JPS63112165A - Ion flow generating type electrostatic recorder - Google Patents

Abstract

PURPOSE:To prevent image density from being varied due to the variations in characteristics of an ion flow generating means or the variations in temperature, humidity or the like, by detecting the surface potential of an electrostatic latent image forming material, and controlling a driving voltage for the ion flow generating means according to the result of the detection. CONSTITUTION:Under the condition where a photosensitive belt 2 is made conductive by turning ON a light-emitting diode array 180, a voltage VD=3KV is applied to a driving electrode 31 while a voltage VS=-1,000V is applied to a screen electrode 32, and a negative DC voltage is applied sequentially to each divisional unit of controlling electrodes 32 from a power source 38 for the controlling electrodes through a divisional driving circuit 186. In each divisional unit, the voltage at the controlling electrode is controlled based on an output from a voltage-detecting circuit 181 so that the current flowing through a resistor R becomes 10muA, and the voltage is stored into a nonvolatile RAM as a set voltage. In a copying operation, a writing head 5 is controlled based on the set voltage stored in the nonvolatile RAM. Since driving voltages are divisionally controlled so that ion flows become uniform throughout the writing head, the uniformity of developed density is ensured.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is an ion flow generation type electrostatic recording head that prevents changes in image density due to changes in conditions such as humidity and temperature, and deterioration of characteristics of the ion flow generation type electrostatic recording head. This invention relates to an electrostatic recording device.

[Conventional technology]

As an electrophotographic copying machine equipped with a conventional ion flow ordering type electrostatic recording head, for example, US Pat. No. 4,155,093
There is something shown in the specification of the No. This electrophotographic copying machine includes an exposing means for exposing a photoreceptor to light reflected from an original, a charging means for charging the photoreceptor before exposure, a developing means for developing an electrostatic latent image formed by exposure with toner, and a toner image. It has a transfer means etc. around the photoreceptor drum for transferring the image to the recording medium, and in addition to these means, it generates an ion flow according to the image signal read from the image memory etc. to transfer the image to the photoreceptor drum. an ion flow generating means for forming an electrostatic latent image (hereinafter referred to as an electrostatic charge image to distinguish it from an electrostatic latent image) based on exposure to light; It has a charge eliminating means for erasing the latent charge image.

In the above configuration, a document is placed on the document table, and
For example, company name, date, etc. to be added to copies of this manuscript content.
When the image information II (hereinafter referred to as additional information) of the department, etc. is instructed from the console panel and the start button is turned on, an electrostatic latent image based on the exposure means and an electrostatic charge image based on the ion flow generation means are created on the photoreceptor drum. is formed, which is developed by a developing means and then transferred to a recording medium by a transfer means, and when the transferred image is fixed on the recording medium, a record containing a copy of the original content and an additional information image is created on the recording medium. can get.

Here, the ion flow generating means having the structure shown in FIG. 2 (bl) is equipped with a drive electrode, a control electrode, and a screen electrode. Peak-to-peak voltage is 3 KV
), a DC current of -1200 V (ON) or -800 V (OFF) is applied to the control electrode in accordance with the image signal with respect to the ground potential, and a DC voltage of -1000 V is applied to the screen electrode. In this way, a high frequency voltage is applied to the drive electrode, so for example, when 100,000 prints are made in F4 size, the ion flow generating means (recording head) must be replaced and the image density will be reduced due to characteristic deterioration. is kept from changing.

[Problem that the invention seeks to solve]

However, according to the conventional ion flow generation type electrostatic recording device,
The durability of the ion flow generating means varies depending on the recording image density and usage conditions (temperature, humidity, etc.), so it may not be possible to standardize the ion flow generation means according to the above-mentioned standards (A4 size, 100,000 prints). Even if the service life has not been reached, there is a disadvantage that the image density fluctuates depending on temperature, humidity, etc.

[Means to solve problems]

The present invention has been made in view of the above, and in order to accurately know when to replace the ion flow generating means and to prevent image density from changing due to fluctuations in its characteristics, temperature, humidity, etc. The present invention provides an ion current generation type electrostatic recording device in which the surface potential of an electrostatic latent image forming body is detected at a stage subsequent to the generation means, and the driving voltage of the ion flow generation means is controlled based on the detection result. be.

In the following embodiments, the static N latent image is formed by the ion flow generating means on the photoreceptor of the flexible endless belt, but it may also be formed on the dielectric belt.

Further, the control means for controlling the ion flow generation means has a storage means having a table for calibrating the detected value of the latent image potential based on the temperature, humidity, etc. at the time of detection, and the control means is configured to perform control using this table. , Furthermore, appropriate control can be performed. An example of the table is as follows.

(a) Detection voltage when humidity is H Drive voltage V 3181 V Dll+V !
281 V Dtl (+V 3nH1
νDnH1 Mountain) Detection voltage when humidity is H, , Drive voltage V 31HIIV DIHn V S2M++ V D2
HnV 9nlln V D
nH+s Below, the ion flow generation type electrostatic recording device according to the present invention will be explained in detail.

〔Example〕

(1) Structure of this system Figure 1 shows an electronic copying machine equipped with an ion flow ordering type electrostatic recording head (hereinafter simply referred to as a writing head).
A photoreceptor belt 2 in which an electrostatic latent image and an electrostatic charge image are formed.
A charging corotron 3 charges the photoreceptor belt 2 before forming an electrostatic latent image, and a partial static elimination lamp 4 partially erases the electrostatic latent image on the photoreceptor belt 2. , a writing head 5 that applies an ion flow to the photoreceptor belt 2 to form an electrostatic charge image, a developing device 6 that develops the electrostatic latent image and the electrostatic charge image on the photoreceptor belt 2, and the photoreceptor belt 2.
a transfer corotron 7 that transfers the upper toner image to recording paper;
A cleaning corotron 8 that facilitates the separation of the recording paper from the photoreceptor heald 2, a pre-clean corotron 9 that neutralizes the electric charge on the photoreceptor belt 2, and a cleaner 10 that cleans the photoreceptor belt 2 are provided. It is being A platen glass 11 on which a document is placed is provided above the exposure area of the photoreceptor belt 2, and a lens 13 is provided below the platen glass 11 to expose the photoreceptor belt 2 with light reflected from the document irradiated by a lamp 12. It is provided.

Inside one side of the main body 1 is a paper feed tray 1 that supplies recording paper.
4, above which is provided a duplex tray 15 for double-sided copying, further above which:
A discharge tray 16 is provided to receive recording paper.

A conveyance path 17 is provided between the paper feed tray 14 and the transfer area, and a conveyance path 18 is provided downstream of the transfer area, and the conveyance path 18 communicates with a fixing device 19 . Fuser 1
A conveyance path 20 is provided downstream of 9, which includes a path leading to an inverter 21 for inverting the recording paper and ejecting it to the duplex tray 15, and a path leading to an ejection tray 16 or ejecting the recording paper as it is to the duplex tray 15 without inverting it. The passage is branched into two passages.

A sorter 23 that receives recording sheets from a conveyance path 22 located above the duplex tray 15 is provided outside the main body 1 .

