JPS58104770A - Recorder for picture - Google Patents

Abstract

PURPOSE:To form dichroic picture by controlling a toner with dichroic reversed- polarity charges and the polarity of an accelerating electric field in the device which shapes an electric field in an opening, controls passage through the opening of charged particles and obtains the picture. CONSTITUTION:When AC voltage is applied between a base electrode 3 and a toner carrying member 7 from an AC power supply 10, the positive polarity toner 8 and the negative polarity toner 9 are reciprocated alternately between the carrying member 7 and the base electrode 3. When plus signal voltage is applied to a signal electrode 1 from a signal power supply 12, working passing through the opening 4 functions to the black negative toner 8 because the recording member side is brought to higher potential in the opening 4, and the black toner reaches the recording member 5 and the black picture is formed when the back electrode 6 side is brought to positive potential at potential from an AC power supply 11. The red positive toner 9, on the contrary, reaches the recording member 5 when the signal electrode 1 is brought to minus voltage and the back electrode 6 to the negative side, and the red picture is shaped.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ms recording device that utilizes an electric field generated in independent row-like or slit-like apertures, and in particular, an electric field is formed in the apertures by an electric signal to generate a charged powder developer ( The invention relates to an apparatus for obtaining a two-color image by controlling the passage of toner (hereinafter referred to as toner) through the apertures.

Conventionally, in this type of apparatus, image recording has been performed by applying a Carlson process or electrostatic recording. However, since the process of creating an electrostatic latent image and the development process are required twice, the device becomes complicated and expensive.

An object of the present invention is to solve the above-mentioned problems of the prior art and provide a small and inexpensive device.

The present invention achieves the above object by using two different colors t7).
a charged powder fAgII agent having a potential of opposite polarity, a developer transporting member that holds and transports this developer, and a control member that has an opening through which the developer passes and controls the passage of this developer; an image receptor receiving the developer from the control member, and forming an alternating electric field between the developer transporting member and the image receptor;
The image recording apparatus forms a two-color image on the image receptor by forming an electric field that accelerates toner that is desired to pass through the aperture of the control member under this electric field.

The control member may include a member having an opening through which the developer (toner) passes and consisting of a pace electrode serving as a reference electrode and a signal electrode facing each other with an insulating layer interposed therebetween. A ground potential or a constant potential is always applied to the base electrode of this control member, and a signal voltage having a potential different from that of the pace electrode is applied to one of the signal electrodes. As a result, the electric field generated inside the mouth is used to select whether to pass positive (a) toner or negative (-1 toner).

With the above configuration, different color toners can be selectively generated in the form of lk:gII from a single common device, making it possible to make the device smaller and cheaper.Furthermore, since the toner is generated from a common device, It becomes possible to obtain stable images. Furthermore, since an alternating electric field exists between the toner transport member and the control member, toner reciprocates between the control member and the toner transport member, resulting in a cleaning effect on toner contamination in the apertures and a long-lasting effect. It becomes possible to obtain the best th image over a period of time.

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

Figure 1A is a plan view showing the configuration of the control member applicable to the present invention, Figure 11B is a sectional view taken along line 1-1 of Figure @1A, and Figure @2 is a sectional view of Figure @1. FIG. 2 is a configuration diagram showing an example of image formation using a control member such as the one shown in FIG.

In FIG. 1, 1 is a signal electrode that can be isolated and individually applied with a voltage, and 6 is the reference electrode described above, pace 1! The electrodes are continuous over all or a plurality of electrodes, and 2 is an insulating member that electrically insulates the signal electrode 1 and the pace electrode 6. Reference numeral 4 denotes a hole that penetrates through the signal electrode 1, the base electrode 6, and the insulating member 2.

The basic operation of the present invention can be explained using Figure 2. [To explain, 6 in the figure is a back electrode, 5 is a recording member for paper screams which is a receptor body, and this member 5 is in close contact with the back electrode 6. . Reference numeral 7 denotes a toner conveying member made of a non-magnetic material, and 11 a one-component insulating magnetic toner, which is uniformly applied onto the toner conveying member 7. As shown in FIGS. 1A and 1B, the solid control members include the back electrode 6, the toner 1, and the transport member 7. and the back electrode 611
11 and signal 1 & c pole 1 are opposed to each other, and the toner conveying member 7 and the plate are connected to each other.
.

- The sumi poles are opposite to each other. 8 on this conveying member
is a negative (→) electrically charged insulating toner colored black;
On the other hand, numeral 9 is an insulating toner colored red and charged with extrusion, and both toners 8 and 9 are applied on the toner conveying member 7 in a uniform thickness. @1 The control member explained in FIG.
are opposite each other.

