JPS58153957A - Method and device for image recording - Google Patents

Abstract

PURPOSE:To form a toner image on a photoconductor layer without corona charging, by bringing the photoconductor layer and a toner layer into contact with each other and exposing an image while applying an electric field. CONSTITUTION:A magnetic roller 5 holding a toner 13 as a layer 4 is brought into contact with a photosensitive drum 20, and a voltage 9 is applied between them. The image is exposed to a photoconductor layer 1 through a transparent supporting material 3 and a transparent electrode of the drum by a light emitting diode array 6 on the inside of the drum. A current is flowed to a part, which is irradiated with the light, of the photoconductor layer 1, and the toner in the toner layer 4 in this part is charged and is transferred to the surface of the photosensitive drum 20 by the electrostatic force. This toner image 17 is transferred to copy paper 18. Since the toner on the photosensitive drum 20 including the toner which is not transferred and the remainder is recovered into the toner layer 4 on the magnetic roller 5, a cleaning means is unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for forming a toner image on plain paper using an optical image as a signal, and an apparatus for using the method.

Conventionally, toner is used to print the number IIk'j5. The methods included electrophotography and electrostatic recording. These are excellent methods of decoding, and each is used in copying machines, facsimile machines, etc. However, each has the following drawbacks. - E is an electrophotographic method in which a toner image formed on a photoreceptor is transferred onto plain paper, and several corner chargers and a photoreceptor tallying device for repeated use of the photoreceptor are used. The equipment is complex and requires high voltage. In addition, it is necessary to remove unnecessary toner collected by the tarininder device and to clean and repair the corner charger due to contamination or cutting. For this reason, while consumables costs are at the peak of toner and plain paper prices, equipment maintenance costs are #t
An amount equivalent to P1 is required, and the total cost is nearly twice the price of toner and plain paper.・On the other hand, there are rumors about the electrostatic recording method using electrostatic recording paper with a dielectric layer and a low resistance layer, and the electro-fax method (electronic photography) using photosensitive recording paper with a photosensitive layer and a low resistance layer. Since the photoreceptor is not used repeatedly, a cleaning device is not required, but the price of 11 sheets of 4N recording paper is lower than that of plain paper.
s degree, so the overall cost will be more than that [there is a drawback that the cost will not be cheaper].

This invention was made to solve these drawbacks, and although it is a device that forms a toner image on folded paper, it does not require a tarry end device and does not require the conventional electrophotographic method. The object of the present invention is to provide a brass recording method that does not require a uniform charging process using a course charger, which is required by the law, and a device used therefor. The invention will now be explained with reference to the drawings.

The first garden is af! This is a sectional view showing the photoreceptor 2G, the electrically conductive and magnetic toner layer 4, the counter electrode layer, the exposure system 21, and the like. The photoreceptor 2. has a photoconductor layer 1. Transparent conductive layer 2
．． It consists of a transparent support 3. The exposure system 1 consists of a light emitting diode array 1 and a self-focusing lens T sold under the trade name Cell 7 Otsuta.
Individual light emitting diodes on a light emitting diode array $10
The individual toner particles in the toner layer 4 are imaged on the photoconductor layer 1 by the self-focusing lens TK, and are attracted in the direction of the counter electrode S by magnetic force or the like. to create an electric current between the counter electrode S and the transparent conductive layer 20.
When s is connected and a voltage is applied, a current flows through the conductive toner layer 4.

FIG. 2 is a simple diagram of the equal 111 road map, where R8°R and 4. electrical resistance of the photoconductor layer 1;
C is the capacitance of the photoconductor layer 1, and vle and VH are the capacitances of the toner layer 4, respectively. It represents the voltage distributed across the photoconductor layer IK.

'::: The external voltage applied by the power supply 1 is expressed as V.

31st! ll represents this on a graph.