FIGS. 2(al) and ('b) show the write head 5 described above, which basically consists of a drive electrode 31 driven by a high frequency voltage of, for example, IMHz, 3 KV (peak to peak), and a write signal. (e.g. -1200
a control electrode 32 that is turned off (for example, a DC voltage of -aoov); and a screen electrode 33 that is applied with a DC voltage of, for example, -1000V to reduce the influence of the charge on the photoreceptor belt 2. has. Each electrode 31.
Insulator 34.35 on the surface or gap of 32.33
．． 36, the control electrode 32 has an ion guide hole 32a, and the screen electrode 33 has an ion emitting hole 3.
It has 3a. In addition, in FIG.
2, 39 is a high voltage power source that drives the screen electrode 33, 40 is a control section that controls the high voltage power source 38 according to a write signal, and 41 is a control section that detects the surface potential of photoreceptor belt 2. This is a potential sensor that inputs to 40. Here, the ion guide hole 32a of the control electrode 32 and the ion discharge hole 33a of the screen electrode 33 are arranged in the main scanning direction.
For example, it is formed at a density of 240 dots/inch.

FIG. 3 shows the above-mentioned partial static elimination lamp 4, which includes a signal electrode 51 whose at least tip portions (arranged in an array) 50 are transparent electrodes, and a tip portion 50 of the signal electrode 51.
and a common electrode (not shown) having light emitting diodes (arranged in an array) between them, and selectively applying a voltage to the signal electrode 51 causes the light emitting diode array to partially emit light. Can be done.

FIG. 4 shows a control section 40 that controls the control electrodes 32 of the write head 5 described above according to a write signal, and a control section 40 that controls the write head 5 under control of the system control section of the electronic copying machine.
It has PU61. This CPU 61 is connected to its input side with the aforementioned potential sensor 41 and a selection key circuit 62 that outputs a key signal (described later), and on its output side is a character generator (which stores a predetermined character pattern). ROM) 63 and a character generator (RO?'1) 63 as specified by CPIJ61.
a memory (RAM) 64 that temporarily stores an image signal based on a pattern generated from the memory (RAM) 6;
4 or a pattern generator 65 that generates a predetermined pattern signal based on an image signal of an image memory 67 (described later); a display 66 that displays the input contents of the selection key circuit 62; and a predetermined standard image ( An image memory 67 that stores images (including sentences, etc.) is connected thereto. This pattern generator 65 is connected to a control electrode driver 68 that controls the control electrode 32 of the write hand 5 based on the output write signal, and the above-mentioned voltage is supplied from the high voltage power supply 38 based on whether the pattern generator 65 is turned on or off. Output.

FIG. 5 shows a selection key provided on the console panel 70, which causes the selection key circuit 62 to output a predetermined key signal. As is clear from the illustration, these selection keys are the company name key, date key, department key, fish key, net pattern key, [phase] key, memory key, number key, alphabet key, space (SPACE) key, and execution ( E
NTER) key, etc.

In the above configuration, the operation will be explained as follows.

First, a document is placed on the platen glass 11, and then a predetermined selection key is operated from the console panel 70 to input additional information. As additional information, for example, select "Fuji Xerox■" from the "Company Name 1" key, [ from the ■ key]
Enter rs, 61.9.8J from the date key and turn on the ENTER key to display the character generator (1?OM) 63 to 0 figure pattern and rs, 61.9.8J. The character pattern ``Fuji Xerox ■'' is generated and temporarily stored in the memory (RAM) 64, and the address of the fixed phrase ``Fuji Xerox ■'' stored in the image memory 67 is specified. At the same time, the area for copying the additional information on the recording paper is manually entered using the numeric keys. This input may be performed using a tablet or the like.

Here, when the start button is pressed to issue a copy command, the photoreceptor belt 2 rotates and receives a predetermined charge in the charge corotron 3.

On the other hand, when the lamp 12 is turned on and illuminates the document on the platen glass 11, the photoreceptor belt 2 is exposed to light reflected through the lens 13, and an electrostatic latent image is formed on its surface. When the area on which the electrostatic latent image has been formed passes through the partial static elimination lamp 4, the signal electrode 51 is moved according to the area where the additional information is copied.
is driven to light up the light emitting diode, and the area of the photoreceptor belt 2 corresponding to that area is irradiated to eliminate static electricity. When this charge-eliminated area passes the write head 5, the memory (
1? AM) 64 and the stored contents at a predetermined address in the image memory 67 are read out as image signals, which are converted into write signals by the pattern generator 65 and then applied to the corresponding control electrodes 32 of the write head 5 by the control electrode driver 68. -1200V (on) or -800V
(off) DC voltage is applied.

At this time, the drive electrode 31 generates ions of ■ and ○ by applying the above-mentioned high frequency high voltage, and a DC voltage of -1000V is applied to the screen electrode 33. Therefore, when the control electrode 32 is turned on, the ion flow e is transferred from the ion guide hole 32a to the ion release hole 33a.
is generated toward the photoreceptor belt 2 through the control electrode 32.
When is turned off, the ions e are not emitted from the ion emitting hole 33a but are restrained within the write bend 5. the result,
An electrostatic charge image corresponding to the turning on of the control electrode 32 is formed in the above-mentioned static elimination area.

In this way, the electrostatic latent image and the electrostatic charge image formed on the photoreceptor belt 2 are developed with toner by the developing device 6. As the toner image on the photoreceptor belt 2 advances to the transfer area of the transfer corotron 7, a recording paper of a predetermined size fed from one of the paper feed trays 14 advances along the conveyance path 17, while being registered. , enters the transfer area and receives the transfer of the toner image on the photoreceptor belt 2 by the transfer corotron 7. The recording paper on which the toner image has been transferred is peeled off from the photoreceptor belt 2 by a corotron 8, reaches a fixing device 19 via a conveyance path 18, undergoes a fixing process, and is discharged from a conveyance path 20 to an output tray 16. be done.

FIG. 6(a) shows a recording paper 71 that has received such a record, and has additional information 1171a such as a company name, a ■ mark, and a date on the upper part, and a copy area 71b corresponding to the content of the original below.

FIG. 6(b) shows a recording paper 71c having a copy 71c of a letter corresponding to the content of the original and a checkered pattern 71d overwritten by the writing head 5.
C1 shows a recording paper 71 having an English letter 71e recorded by the writing head 5 functioning as a link.

Figure 6+a) shows additional information written into a predetermined area that has been neutralized by the partial static elimination lamp 4, while Figure 6f
bl is overwritten without performing any static elimination operation.

As is clear from the above explanation, it is possible to transfer the copy image and the additional information image in a single transfer operation, which improves the recording speed and completely takes into account fluctuations in the relative position of the two images due to overwriting. There's no need to.

Figure 7 shows two developing machines 6A in the electronic copying machine shown in Figure 1.
and 6B.

Here, since the same parts are indicated by the same reference numerals, a duplicate explanation will be omitted, but the developing device 6A is one that develops, for example, a -280V electrostatic charge image formed by the writing head 5. The bias voltage is, for example, -50V, and the developing device 6B is for developing an electrostatic latent image of, for example, -700V formed by exposure based on document scanning, and the bias voltage is, for example, -300V. . Also,
In Figure 1, a flash type exposure device was used.
Here, the difference is that a moving optical system consisting of a lamp 12, a lens 13, a reflecting mirror, etc. is used, and the transport route of the recording paper is different, but the explanation will be omitted here. In the figure, 7A is a pre-transfer corotron, and 4 is a static elimination lamp, so there is no need for partial static elimination.

