JPH0659537A - Electrostatic recorder - Google Patents

Abstract

PURPOSE:To prevent the degradation in the quality of a recorded image arising from the deformation of an electrostatic latent image carrying member without increasing the size and weight of the device by disposing an ion current control type recording head in a prescribed position. CONSTITUTION:The ion current control type recording head 1 is so constituted as to be disposed in the position where the line L1 connecting the ion current discharge part of this ion current control type recording head 1 and the central part of the electrostatic latent image carrying member 2 intersects nearly orthogonally with a line L2 connecting the central part of the electrostatic latent image carrying member and the central part of a pressing means 3. Even if, therefore, a deflective deformation to project a dielectric substance drum 2 upward arises in this drum, this deflective deformation appears along the line connecting the central part of the dielectric substance drum 21 and the central part of a transfer roll 3 and hardly appears in the direction orthogonal with the line connecting the central part of the dielectric substance drum 2 and the central part of the transfer roll 3. Then, the fluctuation in the spacing distance between the ion current control type recording head 1 and the dielectric substance drum 2 decreases in the axial direction of the dielectric substance drum 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic recording device used in a copying machine, a printer or the like, and more particularly, it is transferred by pressure by pressing a pressing means against an electrostatic latent image carrier.
Alternatively, the present invention relates to an electrostatic recording device that simultaneously performs transfer and fixing.

[0002]

2. Description of the Related Art Conventionally, as this type of electrostatic recording device,
For example, there is one shown in Japanese Patent Publication No. 57-501348. As shown in FIG. 14, the electrostatic recording apparatus according to this proposal has an ion flow control type recording head 101 for writing an electrostatic latent image around a dielectric drum 100 and a surface of the dielectric drum 100. The developing device 103 that develops the formed electrostatic latent image, the transfer roll 105 that presses the developed image on the surface of the dielectric drum 100 with high pressure to transfer and fix the developed image onto the recording sheet 104, and the developed image. A static eliminator 10 for neutralizing the surface of the dielectric drum 100 after the transfer.
6 and 6 are arranged.

As the above-mentioned ion flow control type recording head 101, in addition to the one disclosed in JP-A-57-501348, JP-A-2-279354 and JP-A-59-1.
What is proposed by the 90854 publication etc. can be used. These ion flow control type recording heads 101
In either case, the ion flow generated from the ion generator is controlled according to the image information, and this ion flow is formed in the gap between the ion flow control type recording head 101 and the dielectric drum 100. The electric field is taken out of the ion flow control type recording head 101 to form an electrostatic latent image on the dielectric drum 100.

Then, in the electrostatic recording apparatus, after the development image is formed on the surface of the dielectric drum 100, the dielectric drum 1 is formed.
00 and the transfer roll 105 that presses the surface with high pressure
By sandwiching and transporting the recording sheet 104 between
The developed image formed on the surface of the dielectric drum 100 is transferred and fixed simultaneously on the recording paper 104 by pressure to record the image.

[0005]

However, the above-mentioned prior art has the following problems. That is, in the case of the conventional electrostatic recording apparatus, the transfer roll 105 is pressed against the surface of the dielectric drum 100 with a high pressure to perform simultaneous transfer fixing or transfer by the pressure. Therefore, the dielectric drum 100 is
As shown in FIG. 2, due to the high pressure received from the transfer roll 105, the dielectric drum 100 bends upward in a convex shape, and the bending of the dielectric drum 100 cannot be avoided due to its mechanical structure. When the dielectric drum 100 is thus deformed, it becomes difficult to maintain a constant gap distance between the ion flow control type recording head 101 and the dielectric drum 100.

