JPS6235380A - Copying device - Google Patents

Abstract

PURPOSE:To transfer plural original pictures on the same transfer paper without superimposing by exposing the 1st and 2nd original pictures and forming plural original images on different parts on the same paper. CONSTITUTION:An original 10 set to a RDF 9 is conveyed and set at the original picture reference position on an original glass 21, thereby completing a transfer action. Then the original 10 on an original platen 12 is again conveyed to an original platen through the switch back of paths D-F of the RDF 9. The original is moved by a size A4 so as to set, and a transfer action is executed. Namely, after a picture tip detection sensor 30 detects a number 29 fitted on a moving optical system unit 45, an erasure lamp lights up in a preset time T2 (A4 size width), whereby an unnecessary potential caused by the scan of the optical system is erased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] Unissued IJI relates to a copying machine having an image composition function.

[Prior art]

Conventionally, this type of copying device has been designed primarily to superimpose multiple originals, and has typically achieved multiple copies by controlling the leading edge of the transfer material and the leading edge of the original to be synchronized. Ta. Furthermore, when compositing a plurality of originals so as not to overlap them on the same transfer material, the operator must set the originals in such a way as to prevent overlapping, which is extremely difficult to set up.

[verbal]

The present invention has been made in view of the above points, and an object of the present invention is to provide a copying apparatus capable of copying a plurality of original images onto the same transfer sheet without overlapping them.

A further object of the present invention is to provide a copying apparatus capable of copying a plurality of original images to arbitrary positions on the same transfer sheet.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

DESCRIPTION OF THE MAIN BODY FIG. 1 is a cross-sectional view showing an embodiment of a double-sided copying machine to which the present invention is applied, in which an RDF 9 (automatic document feeder) and a sorter 39 are attached. There is also a device in which a pressure plate 90 is set in place of the RDF 9, and in each of these configuration diagrams, the surface of the drum 1 is made of a seamless photoreceptor using ASI, and is rotatably supported. When the power is turned on by the power switch 2, the fixing device 3 is heated.

When the predetermined temperature is reached, the main motor 4 turns the drum l,
The conveyance units A, B, and C and the fixing roller 5 start rotating in the direction of the arrow. When the temperature reaches a predetermined fixing temperature, a potential control process (pre-processing) and a developing device 6.
After determining whether or not there is toner in the printer 7, the main motor 4 stops and enters a standby state to wait for a copy start signal, which is an expected state.

First, the copying mode that can be performed by the copying machine of the present invention will be briefly explained, and then the copying process will be sequentially explained. Copying modes include one-sided copying mode, in which an image is formed on one side of the transfer paper and then ejected, two-sided copying mode, in which images are formed on both sides of the transfer paper and then ejected, and multiplex, in which multiple images are combined on one side of the transfer paper and then ejected. It can operate in copy mode, and in double-sided copy mode and single-sided copy mode, the intermediate tray 8 is used for copying.

Furthermore, by having a plurality of developing devices 6.7, it is possible to copy onto transfer paper in a plurality of colors. In addition, by detecting the document size, AMS (automatic scaling) is possible.

It has an APS (automatic cassette selection) function and is equipped with a zoom function, etc.

(Double-sided copy mode) First, the process of obtaining a double-sided copy from a double-sided original will be explained. RI) After setting the original 10 on the F9, enter the key to make double-sided copies from the double-sided original on the operation unit 11, which will be described later. Next, set the number of copies, specify the black developer 6 among the developers, and then copy. Enter the start key. R.D.
The original lO set at F9 is conveyed onto the original glass 12. In addition, in the main body, the illumination lamp 14, which is integrated with the first scanning mirror 13, is set at the reference position 92,
It performs potential control (described later) and controls the input light of the document detection CCD (details will be described later).

Next, the original lO is illuminated by an illumination lamp 14 that is integrated with the first scanning mirror 13, and the reflected light is scanned by the first scanning mirror 13 and the second scanning mirror 15. The first scanning mirror 13 and the second scanning mirror 15 are 1:
By moving at a speed ratio of 1/2, the original is scanned while keeping the optical path length in front of the projection lens 16 and the original detection lens 17 constant.

In this way, the above-mentioned reflected light image is formed on the detection element CeD 1B through the document detection lens 17, and also passes through the projection lens 16, the third mirror 19, and the fourth mirror 20, and is imaged on the drum.