In the above configuration, the AC power source 10 is connected to the base electrode 3 and the toner conveying member 7. Further, the AC type #111 is connected to the base electrode 6 and the back electrode 6.

Here, when an AC voltage is applied between the base electrode 3 and the toner transport member 7 from the AC power supply 10, an alternating electric field is generated between the electrode 3 and the transport member 7, and the positive polarity toner 8 on the transport member 7 is generated.
The toner 9 is alternately reciprocated between the conveying member 7 and the base plate 6. The reciprocating motion caused by this alternating electric field also has the effect of allowing the black insulating toner 8 and the red insulating toner 9 to be mixed more uniformly on the toner conveying member 7. In addition, 12 in the figure is a signal power supply, and the signal voltage of positive (E) and negative (→ or 0■) required for l & line image formation is applied to the signal power 1kl.
to be applied.

With the above configuration, when a positive signal voltage is applied from the signal power source 12 to the signal voltage 1kl, the potential inside the aperture 4 becomes higher on the recording member side, so that the black negative toner 8 has an effect of passing through the aperture 4. The AC voltage from the AC power supply 11 is applied to the back electrode 6.
When the back electrode is on the normal output side, the black toner 8 reaches the recording member 5 and adheres thereto to form a black toner. On the other hand, when a negative signal voltage is applied to the signal electrode 1, the red positive toner 9 reaches and adheres to the recording member 5 when the back electrode becomes negative (→ side) due to the action of the electric field as described above. to form a red me.

As described above, a two-color image is formed on the recording member 5 simply by applying a positive (A) or negative (→) signal voltage from the signal power supply 12 to the signal electrode 1 in accordance with one image signal. Kome 1
The toner 8.9 on the recording member formed by me is fixed by means such as heating or pressure.

II from Figure 6 A and B and Figure 4 A and BK! The example of the toner movement and bias application shown in FIG. 2 will be explained in more detail. Note that the same numbers as in FIG. 2 represent members having the same functions.

@6 Figures A-B explain the state in which the red positive (-F) insulating toner 9 is attached to the distribution member 5, and in @3 Figure B showing the θ support diagram at that time, a is AC voltage waveform from AC power supply 11, b is AC voltage waveform from AC power supply 10,
C is a signal waveform from the signal power supply 12, and each waveform is exemplified when the pace electrode 3 is electrically neutral (grounded). When a component negative (→ polarity) voltage is applied, this conveying member 7
Red positive polarity toner 9 and black negative polarity toner 8 on top
The red positive polarity toner 9 is directed in the direction of the arrow of the pace electrode 6, while the black negative polarity toner 8 is stationary on the conveying member 7 or is attracted to the same member 7I. In this λ state, when a negative (@ polarity signal such as the waveform C in FIG. 3H is applied from the signal power supply 12 to the signal electrode 1), the red positive toner 9 opens. Further, the normal toner 9 is accelerated by the alternating current component as shown in the waveform a in FIG. 3B, and adheres to the surface of the recording member 5.

4A and 4B show the process of attaching black negative (→polar) insulating toner 8 to the recording member 5, and in FIG. 11, C is the AC waveform from the AC power supply 10, and f is the signal waveform from the signal set 12, which is the same as above for the base electrode 6.
An example is shown in which the voltage is set to ground potential.

Here, waveform C, which is a negative voltage shown in FIG. 4B, is applied to the toner conveying member 7, contrary to the red toner. The behavior of the toner 8.9 on the toner transport member 7 then acts in the opposite manner to that described above. In this state, signal power supply 1 to signal power supply 1
When a positive polarity signal such as 2 to f is applied, an electric field is generated in the aperture 4 in the direction of passing through the black negative (→ polarity toner 8), and a positive signal as shown in waveform d is generated within the aperture 4. (By applying an alternating current component of +1 to the back electrode 6, the toner 8 is accelerated. FIG. 5 of the recording member 5 is an example of a refreshing M1 using the apparatus of the present invention.

In addition, the parts in the drawings with the same numbers as in Fig. 2 have the same functions as the members explained in Fig. 2.

In the figure, reference numeral 15 denotes a cylindrical toner conveying member made of a non-magnetic material, the surface of which is covered with an insulating member 14 made of a resin film or paint, and a fixed magnet 15 is housed inside. Reference numeral 16 denotes a hopper for storing toner, and a toner conveying member 16. magnetic carrier 1
18. different polarity insulating toners of two different colors mixed with 7.
19 are accommodated. 20 is AC power supply and blade 21
is connected to the toner conveying member 16, and the two-color toner 18, 19 is spread onto the conveying member 16 in a uniform thickness VClm by this blade and voltage. Further, due to the action of the magnetic blade 21 and the fixed magnet 150, the magnetic carrier 17 only circulates within the hopper 16 even when the toner conveying member moves, and does not adhere to the toner conveying member.