By the way, as described above, the ion flow control type recording head 101 allows the ion flow to reach the surface of the dielectric drum 100 by an electrostatic field formed between the ion flow control type recording head 101 and the dielectric drum 100. Since an image is formed, the nonuniformity of the gap distance between the dielectric drum 100 and the ion flow control type recording head 101 causes unevenness of the electric field strength that causes the ion flow to reach the surface of the dielectric drum 100, which causes static electricity. This causes unevenness in the amount of ions forming the latent image, which causes unevenness in the image. As a result, in the image recorded on the recording paper 105, a difference in density and a difference in line width appear along the axial direction of the dielectric drum 100, and there is a problem that the image quality of the recorded image deteriorates.

Therefore, in order to solve this problem,
Increasing the diameter of the dielectric drum 100 to increase the dielectric drum 1
It is conceivable to increase the rigidity of No. 00 to make the dielectric drum 100 hard to bend, and it is actually used.

However, in this case, the dielectric drum 10
Since the diameter of 0 becomes large, there is a new problem that the device becomes larger and heavier.

There is an ion printer developed by Olympus Optical Co., Ltd. as a device commercialized with the structure shown in FIG. 14 (reference document, 3rd Non-Impact Printing Technology Symposium Proceedings 5-3). There, an alumite drum having an aluminum pipe as a base material is used as an electrostatic latent image carrier, and the deflection caused by a pressing force of about 700 kgf is several μm, but the diameter of the alumite drum is as large as 100 mm.

Therefore, the present invention has been made in order to solve the above-mentioned problems of the prior art, and its purpose is to prevent the electrostatic latent image carrier from increasing in size and weight of the apparatus. An object of the present invention is to provide an electrostatic recording device capable of preventing deterioration in image quality of a recorded image due to deformation of the above.

[0011]

That is, the present invention is
As shown in FIG. 1, an electrostatic latent image carrier 2 and an ion flow control type recording head for forming an electrostatic latent image on the electrostatic latent image carrier 2 by controlling an ion flow according to image information. 1, a developing means 4 for developing the electrostatic latent image formed on the electrostatic latent image carrier 2, and the electrostatic latent image carrier 2 under pressure contact with the electrostatic latent image carrier 2. In the electrostatic recording apparatus having the pressing means 3 for transferring or transferring and fixing the formed developed image on the recording medium 6 by pressure, the ion flow control type recording head 1 is replaced with the ion flow control type recording head 1. A line L1 connecting the ion stream discharge part and the central part of the electrostatic latent image carrier 2
Is arranged at a position substantially orthogonal to a line L2 connecting the central portion of the electrostatic latent image carrier 2 and the central portion of the pressing means 3.

Further, in the present invention, the electrostatic latent image carrier has a control means for controlling the writing sequence and the writing timing of the ion flow in the main scanning direction of the ion flow control type recording head 1 as required. The ion flow control type recording head 1 is configured to be driven according to the deflection of the recording medium 2.

In the figure, 5 is an electrostatic latent image carrier 2.
It shows a static eliminator for eliminating static electricity on the surface.

[0014]

2 shows the ion flow control type recording head 1 when the ion flow control type recording head 1 is arranged on a straight line connecting the central portion of the electrostatic latent image carrier 2 and the central portion of the pressing means 3. 2 schematically shows a state of a gap between the electrostatic latent image carrier 2 and the electrostatic latent image carrier 2. The electrostatic latent image carrier 2 receives a pressing force F from below by the pressing means 3 and bends in an upward convex shape as shown in the figure. Therefore, when the gap length between the ion flow control type recording head 1 and the electrostatic latent image carrier 2 is set to be the appropriate value gap1 at the end of the print width, the gap is narrower than the gap1 at the center by gap. turn into. The gap distance between the ion flow control type recording head 1 and the electrostatic latent image carrier 2 and the amount of ions extracted from the ion flow control type recording head 1 have a correlation as shown in FIG. The amount of ions with which the central portion of the image carrier 2 is irradiated is increased by Δj from the end portion. As a result, the electrostatic latent image formed on the electrostatic latent image carrier 2 becomes non-uniform because the central portion has a higher potential than the end portions, and the image density is non-uniform on the developed toner image. Image unevenness, such as unevenness in line width or line width, will occur.

