JPS634275A - Editing and copying device of original image projection and transfer type - Google Patents

Abstract

PURPOSE:To conform the position of an edited visible image to a sheet easily in a transferring section by making synchronous positioning of the starting end of the transferring section and the tip of a sheet basing on the count value of timing pulses. CONSTITUTION:Timing pulses are generated by a rotary slit plate and a photo- sensor connected to a main motor 47. The timing pulses are utilized as belt synchronizing pulses while a photosensitive body belt 15 is being driven. When the belt 15 is driven, a counter starts counting of timing pulses and the count value indicates the position of advance of the starting end of an image recording area on the belt 15 making the exposure position 13 a reference point. When transferring, paper feed start timing of a resist roller 21 and on/off timing of a transfer separation charger 23 are set referring to the count value. Thereby, positioning of an edited visible image to the sheet can be made easily and accurately in a transferring section.

Description

Detailed Description of the Invention ■Technical Field The present invention projects an image of a document onto the surface of a photoreceptor through an optical system without converting it into an electrical signal to form an electrostatic latent image on the surface. In particular, regarding an original image projection/transfer type copying device that develops the latent image and transfers it to a sheet such as recording paper,
The present invention relates to an editing copying apparatus for obtaining an edited copy by extracting and/or erasing an image of one or more areas of one or more original documents.

■Prior art A typical conventional copying machine includes an image reading device that scans an image and obtains an electrical signal (image information) corresponding to the image light;
It is equipped with a page memory, a read/write control device, and a printer that prints out memory reading information, and when writing image information to the page memory and/or reading out image information from the page memory, the image information part is read out from the page memory. A copy of one or more pages of a manuscript with one or more edits is obtained by performing deletion, extraction, or replacement.

In a copying machine that performs editing through image information processing in this manner, sophisticated and complicated editing can be performed relatively easily.

However, in the above-mentioned original image projection/transfer type editing/copying apparatus, the original image is projected onto the surface of the photoreceptor using an optical system without converting it into an electrical signal, so editing must be done mechanically. Erasing is performed by partial erase static electricity removal on the surface of the photoreceptor before or after exposure, and the image shift in the scanning direction of the original (X direction: corresponding to the direction in which the recording paper is sent for transfer) is caused by the transfer to the transfer section. This is done by adjusting the feeding timing of the recording paper, and the image shift in the direction perpendicular to the document scanning direction (X direction) is done by adjusting the shift in the X direction of the optical system that projects the optical image of the document onto the surface of the photoreceptor. .

However, in the past, the exposure start scan and the rotation of the photoconductor to update the exposure surface were synchronized, so when there were multiple documents, each document was exposed one by one.

The copy process is completed by executing copy cycles such as development, transfer, and fixing, and when replacing the original, the recording paper for which the copy process has been completed is placed in the recording paper feed system again, and a new copy is loaded. Copies of originals are also copied in the same way, and there are problems in that it takes many copy cycles to obtain one edited copy, and that the edited image is misaligned due to misalignment when resetting the recording paper. There are also problems such as low elongation and wrinkles caused by feeding the same paper many times, resulting in image shift and poor transfer.

■Purpose The first objective of the present invention is to reduce image deviation in edited copies.
The second objective is to reduce the number of copy cycles required to obtain one edited copy. A third object of the present invention is to obtain an edited copy with less image shift using relatively simple hardware and copy cycle control.

■Configuration In order to achieve the above object, in the present invention, the mechanical system is set so that the original exposure scanning system and the photoconductor drive system can be selectively synchronized and separated in operation, and the exposure scanning is specified. The configuration is such that the driving of the photoreceptor is stopped until the area is reached, and when the exposure scan reaches the designated area, the photoreceptor is driven.

According to this, only the designated area of the document is exposed on the surface of the photoreceptor.

Therefore, by sequentially forming designated areas on the original in the 1-copy image forming area of the photoreceptor, and then transferring all at once, it is possible to obtain 1 copy in which editing has been completed, and the copy to be executed. Significant cycle savings. In addition, since image stitching and other combinations are performed mechanically on the surface of the photoreceptor, the original must be replaced many times, and each time the copy that has been transferred and fixed must be placed in the paper feed unit again. Even if the exposure cycle is repeated several times, only one transfer and fixing cycle is required, resulting in less image shift.

For example, from the manuscript shown in Figure 11, Figures 12a and 12
A copy of the form shown in Figure b or Figure 12c can be obtained in one transfer and fixing cycle. Furthermore, the copies shown in FIG. 14a or 14b can be obtained from the originals shown in FIGS. 13a and 13b in one transfer and fixing cycle, and the same recording paper can be sent to the paper feeder several times. Since there is no resetting or fixing process, the occurrence of image misalignment, paper stretching, wrinkles, etc. is greatly reduced, and the operator's work to obtain one edited copy is reduced.

When the photoconductor is stopped during document scanning and editing copy control is performed as described above, the starting edge of the document and the image forming starting edge of the photoconductor do not necessarily match, so it is necessary to constantly track the position of the image forming starting edge of the photoconductor. is preferable in editing copy control, and moreover, in aligning the transfer sheet with the image surface of the photoreceptor after performing the required multiple exposures and developing the exposed area, compared to the movement of the photoreceptor. Positioning can be easily and accurately achieved by adjusting the sheet feeding timing or vice versa, by adjusting the photoconductor feeding timing in comparison to sheet feeding.

Therefore, in the present invention, while the photoreceptor is being driven, timing pulses are counted starting from when the image forming start end of the photoreceptor is at a predetermined position, and the start end position is tracked based on the count value. Then, the relative timing of sheet feeding and photoreceptor feeding is determined in order to synchronously align the starting edge and the leading edge of the sheet in the transfer section. This allows the editing image to be aligned with the sheet easily and accurately in the transfer section.

When the photoconductor is stopped and driven as described above, the photoconductor is subjected to stress (electrostatic charge) due to the high-voltage charging electric field from the main charger and transfer charger while the photoconductor is stopped for scanning the original or replacing the original. On the other hand, the potential of that part of the photoreceptor decreases less even when exposed to light, that is, the background potential becomes higher, and black streaks appear on the copied image.

In order to prevent this, the preferred embodiment of the invention further includes:
While the photoreceptor is stopped, the charging means and the transfer means are deenergized to prevent electrostatic discharge on the photoreceptor.

Furthermore, when the photoconductor is stopped and driven as described above, the reflected light from the document is reflected while the photoconductor is stopped.

The photoreceptor is exposed to light reflected from the contact glass plate or from the document holder on the back of the photoreceptor, resulting in white spots appearing in the areas, ie, the joints of the images, or resulting in copies with blurred areas. In addition, the photoreceptor is subjected to stress, and the photosensitivity of that area is subsequently reduced.

Therefore, in a preferred embodiment of the present invention, when the photoreceptor is stopped, exposure to the photoreceptor is also stopped. This can be done by turning off the illumination light that illuminates the document, or by closing the optical path from the document to the photoreceptor with a shutter (light shielding).
In order to reduce as much as possible white smudges and blurring in the connected parts of the nine images, by turning off the illumination light and closing the light path with a shutter,
In a preferred embodiment of the invention, the illumination lamp is turned off and the optical path is blocked by a shutter.

According to this, white smear or blur does not appear in the image joint portion of the edited copy, and light from the photoreceptor is prevented.

Furthermore, when the photoreceptor is stopped and driven as described above,
With ordinary photoconductors, the total surface length of the photoconductor surface is short, so
When a designated area of a certain document is being exposed, a previously exposed and developed developed image may pass through the transfer unit. Since the recording paper is sent to the transfer section in synchronization with the movement of the developed image on the photoreceptor, the recording paper is also sent to the fixing device from the area where the transfer has been completed. When the recording paper is caught in the fixing device, if the fixing roller is stopped, the recording paper is excessively heated and discolored, and the operating conditions of the fixing roller are different, which tends to cause abnormalities in the fixing device. This problem can be solved by placing a distance between the transfer unit and the fixing unit that is at least the maximum length of the recording paper, but this would make the copying machine larger and require a large installation space, making it impractical. Not on point.

Therefore, in a preferred embodiment of the present invention, the length of the image forming surface of the photoreceptor from the exposure position to the transfer position is set to be greater than or equal to the maximum flame of the sheet. According to this, even while editing exposure is being performed on the photoreceptor for the maximum sheet size, the exposed and developed area does not reach the transfer area. Therefore, there is no need to place the fixing device particularly far away from the transfer section.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

FIG. 1 mainly shows the structure of the mechanical part of an embodiment of the present invention.

This embodiment is a transfer layer copying machine of a document table drive type in which an automatic document feeder 2 equipped with a contact glass plate 1 is driven back and forth in the left and right direction.

A document support stand 3 is attached to the automatic document feeder 2, and a rear end of a document stand 4 is pivotally supported on the support stand 3. The leading end of the document table 4 is lifted by a compression coil spring in a direction in which it comes into contact with the paper feed roller 6. A side plate 5 that defines the horizontal side of the document is attached to the document table 4 so that its position can be adjusted freely.

The document placed on the document table 4 is fed out by a paper feed roller 6, guided by a guide plate 7, reaches a paper feed roller 8, and is sent onto the contact glass plate 1 by the paper feed roller 8. A paper sensor 8S detects the presence of a document on the paper feed roller 8. An endless belt 9 stretched around a driving roller is in contact with the contact glass plate 1, and as this belt 9 is driven counterclockwise, the document sent out from the roller 8 is brought into contact with the contact glass plate 1. Move along from left to right. The document thus fed by the belt 9 is delivered onto the document delivery table 11 by a paper delivery roller 10. Although not shown, the document table 2 includes a paper feed roller 6, a paper feed roller 8.
A drive system that drives the drive roller and paper discharge roller 10 on which the belt 9 is stretched, a pulse motor that is the power source thereof, and a clutch that selectively connects the paper feed roller 6 to the drive system or separates it from the drive system. , and a clutch that connects or disconnects the feed roller 8 and belt 9 drive roller from the drive system. Although not shown, the automatic document feeder 2 is supported by guide rails of the copying machine main body 22 so as to be able to reciprocate left and right.

A slit extending in the direction X perpendicular to the plane of FIG.
is installed, and a photoreceptor belt 15 is placed below the fiber unit 13. Fiber unit 1
3 forms an image on the upper surface of the photoreceptor belt 15 in addition to the upper surface of the contact glass plate 1 (original surface). The upper surface of the contact glass plate 1 facing the upper end surface of the fiber unit 13 (
An illuminating lamp 12 for exposure illuminates the original surface (original surface), and the reflected light of the illuminating lamp 12 from the original surface on the glass plate 15, that is, the original image, is transmitted to the photoreceptor belt 15 by the fiber unit 13.
imaged on the upper surface of Note that the fiber unit 13 is made by arranging and integrating cylindrical small-diameter self-off fibers in the X direction, and the illumination lamp 12 also extends in the X direction.

