JPS63112166A - Electrophotographic copying machine with ion flow generating type electrostatic recording head - Google Patents

Abstract

PURPOSE:To contrive a lower cost, by providing an ion flow generating type electrostatic recording head reduced in length according to the length of added information and simplified in construction through a reduction in the number of driving circuits. CONSTITUTION:Based on a size signal from a recording paper size detecting circuit 141, a CPU 142 judges a region 150 on a photosensitive belt 2 which region corresponds to a recording paper, and simultaneously, determines the position of a writing head 5 based on an image information width signal from an information width generating circuit 146. As a result, a pulse motor 144 is driven through a driving circuit 143, and the head 5 fixed to a belt 131 is moved to a position corresponding to the first writing region 151 by rotating a driving roll 132. Thereafter, controlling electrodes in the head 5 are turned ON and OFF according to image information, thereby form an electrostatic charge image in the writing region. Next, the head 5 is moved from the first electrostatic charge image forming region 151A to the next writing region 152. Since the writing head small in length is used as a printer, versatility can be enhanced while preventing the cost from being raised.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is an ion flow generating type that has a shortened electrostatic recording head that generates an ion flow according to image information added to a copied image according to the contents of a document. The present invention relates to an electrophotographic copying machine equipped with an electrostatic recording head.

[Conventional technology]

As an electrophotographic copying machine equipped with a conventional ion flow generation 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 latent image to distinguish it from an electrostatic latent image based on exposure), and an ion flow generating means for forming an electrostatic latent image based on exposure as necessary. It has a static eliminating means for erasing the 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 you specify image information such as departments (hereinafter referred to as additional information) from the console panel and turn on the start button,
An electrostatic latent image based on the exposure means and an electrostatic charge image based on the ion flow generation means are formed on the photoreceptor drum, which are developed by the developing means and then transferred to a recording medium by the transfer means to record the transferred image. When the image is fixed on the recording body, a record having a copy of the original content and an additional information image is obtained on the recording body.

[Problem that the invention seeks to solve]

However, according to an electrophotographic copying machine equipped with a conventional ion current generation type electrostatic recording head, although the length of the additional information in the main scanning direction is usually not that long, the ion current generation type electrostatic recording head is Since it has a length that covers the entire recording area in the scanning direction, there has been a limit to cost reduction.

[Means for solving problems]

The present invention has been made in view of the above, and in order to further reduce costs, the ion flow generation type electrostatic recording head is shortened in accordance with the length of additional information, and the number of drive circuits is reduced and simplified. The present invention provides an electrophotographic copying machine equipped with an ion flow generation type electrostatic recording head.

Hereinafter, an electrophotographic copying machine equipped with an ion flow generation type electrostatic recording head of the present invention will be described in detail.

〔Example〕

(1) Basic system configuration Figure 1 shows an electronic copying machine equipped with an ion flow generation 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 detangling corotron 8 that facilitates the separation of the recording paper from the photoreceptor belt 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 Above the exposure area of the photoreceptor belt 2, a platen glass 1) for placing an original is provided, and below it is a lens 13 for exposing the photoreceptor heald 2 to light reflected from the original illuminated by a lamp 12. 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 .

FIG. 2 (al and bl indicate the above-mentioned writing head 5,
Basically, the drive electrode 31 is driven by a high frequency voltage of, for example, IMHz, 3KV (peak-to-peak), and the drive electrode 31 is turned on (for example, -1200V) in response to a write signal.
DC voltage), off (e.g. -aoov DC voltage)
and a screen electrode 33 to which, for example, a DC voltage of -1000V is applied to reduce the influence of electric charge on the photoreceptor belt 2. Each electrode 31.3
2.33 has an insulator 34.35.
36, the control electrode 32 has an ion guide hole 32a, and the screen electrode 33 has an ion release hole 33.
It has a. In addition, in FIG.
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; 41 is a control section that detects the surface potential of the photoreceptor belt 2; It is a potential sensor that inputs to the Here, the ion guide holes 32a of the control electrode 32 and the ion discharge holes 33a of the screen electrode 33 are formed at a density of, for example, 240 dots/inch in the main scanning direction.