On the other hand, the recording member 22 made of continuous paper has a drive roller 23
This allows stable transport in the direction of the arrow. Then, the recording member on which the two-color toner image has been formed is sent to a heating fixing roller 24, and the insulating toner is fixed on the recording member. The gap between the back electrode 25 and the signal electrode 1 of the control member is 100 microns to 1
In this embodiment, it is approximately 500 microns, and an AC voltage (Vp-p) of 2 kV is applied from an AC power source 26 to the back electrode 25 and the base electrode 6 of the control member. Ru. The electric field between the input back electrode 25 and the base electrode 6 is 1au.
500 to 2500 V per o is suitable. signal line 1k
1 and the pace electrode 6 are maintained at a distance 11e'j of 25 microns by the insulating material 2, and a signal voltage of +180V or -180V is applied from the signal power supply 27 only to the points necessary for generating characters in different colors. Note that this pace electrode 6° signal electrode 1. The insulating member 2 is provided with an opening having a diameter of 150 microns, which is sufficient for toner to pass through. This-
The opening 4 has a [column shape K 25
There are 76 of them, and the signal number 1 is independently connected to the signal power supply 27 as shown in FIG.

The gap between the toner conveying member 16 and the pace electrode 6 is 100 to 5
A suitable distance is 0.00 m, and in order to improve the recording speed, it is better to be as narrow as possible so that the toner is not pressed against the conveyance member.

In this embodiment, the gap is 500 cm, and the AC power supply is 28 cm.
Supply voltage from 4I:4 to Hz.

1. OkVK L.

Under the above conditions, the toner conveying member 16 is made of alumite treated aluminum with a diameter of 32 m, rotates at a rotation speed of 150 rpm in the direction of the arrow K, and is connected to the AC power source 2.
When an AC IE voltage (Vp I) of 400 V, 4 KHz is applied between the blade 21 and the toner conveying member 15 from zero, black negative (→ toner 18 and red positive (A) toner 19 are alternately deposited on the conveying member 16. In this state, while moving the recording member 5 in the direction of the arrow K at 250+as/sec, a Shinzuki pulse necessary for recording image information is applied to the signal electrode 1 from the signal power supply 27, and as shown in FIG. 6 and sg4. The insulating toner 18, 19 is selectively applied to the recording member 22 according to the described principle.
as a result of which multicolored letters or figures are recorded. The toners 18 and 19 deposited on the recording member 22 are fixed by the heating roller 24.

In the above embodiment, a method of charging the toner with a carrier using magnetic toner particles was used as a method for attaching toner to the toner transport member 16, but there are various other methods for attaching toner to the transport member. For example, it is possible to use a fur brush, use the mirror image force due to the charge of the toner itself, or use the so-called micro field method in which a fine charge pattern is provided on the toner transporting member and adhered thereto. Note that in this case, the toner does not need to have magnetism.

As explained above, according to the present invention, it is possible to perform two-color one-frame recording by controlling the electric field twice without going through the steps of forming and developing latent scratches. Furthermore, the toner image formed on the receiving body may be transferred to another member for use.

[Brief explanation of drawings]

Figure 1 is a plan view of a control member applicable to the present invention, @1
Figure B is Figure 1 Person 1-1. 2 is a sectional view of the toner control section showing one principle of the present invention, FIG. 6 is a sectional view of the toner control section, and FIG.
Figure person shows toner change 14111 thi cough wc6 Figure B
and Figure 4B are waveform diagrams corresponding to Figure 6 and 111f corresponding to Figure 4. Signal electrode, 6 is a pace electrode, 4 is an aperture, 5 is a recording member, 6 is a back electrode, 7 is a conveyance member, 8 is a black negative (→ toner), 9 is a red positive (a) toner, 10 is a pace Electrode 3
and an AC power source applied to the toner conveying member, 11 an AC power source applied to the pace electrode 3 and the back electrode 6, and 12 a signal power source. Applicant Canon Co., Ltd. Agent Gi Marushima -1r”7)

Claims (1)

[Claims] (1) A charged powder developer having two different colors and potentials of opposite polarity, a developer transporting member that holds and transports this developer, and an opening that allows the developer to pass through. It has a control section for controlling the flow rate, and an image receptor that receives developer from the control member, and forms an alternating electric field between the developer transporting member and the image receptor, and causes the control member to open under this electric field. An image recording apparatus that forms an electric field that accelerates toner that is desired to pass through the holes, and forms two-color sii* on the image receptor.