JPS6022145A - Image forming method - Google Patents

Abstract

PURPOSE:To enable transfer to ordinary paper in an electric field, to make a corona discharge means unnecessary, and to enable polychromatic recording by using developer prepd. by mixing an electrically conductive magnetic carrier with an insulating toner. CONSTITUTION:A developing device is composed of a magnet 6' and a hollow cylindrical member 5' for transferring a toner, and a developer consisting of an insulating toner 14 and an electrically conductive magnetic carrier 13 is used. A recording medium 11 composed of a transparent electrode substrate 1 and a photoconductor 2 is set at the recording position 12. At a part C irradiated with light 9, voltage applied from a power source 10 reach a position close to the developer through the layer 2. The toner 14 is positively charged, and the carrier 13 is negatively charged, yet since the carrier 13 is electrically conductive, positive charges are injected through the member 5' to cancel the negativity of the carrier 13. The toner 14 is made easily separable from the carrier 13, and the part C attracts the toner 14 to stick it. The carrier 13 is attracted by the magnet 6', so it does not stick to the medium 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image recording method, and more particularly to an image recording apparatus that forms an image by depositing toner directly onto a ζζ recording medium in response to an image-like light.

Conventionally, as this type of iir@ recording device, U.S. Patent No. J,
There is one disclosed in No. t/A, tl 0.

FIG. 1 shows such a conventional image recording device. The transparent electrode substrate l may be formed by depositing indium tin oxide (gold) on a Mylar film, or by using an organic transparent conductor and depositing a photoconductor thereon, for example, by depositing gold on a Mylar film.
S, ZnO, Be, etc. are applied or vapor-deposited to form a recording medium. Developing device Jj'11-ner storage container da storage container-
Inside the container tray, there is a stationary toner conveying member S and a toner conveying member, which is usually a conductive non-magnetic hollow cylinder!
It is composed of a rotating magnet 6 contained inside. In the present invention, the explanation is based on the rotation of the magnet 6, but the toner conveying member! If you move the magnet 6 and fix it, the toner conveying member! It is also possible to move the magnets 6 at the same time.

Conductive magnetic toner (hereinafter referred to as toner) 7 is contained in a toner container. The light source S that converts the electrical signal of the image pattern into light can usually be a light source such as a laser, LPID, or a light shutter such as PLZT or liquid crystal, and it is also possible to use a lens (not shown) to convert the light reflected from the document into light. Direct irradiation is also possible.

When the magnet 6 rotates in the direction of arrow A in FIG. The toner is irradiated onto the photoconductor of the transparent electrode substrate 11 on the back side of the recording medium it, and the toner adheres to the photoconductor of the recording medium. Also, if there is no light beam, there will be no adhesion of toner. By moving the recording medium ii in the direction of arrow B and continuously repeating the operation at both speeds, a visible image is formed on the recording medium ii.

FIG. 2 is a diagram for explaining FIG. 1 in more detail, and is an enlarged view of the recording position /J. Note that the same numbers indicate the same functions. Part 0 of Fig. a shows a state in which light 9 is irradiated from a light source S such as a modulated laser generating means, and part D shows a state in which light 9 is not irradiated. As explained in Figure 1, when the magnet 7 rotates in the direction of arrow A, the toner 7 moves in the opposite direction on the toner conveying member S, reaches the recording position 1, and comes into contact with the photoconductor surface. do.

At this time, when the light 9 is irradiated from the light source g to the recording medium // as shown in the 0 part, the toner conveying member 3 and the transparent electrode 1 are connected to the power source io.
Since a voltage is applied between them, charges are injected into the photoconductor a, and the force of the magnetic field generated by the magnet 6 attracts the charges injected into the photoconductor and the charges generated in the toner 7. The force involved is stronger and the toner 7 is deposited on the recording medium ii.
will stick. However, when there is no light irradiation as in section D, no charge is injected into the photoconductor, and toner cannot adhere to the recording medium.

This method is detailed in U.S. Pat. No. 3J/AJ II 0, but this method requires the use of conductive magnetic toner 7, and it is difficult to transfer the toner 7 to plain paper. Not only does it require the use of expensive magnetic powder, but it is also difficult to color the conductive magnetic toner 7, making it difficult to develop the technology for coloring.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming method that eliminates the drawbacks of the conventional methods described above, allows easy transfer to plain paper, allows color copying, and uses inexpensive toner.