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, a memory (RAM) 64 that temporarily stores an image signal based on a pattern generated from the character generator (ROM) 63 as specified by the CPU 61, and an image of the memory (RAM) 64 or an image memory 67 to be described later. A pattern generator 6 that generates a predetermined pattern signal based on the signal.
5, a display 66 that displays the input contents of the selection key circuit 62, and an image memory 67 that stores predetermined images (including text, etc.) are connected. This pattern generator 65 is connected to a control electrode driver 68 that controls the control electrodes 32 of the write head 5 based on the write signal to be output, 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, patient key, network 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 1), and then a predetermined selection key is operated from the console panel 70 to input additional information. As additional information, for example, enter "Fuji Xerox ■" from the "Company Name 1" key, @ mark from the [Yes] key, rs, 61.9.8J from the date key, and turn on the ENTER key. Then, the graphic pattern ``■'' and the character pattern rs, 61.9.8J are generated from the character generator (ROM) 63 and are temporarily recorded in the memory (RAM) 64, and then stored in the image memory 67. The address of the fixed phrase "Fuji Xerox ■" is specified. At the same time, the user inputs the copy area of the additional information on the recording paper 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 1), the photoreceptor belt 2 is exposed to light reflected by 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 (
RAM) 64 and image memory 67 at a predetermined address 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 hend 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 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 ion is turned off, the ions e are not emitted from the ion ejection hole 33a but are confined within the write head 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 cocotron 7. The recording paper to which the toner image has been transferred is peeled off from the photoreceptor belt 2 by the digital corotron 8, passes through the conveyance path 18, reaches fixing n19, undergoes a fixing process, and is discharged from the conveyance path 20 to the output tray 16. Ru.

FIG. 6(a) shows a recording paper 71 that has received such a record, and has additional information 71a 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 it.

FIG. 6(b) shows a recording paper 7iC 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.
C) shows a recording paper 71 having an English letter 71e recorded by the writing head 5 functioning as a printer.

Figure 6(a) shows additional information written in a predetermined area that has been neutralized by the partial static elimination lamp 4;
b) is the result of overwriting 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, which is formed by scanning the original (by exposure), and the bias voltage is, for example, -300V. Also,
In Figure 1, a flash type exposure system 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 document content is formed on the platen glass 1) by a moving optical system having a lamp 12, a lens 13, etc. 300v 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 the digital corotron 8, reaches the fixing device 19 via the conveyance path 18, undergoes a fixing process there, and is then discharged to the 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.

□2) Maintaining the flatness accuracy of the photoreceptor belt FIG. The phosphor belt 2, which moves endlessly in the direction, is supported by a plate 80 extending across the width from the back surface of the belt 2 in the region where the writing 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 800 with a curved surface, which reduces contact resistance with the photoreceptor belt 2 and improves movement characteristics. 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 sag etc. from occurring.

(3) Connection between write head and printed circuit board 1) Figure (a)
, (bl, (C1) indicates a connecting portion for connecting the write head 5 (FIG. 2(a)) to a printed circuit board 90 including a power supply circuit, a drive circuit, etc.

1) In FIG. 1(a), a card edge connector 91, which will be described later, is electrically connected and fixed to a printed circuit board Fi (motherboard) 90, and a support plate fixed to a support member 93 faces it. 94 is located. The support member 93 is fixed to the ion emitting surface side of the screen electrode 33 (FIG. 2(a)) of the write head 5, and is adhered to support plates 94 that are positioned upright on both sides of the aluminum base material 95. It supports a flexible printed circuit board 96 provided therein. The flexible printed circuit board 96 is made by printing an electrode pattern 97 on a flexible film such as polyimide, and the support plate 94 that supports it by adhering it is made of a glass cloth epoxy laminate with a thickness of about 1.6 inches. It is fixed to the support member 93 by adhesive or screwing. The electrode pattern 97 is, for example, one for the drive electrode 31 of the write head 5 (FIG. 2(a)).
6 patterns, 128 patterns for the control electrode 32 (FIG. 2(a)), and 1 pattern for the screen electrode 33, for a total of 14 patterns.
Consists of 5 patterns. 1) Figure (bl is printed circuit board 9
FIG. As is clear from the illustration, the card edge connector 91 has an opening 99 into which a support plate 94 having a flexible printed circuit board 96 is inserted and fitted. Note that FIG. 1) (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, but since it is obvious from the illustration, the explanation will be omitted.