A liquid crystal shutter 14 extending in the X direction is arranged between the light output end of the fiber unit 13 and the photoreceptor belt 15.
An erase unit 31 extending in the X direction is disposed adjacent to the shutter 14, and a reflective type for seam detection is provided at the end of the erase unit 31 for detecting reflective marks attached to the side edges of the photoreceptor belt 15. A belt mark sensor 32 made of a photo sensor is arranged. Note that the photoreceptor belt 15 has one seam, and the reflective mark is arranged so that the sensor 32 detects the reflective mark for seam detection when the seam is between the main charger 16 and the shutter 14. It is attached to the side edge of the photoreceptor belt a little apart from the seam in the Y direction.

The photoreceptor belt 15 is driven to rotate clockwise. The surface of the belt 15 is uniformly charged by the main charger 16 to a high potential, and the image of the document is projected onto this high potential surface via the fiber unit 13. As a result of this exposure, the high potential surface loses charge in areas where it is strongly exposed to light, and remains in areas where it does not receive light, resulting in a charge distribution corresponding to the original image. That is, an electrostatic latent image is formed on the surface of the photoreceptor belt. The developing unit 17 supplies toner to the residual charge portion of this electrostatic latent image.

This forms a toner image on the belt surface. At the transfer separation charger 23, the toner image is transferred by the registration rollers 21 onto the recording paper sent there. After the transfer, the belt surface is cleaned by a cleaning unit 18 and is illuminated with a static elimination lamp 30 to eliminate static electricity.

The photoreceptor belt 15 is stretched around a belt drive roller 44 and idle rollers 45 and 46, and is rotationally driven clockwise by the roller 44.

The length LD of the image forming surface of the photoreceptor belt 15 from just below the fiber unit 13 at the exposure position to just above the transfer separation charger 23 around the roller 45 is the maximum recording length S Y L-3Y s (Fig. 7f) T S Y L
=TSYs compatible), the registration roller 21-
It is set slightly longer than the sum of the recording paper feeding distance sd between the transfer separation chargers 23. This results in 1
While the copy image surface is being exposed for editing, the advance exposure and development section does not reach the transfer separation charger 23, and the distance between the transfer separation charger 23 and the fixing device 25 is
The maximum recording length is less than SYL-3Ys.

A cassette 19 is installed at the bottom of the copying machine main body 22 so that it can be inserted and removed in the X direction.
9P is installed. The leading end of this recording paper is pressed by the paper feed roller 20, and the trailing end is supported by an end plate 40 whose position is freely adjustable. When the end plate 40 is at the 85 position, the size sensor 41 is closed by the end plate 40, when it is at the A4 position, the size sensor 42 is closed by the end plate 40, and when it is at the B4 position, the size sensor 43 is closed by the end plate 40. Become. When the end plate 40 is at the A3 position, all size sensors 41 to 43 are open. The paper fed out from the cassette 19 by the paper feed roller 20 is sent to the registration roller 21 via the paper feed roller and paper guide, and the registration roller 21 transfers the paper to the photoreceptor belt 1 above the transfer separation charger 23.
Send the paper towards 5. The recording paper onto which the toner image has been transferred is sent to the fixing drum 25 by the transport unit 24, and then sent out of the main body 22 by the paper ejection roller 26. When transferring the image onto the paper inserted into the paper feed table 37, the paper feed roller 38 is driven instead of the paper feed roller 20.

The cleaning unit 18 includes a cleaning base 35. which is pivotally supported by the main body 22. A cleaning brush 34 pivotally supported on the base 35. It consists of a cleaning blade 33 fixed to the base 35 and a solenoid 36 that drives the base 35 from the cleaning position to the retracted position. When the solenoid 36 is energized and the base 35 moves to the retracted position, the cleaning brush 34 and the cleaning blade 33 are separated from the photoreceptor belt 15.

The copying machine main body 22 is equipped with a home position switch 28 that is closed by a striker 27H of the device 2 when the automatic document feeder 2 is in the position shown in FIG. 1 (standby position: home position). Further, a limit position switch 29 is installed which is closed by strikers 27H and 27L of the device 2 when the automatic document feeder 2 is at the exposure scanning limit position.

FIG. 2 shows the configuration of a drive system that drives the automatic document feeder 2 from side to side (Y direction) and drives the photoreceptor belt 15 and paper feed system within the copying machine main body 22. As shown in FIG.

The clamp block 48 of the automatic document feeder 2 has a wire 5 stretched between a drive roller 49 and an idle roller 50.
1 is fixed. The drive roller 49 is coupled via a bidirectional clutch 52 to a drive mechanism coupled to the main motor 47 in a forward or reverse rotation manner. Bidirectional clutch 52
When the automatic document feeder 2 is biased toward normal rotation, the automatic document feeder 2 is driven from left to right (in the document exposure scanning direction). When the bidirectional clutch 52 is biased to reverse engagement, the automatic document feeder 2 is driven from right to left (return). When the bidirectional clutch 52 is deenergized, the automatic document feeder 2 is stopped even if the drive mechanism is moving. therefore,
By energizing and deenergizing the bidirectional clutch 52 in the forward and reverse directions, the automatic document feeder 2, that is, the document set on the contact glass plate 1, is moved to the exposure slit position of the fiber unit 13, that is, the copying machine main body 22. , for
It can be driven to any position and stopped, and any area on the document can be repeatedly scanned.

A drive roller 44 and a cleaning brush 34 are also connected to the drive system connected to the main motor 47 via a bidirectional clutch 53. When the two-way clutch 53 is engaged and biased for normal rotation, the drive roller 44 rotates in the normal direction to rotate the photoreceptor belt 15 clockwise, and the cleaning brush 34 also rotates clockwise. A developing roller of the developing unit 17 is connected to the driving roller 44 by an interlocking mechanism, and when the photoreceptor belt 15 rotates, the developing roller also rotates clockwise.

The drive system connected to the main motor 47 also has a fixing drum 25 and a paper ejecting roller 26 connected by an interlocking mechanism, and while the main motor 47 is rotating, they rotate in the direction to send out the paper. There is.

A transport unit 24 is coupled to the interlocking mechanism in which the fixing drum 25 and the paper ejection roller 26 are coupled.
The registration roller 21 and paper feed roller 38 are coupled to the drive system via a unidirectional clutch 54, and the paper feed roller 20 is coupled via a unidirectional clutch 55.

A rotating slit plate 65 is also connected to the drive system connected to the main motor 47, and a photosensor 66 detects the slit of this slit plate 65 and generates one pulse of electricity every time the motor 47 rotates by a predetermined small angle. Generate a signal. This pulse is used as a reference signal (timing pulse) for determining the operation timing of each part.

With the above configuration, during normal copying operation, the main motor 47 is energized in response to turning on the copy start key, and the slit plate 65. Fixing drum 25 and paper ejection roller 26 rotate. - On the other hand, when the copy start key is turned on, the automatic document supply bag 5!2 is instructed to supply the document, and the top document on the document table 4 is placed on the contact glass plate 1, and its tail is placed on the belt 9. The length of the document detected by the sensor 8S at this time is notified from the device 2 to the main body 22. In response to this, the bidirectional clutch 52 is reversely engaged and energized, thereby moving the automatic document feeder 2 to the left and positioning the rightmost end of the document on the contact glass plate 1 directly above the fiber unit 13. At times, the bidirectional clutch 52 is deenergized and the automatic document feeder 2 is stopped. Furthermore, in response to the copy start key being turned on, the bidirectional clutch 53 is biased to engage the forward rotation, the photoreceptor belt 15 rotates clockwise, and the cleaning brush 34 rotates clockwise. do.

After that, when the sensor 32 detects the belt mark.

When the main charger 16 is turned on and the vapor sensor 38S detects paper, the clutch 54 is turned on, and when it is not detected, the clutches 54 and 55 are turned on.
is turned on, clutch 55 is turned off after a sufficient time for roller 20 to feed the paper into the paper feed system above it, and when vapor sensor 39 detects paper, clutch 54 is turned off. - direction.

When the belt surface, which has started to be charged by the main charger 16, reaches directly below the fiber unit 13, the bidirectional clutch 52 is engaged and biased for normal rotation, and the automatic document feeder 2 is driven to the right (n-light scanning). Then, at the timing when the exposed surface on the belt reaches the developing roller of the developing unit 17, a developing bias voltage is applied to the developing roller. When the developing surface on the belt reaches the paper feed distance between the transfer separation charger 23 position and the registration roller 21, the clutch 54 is turned on again, and the registration roller 2
The paper waiting at 1 is sent out toward the belt surface on the transfer separation charger 23. Transfer separation charger 23 at the timing when several sheets of paper reach transfer separation charger 23
is energized, and the toner image on the belt is transferred onto several sheets of paper.

The transferred paper is sent to the fixing drum 25 by the transport unit 24.

When the striker 27H closes the switch 29, the bidirectional clutch 52 is reversely engaged and energized, so that the device 2 is reversely driven (returned) to the left.

Next, the structure and operation for implementing the present invention will be mainly explained.

Referring to FIG. 3 showing the top surface of the document table 4, in order to set the masking (erasing) area and trimming (extracting) area on the document, there are Y-axis address input switches SYI to SYn, which are pressure sensitive switches, are arranged in a row, and masking instruction switches 57. Trimming instruction switch 5
8. Alignment instruction switch 59, five recording order instruction switches 60° page break instruction switch 61. Clear instruction switch 62
and all clear instruction switches 63 are arranged. Each of these switches 57 to 63 is equipped with an indicator light, which is lit when the switch is turned on.

The device cover located above the document table 4 of the device 2 has
A pressure-sensitive unit 56 equipped with X-axis address input switches SXI to SXm, which are pressure-sensitive switches, is mounted in a row in the X direction.

With the above configuration, the operator can place a document on the document table 4, and while viewing the image on the document, perform masking (
It is possible to specify the diagonal corner of the area to be cropped (image deleted) or cropped (image extracted). For example, SX
After 3, press SY5, then press 5X17, and then press 5Y22.
When you press , the coordinates (SX3, 5Y5) and (SX
17.22) is specified, and if the switch 57 is pressed before or after that, the area is specified for masking, and when the switch 58 is pressed, the area is specified for trimming. The five recording order designation switches 60 are used to designate the processing order of areas designated for masking or trimming during editing copying, and the alignment designation switch 59 is for specifying the processing order of areas designated for masking or trimming. It is intended to give instructions. The clear instruction switch 62 instructs to clear the information input just before, and the all clear instruction switch clears (initializes) all the information input just before.
This is to give instructions.