In the above configuration, the operation will be explained as follows. First, after electricity is removed from the photoreceptor belt 2 by the electricity removal lamp 4, an electrostatic charge image of -280V additional information is formed by the writing head 5.

This electrostatic charge image is developed with red toner by a developing device 6A with a bias voltage of 150V. Next, the photoreceptor belt 2
After being charged to -700V by the charge corotron 3, an electrostatic latent image corresponding to the content of the document is formed on the platen glass 11 by a moving optical system including a lamp 12, a lens 13, etc. developing machine 6
Develop with black toner using B. The two-color toner image thus formed on the photoreceptor belt 2 is subjected to pre-transfer processing by the pre-transfer corotron 7A, and then transferred to the recording paper by the transfer corotron 7.

The recording paper carrying the transferred image is peeled off from the photoreceptor belt 2 by a corotron 8 and reaches a fixing device 19 after passing through a conveyance path for one day, where it undergoes a fixing process and is then discharged to a discharge tray 16. .

In the above description, the developing device 6A performs development using red toner, but development may be performed using black toner or other toner.

As is clear from the above explanation, before forming a copy image, an electrostatic charge image of additional information is formed and developed, and the additional information image and the copy image are transferred in one transfer operation. Therefore, it is possible to improve the recording speed.

Further, since the electrostatic charge image of additional information and the electrostatic latent image for copying are developed with a bias voltage corresponding to their potentials, they can be developed with the same density.

Chestnut - Tokisha Toshuno Dojo pOsara Kepi ■ Ritake Mushroom Figure 8 shows an enlarged view of the portion where the electrostatic charge image is formed on the photoreceptor belt 2 by the writing head 5, and the belt feed roller 83 The photoreceptor belt 2, which moves endlessly in the counterclockwise direction due to the rotation of the photoreceptor belt 2, is supported by a plate 80 extending across the width from the back surface of the photoreceptor belt 2 in the region where the write head 5 is located. In the figure, 4 is a partial static elimination lamp, and 6 is a developing machine.

As in the above configuration, since the photoreceptor belt 2 is pressed by the plate 80 from the back side, the photoreceptor belt 2 is pressed against the plate 80 due to the tension of the photoreceptor belt 2.
Thereby, the distance between the writing head 5 and the imaging surface of the photoreceptor belt 2 is maintained constant with high precision. At the same time, the generation of wrinkles on the photoreceptor belt 2 is prevented.

Therefore, it is possible to form an electrostatic charge image that does not cause image blur, blur, or density unevenness.

FIG. 9 shows a unit that holds the plate 80 shown in FIG. 8, in which the plate 80 is fixed to a side plate 81 and a feed roller 8 that moves the photoreceptor belt endlessly.
2.83.84.85 are rotationally supported.

In this way, by supporting the plate 80 and the feed rollers 82 to 85 on the side plate 81 and forming a unit, the configuration can be simplified and the workability of assembly can be improved.

FIG. 10(a) shows a plate 80 with a curved surface, which reduces the contact resistance with the photoreceptor belt 2 and improves the movement characteristics. 80 is supported by a holder 86 via a spring 87, and even if tension fluctuation occurs in the photoreceptor belt 2, it can be absorbed and prevent local sagging.

(3) Connection between write head and printed circuit board Figure 11 (al
, (bl, (C)) indicate a connecting portion for connecting a printed circuit board 90 including a power supply circuit, a driving circuit, etc. to the writing head 5 (FIG. 2(a)).

In FIG. 11 (al), a card edge connector 91 (described later) is electrically connected and fixed to a printed circuit board vi (motherboard) 90, and a support plate 94 fixed to a support member 93 is positioned opposite to this. The support member 93 is connected to the screen electrode 3 of the write head 5.
A flexible printed circuit board 96 is fixed to the ion emitting surface side of 3 (FIG. 2(a)) and is attached to a support plate 94 that stands upright on both sides of the aluminum base material 95.
is supported. The flexible printed circuit board 96 has an electrode pattern 97 printed on a flexible film such as polyimide, and a support plate 94 that adheres and supports this.
is made of a glass cloth epoxy laminate with a thickness of about 1.5 x* and is fixed to the support member 93 by adhesive or screwing. The electrode patterns 97 include, for example, 16 patterns for the drive electrode 31 (FIG. 2(a)) of the write head 5, 128 patterns for the control electrode 32 (FIG. 2(a)), and 1 pattern for the screen electrode 33. It consists of a total of 145 patterns. FIG. 11(b) shows the pin tip 98a electrically connected to the printed circuit board 90 and the electrode pattern 9.
For example, the card edge connector 9 includes only 145 bins 98 having contact portions 98b that come into pressure contact with the card edge connectors 98 and 7.
1 is shown in FIG. 11(C) shows a cross section of a flexible printed circuit 96 having a support member 93, a support plate 94, and an electrode pattern 97. The explanation will be omitted.

As is clear from the above explanation, the electrode connection part is placed 90 inches behind the ion emitting surface, which saves space, and since the motherboard is connected with a general-purpose card edge connector, it is inexpensive and has a long life. can be expected.

Figure 12 (a), (from bl Figure 16 (al ~ (el
shows another connection configuration between the write head 5 and the power supply circuit, drive circuit, etc. In FIG. 12 (al, (bl), the head mounting case 100 has a head mounting opening 101a and an insertion slit 101b at the bottom, a guide member 103 for moving the connector housing 102 up and down inside, and a head mounting/detachment lever on the side. A slit 105 for manipulating 104 is formed.

The connector housing 102 has a connector portion 102a having a pin therein to be connected to a connecting pin, which will be described later, and moves with the attachment/detachment lever 104 by engagement, which will be described later. Figure 13 (al, (bl is the connection pin 10 on the top)
6 and has a mounting plate 107 inserted into the insertion slit 101b of the case 100. FIG. 14 (al, (1)) shows a state in which the writing head 5 is attached to the head attachment case 100. The writing head 5 is inserted into the insertion slots l-101b at both ends of the mounting plate 1070, and the writing head 5 is inserted into the opening 101a. When the attachment/detachment lever 104 is rotated counterclockwise, the connector housing 1
02 is lowered and the connector part 102a connects to the connecting pin 106.
Connect with.

Figures 15(a) and (from bl) Figures 16(a) to (e) show the parts constituting the connection section described above.Here, the same parts are indicated by the same reference numerals, so they are duplicated. Although the explanation is omitted, the connector housing 102 is connected to the guide member 10.
3, and is formed with a retaining slit 110 that engages with and interlocks with the protrusion 111 of the attachment/detachment lever 104, and draws out the connection between the connector part 102a and the connecting pin 106 to the outside. 109 is newly illustrated.

As is clear from the above description, since the write head is provided with a substrate having connection pins and a portion of the connector is connected to the connection pins, the write head can be easily attached and detached. Further, the replacement can be performed from the front of the copying machine.

Naturally, it is possible to reduce costs and improve the reliability of the connection.

In FIG. 17(a), fbl is the write head 5 (FIG. 2(a)
)) and the control board 90.

A glass epoxy lower circuit board 120 on which an electrode pattern 97 is formed is fixed to a support member 93 (FIG. 11(a)) fixed to the screen electrode 33 (FIG. 2(a)) of the writing head 5. There is.