On the other hand, the drum 1 is exposed to the pre-exposure lamp 21 with a purple pattern ＾Buddha 1 spider Φ 01 play 4. The image is then irradiated by the illumination lamp 14 and illuminated with slit i light to form an electrostatic latent image. During the original size detection scan, the latent image is erased by the eraser lamp 23, and the AC component of the developer bias is set to 0.
It applies a bias to prevent toner from adhering to the FFI and DC components, and inputs the reflected light on the front document glass 91 as document information to the document size detection element CC018. The reflected light of the part is configured to be very low, and the CC
The D processing will be described later.
After the processing is completed, scanning is performed for copying, and after obtaining the electrostatic latent image as described above, it is visualized by the designated developer 6 or 7, and then transferred to the manual feed cassette 24 and the upper cassette 25.
, the transfer paper in the lower cassette 26 or the deck 27 is fed from a designated paper feed port by the paper feed rollers 50, 51, or 52, and is conveyed to the front of the registration rollers 28. The member 29 attached to the illumination lamp 14 (hereinafter referred to as a moving optical system) unit that is integrated with the first scanning mirror 13 is detected by the document leading edge position (image leading edge) detection sensor 30 and then fixed. time T
Then, the registration roller 28 is driven, and the transfer paper is sent toward the photosensitive drum 1 with accurate timing so that the leading edge of the latent image and the leading edge of the transfer paper coincide. Thereafter, the transfer paper passes between the transfer charger 31 and the drum 1, so that the toner image on the drum 1 is transferred to the transfer paper, and after the transfer is completed, it is separated from the drum 1 by the one-separation charger 32.

Thereafter, the surface of the photoreceptor drum 1 is cleaned by a cleaning device 33.
It is cleaned by the pre-exposure lamp 21, and the potential unevenness is evened out by the pre-exposure lamp 21, so that it can be used repeatedly.

The paper bus path is switched and controlled so that the transfer paper separated from the photosensitive drum 1 is guided to the fixing device 3 by the transport unit (A), fixed, and then transported to the duplex unit 35 by the flapper 34. The transfer paper is transferred to the transport section (B
), (C), switch back, and are stored in the intermediate tray 8. When the exposure operation for the set number of sheets is completed, the original platen 1
2 to the original to' on the RflF bus (D).

The switchback is performed by steps (E) and (F), and the document 10' is again set on the document table 12 so that the back side thereof is copied. After the setting is completed, the transfer paper fed from the intermediate tray 8 by the paper feed roller 37 is transferred to the conveyance path CG)
The document is conveyed to the front of the registration rollers 28, and after a predetermined time T1, the member 29 to which the moving optical system unit is attached is detected by the document edge position (image edge) detection sensor 30, and then the registration rollers 28 are moved. drive,
The latent image is sent toward the photosensitive drum l with precise timing so that the leading edge of the latent image and the leading edge of the transfer paper coincide. after that,
When the transfer paper passes between the transfer charger 31 and the drum 1, the toner image on the drum 1 is transferred, and after the transfer is completed, it is separated from the drum 1 by the separation charger 32. The surface of the photosensitive drum 1 is cleaned by the cleaning device 33, and unevenness in potential is evened out by the pre-exposure lamp 21, so that it can be used repeatedly.

Further, the transfer paper separated from the photosensitive drum 1 is guided to the fixing device 3 by the transport unit (A) and fixed thereon, and then is discharged by the flapper 34 through the paper discharge roller 8 to the sorter 39. The copying operation is completed by performing this operation for the set number of copies. Further, the original 10' on the original table glass 12 is transferred to the original tray 4 via the paper bus path (D).
0.

It is also possible to perform double-sided copying from a single-sided original - in this case, the original 10 set in the RDF 9 is transferred to the paper bus path (H
) and set on the original glass 12, the exposure operation for the set number of sheets is performed, and the transfer paper is transferred to the intermediate tray 8 as described above.
will be stored in. When the exposure operation for the set number of sheets is completed, the original 10' is discharged onto the original tray 40 via the paper bus path (:D). Further, in parallel with this original ejection operation, the next original is fed and set on the original glass 12.

Then, an exposure operation is performed on this document, and the intermediate tray 8
A copy is made on the other side of the transfer paper for single-sided copying stored in the paper, and the paper is discharged to the sorter 39. Further, when the exposure operation for the set number of sheets is completed, the originals are discharged onto the original tray 40 via the paper bus path (D). This operation is repeated until the original has been circulated once.