FIG. 4 shows a part of the operation board included in the copying machine shown in FIG. 1. 58P is a power switch, 59P is a copy start key, 60I is an interrupt key, 60C is a clear/stop key, 62T is a numeric keypad for inputting the number of copies, etc., 63C is a 2-digit display, 63E is an edit key, 6
4 is an indicator light that displays the size of the recording paper loaded in the cassette 19.

FIG. 5 schematically shows the electric circuit of the copying machine main body 22 of FIG. 1. Please refer to FIG. The main control section.

Microcomputer (CPU) 67, system controller 68. Counter 69. Read-only memory (RO
M)70. Read/write memory (RAM) 71, non-volatile read/write memory (NRAM) 72° input/output board (I
lo) 74.75 mag. A battery 77 is connected to the power line of the nonvolatile read/write memory 72 via a backup circuit 73. A power line from the power supply unit 76 is connected in parallel to a battery 77 via a diode. An eraser driver 79 and a liquid crystal shutter driver 78 are connected to the input/output cupboard door 4 . In addition to the entry/exit capo door 4,
Belt mark detection circuit 9 disconnection jam sensor connected to belt mark sensor 32.

Double feed detection sensor, P sensor, toner sensor, position sensor 28, 29 of automatic document feeder. Other sensors and switch units, jam indicators.

Operation boards etc. are connected.

A driver for driving the main motor 47, etc., a lamp regulator for controlling the illumination lamp 12, a fixing heater control unit, a high voltage power supply unit, a drum heater control unit, a clutch and solenoid driver, etc. are connected to the input/output cupo door 5. .

Counter 69 is used to generate eraser 31 control timing.

FIG. 6 schematically shows an electric circuit of the automatic document feeder 2 shown in FIG. 1. Please refer to FIG. The main control unit is a microcomputer (CPU) 80° system controller 81. Read-only memory (ROM) 83. Read/write memory (RAM) 84° Input/output port (Ilo) 85.8
It is ranked 6th magnitude. The input/output port 85 includes an encoder 87. which generates data indicating which of the aforementioned X-axis address input switches SXI to SXm is turned on. An encoder 88 that generates data indicating which of the Y-axis address input switches SYI to SYn is turned on. switch 57
-63 and indicator lights (including drivers, etc.) built into those switches are connected.

The input/output port 85 is also connected to sensors for sequence control of automatic document supply and paper ejection, and for abnormality checking, and a status indicator light.

The input/output port 86 is connected to a host interface for exchanging data and control signals with the driver and clutch driver that drive the pulse motor, and the microprocessor 67 of the copying machine main body 22.

FIGS. 7a and 7b show a plan view and a longitudinal sectional view of the eraser 31. Referring to each figure, this eraser 3
1 consists of a printed circuit board, a case 76°, an eraser driver 79 shown by a dotted chain line, and a large number of light emitting diodes. In the case 76, partition walls 76a are formed at equal intervals of 21 pitches, and light emitting diodes are arranged in the spaces defined by each partition wall. Specifically, here, 150 light emitting diodes are arranged in a line. Therefore, by using this eraser,
The 3001 width area can be divided into 2+u+ minute areas and each minute area can be selectively erased.

FIG. 7c shows a specific configuration of a circuit including the counter 69 and the eraser driver 79. See Figure 7c. Counter 69 is equipped with two programmable interval timers 93 and 94. Timers 93 and 94 used here are Intel 8253 (
8254). Simply put, this counter includes three 16-bit counters, and operates in one of six modes depending on the contents of data set in an internal control register. Each mode is as follows.

Mode 0: After setting the terminal count mode, the counter output state is low level L. When a value is set in the counter, it starts counting the clock input. When the terminal count is reached, the output state becomes high level and maintains that state.

Mode 1: Programmable One-Shot Each timer's gate input functions as a trigger input in this mode. When there is a trigger input, a wall shot pulse (L active) with a preset clock length starting from the next clock appears at the output.

Mode 2: A pulse (L active) at one clock interval is outputted once every n clock inputs according to the value n preset in the rate generator register.

Mode 3: Rectangular wave rate generator Same as mode 2, but outputs a rectangular wave with a set rate value of 172 counts.

Mode 4: When the software trigger strobe mode is set, the output is at a high level H, but the clock input starts counting by setting a value in the count register, and pulses at one clock interval (L active) are generated by counting up. Output only once.

In mode 5, the strobe gate terminal of the hardware trigger functions as a trigger, and counting starts at the rising edge of the trigger input. The output goes to low level L for one clock interval only once during terminal counting.

The count input terminals CLKO, CLKI and CLK2 of each of the three counters (0°1.2) of the programmable interval timer (hereinafter abbreviated as timer) 93 and 94 are connected to the output terminal of an oscillator that generates clock pulses of a predetermined period. It is connected. Counter 0 of timer 93. counter 1
and each gate terminal GATEO of counter O of timer 94
, GATE1 and GATEO are commonly connected to the output terminal 0UT2 of the counter 2 of the timer 94. The gate terminal GATE2 of counter 2 of timer 93 is
is connected to the output terminal 0UT1 of the counter 1 of the timer 9.
The gate terminal GATE1 of the counter 1 of the timer 94 is connected to the output terminal 0UTO of the counter O of the timer 94.
The gate terminal GATE2 of counter 2 is connected to the power supply line (+
Vcc). The output terminal of the oscillator is connected to the clock output terminal (CLOCK
), and the output terminal 0U of the counter O of the timer 93
TO is connected to the latch output terminal (L
ATCH). Timer 93 counter 2
The output terminal 0UT2 of the timer 94 and the output terminal 01JTl of the counter l of the timer 94 are exclusive or game) -EOR
The output terminal of the gate EORI is connected to each input terminal of the gate I, and the output terminal of the gate EORI is connected to the signal output terminal (S-
OUT).

Each output terminal (CLOCK) of the counter 69.

(LATCH) and (S-OUT) are respective input terminals (CLOCK) of the eraser driver 79.

(LATCH) and (S-IN). The eraser driver 79 includes 19 integrated circuits (Toshiba TD62801P) with the same configuration.
Equipped with CI 9.

As shown in Figure 7d, each integrated circuit consists of an 8-bit shift register, an 8-bit latch, a gate, and a driver, and an output enable control terminal ENABL.
E, latch control terminal LATC) I, signal input terminal 5
-IN, a clock input terminal CLOC, a reset control terminal RESET, a signal output terminal 5-OtJT, and an 8-bit driver output terminal.

Note that an overlined symbol in the figure indicates that the signal line is L active.

The latch control terminals LATCH of each integrated circuit are commonly connected to the input terminal (LATC)l) of the eraser driver 77, and the clock input terminals of each integrated circuit are commonly connected to the input terminal (CLOCK) of the eraser driver 77. ing. Input terminal of eraser driver 77 (S-I
N) is connected to the signal input terminal 5-IN of the integrated circuit ICI, and is connected to each integrated circuit IC2, IC3, Ic4 . IC5,・
..., signal input terminal 5- of ICl3 and ICI9
IN is for each integrated circuit ICI, IC2, IC3,
It is connected to the signal output terminal 5-OUT of IC4, . . . , IC17 and IC:18.

That is, the integrated circuits ICI to ICI9 are connected in series with each other, thereby forming a 152-bit shift register in total. 150 light emitting diodes LED1 to LED150 of the eraser 24 are connected to the output terminal of each bit via a resistor, respectively. Note that the last two bits are not used here.

Therefore, at the moment the latch signal appears, the bit holding a high level H (which is inverted at the output of the driver) energizes the light emitting diode, and the bit holding a low level L energizes the light emitting diode. Since it is deenergized, signal line 5
By inputting erase information as 150-bit serial data to -IN and applying a latch pulse when the erase is completed, any area of the eraser 31 can be selectively energized.

The copyable area on the surface of the photoreceptor belt 15 in one copy cycle is expanded and shown in FIG. 7f. Since the photoreceptor belt 15 moves at a constant speed, the position of the surface of the photoreceptor belt 15 in the scanning direction (shown as the original scanning direction in the figure: Y) can be expressed in terms of time when viewed from a fixed position.

The vertical direction in the figure is the width direction, that is, the X direction.

For example, when copying a B4-size document image using an A3-size copying device, as shown in Figure 7F, the document image copying area (the outline of the white area within the diagonal line area) is the copyable area (outer side). (outline of the shaded area). In this case, the leading edge erase (full width erase) is performed in the area from the leading edge of the copyable area to the leading edge of the original image (time TSYs"TSYo), and the area where the original image exists (time TSYs"TSYo) is performed.
Y□=TSYe), site erase (erase the area other than the original width) is performed, and in the area from the rear edge of the original image to the rear edge of the copyable area (time TSYe"TSYL), rear edge erase (full width erase) is performed. This is also done in most conventional general copiers.

When erasing or extracting a specific area of the original image for image editing, it is necessary to further erase (erase the electrostatic latent image) within the area of the original image.

In other words, FIG. 7f shows the case of erasing an area, and at a position in the scanning direction (Y direction) specified by time TSYj to SYk, sxh to SXi in the width direction (X direction)
Erase the area. Since the eraser 31 is arranged so as to cover the entire area at the position SXo'=SXw along the width direction axis, it is possible to control which area of the eraser 31 the light emitting diodes are energized or deenergized. This determines the erase area in the width direction.

Further, as described above, since information indicating which region of the light emitting diode is to be energized is given to the eraser 31 as a serial signal, the erased region in the width direction can also be expressed in terms of time. By controlling the counter 69 shown in FIGS. 5 and 7c, a signal for energizing the eraser driver 79 can be generated.

FIG. 7e shows the signal timing of each part of the counter 69 for erasing at time TYj shown in FIG. 7f. Note that IC20 and IC2 in FIG. 7e
1 indicate timers 93 and 94 (FIG. 7c), respectively. The operation will be explained with reference to FIG. 7e. In order to operate this counter 69, first each timer 93.
It is necessary to perform 94 program sets. Program setting in this case is performed by "mode setting."

That is, the operation modes of counters 0, 1, and 2 of timer 93 are set to 5, 1, and 1, respectively, and the count registers of counters 0, 1, and 2 of timer 93 are set to M, 31-1, and S2 (7th e). (see figure). Next, the operation modes of counters 0, 1, and 2 of the timer 94 are set to 1.1 and 0, respectively, and the timer 94
The count registers of counters 0, 1 and 2 are set to PL-1, P2 and 2 (see FIG. 7e), respectively.

When the mode setting is completed, the output signal (IC21-OUT2) of the counter 2 of the timer 94 is set to a low level L, and becomes a high level H after counting two pulses. The three counters to which this signal is applied to their gate terminals, namely timer 93 O, l and timer 94 O, are triggered and begin counting at the rising edge of the signal.

