JPS6242174A - Electrophotographic device - Google Patents

Abstract

PURPOSE:To provide an editing function by providing a means which inputs position information on an original in a scanning direction, a means which inputs position information on a photosensitive body in the scanning direction, and an electrostatic charging controller. CONSTITUTION:A blank mode is for taking a copy while specific lines of the original are deleted, and a range indicated by the 1st and the 2nd markers of a line specifying device is a deletion range in blank mode. Sensors fitted to the markers detect the scale of a scale belt and counted values n2 and n3 are obtained by a counter 121. Those are inputted to the 2nd computer 123 and then the 1st computer 120 sends out an instruction so that an electrostatic charge erasure device is put in operation while the counter 128 of a photosensi tive body position detecting device counts from n2 to n3. When the counter 128 of the photosensitive body detecting device reaches n2, the electrostatic charge erasure device operates to begin to remove charges on the surface of the photosensitive body and when the counter 128 reaches n3, the electrostatic charge erasure device stops.

Description

[Detailed description of the invention] The present invention relates to an electrophotographic apparatus equipped with an editing function.

Conventionally, the main purpose of electrophotographic apparatuses has been to faithfully reproduce the information contained in the original image, and great efforts have been made to obtain a reproduction that is closer to the original image. As a result, it is now possible to obtain reproductions of very good quality, and especially in black-and-white copying machines, it has become possible to obtain reproductions with almost the same temperature as the original image.

On the other hand, in practice, there are many cases where it is desired to erase unnecessary information in the original image or insert other information into the erased portion. For this reason, in the past, the original drawing was once copied, cut and pasted to create a new original drawing, and this was further copied to obtain the necessary information. Shitakatsu℃,
In response to today's demands on copying machines, it is expected that they will not only be able to reproduce original paintings faithfully, but also be equipped with such editing functions.

Generally, when editing a manuscript using a machine, characters are encoded using a typewriter, decomposed into bit patterns using a scanner, and then edited using a computer. -Y plotter etc. was used to input the data and reproduce the drawing method. However, this method requires a typewriter and a high-speed scanner, and also requires an electronic computer for processing, which has drawbacks such as the time it takes to create a program.

Editing of information according to the present invention is performed by several devices incorporated into the electrophotographic device.

The electrophotographic apparatus according to the present invention is capable of editing in blank mode, two-color mode, skip mode, blank insert mode, and the like.

Blank mode is a format that erases specific lines from the original and leaves that part blank. Used to delete unnecessary or confidential parts of the original.

Two-color mode is a style in which a specific line of the original is expressed in a different color from other lines. Used to highlight specific lines in the original.

Skip mode is to skip specific lines of the original.
'C1 This is a format in which the previous line and the following line are continued without any space between them. Remove unnecessary parts without changing the original appearance.
Used when deleting IP confidential parts.

The blank insert mode is a format in which the original specific line spacing is widened and a Vc blank space is provided there. It is used to add necessary information and to make the copy easier to read.

According to the electrophotographic apparatus of the present invention, in addition to normal copying, it is also possible to edit image information, so it is possible to create copies that are faithful to the original as well as copies that are different from the original. Helps streamline office work.

Accordingly, it is an object of the present invention to provide an improved quadruple photographic apparatus.

A further object of the present invention is to provide an electrophotographic device with an &i collection function.

The present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram schematically showing an example of an electrophotographic apparatus according to the present invention. Inside 1 of the main body 1 of the apparatus, the photosensitive drum 2 and transfer drum 5 having the same diameter are rotatable &'c contact 1-
"I: The photoreceptor drum 2 rotates counterclockwise, and the transfer drum 6 rotates clockwise. The photoreceptor drum 20 is charged at a temperature of °C along the rotational direction l/c. A corona discharger 4, a charge erasing device 5, a first developing device 6, a second incubator 7, a separating corona discharger 8, a cleaning device 9, a charge eliminating corona discharger 1o, and a quenching lamp 11 are arranged, respectively. It's ℃.