(Multiple Copying Mode) Next, the basic process of multiple copying and the movement of the transfer material will be explained. After setting the original on the RDF9, specify the multiple copy mode using the keys in the operation panel ll described later, then set the number of copies, select the developer to be used from among the multiple developers, and specify the developer. After doing so, enter the copy start key. As a result, the original 10 set on the RDF 9 is conveyed to the exposure position on the original glass 12. Then, a toner image is formed on the photosensitive drum 1 as in the double-sided copying mode, and this toner image is transferred onto the transfer paper. Then, the paper bus path is switched and controlled so that the transfer paper separated from the photoreceptor drum (2) is guided to the fixing device 3 by the transport unit (A) and fixed thereon, and then transported to the multiplex (double-sided) unit by the flapper 34. Ru. As a result, the transfer paper passes through the conveying section (E) to the switching device 4.
1 and stored in the intermediate tray 8. Repeat this operation for the set number of copies to complete the copying operation.
After ejecting the original 10' to the original tray through the RDF path (H), take out the next original from the RDF 9, and set the original on the original table 12 as described above.
In order to copy on the same side of the transfer paper, the transfer paper fed from the intermediate tray 8 by the paper feed roller 37 is transferred to the conveyance path (G
) is conveyed to the front of the registration roller 28, and a copying operation is performed in the same manner as in the case of back-side copying in double-sided copying mode.The transfer paper separated from the photosensitive drum l is guided to the fixing device 3 by the conveyance unit A) and is fixed. After that, the paper is discharged by the flapper 34 through the paper discharge roller 38 to the sorter. This operation is repeated for a set number of copies to complete the copying operation.

Further, the original on the original glass 12 is discharged to the original tray 40 via the paper path path (H).

Next, the page continuous shooting mode will be explained.

After setting the original on the RDF 9, use the operation section 11 (to be described later) to manually press the key to perform quick copying. Next, set the number of copies. In this embodiment, there is a mode for specifying the developing device to be used among the developing devices. and a mode in which the color of one side of the snapshot and the color of the second side are automatically determined in advance.

In the following explanation, the document size is A3, the magnification is 1x, APS (automatic cassette selection) is selected, and the developing devices for the - side and the second side are decided (black for the first side, black for the second side, This section explains the operation of the red side) mode. - The original copy size is set to A4 size and is 1/2 of the original A3) The original fed to the exposure position by the RDF 9 as described above is scanned by the first scanning mirror and the illumination lamp 14, and the electrostatic After the image is obtained, it is visualized by a predetermined black developing device, and the paper size sensor 42.43.4 is attached to the upper and lower cassettes or decks.
Select the paper feed slot in which A4 size transfer paper is set according to the 4 groups 0 For example, A3 size transfer paper is set in the upper cassette 25, A4 size transfer paper is set in the lower cassette 26, and B4 size transfer paper is set in the deck 27. If so, the A4 size paper is fed from the paper feed port of the lower cassette 26 by the paper feed roller, is conveyed to the front of the registration roller 28, and is moved to the member attached to the moving optical system unit. After a predetermined time Tl after detection by the image tip sensor 30, the registration roller 2B
The latent image is driven toward the photosensitive drum 1 with accurate timing, and the leading edge of the latent image is aligned with the leading edge of the transfer paper.

Thereafter, as described above, the paper goes through a transfer process, a fixing process via a conveyance system, is discharged, and copying is completed, and then copying of the second side is started. The moving optical system is controlled so that it automatically returns to the optical system reference position 15 (home position) when the second exposure scan is completed, and copying for the second side is started from the reference position 15. After the start and the member 29 attached to the moving optical system unit 45 is detected by the image tip detection sensor 30.

The eraser lamp is turned on for a predetermined time T2 (width of A4 size) to erase the latent image on the - side and the potential on the 6 essential areas to obtain the latent image on the second side. is visualized by a predetermined red developing device (color developing device), and the paper is fed by a paper feed roller from the paper feed port of the lower cassette 26 into which the A4 size is pushed and is transported to the front of the registration roller 28. Then, after a predetermined time T3, the registration roller 28 is driven, and the latent image is sent in the direction of the photosensitive drum 1 with accurate timing, so that the leading edge of the latent image and the leading edge of the transfer paper are aligned. Thereafter, as described above, the image is discharged through a transfer process, a fixing process via a conveyance system, and copying is completed. In addition, as mentioned above, combinations of duplex copying and multiple developing units, combinations of duplex copying and quick copy mode, combinations of multiple copying and multiple developing units, combinations of multiple copying and continuous copying mode, etc. can be specified on the operation panel described later. It is configured. Another function is to vary the process speed (circumferential speed of the photosensitive drum l) when there is insufficient light irradiated to the photosensitive drum l. When the write function is selected, the process speed is automatically reduced.

In addition, as an additional function, in order to erase any part of the latent image on the photosensitive drum 1, after image exposure and before development, an eraser lamp with a large number of finely divided printing elements is arranged, and the printing part The system is configured so that any latent image can be erased by controlling the light-emitting elements of the system, and functions to combine the aforementioned multiple copies and the colors of multiple developers to synthesize images. .