Here, since counter 0 of timer 93 is set to mode 5, the output signal (IC20-OUTO) remains at high level H, but counter 1 of timer 93 and counter O of timer 94 are set to mode 1. Since it has been
At the falling edge of the next pulse after the gate terminal becomes high level H, those output signals (IC20-OUTI and IC21
-0UTO) is set to low level L.

Counter 1 of timer 93 has sx in the count register,
-1 is set, so 5 after starting counting.
At the xo-1st pulse, its output signal (IC20-OUT
I) is inverted to high level H. Since the counter 2 of the timer 93, to which this signal is applied to the gate terminal, is set to mode 1, the output is output at the falling edge of the next pulse (SX, the th pulse) when the signal becomes high level H. signal(
IC20-0υT2) is set to low level L.

Counter 0 of timer 94 has 5 in its count register.
Since xh-t is set, its output signal (IC21-OUTO) is set to high level H at the 5Xh-1st pulse. Since the counter 1 of the timer 94 to which the signal is applied to the gate terminal is set to mode 1, the next pulse when the signal becomes high level H (
At the falling edge of the SXhth pulse), the output signal (IC21
-OUTI) is set to a low level L.

When the SXi-th pulse appears, the output signal (IC21-OUTI) of the counter 1 of the timer 94 is inverted to high level H, and when the SXe-th pulse appears, the timer 93
The output signal (IC20-OUT2) of the counter 2 is inverted to a high level H. When the SXLth pulse appears,
Since the counter 0 of the timer 93 is set to mode 5, its output signal (IC20-0UTO) is cursed with an L level pulse of one clock width only once.

Therefore, two output signals (IC20-OUT2 and IC
2l-OUTI) signal 5-O which is the inverted exclusive OR of
UT has a period corresponding to the number of pulses: 5Xhs-SXho, 5Xh=SXi and 5Xe=SXLf);
A high level H appears.

Since this signal 5-OUT is read into the shift register of the eraser driver 79 in synchronization with the clock pulse, the number of these pulses corresponds to the position of the light emitting diode of the eraser 31 connected to the eraser driver 79.

Also, the high level I of the signal 5-OUT means energizing the light emitting diode, that is, erasing the image of that part.
This signal causes the width direction (7) SX shown in FIG.
s = SXh, SXh ~ SXi and SX? -5XL
The range is subject to charge erasure.

In the example explained above, the Y direction is TSYj=TSYk,
Although it is assumed that an area specified by the direction 5Xh-5Xi is to be erased, it is also possible to extract a specified area and erase other areas. In that case, the 7th d.
S-OUT (7) SXh-5Xi (7) shown in the figure
') It is sufficient to invert the signal level (H/L) at the timing. This means that the operation of counter 2 of timer 93 is prohibited. In other words, if the output signal (IC20-OUT2) of the counter 2 of the timer 93 remains at a high level H during the period 5Xh-5Xi, the level of the signal 5-OUT during that period will be in the state shown in FIG. 7e. Invert against.

Whether to erase (masking) or extract (trimming) the image in the specified area is determined when setting the program (mode setting) of the timer 93, 94, and the contents of the program are changed according to the determination result. As mentioned above, it changes slightly. Each timing TSYs, TSYo, TS
Yj, TSYk, TSYet TSYL, 5
X (1.

SXh, SXi, SXa, and SXL and erase (
Masking)/extraction (trimming) information is stored in a predetermined memory in advance.

FIG. 8 shows the liquid crystal shutter 31 and shutter driver 78.
Shutter driver 7 showing the configuration of (78A+78B)
8 control unit 78A includes a microprocessor 114.8 that controls the entire control unit. -R for time memory
AM116. ROM 115 in which input character information and control information are stored in advance, input/output interface 118 ~
120. A data bus that connects these, and a decoder 121 that generates liquid crystal segment electrode activation signals from data from the input/output interface. It consists of a bidirectional buffer 122 and a synchronization circuit 117 for interfacing with the microprocessor 67 of the main control section (FIG. 5).

The liquid crystal shutter 14 has two rows (rows A and B) of segment electrode arrays in which destination control segment electrodes are arranged over the maximum copy width at a pitch of 4 dots/+am per -row. When a non-transparent energizing voltage is applied to each segment electrode, the liquid crystal in that area becomes non-transparent, and the fiber unit 1
3 to the photoreceptor belt 15. Main control unit (
microprocessor 67, ROM 70 . R.A.
Information from M71 and NRAM72 powers it in two control modes.

First, in the normal shutter mode (blocking of exposure light from the fiber unit 13 to the photoreceptor belt 15), all segment electrodes (A row and B row) are energized at the same time.

In the character information print mode, the B row located downstream of the A row is activated with a delay of T excitation time from the activation timing of the A row. The time 2T is the time during which the surface of the photoreceptor belt moves by one dot (4 dots/+am) forming a character. Each letter (including numbers for summer) is assigned a vertical P dot and a horizontal P dot, and the segment electrode energizing voltage appears as one pulse per half dot movement (T) on the surface of the photoreceptor. It is generated in synchronization with the drum synchronization pulse (66 detection pulses). In the case of the mode for printing character information, the illumination lamp 12 is turned on while the photoreceptor belt 15 is driven, and the A column write information is updated to that of the next line every two synchronization pulses, The column write information is assumed to be that of column A delayed by T. This character information print mode is used for page recording, copying machine management section name recording, printing out image information from outside the copying machine, and the like.

Next, the control operation of the microprocessor 80 of the automatic document feeder 2 will be explained. The microprocessor 80 responds to a data transfer instruction from the microprocessor 67 of the copying machine main body 22, transfers status data and editing data, and feeds paper.

In response to a paper discharge instruction, the document is supplied from the document table 4 onto the contact glass plate 1, the document is discharged from the glass plate 1, and the document size is detected and the document size is notified when the document is supplied. In addition, if an abnormal condition occurs, it will be notified. Among these operations, those other than the transfer of editing data are operations known in conventional automatic document feeders, so a detailed explanation will be omitted here, and we will mainly focus on the control operations related to image editing. The control operation of the microprocessor 80 will be explained with reference to the flowcharts shown in FIGS. 9a to 9e.

When the power is turned on, the microprocessor 80 has input/output ports, internal registers, counters, and timers.

Clear flags, etc. and set them to the state assigned to the standby state (initialization in step 1). In addition,
Hereinafter, the word step will be omitted in parentheses.

Next, the detection signal of the sensor 8S etc. is read and it is determined whether it is normal or not (<2.3). If it is normal, it informs the microprocessor 67 of the ready (5), and if it is abnormal, it informs the microprocessor 67 of the abnormal state (4). The microprocessor 67 displays the abnormal condition on the operation board.

If successful, microprocessor 80 then reads the input status of input/output interfaces 85 and 86 (6
). That is, it is checked whether the various keys or switches shown in FIG. 3 have been operated, or whether a start signal has arrived from the processor 67. If no switch is operated and no start signal arrives, step 6.7゜11.15, 19, 21, 28, 29,
30, 31, 32-6.7. ...and wait for input.

(1) When the masking instruction switch 57 is turned on, the contents of the masking flag register (a register that sets information indicating whether remasking (image erasure) has been instructed by the switch 57) becomes 1 (if it has already been instructed). If it is not 1, set MF to 1 and turn on the masking indicator light (indicator light built into switch 57) 9).
). The trimming flag register TF is cleared (set to 0) and the trimming indicator light T is turned off (10).

(2) When the trimming instruction switch 58 is turned on, in the same manner as in (1) above, the trimming (image extraction) flag register TF is set to 1, the trimming indicator light T is lit, and the masking flag register MF is cleared. Turn off the masking indicator light (12-14).

(3) When the shifting instruction switch 59 is turned on,
Check whether the content of the shifting flag register SF is 1 (shifting has already been instructed)16), and if it is not, then shift (image extraction from the area specified for masking or cropping) is instructed this time. As, 1 to SF
and turn on the alignment indicator light (17). Already S
When the content of F is 1, the current 59 on is
Assuming that an instruction to release the approach has been given, the SF is cleared and the indicator light S is turned off (18).

(4) When one of the recording order instruction switches 60 is turned on,
The number of the switch turned on (1 to 5) is entered in the order register j.
(one of the switches) is memorized, the indicator light built into that switch is turned on, and the indicator lights of the other switches in 60 are turned off (20). Note that the recording order refers to the order in which two or more areas of one or more original documents are trimmed or masked from one end of the same recording paper to the other end.

(5) When the page break instruction switch 61 is turned on, the page register k is updated with data indicating the number indicated by the content plus 1 (22), and a check is made to determine whether the content in the register is 6 or more. Check (23).

The maximum number of manuscripts for editing is set to 5, so if the number is 6 or more, there will be an incorrect input and the contents will be changed to 1 in the register.
(24). When the page number is set in the register, the indicator light of one of the switches 60 corresponding to the number indicated by the data in the register is turned on, and the indicator lights of the other switches of the switch 60 are turned off (25). As a result, each time the page change instruction switch 61 is turned on, the contents of the register increase by one, and an indicator light indicating this number lights up. Next, after waiting for tl to elapse, the microprocessor 80 turns on the indicator light of the switch 60 corresponding to the contents of the order register j again, and turns off the other indicator lights of the switch 60 (27). That is, after turning on the indicator light indicating the original (number of sheets) for which input has been completed due to a page break, after t1, the original No. is turned on.

Turn off the indicator light indicating the recording order, and turn on the indicator light indicating the recording order.

(6) X-axis address input switch SXI to SX+m 1
When the switch is turned on, the process proceeds from step 29 to step 33 in FIG. The data is transferred to the processor 67 (33). processor 6
7 displays the switch No. SXx on the display 63C. Next, the processor 80 checks whether the contents of the register 5XIF is 1 (indicating that the X-axis address input switch has been turned on once) (34), and if it is not 1, the contents of the register 5X2F are 1. (Indicating that the X-axis address input switch was turned on twice) Check if it is 35), and if it is not 1 (this is the first time the X-axis address input switch was turned on), Set 1 and store SXi in register x1 (36)
, the contents of register 5X2F were 1 (already
When reading that the axis address input switch is on), it is assumed that the input is to be redone, and register 5X2F is cleared (39), 5XIF is set to 1, and SXi is stored in register x1 (36). Register 5XIF
When the content of is 1, it is cleared, 1 is set in register 5X2F, and SXi is stored in register SX2 (38). When one of the X-axis address input switches SXI to SXm is turned on in steps 33 to 39 above, the turned-on switch No., SXi is displayed on the display 63C and stored in the register X1. When one of the X-axis address input switches SXI to Sx■ is turned on again, the turned-on switch No., SX
i is displayed on the display 63C and stored in the register X2.