An original platen 12 having a transparent contact glass is arranged on the upper part of the apparatus main body 1, and an original @13 is placed on it. Below the document table 12, there are an illumination lamp 14, a first reflection mirror 15, a second reflection mirror 16, an in-mirror lens 17, a mirror 6 reflection mirror 18, and a color filter unit 19, each of which has its own predetermined settings. It has an optical positional relationship of ℃ and is located at ℃. The illumination rung 14 and the first reflection mirror 15 move together from the position shown by the solid line to the position shown by the dashed-dotted line to scan the document 15 on the document table 12. At this time, the second reflecting mirror 16 also moves in the same direction at half the speed of the fang 1 reflecting mirror 150. The filter unit 19 includes a color separation filter and an ND filter, and in the case of a normal black and white image, an ND filter is used.

When the photosensitive drum 2 rotates counterclockwise.

Its surface is uniformly charged by a charging corona discharger 4Vc. When the light image of the original 16 is irradiated onto the surface by the optical system, C charges are scattered according to the light image, and a Vc electrostatic potential is formed there. This is to remove the electric charge from a predetermined portion of the photoreceptor surface to prevent a latent image from being formed on that portion, and is not used in normal copy mode.

The static* latent urine on the surface of the photoreceptor is removed by the developing device (rJJ
Visualized. The first developing device 6 stores developer of any color other than black.5. Used when in two-color mode. 3-2 The developing device 7 contains a black developer, and normally only this developing device is used. The development is
This is done by electrostatically adsorbing colored fine particles called toner in the developer to the electrostatic a-image. After development, the surface of the photoreceptor is exposed to discharge from the separating corona discharger 8, and the electric charge on the toner is removed.

The transfer drum 6 is provided with a transfer paper holding device 20, and the transfer paper 23 fed by the paper feed roller 22 is held on the peripheral surface of the transfer drum 6 by synchronization between this and registration rollers 21. The rotations of the photoreceptor drum 2 and the transfer drum 3 are synchronized, and the leading edge of the image on the photoreceptor drum and the leading edge of the transfer paper on the transfer drum coincide and advance by degrees Celsius. toner image is transferred onto the transfer paper. Subsequently, the ℃ transfer paper is separated by the separation claw 24.
It is separated from the C transfer drum 6, passes through the fixing device 25,
It is discharged onto the tray 26. On the other hand, the photosensitive drum 2.

Toner remaining on the surface is removed by a cleaning device 9, and charge remaining on the surface and inside the vch is removed by a static eliminating corona discharger 10 and a quenching lamp 11.

In normal copy mode, both the photoreceptor drum and the transfer drum complete the copy cycle in one rotation, but for example, when copying in two-color mode, the photoreceptor drum and transfer drum complete the copy cycle in two rotations. Finish the copy cycle.

The copying machine according to the invention incorporates special devices for carrying out several editing modes: 1. '・ru. Next, I will explain how to use these equipment.
1 and 2, the line designation device which is the first position information input means will be explained. This device 30 is a device for specifying lines or ranges to be changed in a manuscript for editing.
A guide rod 31 is fixed to the main body of the copying machine on the side surface of the contact glass 12. , the first marker 62 and the second marker 66 are prevented from rotating and are slidably attached, and the reference marker 64 is aligned with the tip of the contact glass, that is, the scanning start position, and becomes non-slidable. The temperature sensor 65 is attached to each marker and extends to the horizontal direction.
．． 66°67 is installed. Each sensor has a pitch n passed between two rollers 38,690.
If the sensor is a photocoupler, the scale belt 4U is a transparent film, and the photocoupler's light emitting part and light receiving part use this film to The scale belt 40 can be made of magnetic tape, and the sensor in this case is a magnetic head. can be rotated.

The first marker 62 and the j-2 marker 66 are manually positioned in degrees Celsius, and the line or range to be changed in the document is between them. The scale belt 40vc is provided with a reference point 42, and when the belt 40 is rotated in the direction of the arrow by the motor 41, the reference sensor 67 first detects the reference point 42, and a counter (not shown) connected to this sensor clears. and begins counting the number of tick marks that pass below it. Reference point 42 is 71 sensor '56
The count number when the reference point 42 passes under the second sensor 65 is stored in the computer, and the count number when the reference point 42 passes under the second sensor 65 is similarly stored in the conbeater. This stores the distance of each marker from the end of the contact gas, that is, from the scanning start position, and based on this, some specific processing is performed.