As is clear from the above explanation, the electrode connection part is placed 90' away from 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.

From FIGS. 12(a) and (bl), FIGS. 16(a) to (e) show other connection configurations between the writing head 5 and the power supply circuit, drive circuit, etc. FIGS. 12(al, (kl)) The head mounting case 100 has an opening 101a and an insertion slit 101b for attaching the head and gutter at the bottom, a guide member 103 for moving the connector housing 102 up and down inside, and a slit 105 for operating the head attachment/detachment lever 104 on the side.
is formed.

The connector housing 102 has a connector portion 102a having a pin therein to be connected to a connecting pin described later, and moves with the attachment/detachment lever 104 by engagement described later. Figure 13 fal, (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. 14 fa) and (b) show the 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 107, and the writing head 5 is positioned in the opening 101a. When the attachment/detachment lever 104 is turned counterclockwise, the connector housing 102
is lowered and the connector portion 102a connects with the connecting pin 106.

From Figure 15 (al, (b)) to Figure 16 (a) - (el
indicates the parts constituting the connection section described above. Here, since the same parts are indicated by the same reference numerals, a duplicate explanation will be omitted, but the connector housing 102 is different from the guide member 1.
03, and has an engaging portion 108 that engages with the attachment/detachment lever 104.
Engagement sling +-1i that engages and interlocks with the protrusion 1)1
o, the connector part 102a and the connecting pin 106
A new configuration is illustrated in which a wire harness 109 is provided to draw the connection to the outside.

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.

FIGS. 17(a) and 17(b) show the writing head 5 (FIG. 2(a)
)) and the control board 90.

A lower circuit board 120 made of glass epoxy on which an electrode pattern 97 is formed is fixed to a support member 93 (FIG. 1(a)) fixed to the screen electrode 33 (FIG. 2(a)) of the write head 5. ing.

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 board 90 having an electrode pattern 126 is located. The pin 121 has a pin 127 that is 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.

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.

FIG. 18 shows an electrophotographic copying machine having a short writing head 5, for example, 100 mm or less in length in the width direction of the photoreceptor belt 2. FIG. 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 company name, date, etc. can be recorded in a predetermined area within 100 fins 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 being operated. Shortening the write head makes it possible to downsize and simplify the drive circuit, thereby reducing costs.

FIG. 19 shows another electrophotographic copying machine having a short writing head, for example less than 10 (hm), 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.

20(al) and (b) show a case 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 2 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.
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 writing head 5 fixed to the belt 131 is moved to the position corresponding to the first writing area 151 by rotation of the driving roll 132.

Thereafter, the control electrode 32 (not shown) of the write head 5 is turned on and off according to the image information to form an electrostatic charge image in the write 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 reducing cost. 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.

(5) Program control for forming additional information The electrophotographic copying machine shown in FIG. 1 will be explained based on the flowchart shown in FIG. 24. First, the photoreceptor belt 2 is charged by the charge corotron 3 and exposed to light reflected from the original on the platen glass 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 -300ν.

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 on which the toner image has been transferred passes through the conveyance path for one day, enters the fixing device 19, and is discharged from the conveyance path 20 to the 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 20 increases, but it can be counteracted by controlling the bias voltage. Therefore, it is possible to increase the recording speed.

(5, 2) Control of erasing black images in additional information forming areas FIG. 25 shows a lighting control circuit for the partial static elimination lamp 4 (FIG. 3) of the electrophotographic copying machine shown in FIG. 1.