(7) When one of the Y-axis address input switches SYI to SYn is turned on, the process proceeds from step 30 to step 49 in FIG. is stored in the input register, and the switches NO and SY1 are transferred to the microprocessor 67 (49). The processor 67 displays switch No. and SYi on the display 63C. Next, the processor 8o checks whether the contents of the register 5YIF are 1 (5o), and if not, the processor 8o checks whether the contents of the register 5YIF are 1 (5o), and if
Check whether the content of Y2F is 1 (indicating that the Y-axis address input switch was turned on twice). If not, set 5YIF to 1 and set SYi to register Y1. Memorize (52). Register 5Y2
When the content of F is 1, it is assumed that the input is to be redone, and register 5Y2F is cleared (55), 5Y
Set 1 to IF and store SYi in register Y1 (52). If the content of register 5YIF is 1, clear it, set 1 in register 5Y2F, and store SYi in register SY2 (52). 54) When one of the Y-axis address input switches SYI-SYn is turned on in steps 49-55, the turned-on switch No., SYi is displayed on the display 63C and stored in the register Y1. When one of the Y-axis address input switches S'/1 to SYn is turned on again.

The switch No. SYi that was turned on is displayed on the display 63.
C and stored in register Y2.

(8) 1a (6) and (7) Te, registers XI, X
2. If switch numbers are memorized for all of Yl and Y2, the diagonal corner of a certain area (Xi, Yl), (X2.
Y2) (7) It is assumed that there is an input, and at this time, 5X2
Since the data of F and 5Y2F are both 1, the contents of the trimming instruction register TF and masking instruction register MF are referred to through step 40.41 in FIG. 9b, and it is determined that the contents of the trimming instruction register TF are 1. If there is a trimming instruction for the area indicated by diagonal corners (Xi, Yl), (X2.Y2), the address is determined in table T by the contents of order register j, and the contents of SF and register are specified. the contents of and register XI,
Yl, X2. Store Y2 in memory.

The contents of table T are as follows, for example.

Table T1 Note that the first page of the manuscript is shown in Figure 13a, the second page is shown in Figure 13b, and the edited copy shown in Figure 14a is obtained. Setting data, 5Xhl, 5Yjl, 5Xil and 5Y
kl is A, a of the arrangement in the X direction of the manuscript shown in FIG. 13a.
, A' is data specifying the area, 5Xh2,5Y
j2, 5Xi2 and 5Yk2 are the data specifying the E, e and E' areas in the X direction of the original shown in FIG. , advance recording area A.

This command instructs to bring it closer until it touches the a, A' area.

When the content of the masking instruction register MF is 1, it is assumed that there is a masking instruction for the area indicated by diagonal: l −1−(Xi, Yl), (X2.Y2), and the order register j is stored in the table M. Specify the address with the contents of
The contents of F, the contents of register and register XI.

Yl, X2. Store Y2 in memory.

The contents of table M are, for example, as follows.

Table M1 Note that this is setting data when obtaining the masking copy shown in FIG. 7f.

Note that 1. The contents of tables T and M set by switches around the Og manuscript table 4 are illustrated below.

Rate table T2 when editing the copy shown in Figure 12b from the original shown in Figure 11 Rate table T3 when editing the copy shown in Figure 12c from the original shown in Figure 11 *Figures 13a and 13b 14b from the manuscript shown in
When editing the copy shown in the figure, this table T4 Note that in the above tables M and T, the page number.

When setting a document on the document table, the top page is the first page, and then the page number is placed at the bottom.

A page is virtually allocated to each manuscript in such a way that the size of the document is enlarged.

The data in the tables M and T are created in response to switch operations around the document table 4 by the operator. In other words, if the operator who wants to edit first presses the edit key 63E on the operation board and presses the indicator light while it is lit, the light goes out and the editing is canceled), and then the switch shakes around the document table 4. Create tables M (masking specification) and T (trimming specification). In this process, if there are multiple originals, first determine the page order to be set on the original platen 4 (the first page is set at the top) before actually starting copying, and then print each original in one page. Place each sheet on the document table 4, and compare the image on the document, each of the X-axis address input switches, and each of the Y-axis address input switches to correspond to the diagonal corners of the area to be masked or trimmed. Press the X, Y address input switch, specify the area for masking or trimming with switches 57 and 58, and shift the position by considering the position of the area on the original and the copy you want to obtain. If necessary, operate the switch 59 and input the masking or trimming order using the switch 60. When this is completed for all manuscripts (maximum number of 5 sheets), the manuscripts are placed on the manuscript table 4 with the younger pages facing up. In response to this input operation, microprocessor 80 creates tables T and/or M using the control operations described above.

Returning again to the flow shown in FIG. 9a. When the clear instruction switch 62 is turned on, steps 31 to 9d
The flow shown in FIG. 9d, which proceeds to step 56 shown in the figure, is an error clearing operation that clears the immediately previous input data. When it comes to this SXi
On information and data set based on it,
Reset to the one immediately before SXi on detection. A detailed explanation of the error clearing operation will be omitted here.

This clear instruction switch 62 is used when an incorrect input is made.
Use it to erase.

When the all clear instruction switch 63 is turned on, the process returns to initialization (1) in FIG. 9a, and all registers,
Clear tables, counters, flags, timers, etc.

This switch 63 is used to erase all previously set data when attempting to set new Ig collection data.

During normal copying, the operator presses the edit key 63
H indicator light is off (if not, edit key 63
Turn on the copy start key 59P and turn on the copy start key 59P. When attempting to edit copy, first turn on the indicator light of the edit key 63E, and then
As aforementioned.

Enter the data (tables T, M) required to obtain a copy of the desired image array from the desired original, and convert the original into large pages N.
Set the page assigned to page o on the top with the page assigned to page 1 facing down, set it on the document table 4, and turn on the copy start key 59P. In response to this on,
The microprocessor 67 of the copying machine main body 22 starts sequence control of various elements within the copying machine main body 22, and
A start instruction signal is given to the microprocessor 80 of the automatic document feeder 2 at a predetermined timing.

When a start instruction is received from the microprocessor 80, the microprocessor 80 proceeds from step 28 in FIG. 9a to document feed/discharge control in FIG. 9e. In this document feed/discharge control, first, the presence or absence of a document is checked by referring to a detection signal from a document platen sensor (not shown) installed at the paper feed roller 6 (69). If it is absent, this is notified to the processor 67 (70) and the process returns to input reading (6). The processor 67 displays on the operation board that there is no document.

When detecting the document, the processor 80 detects the table T
and M are transferred to the microprocessor 67 (71). Note that when the indicator light of the edit key switch 63E is lit, the microprocessor 67 performs the result copy control based on the data, but when the indicator light is not lit, the microprocessor 67 performs one normal copy control. , performs copy processing to copy the original image as is.

Now, after transferring the data of tables T and M, the processor 80 energizes the pulse motor, and the paper feed roller 6, paper feed roller 8. The paper feed belt 9 and paper discharge roller 10 are driven, and counting of timing pulses (66 slit detection pulses) is started (72). As a result, the uppermost sheet of the document is fed out from the document table 4. At the timing when the fed document is sent out by the paper feed roller 8 and is pulled by the belt 9 (after T1 from the start of paper feeding), the paper feed roller 06
The clutch coupled to is deenergized to stop driving the paper feed roller 6 (73.74). However, the paper is pulled by roller 8,
Roller 6 is rotated by the paper and spins idly. The reason why the feeding drive of the paper feed roller 6 is stopped in this way is to prevent the next paper from being fed out successively.

Next, the paper feed roller 8 and belt 9 are stopped at the timing when the tail end of the document reaches just below the leftmost end of the belt 9 (
75.76). The presence or absence of a document is detected by a paper sensor 8S, and after a predetermined period of time has passed since the paper sensor 8S changes from paper detection to paper non-detection (at the timing when the trailing edge of the document advances directly below the belt 9), the roller 8 and belt 9 stop. Further, the sensor 8S counts timing pulses after detecting the presence of paper until detecting the absence of paper, and notifies the processor 67 of the count value as the document length.

Thereafter, the pulse motor is stopped at the timing when the document that was on the contact glass plate 1 when the drive of the belt 9 was started is discharged onto the document discharge table 11 by the discharge roller 10 (77.78). This causes the paper ejection roller 10 to stop. Then, the processor 67 is notified of the completion of document setting (79). At the same time as or before or after transmitting the start signal to the automatic document feeder 2, the processor 67 reversely engages and energizes the bidirectional clutch 52. The yX document supply neck 2 is driven to the star 1-position (the position where the right end of the document on the contact glass plate l is located directly above the fiber unit 13). Thereafter, at a predetermined timing, the bidirectional clutch 52 is engaged and energized for normal rotation to start rightward driving (exposure scanning) of the automatic document feeder 2.

Next, processor 80 waits for the next instruction from processor 67 (80). Then, when the next feed instruction signal (copy completion signal for the set number of copies for one original) arrives (82), it is checked whether there is any original on the original platen 4 (83), and if there is not, it is determined that there is no original. The processor 67 is notified (70).

When the processor 67 receives the absence of a document after completing one copy cycle (the process of making - copies), it notifies the processor 80 of the copy end. processor 8
0, when a copy end signal (end of copying of the set number of final originals) arrives, the pulse motor and clutch are energized to drive the roller 8, belt 9, and paper ejection roller (84), and start counting timing pulses. 85)
After that, the pulse motor is stopped at the timing when the document that was on the contact glass plate 1 when the drive of the belt 9 was started is discharged onto the document discharge tray 11 by the discharge roller 10 (86.87). .

The above is the input reading control and document feed/discharge control of the microprocessor 80 of the automatic document feeder 2.

Next, the control operation of the microprocessor 67 of the copying machine main body 22 will be explained. This processor 67 reads input from the operation board and controls the copy sequence.

Detects status and handles abnormalities. These controls are
Since various types of control are known, copy processing control, particularly editing copy control, related to the present invention will be described below with reference to flowcharts shown in FIGS. 10a to 1og.

When proceeding to the copy process, the processor 67 first sends a start signal to the processor 80 of the automatic document feeder 2 (90), and checks whether editing is instructed (90).
91). Note that the contents of the register EDF are set to 0 due to initialization (not shown) immediately after the power is turned on, and the contents of the register EDF are set to 0.
The 3E indicator light is off. When the edit key 63E is then pressed, 1 indicating an "edit" instruction is set in the register EDF, and the indicator light is turned on. After that, when the content of EDF is 1 (indicator light lit), edit key 63E is pressed again.
When is pressed, the EDF is cleared and the indicator light is turned off. When the edit key 63E is pressed when the content of EDF is O, 1 is set in EDF and the indicator light is lit. That is, 1 in the EDF content indicates that 1g collection is instructed, and 0 indicates that there is no editing instruction.