When specifying lines using markers, instead of specifying lines to which changes should be made, you can also specify lines that should not be changed.Also, if there are lines that should or should not be changed intermittently, you can use many markers to specify lines that should not be changed. ℃ Specify this at once?
You can also store it in your computer and set it to ℃.

In the case of a type in which the optical scanning system is stationary for about 22 steps and the document table is moved, the 1'i7 scale is installed directly on the side of the contact glass, and the document table is moved once, and each marker Distance M from the scanning start position? It is best to detect this and store it in the combiner.

At the arrow, refer to Figures 3 and 6. ``''C Charge Elimination Liu I'' (I will explain it briefly. This is a charge control device that partially charges the surface of the photoreceptor. When charging the necessary part, this is a device to prevent the formation of the 9z type 7 in that part. There are cases where the charge on the charged photoreceptor surface is partially erased.In the former case, the input to the charging corona discharger is opened and closed as appropriate.
An opening/closing plate is provided on the front of the corona discharger, and this is opened and closed as appropriate to perform partial charging. In the latter case, a white mask means is provided on the manuscript table, and this is inserted into unnecessary parts of the manuscript to be deleted, and the C and M lights are emitted to dissipate the charge in these parts.
Alternatively, a slit type white exposure means is provided separately from the normal exposure means, and charges are erased by operating this as appropriate. The charge erasing device 5 shown in Figure 6 is this last example. The deleted portion of the manuscript may be extremely narrow, so
Exposure must be a narrow slit exposure with a width of 0.5 to 6 mm that operates at high speed.

In Figures 3 and 6, reference numeral 51 designates a lamp housing in which a rung 56 with a reflector 52 is accommodated. The lamp housing 51 has an elongated shape along the width direction of the photoreceptor drum, which is slightly longer than this width.The lower part of the lamp housing 51 is constricted to form a narrower width portion 51a.
is continuous ℃. A biconvex cylindrical lens 54 is fitted in the boundary between the upper part of the lamp and the lower part of the lamp. In the center of the lower body, there is a horizontal su! J-
A longitudinal slot (51c) connecting the center of the lens 51b, the rung 56, and the lens 54 is provided.

Width: 0.5 to 5 mm O) Q-direction slit fX: Partition plates 51d% and 51e are provided above and below the horizontal slit 51b to make the width of the slit fX: 0.5 to 5 mm wide. A shielding plate 55 having slits of the same Ig as the vertical slits provided in both partition plates is inserted between the slits in the polar direction. An armature 56 is mounted on one side of the shielding plate 55, and a tension coil spring 57 is mounted on the other side. As a result, the shielding plate 55 is constantly pulled in the direction of the arrow, and the slits of the shielding plate 55 are aligned with the partition plates 51d,
It is arranged so that it does not coincide with the vertical slit provided in 51e. Electromagnet 5 facing armature 56
8 is provided, and when this stone is energized, the armature 56 is attracted to it, and the slit in the shielding plate 55 matches the slits in both the partition plates 51d and 51e. Therefore, while the electromagnet is energized at 0.degree. C., slitting light is performed using white light to erase the charge on the surface of the photoreceptor.

Next, referring to Figures 3-4 to 7, the 61JvC scanning system moving position detection device will be explained. The scanning system movement position detection device is a device for editing such as skip mode and blank insert mode. In the skip mode, it is necessary to skip a specific line of the document and continue the next line with the previous line. Therefore, in the second image forming process, It must precede the synchronization position and be synchronized by °C.

In addition, in the case of blank insert mode, it is necessary to provide blanks between specific lines of the document, so:] - In the second preparation process, the exposure scanning system is moved slower than the normal synchronous position of the photoreceptor drum. must be synchronized. In this way, this device is used to delay or advance the synchronization start point for the scanning system α photosensitive drums.