Therefore, according to the present invention, in the ion flow control type recording head 1, a line L1 connecting the ion flow discharge part of the ion flow control type recording head 1 and the central part of the electrostatic latent image carrier 2 is The electrostatic latent image carrier 2 is arranged at a position substantially orthogonal to a line L2 connecting the central portion of the electrostatic latent image carrier 2 and the central portion of the pressing means 3.

This operation will be described with reference to FIG.

FIG. 4 is a schematic view of the positional relationship between the ion flow control type recording head 1 and the electrostatic latent image carrier 2 having a radius r as seen from the direction of the rotation axis of the electrostatic latent image carrier 2. This shows a case where the ion flow control type recording head 1 is arranged at an angle θ with reference to the cross section 2-1 of the electrostatic latent image carrier 2 corresponding to the end of the print width. A point O is the center of the cross section 2-1 of the electrostatic latent image carrier 2 corresponding to the end of the print width, and a point O ′ is the center of the cross section 2-2 corresponding to the center of the electrostatic latent image carrier 2. P indicates the ion ejecting portion of the ion flow control type recording head 1, respectively. Here, when the ion flow control type recording head 1 has a two-dimensional matrix structure as shown in Japanese Patent Publication No. 57-501348, the point P is located because the ion outlets are two-dimensionally arranged. Although it is not limited to one place, in the gist of the present invention, the central portion of the electrode group arranged two-dimensionally may be regarded as the point P.

By the way, the electrostatic latent image carrier 2 receives a pressing force F from below by a pressing means (not shown) and bends upward in a convex shape. As a result, the cross section 2-2 at the central portion of the electrostatic latent image carrier 2 is displaced upward by Δy with respect to the cross section 2-1 at the end portion (hereinafter, Δy is referred to as a deflection amount). When the ion flow control type recording head 1 is arranged so as to have an appropriate gap length gap1 with reference to the end of the electrostatic latent image carrier 2, the gap length gap2 at the center of the electrostatic latent image carrier 2 is as follows. Can be expressed as

Gap2 = {(r + gap1) ² −2 · Δy · (r + gap1) · sin θ + (Δy) ² } ^1/2 −r (1)

In this equation, as shown in FIG. 5, the center point O of the cross section 2-1 at the end of the electrostatic latent image carrier 2 is used as the origin, and this cross section 2-1 is x ² + y ² = r ² , The cross section 2-2 of the central portion is x ² + (y−Δy) ² = r ² , and the coordinates (x, y) of the point P are ((r + gap1) cos θ, (r + ga)
p1) sin θ), geometrically gap1 and gap1
The relationship of 2 is expressed by using the deflection amount Δy and the arrangement angle θ of the ion blowing point P as parameters.

In this equation (1), gap1 is 300
gap2 and deflection amount Δy when μm and r are 15 mm
The relationship is calculated as shown in FIG. For example,
Assuming that the permissible variation range of the gap length between the ion flow control type recording head 1 and the electrostatic latent image carrier 2 is 300 ± 60 μm, FIG.
The combination of the angle θ and the bending amount Δy in the area sandwiched by the two broken lines M and N in the middle satisfies the requirement. This Figure 6
As is clear from the above, the smaller the angle θ is, the wider the allowable range of the bending amount Δy that satisfies the allowable variation range of the air gap length is 300 ± 60 μm.

The relationship between the allowable limit value of the bending amount Δy and the angle θ is shown in FIG. As is clear from FIG. 7, it is found that the margin for the deflection amount Δy of the electrostatic latent image carrier 2 is wide in the vicinity of θ = 0 °, and is particularly remarkable in the range of −10 ° <θ <10 °. .