An aluminum substrate 95 is provided on the circuit board 120, and through holes 97 are formed in electrode patterns 97 located on both sides of the aluminum substrate 95.
a is formed. Above the lower circuit board 120,
An upper circuit board 124 made of glass epoxy is located on which a card edge connector 123 having a pin 121 inserted into the through hole 97a and a pin 122 connected to the pin 121 is fixed. The card edge connector 123 has an opening 125, above which a control '+'fl board 90 having an electrode pattern 126 is located. The pin 121 includes a pin 127 soldered to the upper circuit board 124 and a spring 129 that forces the tip contact portion 128 inserted into the through hole 97a downward.
has.

In the above configuration, the control board 90 is inserted into the opening 125 of the card edge connector 123, and the upper circuit board 1
By inserting the 24 pins 121 into the through holes 97a of the lower circuit board 120, a predetermined electrical connection is achieved.

As is clear from the above explanation, a through hole is provided in the power supply pattern of the write head board (lower circuit board), and a pin having a tip contact portion that is elastically biased downward is inserted into this through hole. Therefore, the electrode pattern on the write head substrate does not peel off or become depressed, and a proper electrical connection can be obtained.

(4) Short writing head FIG. 18 shows an electrophotographic copying machine having a writing head 5 having a short length, for example, a length of 100 mm or less in the width direction of the photoreceptor belt 2. The rest of the configuration is the same as that in FIG. 1, so the explanation will be omitted.

With the above configuration, predetermined additional information such as a company name, date, etc. can be recorded in a predetermined area within 100 nm from the edge of the recording paper. At this time, the electrostatic latent image in that area may be deleted by the partial static elimination lamp 4;
The electrostatic latent image may be overlaid with an electrostatic charge image by the writing head 5 without operating the electrostatic latent image. Shortening the write head makes it possible to downsize and simplify the drive circuit, thereby reducing costs.

FIG. 19 shows another electrophotographic copying machine with a short writing head, eg, less than 100 mm, the construction corresponding to that of FIG.

In comparison with the electrophotographic copying machine shown in FIG. 7, the difference is that a photoreceptor drum 2 is used instead of the photoreceptor belt, and that a static elimination lamp 4A is used before the charge corotron 3. The other configurations are the same, so the explanation will be omitted.

FIG. 20 (b) shows an example in which a short writing head 5 is moved in the width direction of the photoreceptor belt 2 (or drum), and the writing head 5 is suspended from a rail 130.
Further, a partial static elimination lamp 4 having a length equal to the width of the photoreceptor belt 20 is fixed to one side thereof. The writing head 5 is fixed to a belt 131, and the belt 131 is passed around a drive roll 132 and an idler roll 133.

FIG. 21 shows a control circuit for controlling the movement of the writing head 5, and includes, for example, a position input circuit 140 for inputting a writing area (address) for additional information using the numerical keys of the console shown in FIG. A recording paper size detection circuit 141 outputs a recording paper size signal in response to a button or a signal from a size sensor that specifies the recording paper size, and a recording paper size detection circuit 141 that outputs a recording paper size signal based on a signal from a button or size sensor that specifies the recording paper size, and detects the movement amount and portion of the writing head 5 based on the writing area and recording paper size. A CPU 42 that calculates the lighting area and lighting timing of the static elimination lamp 4; a drive circuit 143 that outputs a drive signal based on the amount of movement of the writing head 5 to drive the pulse motor 144; and a drive circuit 143 that calculates the lighting area and lighting timing of the partial static elimination lamp 4. It has a lamp drive circuit 145 that drives the partial static elimination lamp 4 based on lighting timing.

In the above configuration, the operation will be explained as follows. First, when the operator specifies the content of the additional information, the size of the recording paper, and the recording area of the additional information, the control circuit shown in FIG. Calculations based on the paper size and recording area are performed by the CPU 142. When the photoreceptor belt 2 carrying an electrostatic latent image based on the content of the original passes the partial static elimination lamp 4, the CPU 142 lights up the light emitting diode array over a predetermined width according to the additional information, and lights it up for a predetermined time period. Continue. Before the photoreceptor belt 2 having the electrostatic latent image from which predetermined areas have been deleted passes the writing head 5, the CPU
142 drives a pulse motor 144 via a drive circuit 143, and the belt 131 is rotated by rotation of the drive roll 132.
The writing head 5 fixed to is moved to a predetermined position. At this time, when the additional information writing area of the photoreceptor belt 2 passes, an ion flow is generated according to the content of the additional information, and an electrostatic charge image of the additional information is formed in the charge-eliminating area of the photoreceptor belt 2. Thereafter, the writing head 5 returns to the home position, and predetermined recording is performed on the recording paper by developing, transferring, and fixing the electrostatic image.

As is clear from the above description, additional information can be recorded at any position on the recording paper, regardless of the size of the recording paper, while using a short writing head.

FIG. 22 shows a control circuit for using the short writing head 5 shown in FIGS. 20(a) and 20(b) as a printer.
5 has been deleted, and on the other hand, an information width generation circuit 146 that generates a signal of the image information width (length in the main scanning direction) and a position information generation circuit 147 that generates position information of the photoreceptor belt 2 have been added. There is.

In the above configuration, the operation will be explained as follows.

The CPU 142 determines the area 150 corresponding to the recording paper on the photoreceptor belt 2 based on the size signal from the recording paper size detection circuit 141. At the same time, the position of the write head 5 is determined based on the image information width signal from the information width generation circuit 146. As a result, the pulse motor 144 is driven via the drive circuit 143, and the rotation of the drive roll 132 moves the writing head 5 fixed to the belt 131 to a position corresponding to the first writing area 151.

Thereafter, a control electric scratcher 32 (not shown) of the writing head 5 is turned on and off according to the image information to form an electrostatic charge image in the writing area 151. This state is shown in FIG. 23 (al). Next, the writing head 5 is moved from the first electrostatic charge image forming area 151A to the next writing area 152. After this, the position information generating circuit 147 When one revolution of the photoreceptor belt 2 is detected, image information is recorded in the writing area 152. This state is shown in FIG. 2(b).

As is clear from the above description, since a short writing head can be used as a printer, versatility can be increased while suppressing cost increases. In this case, a write head that generates an ion flow was used, but by charging the photoreceptor belt in advance and driving a short write head of a light emitting diode array or liquid crystal according to the image information, the electrostatic charge can be reduced. It is also possible to form a latent image.

The electrophotographic copying machine of FIG. 1 will be explained based on the flowchart of FIG. 24. First, the photoreceptor belt 2 is charged by the charge corotron 3, and the platen glass 1 is charged.
It is exposed by the light reflected from the original on 1. The electrostatic latent image formed on the photoreceptor belt 2 by exposure has a potential of -700V and is developed by a developing device 6 having a bias voltage controlled to -300V.

The toner image developed in this way is transferred to the transfer corotron 7.
The image is transferred onto the recording paper fed through the conveyance path 17, and then enters the fixing device 19 through the conveyance path 18 where it is fixed.

The fixed recording paper enters the inverter 21 from the conveyance path 20 and is stored in the duplex tray 15 from there.