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 that receives an area signal and a priority signal as input, a size signal, a transport timing signal, and a gate circuit 1
It has a gate circuit 165 which inputs the output signal of No. 64. The gate circuit 165 has a control section 166 centered on the CPU.
The control unit 166 is connected to the decoder driver 167
It is connected to the. The decoder driver 167 applies a power supply voltage Vc to each divided group of the light emitting diode array 168.
It is connected to a transistor 169 that applies c and a transistor 170 that simultaneously grounds the corresponding transistors between 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 charge erasing mode of sensitive belt FIG. 27 is a flowchart of this control. When additional information is not written by ion flow in the write head 5 shown in FIG. This control utilizes the writing head 5 as a charge erasing means for the photoreceptor belt 2.Control unit 4
0 receives this control command, +20 is applied to the control electrode 32.
A DC voltage of 0V is applied, and Ov is applied to the screen electrode 33. As a result, the ions (2) and (e) 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 +200V
Since a DC voltage of
C ions can be released, 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.

d@Control for suppressing density unevenness (5, 4, 1) Fig. 28 (al is the variation in the characteristics of the writing head 5 or the variation in the installation accuracy of the corotron (
For example, a control circuit for suppressing density unevenness caused by tilting of the photoreceptor belt 2 with respect to the photoreceptor belt 2 is shown. 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. (al, (b)), control electrode 32 (
The power source 3 applies the above-mentioned set voltage to the screen electrodes 33 (FIGS. 2(a), (b)) and the screen electrodes 33 (FIGS. 2(a), (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,
233 dots are assigned to each division unit by 12 divisions.

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

In the above configuration, with the light emitting diode array 180 turned on and the photoreceptor heald 2 made conductive, V = 3KV (IMHz) is applied to the drive electrode 31, and Vs = -1000V (DC) is applied to the screen electrode 33. The voltage is applied to each divided unit 1.2 of the control electrode 32 from the control electrode power source 38 via the divided drive circuit 186.
----Apply a negative DC voltage to the 12 groups of 12 in order.

In each divided unit, the control electrode voltage is controlled in the range of -1000V to -1500V so that the current flowing through the resistor R is 10 μA (terminal voltage IV of the resistor R) based on the output of the voltage detection circuit 181, and the voltage is It is stored in nonvolatile RAM as a set voltage for subsequent operations.

FIG. 28 (bl indicates the set voltage stored in the nonvolatile RAI').

This operation is performed at the time of shipment from the factory or during service mode, and in normal copying operations, switch 184 is turned on, switch 185 is turned off, and the misfortune 1? The write head 5 is controlled based on the set voltage stored in the AM. In the above description, only the control electrode voltage was controlled, but the drive electrode voltage or the 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.

The control system in FIG. 28(a) 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 method for suppressing fluctuations in the surface potential of an electrostatic image due to changes in temperature and humidity, deterioration of the sensitive material, deterioration of the writing head, etc. A surface potential measurement area 2B having a width of 20 fins is provided on one side of the photoreceptor belt 2 having a width of 20 fins.

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 340 mm so that it can print in a horizontal size of 4 mm, and the portion corresponding to the surface potential measurement area 2B generates an ion flow regardless of recorded information. The potential sensor 190 is connected to the control unit 40, and the control unit 40 has a configuration for controlling the power supply circuit 191 of the write head 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 that compares it with the first level E1 and a comparator 201 that compares it with the second level E2 (El>E2) o The comparators 200 and 201 are connected to the control unit 40 and The section 40 connects to a replacement indicator diode 204 or an operation stop indicator diode 205 via ports 202 and 203.
It is connected to the.

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>E, E>E2, 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, E<El, E
>EX, the light emitting diode 20 is turned on by outputting a deterioration signal from the boat 202 and turning on the transistor.
4 is lit 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 and E E2, 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 grounded (e.g. 0.3mm 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,
The configuration with drive electrode 310, control electrode 320, screen electrode 330, and insulator 340, 350, 360 corresponds to the configuration of FIG. , the part to the left of the boundary line A is a part that generates an ion flow toward the aforementioned counter electrode 210, and the part to the right is an image forming part that generates an ion flow toward the photoreceptor belt 2. Here, the control electrode 320 has a size of 2.5×2.5 cm, and is configured to emit a large amount of ions toward the counter electrode 210 by providing a large number of ion ejection 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 (current value is 1 μA), 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 (al shows a writing head 5 that forms an additional 1ff QH electrostatic charge image on the photoreceptor belt 2 supported by a feed roll 83, and heaters 220 are installed on both sides of the writing head 5. It is being

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 port 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 (bl indicates a contact type temperature sensor using a thermistor, and the heater 22
Bracket 25
The temperature sensor 23 (l) 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. This is a lead wire for use.