As shown in Figures 4 and 5, Exposure Tanshi's rung unit 61 is similar to a normal copying machine, and the entire unit is supported by a guide rod 62 and slides at 10 degrees Celsius, with a lamp 66 inside.
, reflectors 64, 65, and reflecting mirror 66 are arranged in a predetermined optical positional relationship. The difference from the conventional Km is three sensors 67, 68, 69 provided in the lamp unit 61 and a scale plate 70 provided in parallel to the guide rod 62. As shown in Figure 6, the scale plate 70 has a large number of narrow notches with a pitch n on one side of a strip plate, and the distance between each sensor 67, 68, 69 is Q+-, and n is Thicker than the width of the sensor. By arranging the sensor in this manner, it is possible to know the movement key of the lamp unit and its position, and also to know the direction of movement. f That is, when the lamp unit moves in the direction of the arrow, the order in which the three sensors detect the scale is sensor 68. 67, 69, and when the lamp unit moves in the direction of arrow B, the order is sensors 68°, 69.67. The direction of movement of the lamp unit in degrees Celsius can be determined by the order of the input signals received from each sensor, and the amount of movement y2 in degrees Celsius can be determined by combining the input signals. The moving hand is synchronized with other devices and is counted in degrees Celsius using the home position of the second unit, that is, the scanning start position, as its starting point. Therefore, even if the lamp unit stops midway, its position can be determined by the number of counts.

Note that the scale plate 70 may be a magnetic tape, a magnetic rod, or the like.

The rung unit must be synchronized with the photoreceptor drum or, in the case of this device, must be able to be driven independently of the Vc photoreceptor drum.

Therefore, as shown in Figures 3 and 7, the rung unit 61
A shaft 71a of the motor 71 and a crankshaft 2.73 V of the photosensitive drum 2 are provided for driving the shaft 71a of the motor 71 and the photosensitive drum 2, respectively. Motor shaft 71aV
C is named after a tin rocket wheel 74 fixed to it, and a chain 76 is passed between it and a tin rocket wheel 75 fixed to the drum shaft 2a. A pulley 77 is fixed to the drum shaft 2a Vc, and a wire 80 is stretched between this and pulleys 78 and 79 provided at both ends of the contact glass 120. The rung unit 61 is also secured to a portion of the wire between pulleys 78 and 79.

The shirt h2aK of the photoreceptor drum 2 is inner layered with another tin rocket wheel (not shown), which receives power and rotates the photoreceptor drum 2 in the clockwise direction Vc. At the same time, the Suffin wheel 77 also rotates, and the rung unit 61 also moves in the direction of arrow A in synchronization with the 18-light drum.At this time, the clutch 72 provided on the shaft 7ta of the motor 71 is disconnected. , the power of the shaft 2a of the photoreceptor drum is not transmitted to the motor 71.When the lamp unit 61 or its movement reaches the R point, the clutch 72 transmits the power of the motor 71. The signal is transmitted to the wheel 74, and the lamp unit 61 moves in the direction of arrow B. This time, motor 7
The clutch 76 is disengaged so that the power from the photoreceptor drum 2 is not transmitted to the photoreceptor drum 2. Therefore, by turning off the crankshaft 6, the lamp unit 61 can be freely stopped at any position, and by operating the motor 71 and the clanchia 2, it can be returned to its starting position ffl& at any time.

If the exposure scanning system is not the above-mentioned one with a moving lamp unit, but the rung unit is stationary and the document table is moved, the scale plate is installed directly on the document table, and each sensor is Similarly, it is preferable to provide the lamp unit or another immovable member at a position where the scale on the document table can be covered in degrees Celsius when the document table is in operation, that is, at the scanning start position. In addition, in the apparatus shown in FIG.
The contact glass 120 is provided with a pulley 7 on both ends.
Attached to the wire between 8.79.

Next, referring to FIG. 8, the photoreceptor position detection device 81, which is a position information input means at 0.2°C, will be described.

This device is necessary for removing the charge on the photoreceptor area for the document area designated by the line designation device and for synchronizing the photoreceptor with the movement of the scanning system.

