 1 is an overall configuration diagram, and FIG. 2 shows an embodiment of the present invention.
FIG. 2 is an enlarged operational diagram of the vicinity of the developing device. Further, FIG. 3 is an overall configuration diagram of a conventional example. In the figure, 3 is a photosensitive layer, 101 is a transparent sheet, and 1
02 is a sheet conveyance roller, 103 is a peeling claw, 104 is a sheet discharge roller, 105 is plain paper, 106 is a paper conveyance roller, 107 is a heater, and 108 is a heating roller. , 109 is a pressure roller.

Claims (1)

[Scope of Claims] 1. In an image forming apparatus that forms an electrostatic latent image on a photoconductor and forms a visible image using colored toner charged from the formed electrostatic latent image, the electrostatic latent image is A recording medium using a transparent thermoplastic dielectric material held on a photoreceptor and forming a visible image on the surface by charged colored toner; and the recording medium on which the visible image is formed. An image forming apparatus characterized by having a heat fusing means for heat fusing to an output paper.