In the present invention, a mixture of a photoreceptor having a photoconductive layer written on a transparent conductive substrate, a carrier having conductivity and magnetism, and an insulating toner is held on a developer carrier by a magnet generating means. The photoconductive layer is brought into contact with the photoconductor, and while applying a DC voltage between the base and the developer carrier, information light is irradiated to the photoconductive layer through the base, and the photoconductive layer is placed on the photoconductor according to the bright part of the information light. This is what allows toner to adhere.

Information light is modulated laser beam scanning light, LID
This includes blinking light from each element of the element array, light passed from the light source through the liquid crystal shutter, and image light.

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

FIG. 3 shows an embodiment of the present invention, in which the same numbers as in FIGS. 1 and 2 indicate the same functions. Since the base structure of the present invention is substantially the same as that shown in FIG. 1, only the recording position 72 will be described. The explanation will be given below using specific numerical values used in the experiment.

In FIG. 3, insulating toner/4I and magnetic conductive carrier (hereinafter referred to as carrier) t are used instead of the toner in FIG.
Use a mixture of 3 and 3.

The developing device J has a stainless steel hollow cylinder with a diameter of 3 mm as a toner conveying member 5', and a fixed magnet 6' inside.
are arranged. The electrode of the magnet 61 is connected to the toner conveying member 51.
Above, a surface magnetic flux tSO Gaussian was used. Now, when the toner conveying member r+ is moved in the direction of the arrow A1, the developer is moved in the same direction along the arrow A1 and reaches the recording position l-. At the recording position I, the distance between the recording medium // and the toner conveying member S' is normally 0. Although it is possible to select a distance of /-0 mm, in this experiment it was set to 3 mm).

The transparent electrode substrate 1 is made of a Mylar film of 50 micrometers and evaporated to 1 μm/07m of To, and OaS is used as a photoconductor on the toner conveying member 31 side.
These were used as recording media.

The supply voltage from the power supply IO can be applied as t-1ooov, but in the present invention, it is l! Apply θV, record medium //
Negative polarity was applied to the toner transport member, and positive polarity was applied to the toner conveying member. Now, similar to Figure 1, explaining the 0 part hit by the light t emitted from the light source g, the voltage applied from the power supply 10 is O
It is injected into the aS layer and reaches the vicinity of the developer. The insulating toner/4I of the developer is positively charged, and the carrier 1
3 is negatively charged, but since the carrier 13 is electrically conductive, a positive charge is injected into the carrier 13 through the toner transport member 31, canceling out the negative charge that the carrier 13 has.

The insulating toner 14I easily separates from the carrier 13, and the insulating toner 14t is attracted to the portion of the recording medium l/ that is hit by the light due to the negative charges injected into the photoconductor a. Further, the carrier 13 is a toner conveying member due to the magnetic force generated from the magnetic field generating means 6'! Since it is attracted to the 1 side, it does not adhere to the recording medium //.

Since portion D is not exposed to light, the charge supplied from the power source /θ is not injected into the photoconductor and does not attract the insulating toner 14t.

As described above, by continuously moving the recording medium l/ in the direction of arrow B and continuously applying light from the light source g to the recording medium /l in an image pattern, the image on the recording medium // is visualized. A clear image is obtained.

Spinning speed insulating toner/da is insulated and does not discharge its retained charge, so means such as corona discharge and voltage application to the roller are not shown! Not only can it be transferred to plain paper, but since the insulating toner/4t is non-magnetic, it is also possible to color the toner.
By repeating the process illustrated in the figure multiple times, it is possible to record multiple colors.

As explained above, by using a developer mixture of a magnetic conductive carrier and an insulating toner instead of a conductive magnetic toner, electric field transfer to plain paper becomes possible, eliminating the need for means such as corona discharge and increasing the number of applications. Color recording is also possible.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing a conventional image recording device, FIG. 1 is a vertical cross-sectional view showing the recording position of FIG. 1, and FIG. 3 is a vertical cross-sectional view showing the recording position of an embodiment of the present invention. be. L...Transparent electrode substrate Co...Photoconductor! . 31... Toner transport member 6, 6'... Magnet...
Light source De... Light 10... Power supply /l... Recording medium 1
3...Magnetic conductive carrier /4'...Insulating toner. Patent Applicant Canon Co., Ltd. Agent Arai-be

Claims (1)

[Claims] l A photoreceptor having a photoconductive layer provided on a transparent conductive substrate is used, and a mixture of a conductive and magnetic carrier and an insulating toner is held on a developer carrier by a magnetic force generating means. The photoconductive layer is brought into contact with the photoreceptor, and while applying a DC voltage between the substrate and the developer carrier, information light is irradiated through the photoconductive layer lζ through the patterned substrate, and the information light is applied onto the photoreceptor according to the bright portion of the information light. An image forming method that focuses on attaching toner to the surface.