As described above, the ion flow control type recording head 1
Is a line connecting the ion flow discharge part P of the ion flow control type recording head 1 and the central part of the electrostatic latent image carrier 2 between the central part of the electrostatic latent image carrier 2 and the pressing means 3. By arranging at a position substantially orthogonal to the line connecting the central portions, that is, in the vicinity of θ = 0 °, even if the electrostatic latent image carrier 2 is largely bent, the variation in the air gap length is small, and the ion flow control type recording is possible. The fluctuation of the amount of ions supplied from the head 1 can be suppressed within an allowable range, the fluctuation of the line width and the density difference can be prevented from appearing in the recorded image, and high-quality image recording can be performed. Therefore, the electrostatic latent image carrier 2 has a small diameter,
Even a roll material having a not so high rigidity can be used as a base material of the electrostatic latent image carrier 2 and the size and weight of the apparatus can be reduced.

On the other hand, as described above, the ion flow control type recording head 1 is provided with a line L1 connecting the ion flow discharge part P of the ion flow control type recording head 1 and the central part of the electrostatic latent image carrier 2.
Is disposed at a position substantially orthogonal to a line L2 connecting the central portion of the electrostatic latent image carrier 2 and the central portion of the pressing means 3, whereby the amount of ions supplied from the ion flow control type recording head 1 is increased. However, in this case, the ion flow control type recording head 1 electrostatically charges the surface of the electrostatic latent image carrier 2 that is bent upward in a convex shape. It forms a latent image. Therefore, the electrostatic latent image formed on the surface of the electrostatic latent image carrier 2 may be affected by the bending of the electrostatic latent image carrier 2.

That is, FIG. 8A schematically shows a problem when printing is performed on the bent electrostatic latent image carrier 2. A horizontal line image L formed linearly on the electrostatic latent image carrier 2
Since the electrostatic latent image carrier 2 is bent, the electrostatic latent image carrier 2 is curved as shown in FIG. 8A when it is transferred onto the recording medium 6. Therefore, in order to obtain a linear image without curvature on the recording medium 6, the ion flow control type recording head 1 is used according to the amount of deflection of the electrostatic latent image carrier 2 as shown in FIG. 8B. It is necessary to deform the formed electrostatic latent image.

Therefore, in the present invention, if the deflection of the electrostatic latent image carrier 2 has a large effect on the linearity of the recorded image, the ion flow control type recording head 1 in the main scanning direction can be moved as needed. In each bit, a control means for driving the ion flow control type recording head 1 is provided so that the bit corresponding to the position where the amount of deflection of the electrostatic latent image carrier 2 is smaller prints in an earlier order. Has been done.

FIG. 9 is a block diagram showing a control means showing a structure therefor.

In the figure, 8 is a CPU, RAM and RO
M is a control circuit including a driver for driving the ion flow control type recording head 1 based on a signal from the CPU. The control circuit 8 outputs the image data to be printed, which is output from a communication line (not shown), an image memory, etc., and the amount of flexure of the electrostatic latent image carrier 2 output from setting means (not shown) and detection means, in each bit. The deflection data obtained for each position is input. The flexure data of the electrostatic latent image carrier 2 is obtained by measuring or estimating the flexure amount in advance, and the data is preliminarily stored in the R table as a reference table.
It may be stored in the OM or the like, or in order to accommodate various widths and thicknesses of the recording medium 6, a means for detecting the width and thickness of the recording medium 6 is provided, and the detection result is determined according to the detection result. The amount of bending may be estimated for each print, the bending data may be rewritten, and the data may be input to the control circuit 8.

The control circuit 8 determines the proper writing order and the proper writing timing for each bit from the deflection data, and drives the ion flow control type recording head 1 so that the image transferred onto the recording medium 6 is not curved. To do.