In addition, in order to make the process speed variable as described above, this embodiment uses the DC motor MI4 as the drive source, which will be explained using FIG. is input to the PLL 81 as a reference, and a speed signal from an encoder 82 connected to the DC motor MI4 is fed back, and the output of the PLL 81 is sent through an amplifier 83 so that the reference signal and the feedback signal are synchronized. The DC motor 4 is driven by a driver 84, and when changing the speed, it is controlled by input signals A and H to change the output frequency of the oscillator 80, and the signals A and B are not shown. It is connected to the speed command circuit.

Operation timing Figure 3 shows the timing chart of the entire machine.
Figures to Figure 8 are forward rotation degrees and potential control.

A timing chart of CCD dimming, CCD measurement, null scan, and post-rotation is shown. In FIG. 3, after the power is turned on, the fixing heater is turned on, the scanner is returned to the home position, and the lens performs initialization movement.
Pre-rotation potential control is performed after the fixing temperature reaches 185°C.

After the CCD dimming and post-rotation are performed and the fixing temperature reaches 195°C, the standby state is entered and copy key reception becomes possible. After the copy key is turned on, the pre-rotation potential is controlled, and in preparation for the CCD measurement scan, the lens moves to a position where the second mirror does not collide during a full scan. The document size and document density are detected. Thereafter, the lens is moved according to the magnification or specified magnification by AMS calculation. After scanning the set number of sheets and reversing the last one, it will start the post-rotation.

Figure 4 is a timing chart for pre-rotation, in which pre-exposure, blank exposure, and post-exposure are ONI in synchronization with the main motor, and from pre-exposure to sequentially turn on primary, pot, and transfer 1-separate charging. The drum rotates to the forward rotation end.

During a copy operation, the specified developer is driven in synchronization with the main motor, and when it passes the potential sensor position from pre-exposure, the developing bias is set to the sensor output potential +2.
Enters 00V control. At this time, the other developing device is in a floating state.

FIG. 5 is a timing chart of potential control. At the start of potential control, the blank is turned off to form a dark potential on the drum. The drum potential is measured by a potential sensor, and the primary charging current is varied so that the dark potential approaches the target potential of 450 cm. This is called vD open control, and the amount of light from the illumination lamp is controlled using the 0th order, which is performed four times, and the primary current obtained by vD. Turn on the lamp to create a bright potential on the drum. The drum potential is measured by a potential sensor, and the bright potential approaches the target potential of 50V.
Controls the light intensity of the lighting lamp. This is called VL1 control, and the bright potential is measured again using the light intensity obtained in @VLI performed three times, and this potential is called VL2, which is used to determine the developing bias]:1C.

After the VL2 measurement is completed, potential control is completed.

FIG. 6 is a timing chart for CCD dimming and CCD measurement. In CCD dimming, the illumination lamp is controlled to have a light intensity suitable for CCD measurement. The scanner is in the home position, exposing the standard white plate,
The amount of reflected light is measured by the CCD, and the amount of light is controlled so that the maximum value on the - line is at a predetermined level. After this control is completed, the optical system performs a full scan and determines the size and density position of the document. Detect. At this time, when it is detected that there is no document, the threshold level and lamp light intensity are changed and scanning is performed again.

FIG. 7 is a timing chart of copy scanning. The optical system starts moving forward, and from the position where the image tip is detected, the developing bias DC becomes VLZ170v, and the developing bias AC is also turned on. Further, desired blank lighting control is performed from the tip of the image at a predetermined timing.

FIG. 8 is a timing chart of post-rotation. After the final reversal of scanning, rotation begins, and sequentially from primary charging to developing device and developing bias DC.

Developing/< Ia 7. A C is off, cent + 2
00V.

0FFL, post charging, transfer charging 2 separation charging is OF
F. After one rotation of the drum from the primary charging OFF, the developing bias DC becomes Ov.

The main motor after the last paper has been ejected.

Blank exposure, post-exposure, and pre-exposure are turned off and the system enters standby mode.

Operation system FIG. 9-1 is a perspective view of a copying apparatus according to the present invention,
Reference numeral 251 is a document placing glass, and a touch panel using transparent electrodes is provided on the glass surface.
By pressing the pressing pen on the document placement glass 251, the coordinates of the specified position can be detected.

Note that the principle of the touch panel will be omitted here. Of course, even when an image is formed by exposing a document, since a transparent electrode is used, the latent image formed on the photoreceptor is not affected. 253 is a switch provided on the pen,
the switch.

Coordinate input can only be performed when is pressed.

254 is a document placement glass 251 along the X direction and the Y direction.
It is an LED array installed on the edge of the main unit, and can be turned on and off at will based on instructions from the main unit's CPU. 255
1 is an operating section which controls control input/output commands to the copying apparatus.

FIG. 10 is a top view of the operating unit.

The function of each key will be explained step by step.