Since a command to record additional information is input before this operation, the photoreceptor belt 2 cleaned by the cleaner 10 is not charged (passes through the charge corotron 3, and the image forming area is located at the writing head). When the writing head 5 reaches position 5, it is driven according to the additional information to form an electrostatic charge image on the photoreceptor belt 2.
Since the developing device 6 has a potential of V, the developing device 6 develops the electrostatic charge image based on a bias voltage controlled to -50V. Recording paper is fed from the duplex tray 15 in synchronization with the timing at which this toner image reaches the transfer corotron 7 , passes through the conveyance path 7 , undergoes registration, and is then transferred by the transfer corotron 7 . The recording paper onto which the toner image has been transferred enters a fixing device 19 via a conveyance path 18, and is discharged from a conveyance path 20 to a discharge tray 16.

As is clear from the above explanation, even if the potential of the electrostatic latent image created by ion writing is lower than the potential of the electrostatic latent image of the copying machine because the amount of charge per unit time is smaller than that of the charge corotron 3, the developing By controlling the bias voltage of the machine 6 to a predetermined value, it is possible to develop at the same density. This tendency increases as the rotational speed of the photoreceptor belt 2 increases, but it can be counteracted by controlling the bias voltage. Therefore, it is possible to increase the recording speed.

(5, 2) Attached ■ Information type Control of erasing black images in the area Partial neutralization lamp 4 of the electrophotographic copying machine shown in Fig. 1 (Fig. 3)
The lighting control circuit of is shown in FIG.

This lighting control circuit includes an area signal generation circuit 160 that generates an area signal in which additional information such as page and date is recorded, a priority signal generation circuit 161 that outputs a priority signal when the additional information has priority over document information, and a recording A size signal generation circuit 162 that generates a paper size signal, a timing signal generation circuit 163 that generates a recording paper conveyance timing signal,
a gate circuit 164 inputting the area signal and the priority signal;
Size signal, transport timing signal and gate circuit 16
It has a gate circuit 165 which inputs the output signal of No. 4.

The gate circuit 165 is connected to a control section 166 mainly including a CPU, and the control section 166 is connected to a decoder driver 167. The decoder driver 167 applies a power supply voltage Vcc to each divided group of the light emitting diode array 168.
It is connected to a transistor 169 that applies , and a transistor 170 that simultaneously grounds the corresponding transistors in each group.

In the above configuration, the operation will be explained based on the flowchart of FIG. 26 as follows. When the operator selects the content of the additional information, area designation, priority designation of the additional information, recording paper size, etc. from the console panel, the information is input to the control unit 166 via the gates 164 and 165. The control unit 166 processes this information using a predetermined program and temporarily stores the results in internal RAM. After an electrostatic latent image is formed on the charged photoreceptor belt 2 based on document scanning, when the area passes through the partial static elimination lamp 4, the control unit 166 creates an additional information image based on the contents stored in the RAM. outputs a control signal to eliminate static electricity in the region where is formed. When the decoder driver 167 inputs this control signal, it decodes it, turns on the corresponding transistors 169 and 170, and lights up the light emitting diode 168 at the position corresponding to the area where additional information is formed.

If an electrostatic latent image forming a black image is formed in the corresponding area by this lighting, it is erased. Thereafter, when that area passes through the write head 5, an electrostatic charge image is formed according to the additional information.

In the above explanation, the partial static elimination lamp 4 is used to eliminate static electricity in the area where additional information is formed, but it is also possible to eliminate static electricity in the margin area other than the image information area, and between multiple images that are formed serially. can. Naturally, instead of the partial static elimination lamp 4, an erasure lamp provided for static elimination may be used.

(5, 3) Control of the charge erasing mode of the sensitive belt No. 27
The figure is a flowchart of this control, and when the write head 5 shown in Figure 2 (al) is not used to write additional information using an ion stream, the write head 5 is used as a charge erasing means for the photoreceptor belt 2. When the control unit 40 receives this control command, the control electrode 32 receives +2
Applying a DC voltage of 00V to the screen electrode 33, Ov
Apply. As a result, the ions of ■ and θ generated by the drive electrode 31 reach the photoreceptor belt 2 through the ion discharge hole 33a, neutralize the charge on the photoreceptor belt 2, and erase the charge. In this case, the control electrode 32 has +200
Since a DC voltage of V is applied, it is possible to emit slightly positively biased AC ions, and the negatively charged photoreceptor belt 2 can be effectively neutralized.

As is clear from the above explanation, the ion flow write head 5
can be used as a charge erasing means, eliminating the need for an erase lamp and reducing costs. Furthermore, if the user is given the option of replacing the erase lamp with this write head 5 as necessary,
Furthermore, versatility can be improved.

GoL Aim-Jjil ■I Usnu Old Town” Maru I Gai Decoy (5, 4, 1)
FIG. 28(a) shows a control circuit for suppressing density unevenness due to variations in the characteristics of the writing head 5 or variations in the mounting accuracy of the corotron (for example, inclination with respect to the photoreceptor belt 2). A writing head 5 is provided with a predetermined gap from the photoreceptor belt 2, and a light emitting diode array 180 is provided on the opposite side.

The photoreceptor belt 2 has a grounding conductive region 182 on one side, and a grounding sleeve 183 is in contact with this conductive region 182. The earthing sleeve 183 is brought into contact with switches 184 and 185, the switch 184 is opened and closed with the earth, and when the switch 185 is turned on, it is earthed through a resistor R (for example, IOMΩ).

Voltage detection circuit 181 for detecting the terminal voltage of resistor R
is connected, and the detected value of the voltage detection circuit 181 is input to the CPU of the control unit 40 after digital conversion. The control section 40 has this CPU, a program ROM, an RA gate for temporarily storing data, etc., and a non-volatile RAM for storing a set voltage, which will be described later. (a), (b)), control electrode 32 (
The power source 3 applies the aforementioned set voltage to the screen electrode 33 (FIG. 2 (al, (b)) and the screen electrode 33 (FIG. 2 (al, (b)).
7, 38, and 39, and the control electrode power supply 38 applies the aforementioned set voltage to each of the 12 divided control electrodes 32 (FIG. 2), for example, via the divided drive circuit 186. The writing head 5 has a length of 24 mm for A4 size, for example.
0SPI, 2796 dots are used, and 233 dots are allocated to each division unit by 12 divisions.

In the following explanation, only the control electrode 32 is divided into 12 to perform divided drive control, but the drive electrodes 31 (FIG. 2(b)), which are normally arranged in parallel on six sides, and the single screen electrode 33 are also used. It may be divided into 12 parts and driven separately.

In the above configuration, with the light emitting diode array 180 turned on and the photoreceptor belt 2 made conductive, Va=3KV (IMI(z)) is applied to the drive electrode 31, and Vs=-1000V (DC) is applied to the screen electrode 33. Apply
Each divided unit 1.2-.
A negative DC voltage is sequentially applied to the 12 groups of 2. In each divided unit, the current flowing through the resistor R is 10 μA based on the output of the voltage detection circuit 181 (terminal voltage IV of the resistor R).
Adjust the control electrode voltage from -1000V to -1150V so that
The voltage is controlled within the range of 0V, and the voltage is stored in the nonvolatile RAM as a set voltage for subsequent operations.

FIG. 28(b) shows the set voltages stored in the nonvolatile RAM.