When editing is not instructed (EDF=O), one normal copy cycle is executed (92). That is, in a predetermined sequence, the recording paper feeding roller is driven/stopped, the main charger is turned on/off, the device 2 is exposed to scan/returned, and the illumination lamp is turned on/off.

On/off of the developing bias, on/off of the registration roller 21, and on/off of the transfer separation charger.

etc. When one copy cycle is executed, the content of the copy number counter is updated to a larger number by 93),'
When the copy count value reaches the set number (94
), the end cycle is terminated (95), and the process returns to the main routine (not shown).

If the set number has not been reached, the process returns to the main routine to continue executing copy cycles.

Next, the control operation for editing copy will be explained.

When editing is instructed (EDF=1), feeding of the recording paper to the registration roller 21 is started (96).The recording paper is fed out from the cassette 19 by rotation of the paper feed roller 19P for a predetermined short time. Alternatively, the paper feed roller 38 continuously rotates to draw the paper from the manual paper feed table 37. The latter is executed when the sensor 38S is detecting paper at the start of paper feeding, and the former is executed when the sensor 38S is not detecting paper. In the case of the former paper feeding, the recording paper size is determined based on the detection signals of the size sensors 41 to 43, and in the latter case, the recording paper size is determined based on the detection signals of the vapor sensor 38S.
ti - Determined by the number of timing pulse counts while the paper passes. In all cases, the leading edge of the recording paper is sensor 3.
9, the clutch 540 is kept on until the tip fully contacts the registration roller 21, and the clutch 54 is turned off at the timing when the tip fully contacts the registration roller 21.

After starting such sheet feeding, the clutch 53 is engaged and biased in the normal rotation to start clockwise rotation of the belt 15 (97
).

Next, it waits to receive data on tables M and T and data on the length of the document fed onto the contact glass plate 1 from the processor 80 of the automatic document feeder 2 (98). If "no original" is received while waiting (99), the copy cycle becomes meaningless, so set the paper ejection process (non-transfer ejection of the recording paper that has started to be fed to the registration rollers 21), A no-document indicator light (not shown) on the operation board is turned on (100).

When the data of tables M and T and the document length data are received, the processor 67 sets the page register PG to 1.
and set the contents of order register AP to 0 (101
), M (masking), T (trimming) timing setting (102) is executed. The details will be described in detail later with reference to FIGS. 10b to 1.08.

After timing setting (102), exposure and development (103)
Execute. This content will also be described in detail later with reference to FIGS. 10e and 10f. After exposure and development (103), transfer (104) is performed to obtain an end cycle cent (
95). The contents of the transfer (104) will be described later with reference to FIG. 10g.

First, with reference to FIGS. TOB to FIG. 10D, M.

The contents of the T timing setting (102) will be explained. Roughly speaking, in this timing setting (102), based on the data of tables M and T, the exposure scan timing, erase timing and erase area of each document, advancement and stop of the photoreceptor belt 15, and these settings are determined. Accordingly, the on/off timing of the main charger 16, the on/off timing of the lighting lamp 12, the on/off timing of the shutter 14 (
The timing of light shielding)/off (light transmission) and document change (next feeding) timing are determined and developed on the timing chart.

First, check the contents of the order register AP (105
). If AP=0, it is the initial stage of entering the M and T timing settings, so the contents of the order register AP (which is associated with the order data j of tables M and T) should be set to 1 (106), register ' Set the contents of lc (timing judgment information) to 0 (107), ! The contents of the collection event register CCN (which corresponds to the number of the timing table to be created from now on) are set to 1 (10g).

Next, it is checked whether or not the order data J indicated by the contents of the order register AP exists in the table X or T (109M).

109T).

When the table is in the table (masking processing), the output data for normal exposure and document scanning up to the masking designated area is stored in register C of the timing table.
Set in the column indicated by the CN content.

Here, an example of the contents of the data written to the timing table is as follows.

Timing Table 1 In this timing table, CCN corresponds to the contents of the edit event register CCN, and its numerical value means the execution order, which is the layer number in the timing table.

Yt,c is data indicating the document scanning position from the document scanning start point, and indicates the timing at which data in the column where Ytc exists is output.

M/T is data specifying masking or trimming, II is masking designation, and II is trimming designation.

XI and X2 are data indicating the region boundary in the X direction of the masking or trimming region.

ORB is data for instructing on/off of the developing bias; H instructs on (bias application) and L instructs off (bias cutoff).

NCR is data that instructs on/off of the main charger 16, H instructs on and L instructs off.

CHT is data that instructs whether the shutter 14 is on (light shielding) or off (light transmitting), and )1 instructs on and L instructs off.

BLT turns the belt 15 on (clockwise rotation)/off (
11 indicates on, and L indicates off.

DC5 is data that instructs to turn on (drive)/off (stop) the scanning drive (rightward) of the automatic document feeder 2;
1 indicates on, L indicates off.

DCC is data indicating whether a next page feed (page break) is necessary, and 11
indicates the key, and L indicates the unnecessary.

E is data instructing whether or not the g collection processing is completed, and II
Instructs to end, and L instructs to continue editing.

The data of the above timing table 1 was created based on the above-mentioned table M1 in which masking was specified for the shaded area shown in Fig. 7f, and the original image is reproduced only in the white part shown in Fig. 7f when copying. It becomes something.

If the table M1 has the masking area data shown in FIG. 7f, the timing table 1 is created based on it. Using this as an example, to explain the process of creating timing table 1 when order data j indicated by the contents of order register AP is in table M1, when AP=1, the process goes through steps 106 to 108, and
In step 135, j=AP of table M1
It is checked whether the contents of the SF (shift register) in the column of value 1 are H (shift instruction). No shift instructions (SF
= L) and the belt 15 is driven (BLT =
11) and set the data for normal image copying to CCN = 1112 in the timing table (
136M). When there is a shift instruction (SF=ll), the belt 15 is stopped (BLT=L) so as not to form an electrostatic latent image on the document up to the starting edge SYj of the masking area.
Data for not copying an image is set to CCN=1u in the timing table (No. 137). As a result of the above, the 15th data of timing table 1 has been written to the timing table.

Next, the processor 67 selects AP=j=14 in table M1.
Compare Yl and Yl of area data of 1i (138M
). This is to determine which of Yl and Yl is smaller (which should be referred to first in exposure scanning).

If Yl is smaller, set Yl to 'ltc139
Old, if Yl is smaller, set Yl (140M)
. Then, increase the contents of register CCN by 1 (14
1M), the data shown in the second column of the timing table 1 described above is set in CCN = 2g of the timing table (142M). As a result of the above, the data in the second column is set in the timing table.

Next, set CCN 1 larger (143M), and this time Yt
, set the larger of Yl and Yl to c (144M
146M), that is, the end position of the masking designated area in the scanning direction is set. Then, the same control data (third column of timing table 1) as in the case of normal image scanning is set in the CCN=3 column of the timing table (147M). Next, select [To specify the end of actual processing]
In step 122 of FIG. 10c, the CCN is updated to the one-person threshold, and after steps 123-124, step 147
At E, set g collection processing end data E=H in CCN=4a of the timing table.

The above is the process for setting the data of the timing table l.

When multiple masking areas and/or trimming areas are specified for the same purchase or multiple pages, processing data for one area is set in the timing table in steps 135M to 147M described above (CCN = 1 to 3).
), in step 123, the data reading 1lAr'=j of table M or T is updated to the next (larger value by 1), and there is also area specification data in the updated column, so the process proceeds from step 124 to step 125. , Check whether the area specification data in the updated column is for a separate location (1
25). If it is the same page, the process proceeds to steps 105-109, where one region's worth of processing data (fourth column, fifth column, and sixth!i) is written in the same manner as described above.

When it is placed separately, exposure scanning and latent image formation are stopped there, and the data (DCC) for document feeding (page change) is
= 11) in the timing table and (12
6), update the contents of page register PG to a number larger by 1, set Yjc to 0 to scan the document from the starting edge of the next page (127), and update CCN to a number larger by 1 (12).
8), and again executes the data setting process from step 109M onwards.

When the order data j indicated by the contents of the order register AP is in the table T, the trimming data setting process (135T to 147T) shown in FIG. 10d is executed instead of the masking data setting process (138M to 147M) described above. . This is the masking data setting process (138M
~147M). However, since this is a trimming process, the M/T data is inverted from that in the masking data process described above.

When the order data j indicated by the contents of the order register AP is in the table T and the masking specified area shown in Fig. 7f is specified for trimming (extraction), the data of the timing table created is as follows. Become.

Timing table 2 The first timing table is selected from the original shown in Fig. 13a and the original shown in Fig. 13b.
When obtaining the copy shown in Figure 4b, the above-mentioned table T4 is created according to the operator's input operations. The data of the timing table created based on the data of this table T4 is as shown below.

timing table 3 Next, with reference to FIGS. 10e and 10f, exposure.

The contents of development (103) will be explained.

When the M and T timing settings (102) are completed and the process proceeds to exposure and development (103), 1 (H) is set in register AIF to indicate that exposure and development have proceeded (148).
゜149). Then, belt mark detection (belt mark of belt 15 arrives directly under sensor 32 = belt 15
(150). When a belt mark is detected, set 1 (+1) to the belt mark detection register BMF.151
152) and waits for non-detection of the belt mark (passage of the belt mark) (150). When the mark is not detected, N
CR is set to H, the main charger 16 is turned on, and then, at the timing when the charging surface due to the charger 16 being turned on reaches just below the fiber unit 13, the resistor BMF is turned on.
is set to 0 (L), the belt 15 is stopped, and the charger 16 is turned off (154). and clears the belt timing counter BTC1 for tracking the exposure position on the belt for copying - sheets and the scanning timing counter STC for tracking the exposure scanning position,
And read timing table 'Ia (CCN)
1 to the timing event counter TEC for specification
(155). Next, the automatic document feeder 2 is driven to the scanning start position (the position where the right end of the document on the contact glass plate l is directly above the fiber unit 13) (156).

Next, the processor 67 calculates CCN=TEC of the timing table (for example, timing table 37 and below, the explanation will be given assuming that timing table 3 is set).
= I Read the data of II (157) and set the scanning drive (rightward movement) of the automatic document feeder 2 (15
8). That is, document scanning is started. Next, the STC count up (count of timing pulses generated by the sensor 66) is set (159). As a result, the scanning position of the document can be determined from the contents of the counter STC.

Next, the contents of counter STC and timing table 3
It is compared with Yjc=0 read out (160). When starting scanning the first page of the document, here STC=Y
t, c=O. Therefore, read data (10th (7) data M/T, XI, X of timing table 3)
2. D.R.B.