FIG. 10 is a schematic diagram for explaining flexure data. This figure shows a case where there are a total of n printing bits of the ion flow control type recording head 1, and the deflection data stores the deflection amount δj of the electrostatic latent image carrier 2 corresponding to each bit. ing. In the figure, the electrostatic latent image carrier 2 is set for each bit with reference to the position corresponding to bit No1.
The case where the amount of deflection δj at the position to be recorded is obtained is shown above. The control circuit 8 compares the deflection amounts δj and rearranges them in ascending order, and controls the recording head 1 with the order as the writing order. For example, assuming that the amount of flexure at both ends of the electrostatic latent image carrier 2 is the smallest and the amount of flexure gradually increases toward the central part, the control circuit 8 causes the amount of flexure δj to increase in the order of 1, n, and 2. , N-1, 3, n-2 ...
In this way, they are arranged in order from both ends toward the center.
Then, the bit No. The timing for writing j will be set tj = δj ÷ (process speed) after writing bit 1.

It is preferable to control the writing order and the writing timing bit by bit for obtaining a good image.
Even if the block is used and the control is performed in block units, a sufficient effect can be obtained for preventing the curving of the image.

As described above, by controlling the writing order and the writing timing by the control circuit 8, it becomes possible to accurately record a straight line on the recording medium 6.

[0033]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments.

FIG. 11 shows an embodiment of the electrostatic recording apparatus according to the present invention.

In FIG. 11, reference numeral 2 is a dielectric drum as an electrostatic latent image bearing member. As the dielectric drum 2, for example, an aluminum roll having a diameter of 30 mm and a length of 250 mm is used as a base material, and an anode is provided on the surface. The thing which formed the dielectric layer by performing an oxidation process, a sealing, and a polishing process is used.

Around the dielectric drum 2, an ion current control type recording head 1 for writing an electrostatic latent image, and a developing device for developing the electrostatic latent image formed on the surface of the dielectric drum 2. 4 and the transfer roll 3 that presses the developed image onto the recording paper 6 at the same time so as to transfer and fix it, and remains on the surface of the dielectric drum 2 after the developed image is transferred. A cleaner 7 for removing the developed developer,
A static eliminator 5 that neutralizes the surface of the dielectric drum 2 is arranged.

By the way, in this embodiment, in the ion flow control type recording head 1, the line connecting the ion flow discharge part of the ion flow control type recording head 1 and the central part of the dielectric drum 2 is the dielectric drum. It is arranged so as to be arranged at a position orthogonal to a line connecting the central portion of 2 and the central portion of the transfer roll 3.

As the ion flow control type recording head 1, for example, the same one as disclosed in JP-A-59-190854 can be used. This ion flow control type recording head 1 has a control circuit 8 as shown in FIG.
And is designed to form a predetermined electrostatic latent image in accordance with the control operation of the control circuit 8. Further, as shown in FIG. 12, the control electrodes 10, 10 ... Which control the ion flow of the ion flow control type recording head 1 are 6
Four blocks make up one block, and 40 blocks are provided, and 2560 electrodes 10, 10 ... Are arranged in a straight line in a total of 64 bits × 40 blocks. Then, the control electrodes 10 and 1
0 ... Is connected to the thin film transistor TFT for each bit, and the thin film transistors TFT of one block are simultaneously turned on, so that the control electrodes 10,
A voltage corresponding to the image data of each bit is applied to each of 10 ... via the data lines, and each block is individually driven according to the control operation of the control circuit 8. Further, these control electrodes 10, 10, ... Are arranged so that the A4 short width can be printed at a density of 300 per inch.

When writing one line in the main scanning direction (the axial direction of the dielectric drum) in the ion flow control type recording head 1, the flexure caused in the dielectric drum 2 is smallest at both ends and becomes larger toward the center. Therefore, as shown in FIG. 13, block 1, block 40, block 2,
Block 39, ..., Block 20, and block 21 are sequentially scanned from the blocks at both ends to the central block. The timing at which each block is sequentially turned on is controlled by controlling the control circuit 8 by calculating the time from the amount of bending of the dielectric drum 2.

As the transfer roll 3, for example, a steel roll whose surface is coated with a polyacetal resin is used.