100aNc are each a function key,
It can be set arbitrarily using each key on the operation unit. This is a copy mode storage and recall key, and can store up to 5 types of modes. In other words, it is possible to memorize the mode that the user uses on a daily basis, the unique magnification used by each user, or the specified area, etc., and instantly change the settings by pressing one key. In a copying machine that can set a desired copy mode, the memory is always maintained by a backup power source.

101 N110 is a numeric keypad, and in addition to the normal sheet number setting function, it also has the function of inputting various data in various asterisk modes in combination with the asterisk key.

Reference numeral 111 is a clear key for clearing the set number of sheets or data, and reference numeral 112 is a reset key for returning the set mode to a predetermined standard mode, returning to the normal copy mode.

113 is a preheating key, and 114 is an asterisk key for shifting to various asterisk modes. 115 is a copy stop key, 116 is a color key for selecting a plurality of developing devices built into the main unit, and when a color developing device is selected, a built-in LED 150 lights up, including as a warning. .

151 is a copy start key, and the LED is green when copying is possible (excluding copying), and red otherwise.
(151) is lit and displayed. 119 is the AE key,
An AE mode is selected in which a copy with an appropriate density can be obtained by detecting the original density and correcting the developing bias. Note that when the AE mode is selected, the display 152 lights up. Reference numerals 118 and 120 are manual density adjustment keys, and the density level can be increased or decreased using the keys 118 and 120 to obtain a desired density. Note that if the key 118 is pressed, the density becomes high<(W<), and if the key 120 is pressed, the density becomes low (light), and the density ratio on the display 153 changes accordingly. 152 and 153 are display groups indicating the above density conditions. 154 is a 7-segment display that displays the number of copies.

Reference numeral 121 is a cassette selection key, which is used when manually selecting a cassette stage.
) has the function.

155 is a display group indicating the stage selected by the cassette selection key 121 or the APS mode. 122 is a fixed enlargement ratio selection key, 123 is a fixed reduction ratio selection key, and 124 is an automatic magnification selection key. (', Au
to Magnifica-ti on Se
1ect:AMS) key.

AMS has a function that automatically selects the appropriate magnification based on the detected original size and selected cassette size.
If the mode is selected, indicator 158 lights up.

125 is a zoom key, which allows the magnification to be adjusted in 1% increments using the 10 key and the - key. 126 is an equalization key, which sets the copy magnification to the same size (100%). Note that the display 157 lights up in the same-size mode. 156 is a dot matrix type fluorescent display tube, which normally has a set copying magnification of 9 and a selected cassette size.

It displays the copy mode, etc., and also functions as a message Φ day menu for complicated operation procedures, etc. when the device is abnormal or when the user operates the screen.

Reference numeral 127 denotes a bee selection key for automatically copying two single-sided originals onto both sides of one sheet of paper using the intermediate tray in the main unit, and 128 denotes an automatic circulation type document feeder ( 129 is a copy selection key that copies a double-sided original onto one side of two sheets of paper using RDF), and 129 is a copy selection key that copies a double-sided original onto both sides of one sheet of paper using the intermediate tray and RDF. This is a copy selection key [both sides→both sides] for copying, and 130 is a multiple copy selection key for overlapping two or more images on one sheet of paper to perform multiple copying using an intermediate tray.

Note that when any one of the keys 127 to 130 is pressed, one of the indicators 159 to 162 lights up correspondingly.

Reference numeral 131 is a page continuous copying selection key, which enables exposure scanning of the original on the document table into two parts, left and right, with a single operation to obtain two copies (referred to as A copy and B copy). Select the mode to use.

Reference numeral 132 denotes a page continuous copy, multiple copy, and selection key, which has a function of multiple copying A copy and B copy in the page continuous copy mode described above onto the same sheet.

Reference numeral 133 is a page continuous copy/double-sided copy selection key, which has the function of copying the above-mentioned A copy and B copy onto the front and back sides of the same sheet using the intermediate tray.

Reference numeral 134 denotes a frame erase key which has the function of erasing a tree edge or a shadow appearing in the center of a double-page spread in the page snapshot mode.

Reference numeral 135 is an image shift key, which allows the image to be shifted in either the left or right direction. Also, by pressing the numeric keypad while holding down this key, the shift amount can be adjusted. Further, this shift amount can also be stored in memory using the 1oOa-e function keys.

Reference numeral 136 is an area designation key, which also serves as a release key for the area designation area. Two modes can be selected for area designation: original priority (the size of the designated area is variable depending on the magnification ratio) and cassette priority (the size of the designated area is constant regardless of the magnification ratio). Reference numeral 137 indicates an X/Y key, which is a data input key when inputting area designation using the numeric keys.

Reference numeral 138 is an in/'out key, which is a selection key for selecting whether to develop the inside of the designated area or only the outside.

Reference numeral 139 is a modification key, which is a data entry key used when calling and modifying a set area value.