In the above configuration, when a signal of "1" is output from the control unit 40 to the transistor 223 via the port 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
．． The temperatures of the write head 5 and photoreceptor belt 2 are input from 240 via R/V converters 231 and 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 turned on and off appropriately based on the temperature of the write head 5 to control the temperature within a predetermined range.

In FIG. 33, the control unit 40 is replaced with a hardware circuit configuration, and when the temperature of the heater 220 is low, the resistance value of the temperature sensor 230 becomes large, and the output of the differential amplifier DA becomes large. Differential amplifier '5 (IAI) inputs a reference voltage to the negative terminal from a parallel circuit of a Zener diode ZD and a capacitor C. When the output becomes large, the group of guiodes turns on and turns on the transistor 223. When the temperature of the photoreceptor belt 2 rises 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 thereof is as described above. Equal to the reference voltage.When the output of the differential amplifier DAz 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 is turned off and the transistor 223 is turned off. Then, the operation of the heater 220 is stopped.

"LI Shoulder" ■1) Ota Figure 34 (a) shows a humidity sensor 255 attached to the screen electrode 33 of the writing head 5 shown in Figure 2 (al). , Figure 34 (b
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 IJ 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, including humidity detection circuit X, output side? It is composed of an In circuit Y and a high voltage oscillation circuit Z, and controls the voltage of the drive electrode 31 of the write head 5, for example. Now, when the humidity increases and the resistance value of the humidity sensor 255 decreases, the output of the differential amplifier DA:l, 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, transistor TR2, capacitor C1, C
2, C3, C4, inductance, etc. constitute a high frequency oscillation circuit.

For example, the writing head 5 shown in FIG. 2(a) is formed with a heating element pattern 261. This heating element pattern 261 is It is formed on the alumina CAl203) (7) insulation N260 provided on the electrode 33. As mentioned above, the gap between the writing head 5 and the photoreceptor belt 2 is 230 μm±5 μm.
In order to maintain a high degree of accuracy, the total thickness of the heat generating layer (resistance layer) 261 and the insulating layer 260 is desirably 200 μm or less. In addition to alumina and ceramics, the insulating layer 260 is suitably made of a glass glaze mainly composed of Sin, PbO, and the like. Insulating/resistive materials used in normal thick film processes, such as u-Pt-based materials, can be used. Furthermore, fever N
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 by the nodal 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.

``Mushi'' Hishito (Δ1 wind Figure 39 (al, (bl) is a device that forcibly blows dry air into the ion flow generation atmosphere, and a partial static elimination lamp 4 is placed opposite the photoreceptor belt 2 supported by the feed roller 83. and a writing head 5 are provided, an air duct 284 is positioned so as to surround the writing head 5, and the air duct 28
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 M4290 placed on both sides, and a desiccant 274 such as silica gel held by a case 291 between them.
is accommodated. 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) Improvement of ion ejection hole FIG. 41 shows a write head 5 with a drive electrode 31 and
It is composed of a control electrode 32 having an ion guide hole 32a and a screen electrode 33 having an ion emitting hole 33a, and the ion guide hole 32a and the ion emitting hole 33a have an oval shape elongated in the process direction (sub-scanning direction). have.

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.

