JPS58104769A - Recorder for picture - Google Patents

Abstract

PURPOSE:To prevent clogging in an opening, and to record a picture stably by intensifying an electric field between a controlling member and a picture receiving body when charged particles are not controlled in the device which forms the electric field in the opening, controls passage through the opening of charged particles and obtains the picture. CONSTITUTION:When AC voltage is applied to an AC power supply 8 between a base electrode 3 and a toner carrying member 7, a toner 11 is stirred between the base electrode 3 and the toner carrying member 7. When voltage is applied to a signal electrode 1 and the base electrode 3 from a signal power supply 10 at that time, the toner 11 stirred passes through an opening section 4, and is attracted to the signal electrode 1. The toner 11 is further accelerated and adheres on a recording member 5 because DC voltage is applied between the back electrode 6 and the base electrode 3. When the picture is not recorded, the toner detained in the opening can be extracted by the force of the electric field by applying voltage higher than voltage in case of recording between the back electrode 6 and the base electrode 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention utilizes an electric field generated in nine rows of independent or slit-shaped apertures to form an electric field in the apertures (particularly by an electric signal) to generate charged particles. This is a book about a device that allows images to be captured by controlling the passage through the apertures of a stone.

Conventionally, this GO direct recording technique has been proposed in US Pat. No. 3,689,935. In this method, two electrodes are provided with an insulating layer interposed between them, and a row of holes are formed in the electrodes (hereinafter referred to as a control member).This control member controls the passage of charged toner. , an image is obtained by the toner that has passed onto a recording material provided on the side opposite to the toner supply source. However, in this conventional method, the toner is not supplied uniformly, which tends to cause unevenness in the image on the recording member, making high-speed recording difficult, and problems such as clogging of the toner control member occur, making it practical. has not been standardized.

The purpose of the present invention is to solve the problem of the above-mentioned conventional example in that the opening of the control member is blocked and subsequent charged particles cannot be controlled well, and at the same time, it is possible to form stable isi* for a maximum period of time. The aim is to provide equipment that makes it possible.

To achieve the above object, the present invention includes a charged particle generation source, a control member having an opening through which the charged particles pass and controls the passage of loaded particles, and a control member for controlling the passage of charged particles from the charged particle generation source toward the control member. means for generating an electric field to move the charged particles; and means for moving the charged particles from the control member to the favorite typeface.

When the charged particles are not controlled, the two-image recording device changes the electric field between the control member and the injured body in a direction that strengthens it.

The above-mentioned charged particles include charged toner and corona ions, and the control member is a pace electrode that has an opening through which the charged particles pass and is maintained at a constant potential through an insulating layer, and this pace electrode. A device having a signal electrode to which a different potential is selectively applied to each aperture position can be used.1 Hereinafter, one embodiment of the present invention will be described as a device that controls the passage of charged toner to form a recording. will be explained using the drawings as an example. " FIG. 1A is a plan view showing the configuration of a control member applicable to the present invention, and FIG. 1B is a sectional view taken along line I-I in FIG. 1A.
FIG. 2 is a configuration diagram showing an embodiment of self-forming using the control member as shown in FIG. 1;

In Fig. 1, 1 is a signal electrode that can be applied with a voltage independently, 3 is a pace electrode that is grounded or to which a constant potential is applied, and is continuous over all or a plurality of holes; The signal electrode 1 and the base electrode 3 are electrically insulated by an insulating member. Reference numeral 4 denotes a hole which penetrates through the signal electrode 1, the pace electrode 3, and the insulating member 2.

The basic operation of the present invention will be explained using FIG. 2. In the figure, 6 is a back electrode, and 5 is a recording member which is a wounded body, and this member 5 is in close contact with the back electrode 6. 7 is a toner conveying member made of a non-magnetic material, and 11 is a one-component insulating magnetic toner, which is a charged particle, and uniformly distributed on the toner conveying member 7.
11lk cloth. The control member 1 described in FIGS. 1A and 1B is arranged between the back electrode 6 and the toner transport member 7, and the back electrode 6 and the signal electrode 1 are opposed to each other, and the toner transport member 7 and the pace electrode are facing each other.

Further, reference numeral 8 connects an AC power source to the pace electrode 3 and the toner conveying member 7. 9 is a DC power supply connected to the back electrode 6 and the pace electrode 3. IO is a signal power supply, which is connected to the signal electrode 1 and the pace electrode 3.

In the above configuration, when an AC voltage or an even-odd DC voltage is applied between the pace electrode 3 and the toner transport member 7 by the AC power source 8, 1. - The toner 11 on the conductive material 7 is moved by the pace electrode 3 and the toner transport member 7. At this time,
When a voltage is applied to the signal electrode 1 and the pace electrode 3 from the signal power source 10, the toner 11 which is moving is attracted to the signal electrode 1 through the aperture 4. Furthermore, since a DC voltage is applied from the DC type #9 between the back electrode 6 and the base electrode fi3, the toner 11 is further accelerated and the recording member 5
Attach to.