This operation is performed at the time of factory shipment or during service mode. In normal copying operations, switch 184 is turned on, switch 185 is turned off, and write head 5 is controlled based on the set voltage stored in the nonvolatile RAM. In the above explanation, only the control electrode voltage was controlled, but the drive electrode voltage or screen electrode voltage may also be controlled.

As is clear from the above explanation, since the drive voltage is divided and controlled so that the ion flow is constant throughout the write head, even if the mounting accuracy of the write head varies, unevenness in the developed density due to uneven charging can be avoided. This also eliminates unevenness in developed density due to variations in the characteristics of the writing head in the longitudinal direction.

Figure 28 (Al's control system controls changes in temperature and humidity,
It may be used to suppress fluctuations in charge density due to aging of the write head 5.

In this case, there is no need to drive the write head 5 in parts. Here, the resistor R is set to IKΩ, and the voltage of the control voltage 32 is controlled so that the output of the voltage detection circuit 181 becomes 10 V (current value is 1 mA).

This voltage control is 50V in the range of -600V to -1500V.
It is sufficient that the detection voltage is a value of IOV±5% by step control of V.

5.4.2) Figure 29 shows a device that suppresses fluctuations in the surface potential of an electrostatic image due to changes in temperature and humidity, deterioration of the window material, deterioration of the writing head, etc., and has an image forming area 2A. A surface potential measurement area 2 with a width of 20 mm is provided on one side of the photoreceptor belt 2.
B is provided.

This photoreceptor belt 2 is supported by a feed roll 83, and a potential sensor 190 is placed opposite the surface potential measurement area 2B.
is provided. The writing head 5 has a length of 340mm so that it can print A4 horizontal size, and the portion corresponding to the surface potential measurement area 2B generates an ion flow regardless of the recorded information. The potential sensor 190 is connected to the control section 40, and the control section 40 has a configuration for controlling the power supply circuit 191 of the write/rad 5 and the bias voltage of the developing device 6.

In the above configuration, when the writing head 5 starts forming an electrostatic charge image of additional information, or prior to that, the surface potential measurement area 2B is charged, and the potential sensor 190 measures the charged potential. The control unit 40 is a potential sensor 190
The output is compared with a reference value previously stored inside, and the power supply circuit 191 is controlled based on the deviation to control the electrodes (drive, control, and screen electrodes, or one or two of them) of the writing head 5. control the voltage applied to the In addition to or in place of this, the bias voltage of the developing device 6 is controlled.

(5, 4, 3) FIG. 30 indicates that the writing head 5 should be replaced due to deterioration and stops the writing operation by the writing head 5. A potential sensor 190 is provided to measure the surface potential of the electrostatic charge image produced by the write head 5.
The potential sensor 190 is connected to a comparator 200 for comparison with a first level E1 and a comparator 201 for comparison with a second level E2 (El>Ez). The comparators 200 and 201 are connected to the control unit 40 and
0 is connected to a replacement indicating diode 204 or an operation stop indicating diode 205 via ports 202 and 203.

In the above configuration, when an electrostatic charge image of additional information is formed on the photoreceptor belt 2 by the writing head 5, the potential sensor 190 detects its surface potential. In the normal case, since the output E of the potential sensor 190 is E>El and E>EZ, the control unit 40 does not light the light emitting diodes 204 and 205 and does not output a stop signal. On the other hand, due to deterioration of the write head 5, the surface potential decreases and E<El, E>
When Ez is reached, the light emitting diode 204 is turned on by outputting a deterioration signal from the boat 202 and turning on the transistor.
lights up to prompt the operator to replace the write head 5. If the write head 5 continues to be used without being replaced despite the indication that the writing head 5 should be replaced, the surface potential will further decrease to E<El, E<EZ, and the control unit 40 will switch off the light emitting diodes 204 and 205. Both are turned on and the operation of the write head is stopped by a stop signal.

As is clear from the above explanation, since the deterioration of the write head 5 is displayed, the write head 5 can be replaced before image quality deterioration occurs, and if it is not replaced, the operation is stopped, so the image quality is reduced. It can prevent bad records from being made.

(5, 4, 4) In Fig. 31(a), a writing head 5 is provided on the photoreceptor belt 2 with a gap of g = 230 μm, and the writing head 5 is connected through a resistor R of IMΩ. Counter electrode (e.g., 0.3 mm copper plate) 2
It has 10. The terminal voltage of the resistor R is determined by the voltage detection circuit 1.
81, and the configuration of the subsequent stages is the same as that shown in FIG. 29. FIG. 31(b) shows the structure of the writing head 5 in the portion where the counter electrode 210 is located,
In a configuration having a drive electrode 310, a control electrode 320, a screen electrode 330, and an insulator 340, 350, 360, the configuration corresponds to the configuration in FIG.
1(e) shows the write head 5, the part to the left of the boundary line A is the part that generates an ion flow toward the aforementioned counter electrode 210, and the part to the right of it is the part that generates the ion flow toward the photoreceptor belt 2. This is an image forming part that generates an ion flow. Here, the control electrode 320 has a size of 2.5×2.5 c+n, and is configured to emit a large amount of ions toward the counter electrode 210 by providing a large number of ion emitting holes.

In the above configuration, when the writing head 5 is driven, an electrostatic charge image corresponding to additional information is formed on the photoreceptor belt 2, and a current corresponding to the ion flow flows from the counter electrode 210 via the resistor R. . The control section 40 includes a voltage detection circuit 181
The power supply circuit 191 is controlled so that the detected voltage value becomes IV (the current value is lμA), and the electrode voltage of the write head 5 is set to an appropriate value. At the same time, the bias voltage of the developing device 6 may be controlled.

Here, the distance between the writing head 5 and the photoreceptor belt 2 is 23.
Although it can be attached with a high precision of 0 μm±50 μm, since the counter electrode 210 is provided on the outside of the photoreceptor belt 2, the attachment is easy.

As is clear from the above explanation, since the drive voltage of the write head is set by directly measuring the charge density, images with constant density can be formed regardless of changes in temperature, humidity, head deterioration, etc. It can be carried out.

FIG. 32(a) shows a writing head 5 that forms an electrostatic charge image of additional information on the photoreceptor belt 2 supported by a feed roll 83.
is provided, and heaters 220 are provided on both sides of the write head 5.
is provided.

A temperature sensor (thermistor) 230 is attached to the heater 220, and a temperature sensor (thermistor) close to the heater 220 detects the temperature of the photoreceptor belt 2.
240 are provided. The temperature sensors 230 and 240 are connected to R/V converters 231 and 232 that perform resistance/voltage conversion, and the outputs of the R/V converters 231 and 232 are connected to the control unit 4.
It is set to be input as 0. The control unit 40 performs arithmetic processing on the outputs of the R/V converters 231 and 232,
A switching transistor 223 is connected to its output side via a boat 233. The emitter of the switching transistor 223 is grounded, and the collector is connected to the heater 220 (attached to the write head 5).
The heater 220 is connected to the temperature fuse 221.
It is connected to the power supply Vc via. FIG. 32(b) shows a contact type temperature sensor using a thermistor, and the heater 22
Bracket 25
The temperature sensor 230 is brought into close contact with the heater 220 via the polyimide tape 252 by being elastically compressed by the chloroprene rubber 253 molded and fixed to the temperature sensor 230 . Note that 251 is a signal lead wire of the temperature sensor 230.