〔Effect of the invention〕

As explained above, according to the electrophotographic copying machine equipped with the ion flow generation type electrostatic recording nozzle of the present invention, the length of the ion flow generation type electrostatic recording head is shortened according to the length of the additional information, and the drive circuit By reducing the number and making it a surface element, it is possible to reduce costs.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an electrophotographic copying machine equipped with an ion current generating type electrostatic recording head, FIGS. 2(a) and (b) are explanatory diagrams showing an ion current generating type electrostatic recording head, and FIG. Figure 4 is an explanatory diagram showing the partial static electricity removal lamp, Figure 4 is a block diagram showing the control system, Figure 5 is an explanatory diagram showing the console panel, and Figures 6 (al, (b), (C) are the FIG. 7 is an explanatory diagram showing recording, and FIG. 7 is an explanatory diagram showing another electrophotographic copying machine equipped with an ion flow generation type electrostatic recording head. From FIG. Figure 17 (a) and (b) from Figure 1) (al, (bl), (C) are explanatory diagrams showing the plate and supporting means for supporting the ion flow generation type electrostatic recording head, the power supply circuit, and the static FIGS. 18 and 19 are explanatory diagrams showing the connecting parts of the electrostatic recording head, and FIGS. From b), FIG. 22 is an explanatory diagram showing a means for moving a short ion flow generation type electrostatic recording head, and FIGS. 23(a) and (b) are a short ion flow generation type electrostatic recording head and a photoreceptor. Explanatory diagram showing the positional relationship with the belt, 2nd
Fig. 4 is a flowchart of control for recording additional information, Fig. 25 is a block diagram of a control circuit for erasing an electrostatic latent image based on exposure according to the recording area of additional information, and Fig. 26 is a flowchart of control 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, (
b) shows control for dividing and driving the ion flow generation type electrostatic recording head, (al is a block diagram, (b) is a non-volatile RA
An explanatory diagram showing the memory contents of M, from Fig. 29 to Fig. 31 (a
l, (bl, (C1 is an explanatory diagram of the detection means for detecting the surface potential of the photoreceptor belt, and FIGS. 32(a), (b), and 33 are heating and temperature of the ion flow generation type electrostatic recording head. Explanatory diagram showing the means of detection, Fig. 34 (al, (bl,
(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 FIGS. Fig. 37 (al, (from bl) Fig. 40 is an explanatory drawing showing a means for dehumidifying the additional information recording area, and Fig. 41 is an explanatory drawing showing an ion flow generation type electrostatic recording head. Explanation 1...--・--・--・Body 2--・--------・---Photoconductor 3--・-1-----・--Charge corotron 4 -
−−1・−・−・−Partial static elimination lamp 5 ・・・−・・−
・-Ion flow generation type electrostatic recording head 6.6A, 6B ・
・・−−−−1−−−・−Developer 7−・−・・−・−Transfer corotron 8−・−m−−−−−−−・−・・Detasure corotron 9 ・−−− −−−・・−・−・Precleaning corotron 10−−−−−−−−−−−−−−−−Cleaner 1) −・−−m−−・−・・−・−Platen Glass 12 --- Lamp 13 --- One --- Lens 14 ---
----------・----1 paper feed tray 15-・----
-1...-Duplex tray 16-
-----1・------1・Ejection tray 17.18.
20.22-:-----1・----Conveyance path 19・
−−−−−1−−−−−−Fuser 21−・−・−
・−・−・−・−Inverter 23−・−・−・−・−・
...-Sorter 31------------------Drive 7H, h32------------------Control electrode 32 a --- ---・--Ion guide hole 33---------------Screen electrode 33 a ----------Ion release hole 34.35 .36----------Insulator 37----------High frequency power supply 38-------1-- Control electrode Power supply 39---
--- Screen electrode power supply 40 --- Control section 41 --- Potential sensor 70 ---
・・・－・・・・・・・・・Console panel 71--
-----------Recording paper 71 a, 71 d
--------Additional information 71b, 71C・----
・−・−・−Copy image 71e ・・・・−・−・・−−
----Printer image 80---Plate 81------Side plate 82.
83.84.85----------------Feed roller 86---------Holder 8
7...-- Spring 90.--111--- Printed board 91.123.-
...−・−1−−−Card Esoji Connector 93−・
−・−・−−−−−1・Support member 94・−・−・−
11-----Support board 96-----111--Flexible printed circuit board 97--------
・-Electrode patterns 93 a, 98 b---
−−−−−−−−−−Pin 102 ・−・・−・−・
・−Connector housing 104 ・・・・・−・−
・−・−・−Lever 106 ・−−1−−−−−−・
− Pin 107 −−−−−−−・−・−Mounting plate 109
−−−−−−−−−−−−−Wire harness 1
21 −−−−−−−−−・・−・Pin 130 −−−
−−−−−−−−−−−1・Rail 131 −−−−−
−・−・・・Belt 132 ・−−−−−
-1-----...Drive roll 133...-----
---Idler roll 150 --- Recording paper size 151.152 --- Writing head recording area 168
・−・−・・・−−111・Light emitting diode 18 for static elimination
3 -...------------ Current detection sleeve 190 ------------ Potential sensor 210 ---- ---Ion flow detection opposing sensor 220 ---Heater 23
0.240 ・−・・・・−・−Temperature sensor 255
−−−−−−−−・−・・Humidity sensor 256−・−−
−−・・・One board 257 −・−・・−・−・
Electrode 258 ...-------... Angry humidity layer 259
-----------Protective layer 261 ---
−−−・−・−・−・−Resistance layer 272 −−−−・−・
−・−Sponge 274 −−−−−−−−−−−・−・
- Desiccant 282 ・−・−・−・・−・−・・Dehumidifying filter 283 −−−−−−・−1111111 Ventilation fan 290 −−−−−・・−・−・・・・・Sponge 291 −−−−−−−−・−・・−・Case 3
10 --------------- Drive electrode 320 --------- Control electric scraper 330
--------1・-1------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 (a) (b) Figure 1I (b)
(c) No. 13'A Fig. 14 (a)
(b) Figure 15 (a)
(b) Figure 19 Figure 20 tσ Figure 2I Figure 23 tσ (b) 15/A Figure 26 Figure 27 Figure 31 tσ Figure 32 (a) (b) 250 L/~ Figure 33Figure 34(b)
(c) Figure 35 r Figure 36 Figure 38 Figure 37 (b) 4 Figure 39 tσ (b)