At am where the light is irradiated, the electrical resistance R2 becomes small, so the current port becomes one large. On the other hand, in a dark area where no light is irradiated, the electrical resistance R1 is large, so the amount of current is small. Therefore, the amount of current flowing through the toner layer 4 can be controlled by controlling the electric resistance R17 according to the amount of irradiated light during exposure.

Therefore, the toner in the vicinity of the photoconductor layer 1 irradiated with light is charged as shown in the first @. On the other hand, the light s
In the area where there is no voltage, the electric charge R1 is extremely small, so that the toner is not rapidly charged.

Further, on the photoreceptor 20 in the irradiated portion, the fourth g (
Image charges 12 of opposite polarity to the charged toner 11 as shown in Hatake) or (b) are generated, and an electrostatic attraction force acts between the charged toner 11 and the photoconductor zoof! No. 411(a).
When the resistance is large, No. 411 (b) is a small case.
The charge is retained for a certain amount of time. When the attraction force acting between the charged toner 11 and the image charge 120 is larger than the attraction force between the toner and the counter electrode S (due to energy etc. in 1), the counter electrode S
When the charged toner 11 is removed from the surface of the photoreceptor 20, the charged toner 11 is removed from the surface of the photoreceptor 20 K11l. As a result, only the toner corresponding to the light-exposed area, that is, the area where the ``light photodiode'' 10 is generated, remains, and one toner group is formed on the surface of the photoreceptor 20. As a means of attracting the toner to the counter electrode S side, it is possible to mix iron powder or the like into the sinner to make it magnetic and use magnetic force, but it is not necessarily necessary to have magnetism.In that case, the counter electrode The attraction force to S will be given by other forces.

Although the case where a light emitting diode array is used for irradiation of the light book is shown, it is of course possible to use other light sources such as a laser light source.

The irises 5 are an example of this device, in which the photoreceptor 20 is configured in the shape of a drum, and a light emitting diode F array 6 and a self-focusing lens 1 are arranged inside the photoreceptor 20. [
13 is Toner Yuyu. The counter electrode S has a cylindrical shape around a stone-shaped fixed roller 14, and constitutes a sleeve of the magnetic brush developing device 4.

This is done around the magnet roller 14 in the direction of the arrow 1s.
11, the toner is supplied to the surface of the photoreceptor 2.

An exposure system 21 for exposing the photoconductor is arranged inside the photoconductor 2, and an image is formed by a self-focusing lens 1 onto a photoconductor layer 1 of a light emitting diode array.

While rotating the drum-shaped photoreceptor 2 in the direction K11 of the arrow 16, a voltage is applied to the sleeve that acts as an anti-flesh aS by the power supply. Since the opposite electric machine SK is magnetically pulled by Klk 14, toner does not adhere to the photoreceptor 2 in the dark area. On the other hand, when light irradiation is performed by the li party diode array @, tt-4tltL, CM□,. Yomu□
, Yu.

As a result, a toner image 1T is formed on the photoreceptor 20.

This is copied and fixed onto the brass paper 11 and a brass painting is obtained. 1- is a conductive transfer roller for transferring the toner image 11 on the photoreceptor 20 onto the recording paper 1@;
A voltage is applied by a power source 31 between the transparent conductive layer 2 and [
This is a means for attracting and transferring the toner onto the recording paper 1.

Note that after the toner image IT is transferred to the recording paper II, the toner remaining on the photoreceptor 20 is removed from the drum-shaped photoreceptor 20.
During one rotation, most of the charged charge is discharged and the attraction force becomes smaller, so it is removed by the next step. Also,
Instead of fixing the magnet ruler 14 and rotating the counter electrode S (sleeve) in the direction of the arrow 1s, the F-ner supply means 1 fixes the counter electrode 1i1 (sleeve) and rotates the magnet ruler 14. May be rotated or transferred--
In place of La 1■: 1-S charger may be used.
h-long.