The axis 2aVc of the photoreceptor drum 2 is fixed to a scale disc 82 having a scale with a pitch n, and when the photoreceptor drum 2 is normally at a predetermined rotation start position A, that is, at a scanning start position, the scale circle is fixed. The reference point 86 of the plate 82 is located on a sensor 84 provided on the copying body and is connected to a voltage of 5Vc. Therefore, the ℃ charge eraser is controlled by the sensor 84 and the contents of the counter connected thereto, which are counted in advance by the line specifying device, and the mechanical setting of the ℃ charge eraser $-i! If the contents of the above counter and the sequence timing are matched with the data stored in the °C memory, then the charge on the specified part of the photoreceptor can be reduced. You can do things like delete it.

Similarly, the number of runts at processing positions in two-color mode, skinobu mode, etc. detected by the row designation device, and the count number of the counter connected to the running and thread transfer r-position detection device are also displayed. , so that the sequence timing matches the counter connected to the sensor 84 (by converting the magnification and storing it in memory, the running blue optical system is delayed from the normal synchronization position of the photoreceptor by comparing the contents of the counter). You can also synchronize from an advanced point.

If the photoconductor is plate-shaped, the scale plate is not a disk, but
Of course, it will be a straight plate.

Next is the spear? The temperature of the developing device 91rt will be explained with reference to the figure. The developing device according to the present invention is equipped with two developing devices for editing in two-color mode. Even with two developing devices, three-color development can be performed by mixing colors.

Furthermore, if two or more color fk devices are provided, it is also possible to perform color fk of two or more colors. This invention includes such modifications.

゛Two-color development using two developing devices! ? When this is done, it is necessary to prevent other developing equipment from operating while the color is being developed. Otherwise, the two present 1
When the x device works, the colors of the image are mixed and the color of the image is mixed. The magnet inside the sleeve is an electromagnet.

It is L7 in 5 to cut off the electricity to the oscillator when it is not in operation.

]・In Figure 9, the developing device 91 is the toner replenishing device in the developing device 9? 5. Impeller 94, conveyance roller -9
5. A developing roller 96 and a scraping plate 97 are arranged at predetermined positions, respectively. Toner supply device 6
Reference numeral 96 is a device for appropriately replenishing new toner into the peep 1 container 9 yen. thrown into a container. The impeller 94 is
The developer 100 in the developing container 92 is stirred and fluidized at 1:y! Erasing 10: Charge the toner and the magnetic carrier to a predetermined polarity and Vc life. The conveyance roller 95 is composed of a non-magnetic sleeve 101 that rotates in a counterclockwise direction, and first and second permanent magnets 102 and 106 that are statically housed inside the sleeve 101, and the developer 1.
It has the role of adsorbing to the surface of the non-magnetic sleeve 101 and conveying it upward. The current roller 96 is equipped with a conveyor roller 95vc, a non-magnetic sleeve 104 that rotates counterclockwise, and electromagnets 105, 106, and 107 that are statically housed inside the sleeve 104. The electromagnets 105, 106, 107 are each connected to the power supply 111 via the switch 108, 109, 11[1. In operation, the electromagnets 105, 106, 107 are connected to the power supply 111 via the switch 108, 109, 11 [1].
110 degrees Celsius are closed, and thereby each electromagnet is excited, and the developer on the conveyance roller 95 is transferred onto the developer roller 96.

The transferred developer is conveyed upward on the developing roller by the non-magnetic sleeve IQ 40 rotations, and on the way, the thickness of the developer layer is controlled by a doctor 112. The electrostatic latent image on the drum is made visible. The developer on the roller is
It is removed from the developing roller by the scraping plate 97vc and collected into the developing container 9z. Development is carried out by the toner in the developer being attracted to the electrostatic latent image, so the recovered developer has a lower toner concentration and an amount of new toner equivalent to the amount consumed by development. is replenished into the developing container from the toner replenishing device 96. During non-development, the switch connected to each electromagnet is switched to switch 108.
．． 109, IIO are opened in the order of ℃, stop new conveyance of developer, and the remaining ℃ developer? , and scrape it off using a scraping plate 97.