Claims (9)

[Claims] (1) an exposure means for forming a first electrostatic latent image by irradiating a pre-charged photoconductor with reflected light from the original; a static eliminating means for erasing the first electrostatic latent image; ion flow generation means for generating a second electrostatic latent image on the photoreceptor by generating an ion flow; and a developing means for developing the first and second electrostatic latent images to form a toner image. , an ion flow generation type electrostatic recording head having a transfer means for transferring the toner image onto a recording medium, a fixing means for fixing the transferred image on the recording medium, and a control means for controlling each of the means. An electrophotographic copying machine, comprising an ion flow generation type electrostatic recording head, characterized in that the ion flow generation means is configured to have a length smaller than the width of the image forming area of the photoreceptor. Electrophotocopy machine. (2) The ion flow generation type electrostatic recording head according to claim 1, wherein the control means moves the ion flow generation means in the width direction of the image forming area of the photoreceptor to perform a printer function. An electronic photocopy machine equipped with (3) The control means controls the transfer means to transfer the toner image based on the first and second electrostatic latent images onto the recording medium through a single transfer process. An electrophotographic copying machine equipped with an ion flow generating electrostatic recording head. (4) The ion flow generation type electrostatic recording according to claim 1, wherein the control means switches the bias voltage of the developing means according to the latent image potentials of the first and second electrostatic latent images. An electrophotographic copier with a head. (5) The developing means comprises first and second developing machines having bias voltages corresponding to the latent image potentials of the first and second electrostatic latent images. An electrophotographic copying machine equipped with an ion flow generating electrostatic recording head. (6) The ion flow generating static image pickup device according to claim 1, wherein the photoreceptor is constituted by a flexible endless belt, and is supported by a plate-like member from the back side at the position of the ion flow generation means. An electrophotographic copying machine equipped with an electrographic head. (7) The ion flow generation type according to claim 1, wherein the control means moves the ion flow generation means in the width direction of the image forming area of the photoreceptor to form additional information at a predetermined position. An electrophotographic copying machine equipped with an electrostatic recording head. (8) The ion flow according to claim 1, wherein the control means causes the static eliminator to erase the first electrostatic latent image in an area corresponding to the formation area of the second electrostatic latent image. An electrophotographic copying machine equipped with a generation type electrostatic recording head. (9) The ion flow generation type electrostatic recording head according to claim 1, wherein the control means causes the ion flow generation means to generate positive and negative ions to neutralize the charge on the photoreceptor. Equipped with an electronic photocopy machine.