140 is an inner or outer cut out of an area in multiple copies (
This is an automatic switching key for the development color (inlout) and development color, and when this mode is selected in multiple copying, the in/'out and color are automatically switched between the A copy and the B copy.

Reference numeral 141 is an automatic color switching key for image continuous copying, which has the function of automatically switching the developing color during A, copy and B copying as described above, and when the key 141 is pressed, the display 1
70 lights up.

Each of the LEDs 157 to 171 is a selection mode display group indicating that each mode is selected.

Reference numerals 172 to 174 indicate the number of set areas, and in this copying apparatus, up to three areas can be set. Reference numerals 175 and 176 are display portions indicating inner/outer removal, which are lit in the mode set by the key 138.

The value of the set area for the 177 LED group is Xm1n.

This is an indicator that indicates which one is Xmax, Ymin, or Ymax.

Reference numeral 142 is a CCD area designation key, and by pressing this switch, the optical system starts scanning and performs only the function of recognizing the area drawn on the document.

143 and 144 are a sort key and a nyrate key, respectively.

178 and 179 are indicators respectively indicating sort and rate modes.

FIG. 11 is a basic block diagram showing the configuration of the display unit.

The CPU 201 is a microcomputer that controls each display, and controls the display elements, and controls the display contents.

Based on the display (communication) data of the main CPU.

206 is a fluorescent display tube with 40 characters of 5×7 dots.

7 bits x 5 bytes of data are required to constitute one character, and 35 bits of data are sequentially read out from the character generator 203 according to instructions from the CPU 201 (7), transferred to the shift register latch driver 204, and transferred to the shift register latch driver 204. 5 bytes
e minutes, or 35 bttcy) data is latched. After that, shift register latch driver 205
Then, a digit signal that determines the timing for displaying one character is driven, and one character is displayed. In this way,
Dynamic lighting for one character at a time, and the duty ratio is l.
/40 (due to blanking time).

Further, 208 is another LED MATRIX of the display section, which is driven by dynamic lighting.

FIG. 12 is a block diagram of the vicinity of the input section of the CPU 301 that controls the main body. The key matrix 302 is a group of switches provided for each input key, and is dynamically processed by the main body CPU 301 using well-known technology to determine which key has been pressed.

A digitizer 304 is configured so that the control circuit 305 detects the x and y coordinates of the location pressed with the light pen.

306 is a coordinate input trigger signal switch provided on the pen, and in synchronization with the trigger edge of this signal, the main body CPU
301 reads the coordinates of the pressed part.

FIG. 13 is a driving block diagram of an LED array that displays a designated area provided on the document table glass frame.

LED arrays 309 and 310 are respectively installed in the X and Y directions along the glass frame, and are controlled by the CPU 301 to dynamically light up.

Figure 14 shows this situation.

When the outside of the body line area in the figure is specified, the LED indicating the X and Y coordinates corresponding to the area where the image is formed lights up (the LED in the shaded area in the figure).

Moreover, if the inside cutout is specified, only the LEDs in the shaded area are turned off, and the other LEDs are turned on.

In addition, conversely, the LED of the part of the specified area where the image is not formed
may be displayed.

FIG. 15 shows a color detection circuit of the developing device.

Projection portion 3 provided on each developer unit 311, 312
Color detection switch 313, 3 by 11-1, 312-1
Close 14. CPU301 turns ON1 the color detection switch
The color of the set developing device is determined based on the 0FF state.

In other words, each developer has its own switch pattern for each color, and as shown in the figure, three switches are used for color detection.
Then, the configuration is such that 23-1=7 types of colors can be discriminated.

Next, consider setting an area.

When you press the area designation key 136 in FIG.
``Gekou Kijun 2: Kasetsu Tokijun'' is displayed, indicating which one is currently selected by flashing.

You can also change the mode by pressing "1" or "2" on the numeric keypad. This series of displays and operations is 13
It is executed only while the 6 key is pressed.

Here, a case will also be described in which the document-based area specification mode is selected. In this mode, from the coordinate origin determined for the original, the
If you specify an area along the axis (main scanning direction), the specified area will also be automatically scaled even if you perform a variable-magnification copy.

Xm1n coordinate, Xma by numeric keypad and X/Y key
Specify the points in the order of x coordinate, Ymin coordinate, and Ymax coordinate to complete the designation of l area. Specifically, "X/Y", Xmin, "X/'Y"
”, Xmax.

"X/Y", Y min, "X/Y"
, Ymax.

Input in the order of "'X/'Y". Furthermore, each coordinate is m
Set in meters.

When the “X/Y” key is input after setting the numerical value, 17
The 7 LED groups light up in sequence, allowing the user to confirm that the coordinates of each point have been input. Also, when inputting each coordinate, use the message display to enter ``Area 1:Xm1n(^,)...○
Since it is done interactively like Q Q m m”°,
Settings can be easily made even by users using the device for the first time.