Next, the 1lill i+MI system 5 when performing the edit mode will be explained with reference to Figure 3-1a. When the line specifying device is set with the marker 5 of the machine and the sensor detects this, this is input to the counter 121 and the position from the reference is counted. The output of the counter 121 is input/output device 122
"," is input to the i-2 computer 123.

On the other hand, the output from each sensor of the scanning position detection device is
A gate circuit 124Vc is inputted, thereby detecting the combination of pulses and the moving direction of the scanning system, and then an anog down counter 125 counts the position of the scanner from the reference. a.

The output of the down counter 125 is input/output! fJ-i
22°C second computer 123 VC large input. The second con-heater works as a total of n units, and the counter 1
Based on the data sent from 21 and up/down counter 125, the timing for operating the charge erasing device and the scanning system is calculated, and the results are stored in RAM 126. The ROM 127 stores programs for performing this calculation. On the other hand, the output from the sensor of the photoconductor detection device is inputted to the counter 128Vc, which detects the position of the photoconductor in degrees Celsius.
9 is sent to the -C first computer 11301c. Fang 1 computer 160, works as a controller, R
A sequence order is assembled from the data stored in the AM 126 and the editing mode specified by the operator, and the counter 128 executes a sequence through the input/output device 151 based on the count results. ROM 13
2. Programs for performing sequences are stored.

The actual operation of each editing mode will be briefly explained with reference to FIG. 10. For convenience of explanation, the output from the scale belt and the scale plate in the line specifying device and the omnivorous moving position detection device is assumed to be 6 tatami of the length in the travel strain direction of the contact glass on which the original is placed, and the photosensitive The scale of the scale disc in the body detection device is
Equal division and 1-1 count of each scale nlJ, nl, n2
, n3, n4, n5. It is assumed that the length of the contact crow in the scanning direction is equal to the circumferential length of the photosensitive drum. The document to be used is the thickness of the entire surface of the contact glass, A, B, C, as shown in Figure 11.
It has 5 lines D and E, and counts are made for each song on each line. Further, the angle between one position of the FF eraser and the exposure position on the photosensitive drum is one scale.

First, let me explain about the blank mode.

The blank mode is a bR type that deletes the rows of the original and copies them.The rows to be deleted are shown in Figure 11 of the original.
Line. First, specify the °C mode using the control panel. The mode state is determined because the calculation method of the second computer 12B for the output of the line specifying device differs depending on each mode. In this blank mode, the temperature is within the range designated by the first and second markers of the line designation device or the range to be deleted. For this reason, as shown in FIG. Specify line deletion. The sensor attached to the first marker and the second marker or the scale of the scale belt is detected, and the color/color 12 is detected.
Count by 1 in2. n6&%, this is input to the second computer 123K. As a result, the counter 128 or n2 to n6 of the photoreceptor position detection device
>1 to activate the charge erasing device while counting.
A command is issued from the computer 16 [J. In this mode, the scanner is always at a fixed starting position, i.e. the position of callan hd5no, and starts from this position. The photoreceptor drum starts rotating and the rotation speed is Δ71/
Each device operates according to instructions from the computer 16υ. The surface of the photoreceptor is charged to a certain level by the electric discharger.

When the counter 128 of the photoreceptor detection device counts n2&, the charge erasing device operates and begins to remove the charge on the photoreceptor surface ml. This continues until counter 128 increments count n6 by four. Is counter 128 counter/t n3? :
Once counted, the charge erasing device stops. As a result, on the surface of the photoreceptor, there is no V C charge corresponding to t'b corresponding to C row of the original. When the surface of the photoreceptor is treated with a photoreceptor, a latent image of 15 minutes in row C is formed.

When this image 1-z is transferred, a copy without the C line as shown in FIG. 1112 (2) is created.