When there is no signal voltage from the signal power supply 10 to the signal electrode 1 and the pace electrode 3, or when an electric field in the opposite direction is applied,
The dynamic toner does not pass through the apertures 4. Further, in the pace electrode 3 and the toner conveying member 7, the toner moves back and forth due to the action of AC voltage, and at the same time has a cleaning effect. As described above, when a signal is applied to the signal electrode 1 in an image-like manner, an image of a toner image is formed on the arrangement member, and then the toner image is fixed on the recording member 5 by heating or pressure.

Note that if the toner particles 11 have negative polarity (→ have an electric charge), the polarity of the voltage supplied from the signal power source 10 is negative (→, positive (+) to the signal electrode 1, and positive (+) to the signal electrode 1 from the signal power source 10. The supply voltage polarity should be negative (→) for the pace electrode and positive (+) for the back electrode 6. Although the ground potential can be placed anywhere, the base electrode is usually grounded. 11f) If the #A property is positive (+), the above-mentioned polarity is reversed.

However, if the control electric field disappears while the toner is passing through the apertures 4, the toner may adhere to the walls of the apertures, especially if the toner does not have a sufficient potential. There is. Also, dust floating in the air may adhere to the vicinity of or inside the opening. It is highly unlikely that such particles and dust would adversely affect the subsequent toner modulation.

This problem also occurs when the charged particles are ions,
In this case, the material that clogs the apertures may be dust or toner floating within the device.

FIG. 3 shows a sectional view of a recording apparatus to which the present invention is applied to solve the above problem.

In the figure, a signal 1 to which a signal voltage in the form of a 12F signal is applied is a pole, 13 is a pace electrode, and 14 is an insulating member that electrically insulates the signal '#'2 and the pace electrode IM13. This system#
The member 15 is a means for conveying the toner to a rounded part through which the toner passes through an opening. The toner 20 in the toner container 19 of this means is a one-component magnetic insulating toner, which is rotated in the direction of the arrow. There is a toner conveying member 21 made of a magnetic cylinder.

Inside this toner conveying member 21, there is a magnet 22 that is fixed and magnetized with alternating pressure "1"-magnets of different polarity.
When the conveyance member 21 rotates in the direction of the arrow due to the action of the magnetic field of the doctor blade 23, the toner 20 conveyed by the doctor blade 23 is uniformly formed into a water slag layer.

The toner that has reached the recording position 24 reciprocates between the pace electrode 13 and the toner transport member 21 due to the action of an electric field caused by an AC voltage applied between the pace electrode 13 and the toner transport member 21 from the AC power supply 25. . And signal power supply 2
6 is connected to the signal electrode 12 and the pace electrode 13;
A DC voltage is applied to the pace electrode 13 and the back electrode 16 by a DC power supply 27 . Then, in the state where the toner is in reciprocating motion as described above, the image signal is applied to the signal electrode 12 and the pressure is applied, so the toner is further accelerated and transferred to the recording member 17.
The recorded image is formed.

FIG. 4 is an enlarged sectional view of the recording apparatus for explaining the behavior of toner in the apparatus shown in FIG. 3.

1. The gap between the back electrode 16 and the control electrode 16 can be set in a range of 10 from about 100 microns.1 In this embodiment, it is about 500 microns, and there is an IM current power source between the back electrode and the pace electrode. A DC voltage of 700 cm is applied from 16 to 16. An alternating current voltage of 1.4 ff and 4.5 hertz is applied to the pace electrode and the toner transport member from an alternating current power supply 14.
The gap is set to 600 nm. Note that the frequency of the voltage 1 depends on the linear velocity of the fIks material in the gap.

The control electrode and pace electrode are kept at a gap of 25 microns by an insulating member, and the signal power supply provides the +
A pulse signal voltage of 120 V can be applied.

In the condition setting described above, when the toner is charged with a load, the signal electrode and the back electrode 16 apply a positive voltage to the pace electrode 13, and when the toner 9 has a positive polarity, the opposite voltage is applied. Apply polarity.

The diameter of the control member apertures 15 was 150 microns, and toner having an average diameter of 13 microns was used.

When recording is performed by moving the recording member 17 in the direction of the arrow 4-5 under the above setting conditions, when the 1N voltage is not applied between the recording signals, the toner that has entered the aperture is controlled. It stays in this hole and adheres to the hole wax, base electrode, and signal electrode. Some of the toner contained in the round band device is small, and the toner accumulates in these apertures, contaminating the signal electrodes, and eventually blocking the apertures and reducing the electric field caused by the signal electrodes. Due to this weakening, image recording becomes impossible.

FIG. 5 shows a waveform diagram applied to each electrode 5, showing an embodiment for solving the above-mentioned problems.

FIG. 5A shows waveforms when the present invention is not applied, where the signal waveform from the signal power source 27 is Al and the waveform from the DC power source 26 is As. On the other hand, FIG. 5B shows waveforms used to explain the present invention, where the waveform from the signal power source 27 is 81+the waveform from the DC power source 26 is B snow. In both figures, time C is the time when the painting is not recorded and D is when the painting is recorded.