On the other hand, as the developing device 4, for example, a device equipped with a magnet roll and using a one-component magnetic toner having a pressure fixing property is used.

With the above structure, the electrostatic recording apparatus according to this embodiment records an image as follows. That is, the surface of the dielectric drum 2 is neutralized by the static eliminator 5 to remove the electric charges and the surface potential is set to 0 V. Then, the surface of the dielectric drum 2 is separated from the ion flow control type recording head 1. An electrostatic latent image is formed by the emitted ion stream. The electrostatic latent image formed on the surface of the dielectric drum 2 is developed by the developing device 4 into a toner image, and the toner image is formed on the dielectric drum 2 and the transfer roll 3.
The recording paper 6 which is introduced at a predetermined timing into the pressure contact portion with
At the same time, the transfer and fixing are carried out by pressure.

By the way, the dielectric drum 2 has a structure shown in FIG.
As shown in FIG. 2, since the transfer roll 3 is pressed against it from below with a high pressure, the dielectric drum 2 is flexibly deformed so as to be convex upward as shown in FIG.

However, the ion flow control type recording head 1 for forming an electrostatic latent image on the surface of the dielectric drum 2 has the center of the ion flow discharge part of the ion flow control type recording head 1 and the dielectric drum 2. The line connecting the portions is arranged at a position orthogonal to the line connecting the central portion of the dielectric drum 2 and the central portion of the transfer roll 3. Therefore, the dielectric drum 2
Even when a bending deformation that causes an upward convex shape occurs on the dielectric drum 2, the bending deformation of the dielectric drum 2 is
Appearing along a line connecting the center of the transfer roll 3 and the center of the transfer roll 3, and the center of the dielectric drum 2 and the transfer roll 3
It hardly appears in the direction orthogonal to the line connecting the central parts of. Therefore, the variation of the air gap distance between the ion flow control type recording head 1 and the dielectric drum 2 is small over the entire axial direction of the dielectric drum 2 as shown in FIG. Therefore, a good electrostatic latent image can be formed on the dielectric drum 2, and high-quality image recording can be performed without causing a difference in density or a difference in line width.

Further, in this embodiment, in each bit in the main scanning direction of the ion flow control type recording head 1, the bit corresponding to the position where the deflection amount of the dielectric drum 2 is small prints in an earlier order. A control circuit 8 for driving the ion flow control type recording head 1 is provided. Therefore, even when the electrostatic latent image is formed by the ion flow control type recording head 1 on the surface of the flexurally deformed dielectric drum 2 which is convex upward, the control circuit 8 controls the ion flow control type recording head 1. Control electrodes 10, 10 for each bit of
By controlling the timing of writing in ..., An electrostatic latent image can be formed on the surface of the dielectric drum 2 according to the amount of bending. Therefore, even when an electrostatic latent image is formed on the surface of the dielectric drum 2 that is flexibly deformed so as to be convex upward, from the direction orthogonal to the deformation direction, the dielectric drum 2 that is flexibly deformed The deflection of the dielectric drum 2 projected in the direction of the line connecting the central portion of the dielectric drum 2 and the central portion of the transfer roll 3 when rotated and moved to the transfer position is apparently corrected, and the recording paper 6 It does not appear in the image transferred above. for that reason,
As shown in FIG. 8B, it is possible to record a linear image with high accuracy.

The present inventors prototyped the above electrostatic recording apparatus and actually printed an image under the above conditions. As a result, a good image free from uneven density, uneven line width, and curved line was obtained. .

[0047]

According to the present invention, which has the above-described structure and operation, a good image can be obtained even when an electrostatic latent image carrier having a relatively low rigidity is used, and the apparatus can be made compact and lightweight. Can be realized.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an electrostatic recording apparatus according to the present invention.

FIG. 2 is a schematic view showing a deformed state of the electrostatic latent image carrier drum.