MCR, CIIT, BLT, DC5, DCC and EL
P) is set as an output (161). These data are
It only scans the document and does not form a latent image.
Since BLT=L, the belt 15 is stopped and the shutter 14 is on (blocking light).

Next, from the read data BLT, it is determined whether or not the belt 15 is driven (162), and if it is, the belt timing counter BTC is counted up (163).
), if the belt 15 is stopped, the counter 13TC is set to stop counting (164). Here TEC=CC
Since N=1 and BLT=L (belt stopped), BTC stops counting. Similarly, it is determined whether or not the device 2 is driven (165), and if it is, the scan timing counter STC is set to count up (166).
), if it is stopped, set the STC to stop counting (1
67), here TEC = CCN = 1 and DC5
= 11 (original scanning), so STC is counting up. Next, since DCC=L and E=L (no page break and editing continues) at this stage, steps 168 and 169 are passed and the next data 411 (second column) of timing table 3 is input. To specify, TE
Increase C by 1 (170), TEC= CCN=
2 data is read from table 3 (157). Then, the document scanning position STC is Ytc of the read data.
= E starting point (E = e = of the manuscript shown in Figure 13b)
Y address of the starting point in the document scanning direction of the E' area)
If it matches, the read data, that is, the 211th data of table 3, is set as output (161). Since the data in the second column is normal image exposure and static image formation, the belt 15 is driven, the shutter 14 is turned off (light transmission), and in steps 162, 163, 165, and 166, BTC is also collected in addition to STC. Set to count up. Next, in step 170, TEC is updated from 2 to 3. And T
Read the data of EC=CCN=3 from table 3 (157), src is Yt, c=E end point (13th
Waits for the Y address of the end point in the document scanning direction of the E=e=E' area of the document shown in FIG. b to match (160). If they match, the 39th data of table 3 is set to output (161), BTC and STC are set to up count (162-166), and TEC is updated from 3 to 4 (170). In addition, in the flow up to this point, step 13b
The electrostatic latent image of the image in the E-e-E' area of the document shown in the figure is spread from the image recording start point of the belt 15 to the E-e-E' area Y.
This means that it is formed over the width in the direction.

Next, read the data in the fourth column of table 3 (157)
.

Then, compare Ytc=0 in the fourth column with STC (1
60).

Here, the process advances from step 160 to 171, and then to step 172, where it is checked whether the DCC of the 4th aI is H (page break) (172). Since it is not a page break, STC (
(173) and drives the automatic document feeder 2 to the scanning start position (156). That is, while the original shown in FIG. 13b remains set on the contact glass plate 1, the apparatus 2 is returned to the exposure scanning start position. Then, data 4a of table 3 is read (1
57). Hereinafter, the output setting and count control based on the data in columns 4 to 6a are also the same as those described above based on the data in columns 1 to 3.

In the flow up to this point, on the belt 15, from the image recording start point, there is an electrostatic latent image of the image in the E-e-E' area of the original shown in FIG. This means that an electrostatic latent image of the image in the D-d-D' region of the original is formed. TEC=7.

Then, read out the bootara of TEC=CCN=7a in table 3 (157), Yjc=0, a little, DCC= )
l (page break instruction), so steps 160-172
-174 and set copy cycle stop (17
4). At this point, the exposure scan is stopped and the belt is stopped. The processor 67 then transmits a "next send" signal to the processor 80 (175). In response to this, a document feeding operation is started in the automatic document feeder 2 (thereby, the document on the contact glass plate 1 is ejected onto the contact glass plate 11). When the document is fed, the length of the document is detected during its feeding. When this supply is completed, processor 80 transmits the document length to 67. When there are no originals, a message indicating that there are no originals is sent. At steps 176 and 177, the processor 67 waits for this information, and upon receiving no original, the processor 67 waits for this information.
At step 7, the recording paper being supplied to the registration roller 21 is ejected, and a message indicating that there is no document is displayed on the operation board (178).

Now, when the manuscript length is received, TEC of table 3 =
Since the processing of the CCN = 7 column has been completed, update the TEC from 7 to 8 (189), clear the STC to set the scanning of the newly set original (1ao), and update the automatic document feeder. 2 is set as the exposure scanning start position (18). Then, the data in the eighth column of table 3 is read out (157), and similar to the image forming process based on the data in the first to third columns, the processing based on the data in the eighth to tenth columns is executed. In the flow up to this point, on the belt 15, there is an electrostatic latent image of the image of the E-e-E' area of the original shown in FIG. D-d-D' of the manuscript
The electrostatic latent image of the image of the region and also the thirteenth
An electrostatic latent image of the image in the A-a-A' area of the original shown in Figure a is formed.

TEC=L1. At this time, the content of BTC indicates the distance that the image forming start end of the photoreceptor belt 15 has moved to the right from the fiber unit 13, that is, the value corresponding to the horizontal length of the copy shown in FIG. 14b.

When the data in the 11th column of table 3 is read out with TEC=11 (157), since Ytc=SYL, the 10th a
The same data as the data of is set to the output (161), but since E=y, from step 169, step 1
The process advances to step 81, where data for stopping exposure and development processing is set as output. Then, the process proceeds to the next transfer (104).

Note that in the above description, description of output control regarding leading edge erase, site erase, and trailing edge erase is omitted. These processes are similar to the conventional erase process during normal copying.

Furthermore, as shown in FIG. 1, since the exposure position (the position of the fiber unit 13) and the erase position ra<the position of the eraser 13) are different from each other, from the setting of data indicating the erase area, the eraser position based on that data is The energization control of
A delay corresponding to the deviation is required, and the eraser energization control is performed by taking this delay. Illustration of this control flow is omitted.

Next, transfer (104) will be explained. Here is a supplementary explanation of the hardware configuration that is the premise. Referring to FIG. 1, in this embodiment, the length LD of the photoreceptor belt 15 from just below the fiber unit 13 through the roller 45 to just above the transfer separation charger 23 of the roller 46 section is [maximum recording size]. Horizontal (from TSYs to TSYL in Figure 7f)
(length from the registration roller 21 to just above the transfer separation charger 23)]+[recording paper path length sd from the registration roller 21 to just above the transfer separation charger 23). That is, the belt 15 is relatively long so that an electrostatic latent image of maximum size can be formed in the belt length LD from the exposure section to the transfer section.

When the process proceeds to transfer (104), the belt 15 is first rotated clockwise (112), and along with this, the belt timing counter BTC is counted up. The BTC count data indicates the amount of advance of the image forming start end of the belt 15 from the fiber unit 13. Therefore, BTCtt
Wait for LD-sd (182), that is,
Wait until the image formation starting edge reaches the sd front side of the transfer position. When the transfer point is reached, the clutch 54 is turned on to start feeding the recording paper from the registration rollers 21 toward the transfer section (183). Then wait for BTC to become LD (
184), that is, it waits for the image formation start end to arrive directly above the transfer separation charger 23.

When BTC becomes LD, the transfer separation charger 23 is turned on (185). As a result, the image toner on the belt 15 is transferred to the recording paper that is attracted to the belt 15 and passes through the charger 23, and the recording paper leaves the belt 15 and heads toward the conveyance unit 24. Here, BTC is L
Wait until the recording paper length reaches D10 (186). That is, it waits for the recording paper to pass through the transfer section. When the RTC reaches the LD tenth record length, the process proceeds to step 95 shown in FIG. 10a.
Set post-processing.

Through the control operations of the microprocessors 80 and 67 described above, various editing copies can be performed. Several examples of input operations for executing typical basic aspects of editing copy are shown below. Note that by combining these basic aspects in various ways, copies of various combinations of image areas within five of one or more original documents can be obtained.

(1) Press the masking copy edit key 63E to turn on the edit key indicator light, set a sheet of original on the document table 4, and mark the X corresponding to the diagonal corner of the area to be masked on the document on the document table 4. When the axis address input switch and the Y-axis address input switch are turned on, the masking instruction switch 57 is turned on, and the copy start key 59P is pressed, the copy shown in FIG. 7f is obtained.

(2) Masking alignment copy In addition to the input operation in (1) above, the alignment instruction switch 59
When you press the copy start key after turning on the
A copy of FIG. 7f starting at TSYj is obtained.

(3) Trimming copy When an area is specified as in (1) above and the trimming instruction switch 57 is turned on instead of the masking instruction switch 57, the image of the diagonally shaded area indicated as the masking specified area in Fig. 7f is extracted. However, a copy with other parts of the image erased is obtained.

(4) Trimming and Aligning Copy In addition to the input operation for executing (3) above, when you turn on the aligning instruction switch 59 and then press the copy start key, the image played back in (3) above is recorded. A copy with a shape shifted to the leading edge of the paper is obtained.

(5) Composite copy of multiple originals by one transfer From the originals shown in Figures 13a and 13b,
Obtain the copy shown in the figure (input operations, etc. were explained in the description of the embodiment above).

(6) Short copy of one original image A copy shown in FIG. 12a is obtained from the original shown in FIG. 11 (as explained in the description of the embodiment).

(7) Repeated copying of crop harvesting image A copy shown in FIG. 12b is obtained from draft g shown in FIG. 11 (as explained in the description of the embodiment).

(8) Replacement of images in -sheets of original A copy shown in FIG. 12c is obtained from the original shown in FIG. 11 (as explained in the description of the embodiment).

(9) Composite copying of multiple originals using the manual feed tray 37 paper feed Insert the copy obtained in the above (1) into the manual feed tray 37.

If you place another original on the document table 4 and instruct it to copy by specifying the same area as specified in (1) above in the same way as in (3) above, the image of one of the two originals will be A composite copy is obtained by erasing the original image and copying the image of another document into the erased portion.

The main features of the above embodiment are summarized below.

A) When the image scanning of - sheets of originals is completed, the photoreceptor belt 15 is stopped, and after the next original is set at the reading position, the photoreceptor belt 15 is driven. The exposure scanning means (in the above embodiment, the automatic document feeder 2, that is, the document table) returns when the photoreceptor belt 15 is stopped. Therefore, when editing the images of a plurality of documents and making one copy, the photoreceptor belt 15 is stopped multiple times.

B) After completing the exposure and electrostatic latent image formation for one copy screen, transfer the one screen. During the exposure and electrostatic latent image formation, the electrostatic latent image that has reached the developing roller of the developing device 17 is developed, and after the electrostatic latent image has not reached the developing roller during the exposure for one screen and the electrostatic latent image formation. The portion is developed during driving of the belt 15 for transfer.