As shown in FIG. 5B, by applying a high voltage in the direction of attracting toner to the recording member side when not recording, the toner traveling inside the opening can be taken out by the force of the electric field, and the above problem can be solved. & IT Noh. Note that if a tortoise pressure is applied to the recording member at the time, it becomes impossible to form a control electric field within the aperture by applying a signal voltage to the signal electrode.

Furthermore, in order to increase the toner suction effect toward the recording member, it is possible to cut off the supply of toner by stopping the supply voltage from the AC power supply 25 or stopping the toner conveying member 16 in C during non-grain recording. Complete cleaning becomes possible, and stable image formation over a longer period of time becomes possible.

In the embodiment shown in FIG. 3, the toner removed from the openings may be received by the recording member, or may be received by the back electrode and then taken out by the back surface of the recording member. Since the amount of toner that remains in such openings is extremely small,
The method described above can be used.

FIG. 6 is a sectional view of the device showing another embodiment.

In this embodiment, instead of the plate-shaped back electrode shown in FIG. 3, a roller-shaped back electrode having a cleaning member is provided. The above configuration makes it easy to use the cut sheet, and furthermore, the recording member is not contaminated by toner removed from the apertures.

Incidentally, parts common to those in FIG. 3 are given common numbers.

In the figure, reference numeral 28 denotes a roller-shaped back electrode, and in order to attract the recording member, an insulating layer may be provided on the surface and the electrode may be charged, or suction air may be applied.

The row 2-28 rotates at the same speed and in the same direction as the cut sheet-shaped recording member 29 in terms of circumferential speed.

30 is a cleaning blade that comes into pressure contact with the curved surface. 3
1 is a microswitch that detects the presence or absence of a recording member, and a DC power supply 26. AC power supply 25. Conveying member 210 is used to control a drive system (not shown).

In this embodiment, the presence or absence of the recording member is determined by a micro switch 31.
If there is a recording member, the + from the DC power supply 27 is detected.
700V voltage is supplied, and if there is no voltage, +1800VK is switched, and AC power supply 25. Conveyance: i' Stop the drive system of the member 21. At this time, the back power 28
Ha Yurokubu □ Zaimon, Gaso. On top, there is an opening.

Since it is stained by toner removed from the vicinity, by scraping the toner off the circumferential surface of the roller 28 with the cleaning blade 30, it is possible to prevent stains on the recording member, etc., and it is possible to record stable images without stains over a long period of time. Become.

By the way, in the above embodiment, a cleaning blade is used as a means for removing toner from the row 228.
This can be replaced by web means such as paper, textiles, etc., and others can also be used. Although a microswitch is used to detect the presence or absence of a recording member, a combination of photoelectric elements, a combination of ultrasonic waves, or a control signal of a microcombinator may also be used.

However, it is of course possible to apply an alternating voltage. In this case, the direction of the electric field between the toner source and the image receptor must match the direction of the electric field between the image receptor and the control member. In a device that uses such an electric field, even if the alternating voltage applied to the image receptor is biased toward the side that attracts toner only during non-recording, the control member It is also possible to generate an electric field in which charged particles such as toner are directed toward the image receptor side within the aperture by applying a voltage from a signal power source, and at the same time stop the applied voltage between the charged particle generation source and the control member. Effective in removing particles.

Further, when the charged particles are toner, if magnetic toner is used and transported under a magnetic field as in the embodiment, it is possible to easily form a thin toner layer and to prevent toner scattering. but,
The toner does not need to be magnetic if it is formed on the edge surface or is carried on a brush with flocked hairs of A3 to IW size.The image receptor is made of an insulated drum. However, even if the formed toner image is transferred to another recording member, it will not be removed.If the member that closes the openings is dust, etc. that does not have a specific potential, the toner image may be determined by taking into account the charging characteristics of this dust. There is no problem because the electric field caused by the high voltage moves the light to the image receptor side regardless of the polarity.

[Brief explanation of the drawing]

FIG. 1A is a plan view showing an example of a control member, FIG. 1B is a sectional view taken along the line I-I of FIG. 1A, FIG. 2 is a principle explanatory diagram showing an example of controlling charged particles, and FIG. is a sectional view of an embodiment of the present invention,
4 is an enlarged sectional view of the control position, FIGS. 5A and 5B are waveform diagrams of applied voltages, and FIG. 6 is a sectional view showing another embodiment of the present invention. 12 is a signal electrode; 3.
13 is a base electrode, 4.15 is an opening, 5.17 is a recording member, 6.16 is a back electrode, ←, 21 is a toner conveying member,
8.25 is AC power supply, 10.27 is signal power supply, 9.26
indicates a DC power supply. Applicant: Canon Co., Ltd. 35 zo″ !゛, /F′--, 2 =(, /4

Claims (2)

[Claims] (1) A charged particle generation source, a control member having an opening through which the charged particles pass and controlling the passage of the charged particles;
It has means for generating an electric field that moves charged particles from the charged particle generation source toward the control member, and means for moving charged electrons from the control member to the image receptor, and when the charged particles are not controlled, the control member and the image receptor A device that changes the electric field between the body and the body to strengthen it. (2) An electric field is formed in the aperture of the control member in the direction of accelerating the charged particles even when the control member is not controlled.
The image recording device according to item 1).