FIG. 3 is a graph showing the relationship between the ion length and the gap length between the ion flow control type recording head and the electrostatic latent image carrier.

FIG. 4 is a line connecting the ion flow discharge part of the ion flow control type recording head and the central part of the electrostatic latent image carrier, the central part of the electrostatic latent image carrier and the center of the pressing means. FIG. 4 is a schematic diagram showing a relationship between an angle formed by a line connecting the portions and a gap length between the ion flow control type recording head and the electrostatic latent image carrier.

FIG. 5 is a view showing a line connecting the ion flow discharge part of the ion flow control type recording head and the central part of the electrostatic latent image carrier, the central part of the electrostatic latent image carrier and the pressing means. FIG. 6 is a schematic diagram showing a relationship between an angle formed by a line connecting the central portions and a gap length between the ion flow control type recording head and the electrostatic latent image carrier.

FIG. 6 is a graph showing the relationship between the bending amount and the void length.

FIG. 7 is a view showing a line connecting an ion flow discharge part of an ion flow control type recording head and a central part of the electrostatic latent image carrier, a central part of the electrostatic latent image carrier and a center of the pressing means. It is a graph which shows the relationship between the angle which the line which connects a part makes, and the permissible limit value of the amount of bending.

FIGS. 8A and 8B are schematic diagrams showing the relationship between the deflection of the electrostatic latent image carrier and the linearity of the recorded image.

FIG. 9 is a block diagram showing a control circuit.

FIG. 10 is an explanatory diagram showing a relationship between a bit of a recording head and a bending amount.

FIG. 11 is a block diagram showing an embodiment of the electrostatic recording apparatus according to the present invention.

FIG. 12 is a circuit diagram showing a drive circuit of a recording head.

FIG. 13 is a schematic diagram showing an image recording sequence of a recording head.

FIG. 14 is a configuration diagram showing a conventional electrostatic recording device.

[Explanation of symbols]

1 ion flow control type recording head, 2 electrostatic latent image carrier,
3 pressing means, 4 original imager, 8 control circuit, L1 line connecting the ion flow discharge part of the ion flow control type recording head and the central part of the electrostatic latent image carrier, L2 central part of the electrostatic latent image carrier And a line connecting the center of the pressing means.

Front page continued (72) Inventor Daisuke Tsuda 2274 Hongo, Ebina City, Kanagawa Prefecture Fuji Xerox Co., Ltd.Ebina Business Office (72) Inventor Shigeo Ohno 2274 Hongo, Ebina City, Kanagawa Prefecture Ebina Business Office Fuji Xerox Co., Ltd. (72 ) Inventor Tetsuro Kodera 2274 Hongo, Ebina City, Kanagawa Prefecture Ebina Fuji Xerox Co., Ltd. (72) Masanori Kobayashi 2274 Hongo, Ebina City, Kanagawa Fuji Xerox Co., Ltd.

Claims (2)

[Claims] 1. An electrostatic latent image carrier, an ion flow control type recording head for forming an electrostatic latent image on the electrostatic latent image carrier by controlling an ion flow in accordance with image information, and the electrostatic latent image carrier. A developing means for developing the electrostatic latent image formed on the electrostatic latent image carrier, and a developed image formed on the electrostatic latent image carrier, which is brought into pressure contact with the electrostatic latent image carrier, on a recording medium. In an electrostatic recording apparatus having a pressing means for transferring or transferring and fixing by pressure to the ion flow control type recording head, the ion flow control type recording head is provided with an ion flow discharge part of the ion flow control type recording head and the electrostatic latent image carrier. An electrostatic recording apparatus, wherein a line connecting the central portions is arranged at a position substantially orthogonal to a line connecting the central portion of the electrostatic latent image carrier and the central portion of the pressing means. 2. The electrostatic recording apparatus according to claim 1, further comprising control means for controlling a writing sequence and a writing timing of the ion flow in the main scanning direction of the ion flow control type recording head.