C) If the recording paper is stopped at the transfer section, it may cause partial shading in the copied image or paper jam, so
To prevent this, during exposure and formation of an electrostatic latent image for one editing copy screen, the leading edge of the electrostatic latent image does not reach the transfer section, that is, the transfer is carried out continuously on the photoreceptor belt 15. The length LD of the image forming surface of the photoreceptor belt 15 from the exposure position (fiber unit 13) to the transfer position (charger 23) is set at a maximum so that the image forming surface of the photoreceptor belt 15 is formed on one sheet of recording paper at once for the screen by driving. Recording paper size (SY5”
SYL: Set above (Figure 7f).

In the above embodiment, the belt 15 is continuously driven during transfer, and the LD is set to the maximum recording paper so that when the image recording start edge of the belt 15 reaches the transfer separation charger 23, the leading edge of the recording paper also reaches there. Size + sd (roller 21
The path length for sending the recording paper from the charger 23 to the charger 23).

In order to make the length equivalent to sd shorter than this length, the belt 15
When the starting edge of image formation is within the range in front of the transfer separation layer charger 23, the registration roller 21 is driven first, and the belt 15 is driven after the leading edge of the recording paper advances to a position corresponding to the starting edge of the image formation. Performs control to start.

D) When replacing the document or returning to the exposure scanning position, the belt 15 is stopped, and while the belt 15 is stopped, the illumination lamp 12 is turned off so that no light enters the photoreceptor belt 15. In addition, the shutter 14
Turn on (shading).

Note that since the shutter 14 is provided, the illumination light 12 may be kept on in order to simplify the on/off control of the illumination light 12, or the illumination light may be controlled to turn off in order to simplify the hardware. The shutter may be omitted. However, in order to prevent blurring in the border area of the edited image,
It is preferable to provide a shutter, and in order to prevent heat generation in the exposure slit portion and to completely block light, it is preferable to control the illumination lamp to be turned off. Note that in this embodiment, the shutter 14 is

It has significance as a print head for writing characters and other images. Although a detailed explanation has been omitted, the photoreceptor is Character 9 images and the like are recorded in lines on the belt (pixel writing is performed by blocking light in units of divided electrodes by the shutter 14).

E) Turn off the main charger while the photoreceptor belt 15 is stopped. Further, the transfer separation charger 23 is also turned off except when driving the belt 15 for transfer. These are to prevent white streaks and blurring from occurring at the joints between images during editing copying, and to prevent deterioration of the photosensitive surface of the photosensitive belt 15.

Note that in order to prevent uneven development density, the photoreceptor belt 1
5. During the stop, the developing bias is also turned off.

F) Rotating slit plate 65 connected to main motor 47
The photo sensor 66 generates a timing pulse. This timing pulse is used as a scan synchronization pulse when the automatic document feeder 2 is being driven for scanning, and is used as a belt synchronization pulse when the belt 15 is being driven. In other words, during exposure scanning,
A timing pulse is counted up by a counter STC from the start of scanning, and this count value is compared with area boundary data of a single image extraction area or erasure area, and when they match, area extraction or area erasure is controlled.

Timing pulses are counted up by the counter BTC from the time when exposure to the belt 15 is started, and while the belt 15 is stopped for changing the original or scanning return, the count amplifier of the counter BTC is stopped, and the exposure is started again. When the belt 15 is driven, the counter BTC continues counting up from the previous count value.

Therefore, the count value of the counter BTC indicates the advancing position of the starting end of the image recording area on the belt 15 with the exposure position (position of the fiber unit 13) as the base point.

Copy - Counter BT when exposure for a screen is completed
The count value of C also indicates the recording screen size (Y direction). During transfer, this count value is referenced to determine the paper feeding start timing of the registration roller 21 and the turning on of the transfer separation charger 23.

Set the off timing.

In the above embodiment, a self-off (light converging) fiber lens (
13), it is possible to record only the same size in the X direction. Furthermore, the image cannot be moved in the X direction. When performing magnification recording in the X direction and/or image movement in the X direction, a general projection lens is used. The magnification is set by the amount of movement of this projection lens in the direction along the optical axis, and the amount of movement of the image in the X direction is set by the amount of displacement in the X direction. For details, see, for example, Japanese Patent Application No. 60-0168 filed by the applicant.
It was disclosed in No. 58.

(2) Effects As explained above, in the present invention, the mechanical system is set so that the original exposure scanning system and the photoreceptor drive system can be selectively synchronously operated and operated separately.

Since the drive of the photoreceptor is stopped until the exposure scan reaches the specified area, and the photoreceptor is driven when the exposure scan reaches the specified area, only the specified area of each document is exposed to the photoreceptor, and therefore the photoreceptor is One edited copy can be obtained by sequentially forming designated areas on the document in one copy image forming area of the body, and then transferring all at once after completing this.

In other words, a copy (first copy) in which a part of one original (for example, Fig. 11) is erased and the remaining image is placed to fill in the erased part.
2a), repeat copying in which only one part of the original is repeatedly copied on the same sheet of paper (Fig. 12b), repositioning copying in which each part of the image on one original is replaced (Fig. 12c), etc. In composite copying (Figs. 14a and 14b) that combines parts of the above manuscripts (for example, Figs. 13a and 13b), desired editing can be performed in one transfer operation onto one recording sheet. You can get a copy of it. Since the number of copy cycles to be executed is reduced and image editing is performed on one copy image forming area of the photoreceptor, image shift is reduced and the number of operations performed by the operator for editing copying is also reduced.

In addition, in the present invention, while the photoreceptor is being driven, timing pulses are counted starting from when the image forming start end of the photoreceptor is at a predetermined position, the start end position is tracked by the count value, and the count value is Based on this, the relative timings of sheet feeding and photoreceptor feeding are determined in order to synchronously align the starting edge and the leading edge of the sheet in the transfer section. This allows the editing image to be aligned with the sheet easily and accurately in the transfer section.

[Brief explanation of drawings]

FIG. 1 is a side view showing the configuration of a mechanical structure according to an embodiment of the present invention. FIG. 2 is a side view schematically showing a power transmission system that drives the mechanism shown in FIG. 1. FIG. 3 is an enlarged plan view of the original stage 4 shown in FIG. 1. FIG. 4 is an enlarged plan view showing a part of the operation board included in the copying machine shown in FIG. 1. FIG. 5 is a block diagram showing the configuration of an electric control device provided in the copying machine main body 22 shown in FIG. FIG. 6 is a block diagram showing the configuration of an electric control device included in the automatic document feeder 2 shown in FIG. 1. 7a is an enlarged plan view of the eraser 14 shown in FIG. 1, FIG. 7b is an enlarged side view, FIG. 7c is a block diagram showing the configuration of an electric device for energizing the eraser 14, and FIG.
FIG. 7c is a block diagram showing the electric circuit configuration of the integrated circuit ICI, and FIG. 7e is a time chart showing input/output signals of the integrated circuit ICI. Figure 7f shows masking (erasing) one area of one document.
FIG. 4 is a plan view showing an erase area (hatched) when obtaining an edited copy to be edited; the vertical direction shows the erase width, and the horizontal direction shows the erase width setting timing. FIG. 8 is a block diagram showing the configuration of an electric device that energizes the shutter 14 shown in FIG. 1. Figures 9a, 9b, 9c, 9d and 9c
6 is a flowchart showing the control operation of the microprocessor 80 shown in FIG. 10a, 10b, 10c, 10d, 10e, 10f and 10g. 6 is a flowchart showing the control operation of the microprocessor 67 shown in FIG. 5. FIG. FIG. 11, FIG. 13a, and FIG. 13b are plan views showing the original. Figures 12a, 12b and 12c respectively show
FIG. 12 is a plan view showing an edited copy of the original shown in FIG. 11; Figures 14a and 14b are plan views of edited copies of the manuscript shown in Figures 12a and 12b, respectively.

Claims (7)

[Claims] (1) Photoreceptor; Photoreceptor driving means for rotationally driving the photoreceptor; Timing pulse generation means for generating an electric pulse at a rate of one pulse per movement of the photoreceptor over a predetermined short distance; Detection means for detecting that the photoreceptor is in a predetermined position; Charging means for charging the surface of the photoreceptor; Exposure scanning means for scanning and projecting the image of the document onto the charged surface of the photoreceptor; Scanning drive means for urging exposure scanning; partial area erasing means for partially changing the charge on the surface of the photoreceptor to a non-developing level; erasing energizing means for energizing the partial area erasing means; developing the exposed surface of the photoreceptor to form a head image on the surface of the photoreceptor; Developing means for generating; Transfer means for transferring the developed image on the surface of the photoreceptor onto a sheet; Sheet supply means for supplying the sheet to the transfer means; Input means for specifying the image editing area on the document and editing processing; By input means Reading means for reading the area and editing process designation; Instructs the scan drive unit to perform document exposure scanning according to the area designation and editing process designation, sets the erase biasing unit to partially erase the designated area, and sets the exposure scan to the designated area. an image forming control means that stops driving the photoreceptor until reaching a specified area, and instructs the photoreceptor driving means to drive the photoreceptor when the exposure scan reaches a designated area;
While driving the photoreceptor, the electric pulses are counted based on the detection of the presence of a predetermined position of the image formation start edge, and when the photoreceptor stops, the counting is stopped, and the count value is determined by the transfer of the image formation start edge of the photoreceptor. A timing control means for feeding at least one of the sheet feeding means and the photoreceptor at the timing when the leading edge of the sheet reaches the transfer means when the value indicating the arrival at the means is reached; Shape editing copying device. (2) The document according to claim 1, wherein the exposure scanning means includes an illumination light that illuminates the document, and the image forming means turns off the illumination light while stopping the driving of the photoreceptor. Image projection/transfer type editing/copying device. (3) The exposure scanning means includes a shutter that opens and closes the exposure optical path from the original to the surface of the photoreceptor, and the image forming means uses the shutter to block light while the drive of the photoreceptor is stopped. The original image projection/transfer editing/copying device described in (1) above. (4) The exposure scanning means includes an illumination lamp that illuminates the document and a shutter that opens and closes the exposure optical path from the document to the surface of the photoreceptor, and the image forming means turns off the illumination light while stopping the drive of the photoreceptor. Claim No. 1 (2008) in which the shutter is used to block light.
1) The original image projection transfer type editing/copying device described in item 1). (5) The image forming means stops driving the photoreceptor even during the exposure scan return during editing and recording of one copy screen. An original image projection/transfer type editing/copying device as described in item 3) or item (4). (6) The image forming means stops driving the photoreceptor even during document change during editing and recording of one copy screen. ) or paragraph (
4) Editing and copying device for projecting and transferring original images. (7) The length of both image forming surfaces of the photoreceptor between the exposure position by the exposure scanning means and the transfer position by the transfer means is equal to or longer than the maximum length of a sheet to be used for copying. An original image projection/transfer type editing/copying device as described in item (1), item (2), item (3), or item (4).