In the above configuration, when a signal of "1" is output from the control section 40 to the transistor 223 via the boat 233, the transistor 223 is turned on and the heater 220 is activated. The writing head 5 is heated by the operation of the heater 220, and the atmosphere in which the ion flow is generated is dehumidified to suppress a decrease in charge density. Here, the control unit 40 uses the temperature sensor 230
, 240, the temperatures of the write head 5 and photoreceptor belt 2 are input via R/V converters 231, 232. At this time, if the temperature of the photoreceptor belt 2 exceeds, for example, 40° C., the transistor 223 is turned off and the operation of the heater 220 is stopped. This prevents the photoreceptor belt 2 from losing photoconductivity due to crystallization.

Photoconductivity may generally be lost between 40 and 60°C.

On the other hand, if the temperature of the photoreceptor belt 2 is below a predetermined value,
The heater 220 is appropriately turned on and off based on the temperature of the write head 5 to control the temperature within a predetermined range.

In FIG. 33, the control section is replaced with a hardware circuit configuration, and when the temperature of the heater 220 is low, the temperature sensor 2
The resistance value of 30 becomes large, and the output of the differential amplifier OA becomes large. Differential amplifier DA, Zener diode ZD
A reference voltage is input to the negative terminal from a parallel circuit of capacitor C and capacitor C. When the output becomes large, the diodes are turned on, turning on the transistor 223 and operating the heater 220. When the temperature of the photoreceptor belt 2 increases due to the operation of the heater 220, the resistance value of the temperature sensor 240 decreases, and the output of the differential amplifier DA2 decreases. The reference voltage is equal to the reference voltage mentioned above. When the output of the differential amplifier DA2 becomes small, the difference with the output of the differential amplifier DA becomes large and the diode D2 is turned on, so the diode group DI is turned off and the transistor 223 is turned off.
The operation of heater 220 is stopped.

(6,2) Humidity sensor FIG. 34(a) shows a humidity sensor 255 attached to the screen electrode 33 of the writing head 5 shown in FIG. 2(a). The humidity sensor 255 is, for example, shown in FIG.
1 and (C), after screen printing a pair of comb-shaped gold electrodes 257 on an alumina substrate 256, a solution of styrene sulfonate, which is a moisture sensitive material, and a crosslinking agent added thereto is applied to the alumina substrate 256. The moisture sensitive film 258 is formed by coating the film on top and irradiating it with ultraviolet rays to perform crosslinking and polymerization. A protective film 259 is provided on the humidity sensitive film 258, and is of a type that, for example, reduces electrical resistance when humidity increases. Note that 257a is a terminal lead.

FIG. 35 shows a control circuit using this humidity sensor 255, which is composed of a humidity detection circuit . Now, when the humidity increases and the resistance value of the humidity sensor 255 decreases, the output of the differential amplifier DA3, which inputs the reference voltage controlled by the Zener diode ZD to its positive terminal, increases. When this output becomes large, the output of the differential amplifier DA4 becomes large, and the emitter output of the transistor TR becomes large, and the primary side voltage of the transformer T becomes large, causing the drive electrode 31 of the write head 5 to become large. Increase the level of high frequency voltage applied. In addition, the transistor TR, capacitor C, C,
, C4, inductance L, etc. constitute a high frequency oscillation circuit.

36(a) and 36(b), for example, a heating element pattern 261 is formed on the writing head 5 shown in FIG. It is formed on the insulation N260 of alumina (A lz 03 ) provided on the screen electrode 33. As mentioned above, the gap between the writing head 5 and the photoreceptor belt 2 is 230 μm±5 μm.
The total thickness of the heat generating layer N (resistance layer) 261 and the insulating layer 260 is desirably 200 μm or less since the precision is maintained at a high accuracy of approximately 200 μm. For insulation N260, in addition to alumina and ceramic, Sing, glass glaze mainly composed of PbO, etc. are suitable, and for heat generating N261, in addition to PPd-0-A type, heg-Pd type, Au-Pt type are suitable. Insulating/resistive materials used in conventional thick film processes, such as, can be used. Note that the heat generating layer 261 may be a sheet resistor formed over the entire surface without being patterned. In this case, ion release holes must be formed on that surface.

As is clear from the above description, since only the narrow gap between the writing head 5 and the photoreceptor belt 2 is heated, it is possible to reduce the power consumption and shorten the warm-up period.

(6, 4) Moisture absorbent FIGS. 37(a) and (bl) are used to surround the atmosphere with the case 271 when an electrostatic charge image is formed on the photoreceptor belt 2 supported by the feed roller 83 by the writing head 5. ,
A desiccant 274 such as silica gel is enclosed in a case 271 to dehumidify the inside thereof. 273
is a metal plate that fixes the desiccant 274 and is provided with a hole for breathing, and is also a metal plate that fixes the desiccant 274.
A sponge 272 is placed between them to enhance the dehumidification effect inside the case 271. The perforated metal plate 273 may be replaced with a mesh or the like. Note that 4 is a partial static elimination lamp.

In FIG. 38, the photoreceptor belt 2 is replaced with a photoreceptor drum 2, and the same parts are indicated by the same reference numerals, so redundant explanation will be omitted.

As is clear from the above description, since the ion flow generation atmosphere can be dehumidified with a simple structure, ions with a predetermined charge density can be generated without increasing costs.

Further, it is also possible to prevent the writing head 5 from becoming dirty.

(6, 5) Dry hole air blowing FIG. 39 (al, (bl) is a device that forcibly blows dry air into the ion flow generation atmosphere, and partially eliminates static electricity by facing the photoreceptor belt 2 supported by the feed roller 83. A lamp 4 and a writing head 5 are provided, and an air duct 284 is positioned so as to surround the writing head 5.
Dehumidifying filter 2 supported by cover 281 at the tip of 4
82 and a blower fan 283 are provided. 40th
Figures (al and b) show a dehumidifying filter 282, with sponges or nets 290 placed on both sides, and a case 290 placed between them.
A desiccant 274 such as silica gel held by 91 is housed therein. The desiccant 274 is divided into a plurality of parts, and a gap 292 is formed between them.

In the above configuration, when the write head 5 starts writing additional information, the blower fan 283 is driven and blows the air that has passed through the dehumidification filter 282 around the write head 5 . Therefore, the ion generation atmosphere of the write head 5 is dehumidified, and stable ion generation can be obtained.

(6, 6) Revised ion emission L Figure 41 shows the write head 5, with a drive electrode 31,
The control electrode 32 has an ion guide hole 32a, and the screen electrode 33 has an ion release hole 33a. It has the shape of

As described above, since the ion emitting holes are made longer in the process direction, recording speed can be increased without increasing the drive voltage.