In this way, when you finish setting one area with 4 points, 17
LED 2 lights up to indicate that one area has been set. Further, the external extraction mode is automatically selected and the display 175 lights up. Here 1n10ut key 138
You can change to inner extraction mode by pressing .

Further, the area designation can also be set using a touch panel using a group of transparent electrode switches on the document table 251.

In this case, place the original face up on the original table. However, the reference point at this time is in front of the left side of the document table, which is different from the reference point when actually making a copy (the back left side). In this state, the pressing pen 252 presses two diagonal points of a specified area (restricted to a rectangle) on the document. At this time, press the input switch 253 while pressing with the suppression pen. Coordinate input by the input switch 253 is an edge trigger at the moment of pressing or releasing. is not entered.

Here, when specifying coordinates with a pen, pressing l simultaneously specifies two coordinates, X and Y, so the 172 LED groups light up two points at the same time. In addition, the input coordinates are numerically displayed on the message meeting display section at the same time as they are input, so that they can be visually confirmed. As described above, depending on the transparent digitizer input method, an area can be set by specifying only two points on a diagonal line.

Next, area specification using the CCD will be explained.

First, a document for which an area is to be specified is set on a document table and copied using a color developer (other than black). On the copied paper, a desired area is marked with a dark frame using a marker pen or the like. The reason why one color was developed here is that in order to create a difference in color density with this magic pen, it is preferable to develop the color so thinly that the desired area can be seen. If you set the 0th-order marked original (including transparent sheets, thin paper, etc.) on the original table again and press the area detection key 142, the optical system will be activated. Scanning is started, and the marked area on the document is recognized by CCn provided on the optical path. Here, the area detection assumes that only one location can be recognized in one scan. Additionally, the recognized area can be confirmed by displaying its coordinates on the message display.

The area can be specified using the three input methods described above, including the numeric keypad, touch panel, and CCU, and up to three areas can be specified by freely combining these methods.

It is also possible to store an area in a specified state using function keys 100a-b.

Furthermore, the input area can be visually confirmed not only by the message display but also by the LED array 4 provided along the X-axis and Y-axis of the document table glass 1.

In this confirmation, the area is selected using the correction key 139, that is, pressing the correction key 139 once selects the first area, pressing it once again selects the second area, pressing it once again selects the third area, If you press it one more time, it will no longer specify the area. Pressing it again selects the first area again. Furthermore, X/
By selecting each XY coordinate using the Y key 137, the corresponding coordinates can be sequentially called up on the message display, and in this state, it is also possible to modify the set area using the numeric keypad. Of course, numerical values input and set using a transparent digitizer (touch panel), CCD, etc. can also be corrected using the numeric keypad.

Furthermore, by selecting an area using the modify key and pressing the clear key 111, it is also possible to erase only a specific area.

Once the area is set and the inside and outside edges are set in this manner, the inside or outside of the area is erased by the erase means during the copying process, thereby making it possible to obtain a desired copy.

Further, it is also possible to specify the ON 7' OFF of the LED array using the operation section, and specify the area by lighting up the LEDs in a desired range.

When the CPU recognizes the coordinates of the area, it moves in the sub-scanning direction (X direction)
For, Xmtn-Xma of the image formed on the drum
The blank exposure lamp (LED array) is turned on (inner extraction) or turned off (outer extraction) in the range corresponding to x, and in the main scanning direction (Y direction), Y m of the image formed on the drum is
By turning on (inner cutout) or off (outer cutout) the I and ED arrays in the range corresponding to in to Ymax, a copy of the area with inner cutout or outer cutout is obtained.

FIG. 9-2 is a diagram showing the document placement table.

A command section 320 is provided on the front side of the digitizer 304 formed of transparent electrodes, and a command is selected by pressing it with a pen in the same way as inputting coordinates when specifying an area. In this case, the coordinates pressed with the pen are read, and if the read coordinates are in the document storage area, it is determined to be area designation or magnification designation, and if it is in the frame>/dot area, the command corresponding to the coordinates is selected.

Here, 321 is a command to copy the inside of the specified area in black, 322 is a command to copy the inside of the specified area in color (for example, red), 323 is a command to copy the outside of the specified area in black, and 324 is a command to copy the inside of the specified area in black. A command 325 is a command to copy the outside in color, and a command 325 is a command to clear coordinates input with a pen. In this way, the area and color can be specified using the digitizer.

It goes without saying that the digitizer need not be provided on the document placement glass, but may be provided on the front side of the document cover, or may be separated from the main device.

Digitizers can use various principles such as resistance value detection, capacitance detection, position detection using strain wheel detection, and position detection using light.