Next, we will discuss the two-color mode. Is the two-color mode specific to certain lines of the manuscript? This is a style in which 'vi' is given in a different color from other lines. This one time requires two copying cycles, and in each cycle each color is
J is done. Example of two-color mode and L [, original A, B
, D, and E lines are currently in black, and C line is currently in red.
In this case, liT will be explained. First, specify the two-color mode using the control panel, Figure 3.16 (1)
As shown in Figure 5, the first marker 62 %3 between row B and row C
-2 Set 66 markers between rows C and D. The marker finger π in this mode requires that the charge erase in the first resetting cycle be performed in the marker designated area, and that the charge and white erase in the second copy cycle be performed in the area outside the marker designated area. , the program is set up like that. In the first copying cycle, the area excluding the 0th line is printed in black in the same process as in the blank mode, and this is once transferred to transfer paper. The transfer paper enters the second copying cycle while being held on the transfer drum, and after the photoconductor is charged, the charges on the photoconductor other than the 0th row are erased, and only the 0th row a
h is formed. This was developed into a red color by another developing device π℃, and this was already black. When transferred to the transferred transfer I, a copy is obtained in which rows A, B, D, and E are black and row 0 is red. This order may be reversed and the data may be viewed and transferred to the CC line first.

Two-color mode is used to make a particular row stand out by making it a different color than the other rows.

In order to make the rows of % and % sticks stand out, it is sufficient that they are the same color and the rows are particularly colored. In order to do this, when forming a 0-line latent image in the second copying cycle, the photoreceptor charging level must be set higher than that in the first copying cycle.
It is sufficient to form a uraha with a high potential. If you do this,
Since the toner adheres to the Eisai, some rows will be developed darker than others, even if they are the same color.

The two-color mode can be made into a multi-color mode with the use of the necessary grograms and multiple development devices.

Next, the skip mode will be explained for the case where the C line is digitized. Skip mode is a mode that allows you to skip a certain line and fill in the previous and next lines. Copy up to the line you want to kill, then copy after that line? Since it will be photocopied, please make 8 copies of 2 copies. Specify the mode and set Vc at both ends of the 20th line of markers as shown in FIG. 214 (1) to have the computer select the skip mode program. In the first copying, the part below line C is charged and erased.
Latent images in rows A and B are formed, developed, and transferred.

During the second copying, the optical scanning system leads the photoconductor drum by a count and synchronizes with the photoreceptor drum, and the parts in rows A and B are removed.As a result, A , B
The photoreceptor portion corresponding to the row has 'CB, 0' depending on the scanning system.
The row part is projected, but since the power is turned off, no image is formed on this part, and the parts corresponding to the C and D rows are D and E.
A row is formed.

this? When developed and transferred to the transfer paper on which the previous lines KA and B were transferred, a copy of lines A, B, D, and E with 0 lines skipped is obtained as shown in Figure 14 (2).

Exposure optical system f? - The number of counts to be preceded by the photoreceptor drum is in this case n3-n2=nl from the range specified by the marker in degrees Celsius. When the 0th row and the D row are scanned, the second marker 66 is set between the D row and the E row, so that n4-n2=n2. The travel-based movement displacement detection device according to the present invention is capable of moving the lamp unit or the scanning system of the document table by a predetermined number of counts. I wanted to,
The first KD and E rows may be developed and transferred, and then the A and B rows may be developed and transferred. Once the advance count is 1, the scanning system may be advanced by the count 1 and synchronization with the photosensitive drum may be started. In general, if you start synchronization when the difference between the count number of the set meal position detection device and the count number of the photoreceptor position detection device is equal to the predetermined number of preceding counts, you can enter skip mode at will. ? Obtainable. Also, if the running system is operated from a mid-way position, it may cause blurring in the image, so use the device shown in Figure 7 and place the constant strain system 4iT away from the synchronization point. same le”
It is preferable to move the photosensitive drum 4 at a slightly slower speed than the synchronous speed f until the synchronous point, and then mechanically join the photosensitive drum 9 when the synchronous point is reached.