FIG. 6 shows another embodiment of the image recording device of the present invention, in which the photoreceptor 20 has a conductive layer 2 on a transparent support sQ made of, for example, a polyester film, and a transparent support made of an organic material. The photoconductor layer 1v is formed into a sheet-like structure, and a laser beam is used as the exposure moon light source s2.

Next, to give an example of specific numerical values, in the 1st II, the sleeve of the magnetic brush developing machine (counter electrode 11S) containing conductive toner tM for electrostatic recording and the transparency of the photoreceptor 1. While applying a DC voltage of wOV between the conductive layer 1, the photoconductor 281 was passed under the magnetic brush developing device 4.(1s, **>).
When the toner was irradiated with light from the back side of the photoreceptor 2 during contact with the photoreceptor, the donor adhered to the pot, but when the toner was not irradiated with light, the toner did not adhere to the photoreceptor 20.

When the toner 111 thus formed was passed again under the magnetic brush developing device 4 without exposure to light while applying a DC voltage, the toner disappeared from the eyelid. This shows that the unnecessary toner that is present on the upper K11l of the photoreceptor 2 after plate printing is removed to the IK image in the next step, and even if there is no tarry ender, it will not become the I5- image repeatedly. ing.

In the above-mentioned 1LWi4, it was observed that a conductive toner with a CI component is used as the toner, but it is also possible to use a two-component developer.For example, the toner is insulating and the carrier is conductive. , the potential of the carrier in contact with the photoreceptor 20 changes between bright and dark areas, and the adhesion of toner changes accordingly.

In addition, although the application of an electric field between the transparent conductive layer and the counter electrode S and the exposure to light are performed at the same time as shown in row 5, it is not necessarily necessary to apply the electric field at the same time. The body layer 1 retains the effect of photolithography exposure for some time41
If the material has continuous photoconductivity, an electric field may be applied within that time range.

As mentioned above, this invention performs the exposure at the same time as or directly after exposing the photoreceptor.
There is no need for uniform charging as in the Carlson method, and therefore a high voltage is involved.
- Does not require charging s1.

In addition, since the magnetic brush developing device also serves as a cleaning device S, a special tally and secondary mechanism is required to remove residual toner on the photoreceptor after transfer. There is no need to process collected toner through cleaning, and maintenance work is simple.

Furthermore, since it is possible to accommodate a means for exposing the IIK light image within the photoreceptor, there are four advantages in that the cleaning mechanism is not required and that the apparatus is more compact.

[Brief explanation of the drawing]

Rattan 1 diagram is an example of this example of the painting method.
4. Tameno-cut wm1mzs is the equivalent of Figure 1.
The illustration is irises! A current waveform diagram for the equivalent operation view of the diagram,
The 4th cabinet (a) and (b) are also operation explanatory diagrams, JIlm
1 is an abbreviation for the configuration of an embodiment of the image recording device of the present invention.
, Figure 6 is a simplified diagram showing an example of this development. In the figure, 1 is a photoconductor layer, 2 is a cross-conductive layer, 3 is a transparent support, 4 is a toner layer, '1 is a counter electrode, * is a light emitting diode array, 1 is a 1 self-focusing lens, 1st Figure only 82Figure 10 10 10 94Figure (a) (b)vE6Figure 3

Claims (2)

[Claims] (1) Performing optical image exposure on the photoconductor layer, simultaneously or directly bringing the photoconductor layer into contact with the toner layer, and applying an electric field between the photoconductor layer and the toner layer [the above]. An image recording method in which the toner in the toner layer is selectively deposited on the surface of the photoconductor layer to form a toner image. (2) A photoreceptor having a transparent conductive layer and a photoconductor layer provided on a transparent support, facing the photoconductor layer [a counter electrode to be arranged, and a relation between the photoconductor layer and the counter electrode]. means for supplying toner; means for applying an electric field between the transparent conductive layer and the counter electrode to perform optical writing exposure from the transparent support side; and applying a force to attract the toner to the counter electrode. (1) A brass scissors holder comprising a means for selectively depositing the toner on the photoreceptor to form a visible image.