[Effects of the Invention] As explained above, according to the ion flow generation type electrostatic recording device of the present invention, the surface potential of the electrostatic latent image forming body is detected at the subsequent stage of the ion flow generation means, and the ion flow is detected based on the surface potential of the electrostatic latent image forming member. By controlling the driving voltage of the ion flow generation means, it is possible to suppress changes in image density due to changes in the characteristics of the ion flow generation means, temperature, humidity, etc., and also to accurately determine when to replace the ion flow generation means. can be known.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an electrophotographic copying machine equipped with an ion flow generation type electrostatic recording head, FIGS. 2(a) and ('b) are explanatory diagrams showing an ion flow generation type electrostatic recording head, and FIG. FIG. 3 is an explanatory diagram showing a partial static elimination lamp, FIG. 4 is a block diagram showing a control system, and FIG. 5 is an explanatory diagram showing a console panel.
6 fa), (b), (C1 is an explanatory diagram showing recording on a recording medium, and FIG. 7 is an explanatory diagram showing another electrophotographic copying machine equipped with an ion flow generation type electrostatic recording head. 10 (a) and (b) from FIG. 8 are explanatory diagrams showing the plate and support means for supporting the flexible endless photoreceptor belt, and FIG. 11 (a), (b), (from C1, FIG. 17 (a) , (bl is an explanatory diagram showing the connection part between the ion current generation type electrostatic recording head, the power supply circuit, and the electrostatic recording head, and FIG. 18 and FIG. An explanatory diagram showing an electrophotographic copying machine, FIG. Explanatory diagram showing the positional relationship between the ion flow generation type electrostatic recording head and the photoreceptor belt, Part 2
Figure 4 is a flowchart of control for recording additional information, Figure 25 is a block diagram of a control circuit that erases an electrostatic latent image based on exposure according to the recording area of additional information, and Figure 26 is a flowchart of a control circuit for recording additional information.
5 is a flowchart of the control circuit, FIG. 27 is a flowchart of control for neutralizing the charge on the photoreceptor belt by the ion flow generation type electrostatic recording head, and FIG. 28 (al, (
bl shows control for dividing and driving the ion flow generation type electrostatic recording head, (a) is a block diagram, and (b) is a nonvolatile RA
An explanatory diagram showing the memory contents of M, from Fig. 29 to Fig. 31 (a
), (b), and (C) are explanatory diagrams of the detection means for detecting the surface potential of the photoreceptor belt. Explanatory diagram showing the means of detection, Fig. 34(a), φn, (
C) and FIG. 35 are explanatory diagrams and circuit diagrams showing the humidity detection means and its circuit in the additional information recording area, and FIG. 36 (
al, (b) is an explanatory view showing a heater that heats the ion flow generation type electrostatic recording head, and Figs. , Fig. 41 is an explanatory diagram showing an ion flow generation type electrostatic recording head.
−・・Photoconductor 3−・・−1−−−・−・・−・Charge corotron 4
・−・−・−−−−−−−−・Partial static elimination lamp 5
・−・−−−−〜・−・・−・Ion flow generation type electrostatic recording head 6.6A, 6B−−−−・−−−−−−1 Developing machine 7−・−・−・− ---One transfer corotron 8...
−・−・−・−・−・Tetaftacolotron 9 ・・−・
---------...---Pre-cleaning corotron 10-----1---Cleaner 11-----1-----1--Platen glass 12 −・−−−
---1...-Lamp 13-----------Lens 14--
−・−・−１−−−−・Paper feed tray 15−−−−・−・
-111---Dublex tray 16...-
・・−１−−・−・Ejection tray 17.18.20.2
2・−・−・−・−Transport passage 19−・・−1−−−−
---Fuser 21-----11-----
Inverter 23--------=--Sorter 31------Drive electrode 3
2---------1----Control electrode 32a
−・・−・−−1−−−−・Ion guide hole 33−−−
------・-------・- Screen electrode 33a
---------1・-・-・Ion release hole 34.35.
36・−・−・−−−−・・・Insulator 37−・−・−
---High frequency power supply 38------------Control electrode power supply 39--
−・−−−−−−−−−・Screen electrode power supply 40
・・・−・−−−−−−−・Control unit 41−−−−−・−
・−・・−Potential sensor 70−−−−−−−−−−−−
---Console panel 71-------
-1 recording paper 71a, 71d -・---------
---Additional information 71b, 71c----
---Copy image 71e -・-・-----1-----Printer image 80--・---・------1-・Plate 8
1-・-・・Side plate 82.83
．． 84.85...--------Feed roller 86
−・・−・−・−−−−m−・−Holder 87−−−−
−−−−−−−−・−・・Spring 90・−・−−−
-1--・-・Printed board 91.123 − ・-・・-
・・Card edge connector 93−−−−−−−−−−
−−−−1・Support member 94−=・・−・−・−・−
・Support board 96--・-------Flexible printed circuit board 97------ Electrode pattern 98 a, 98 b --- ---
Pin 102 - - - - - Connector housing 104 - - - - - - Lever 106 - - - - - - - - - - - - -・Pin 10
7 ・−1−−−−−−−−−−−−Mounting plate 109
...-----------Wire harness 121-----Pin 130------Rail 13
1 --------------・-・・・・Belt 132-・・
−・−・−・−・Drive roll 133 ・−−1−−
−−・−・−Idler roll 150 ・−・−・・
----Recording paper size 151.152...
・・Write head recording area 168 --・-------1・
−Light emitting diode 183 for static elimination−・・−・・−・・・
-Current detection sleeve 190--・---1----Potential sensor 210--・-------------・Ion flow detection opposing sensor 220--・--・--・---- Heater 2
30.240 −・・−−−−−−−−1−−−Temperature sensor 255 −−−−−−−−・−−−−−−・Humidity sensor 256 −−−11111 ...-Substrate 257 -...------- Electrode 258
−・・−−−−−1−−−・Thermosensitive layer 259 −−−
−−−−−−−−−−・・Protective layer 261 ・−1～
−−−−−−−−−−−・Resistance layer 272 −−−−−−
−−−−−−−−・Sponge 274−・−・−1−−
-------Drying agent 282 ・・-----m--
---- Dehumidifying filter 283 ・------1---1 Ventilation fan 290 ・-------
--- Sponge 291 ---
--Case 310 --- Drive electrode 320 ---- Control electrode 33
0 ------------・---- Screen electrode patent applicant Fuji Xerox Co., Ltd. Representative Patent attorney Taira 1) Tadao Figure 2 (a) Figure 3 Figure 4 Figure 8 Figure 9 Figure 1O tσ (b) Figure 1I (b)
(c) Figure 13 Figure 14 rσ (b
) 5 Figure 15 (σ) (b) Figure 19 Figure 20 (a) Figure 21 Figure 23 (a) (b) 51A Figure 26 Figure 27 Figure 31 (a) Figure 32 rσノ (b) 250 Figure 33 Figure 34 (b)
(C) Figure 35 C Figure 36 Figure 38 Figure 37 tσ 5 Figure 39 (a) (b) Figure 41

Claims (4)

[Claims] (1) In an electrostatic recording device equipped with an ion current generating means that generates an ion current according to an image signal to form an electrostatic latent image on the surface of an electrostatic latent image forming body such as a photoreceptor or dielectric, a potential detection means disposed after the ion flow generation means; and a control means for controlling a driving potential of the ion flow generation means based on the surface potential of the electrostatic latent image forming body detected by the potential detection means. An ion flow generation type electrostatic recording device comprising: (2) The ion flow generation type electrostatic recording device according to claim 1, wherein the potential detection means detects the potential of a surface potential measurement area formed on one side of the electrostatic latent image forming body. (3) The ion flow generation type electrostatic recording according to claim 1, wherein the control means includes a storage means that stores a reference value with which the surface potential detected by the potential detection means is compared. Device. (4) The ion flow generation type electrostatic recording device according to claim 1, wherein the control means controls the developing bias voltage of the developing means.