Next, the blank insert mode will be explained. Is this mode between specific lines? It is a widely used style of copying. Specify the range to be spaced by markers. 3. As shown in Figure 15 (1), if the first marker 62 is set between the B row and the 0 row, and the 2nd marker 56 is set between the 0 row and the D row, the area below the B row is marked with the marker. This is done by a command to open a specified range and then copy the next VcC line and below, or by specifying a mode. First, in the same way as in the skip mode, in the first copying, the portion of the C photoconductor below the count n2 is charged and erased.
A J image is formed, and an I image is transferred. In the second copying, the charges on the photoreceptor up to count n3 are erased. Further, the exposure scanning system is delayed by a number of counts from the photoreceptor drum and is synchronized by degrees Celsius. That is, when the photoreceptor detection device counts nl, the scanning system starts the 1olJ period. As a result, each row of seven rows is exposed to the lower degree Celsius. Since the portion of the photoreceptor up to n6 is de-energized, no latent image is formed, and the a-marks of rows C, D, and E are formed in the portion below n6, one row at a time. Develop this and
When the previous lines KA and B are transferred by the π-transfer method, a copy with one line gap between the line and the 0 line is obtained as shown in FIG. 15 (2).

The difference between this mode and the skip mode is that this mode synchronizes the exposure scanning system with the photoreceptor by a predetermined number of counts, while the skip mode is the opposite. The culprit is that it is synchronized before the photoreceptor. The program is different, but the process is the same: find the difference between the count number of the running system position detection equipment and the count number of the window light detection head equipment. In this mode, C, D, and E rows are developed and transferred first, and then A
, B rows can be developed and transferred.

In the above example, below line C? BC down one line at a time
A similar effect can be achieved by leaving a wide space in between or, conversely, by placing three or more lines on top.

In this case, the same processing as in skip mode is performed.

That is, in the first copy, lines c, o, and E are transferred to the normal position υ, and in the second copy, the portion of the photoreceptor with a count number n1 or less is transferred to is synchronized by a count of 1 before the photoreceptor. In this way, one gap of the B row is formed at the position of the A row, and a wide area between the B row and the 0 row can be made white.

Each of the editing modes described above is just one example using the device of the present invention, and many more editing modes can be created using the device of the present invention.

For example, you can combine blank mode and two-color mode,
You can also combine the skip mode and blank insert mode, or even the Hatebe ℃ mode.

In addition, in the above embodiment, C was deleted row by row, but instead of using a single long tube as the light source of the charge erasing device, small light emitting collectors arranged in rows were used. By providing shielding plates on both sides, it is possible to delete a specific portion of one line.

Furthermore, various modifications can be made within the spirit of the invention and are included within the scope of the claims of the invention.

[Brief explanation of drawings]

]・Figure 1 shows an example of an electronic copying device according to the present invention.
The schematic diagram, Figure 3-2, shows the line tag foot device used in the device of this invention. Fig. 6 is a schematic diagram showing a charge erasing device used in the device vc of this invention, and Figs. Figure 7 is a schematic diagram showing an optical system movement control device used in the apparatus of the present invention, and Figure 8 is a schematic diagram showing a photoreceptor position detection device used in the apparatus of the present invention. , (Figure -9 is a schematic diagram showing the developing device j used in this invention, Figure 10 is a block diagram showing a control system for performing the editing mode in this invention, and Figures 3 and 11 are diagrams showing each editing mode. Figure 12 is a diagram to explain the blank mode, Figure 16 is a diagram to explain the two-color mode, and Figure 14 is the skip mode. 3115 is a diagram for explaining the blank insert mode. 5...@electronic eraser, 60... line designator, 32,
33... Marker, 60... Set meal type moving position detection device, 81... Photoconductor position detection device foil 2. Muscle 3. Cause'RikichiiObiri'Rikichii? Hiratsu(() (Z)false I((I) (Z)ffi
A4 J0 (A) (2) Line 45
figure

Claims (1)

[Scope of Claims] An electrophotographic apparatus that forms a document image as an electrostatic latent image on a moving photoreceptor via an exposure scanning system, and forms a visible image on transfer paper based on this electrostatic latent image, a first input means for inputting positional information on the document in the scanning direction; a second inputting means for inputting positional information on the photoreceptor in the scanning direction; the first inputting means and the second inputting means a charging control device for forming or erasing an electrostatic latent image in a predetermined area of the document indicated by the first input means among the electrostatic latent images formed on the photoreceptor, based on position information from the photoreceptor; An electrophotographic device with