This copying device has an original size detection means using a CCD 18, a cassette size input means, and a zoom lens 16 for stepless magnification, thereby realizing AMS and APS.

When the copy key 117 is pressed, the optical system performs pre-canning, inputs the original image at this time to the CCD, and detects the original size. For this reason, the pressure plate 90 has a mirror surface to provide a density difference with the original so that the CCD can accurately detect the original size. Here, the toner is prevented from being deposited on the mirror surface portion and being visible as a visible image. Some documents may be detected as missing due to their high density. For this reason, once it is detected that there is no document, the lighting voltage 1 judgment reference level etc. are changed and Blisscan is performed again to detect the document size.

If the detected original setting position is more than a certain distance from the reference point, a message is issued to warn that the original setting position is defective, and execution of the subsequent copy sequence is stopped. Similarly, when CC018 detects that the document is placed diagonally, a warning is displayed and the process stops. Incidentally, the slanted placement of the original is detected from the coordinates of the corners of the original and the inclination of the original etch.

However, since the user may intentionally place the device in this way, the warning cancellation switch (not shown)
If the warning cancellation mode is selected, the copy sequence is executed even in the above-mentioned case. However, in this case, AMS and APS can be executed by determining the X coordinate and X coordinate of the farthest point from the reference point as the document size. Of course, an erasure means is required for the portion determined to be outside the document.

Furthermore, if the deviation is only about the Y-axis (optical system correction direction), image shift is automatically performed.
Appropriate images can also be obtained by adjusting the scan timing and paper transport timing.

Furthermore, even if there is a warning, it may be possible to ignore the warning and copy by pressing the copy key again.

If either the selected cassette size or copy magnification is specified for the document size detected as above,
The other can be automatically calculated and determined (AMS
, APS).

Here, the paper size calculated from the original size and magnification is not necessarily a standard size. In order to prevent the size from being interpreted as being too large due to mistakes or detection errors,
In the calculation process, the document size is made smaller (with some leeway) in small increments. in particular,
Both X and Y have a margin of 19 mm - On the other hand, the appropriate magnification is determined by the original size and cassette size, but in general, it is possible to change the magnification from standard size to standard size.
Therefore, if the detected document size matches or is approximately equal to the standard size, it is possible to select a unique magnification between these fixed sizes in preference to the accurately calculated magnification. .

Furthermore, regarding the cassette size, in addition to the standard size provided by the manufacturer, there are many cases in which special sizes are frequently used by the user or by the person leaving the country. AMS, APS
In order to perform this, the X and Y dimensions of these universal cassettes can also be registered. As with the desired area designation, there are three possible setting methods.

First, enter the asterisk (*) mode to wait for input. At this time, the dimensions will be displayed interactively on the Message Date Brake.

゛Universal 1: x (vertical): mm.

Y (horizontal): mm” In the initial state where nothing is specified here, the maximum paper size such as LGR is set for A3.

In this state, use the numeric keys to enter the dimensions mxn in the X and Y directions.
Enter in units.

Also, the paper size is set on the document table 251 and set using transparent electrodes, or the paper size is detected by CCD scanning.

It is also possible to register. CCD scanning is performed by the aforementioned area detection key (142). These detections and registrations are valid only in the universal cassette registration mode among the asterisk (*) modes.

In this way, APS and AMS of non-standard original size, non-standard cassette size, and arbitrary magnification can be executed.

On the other hand, this copying apparatus having an area specification function can also execute AMS or APS based on the size of the specified area and the cassette size or magnification, rather than the original size.

Next, the magnification setting method will be described.

In this copying apparatus, fixed magnification selection keys 122.12
3. In addition to setting the magnification using the arbitrary magnification ([zoom) selection key 125, automatic magnification selection key 124, etc., the magnification can also be set using a transparent digitizer on the document table. In this case as well, the magnification can be set by selecting the magnification setting mode using the asterisk (:*) mode and specifying two points on the digitizer on the document table. That is, the magnification is set according to the ratio of distance # from the point of the first press to the document reference point=distance # from the point of the second press to the document reference point. If you specify a point further than the first press with the second press, you can enlarge the image, and if you specify a point closer than the first press, you can obtain a reduced image. This instruction will also be displayed on the message display.

“1 push: 2 push= mm:
mm→-1-%" It is also possible to use the numeric keypad to determine the magnification by substituting binary values in the same way. By using these two magnification determination methods, the calculated magnification can be With a copying machine, it is possible to obtain the desired magnification by repeating up to two consecutive copies, so if the first copy alone is not possible, the second copy is performed at the same time. The configuration is such that the copy magnification can be specified as follows.

” o o o% 1st:QQ○%, 2nd:○O○
%''' After making the first copy, set the scaled image on the document table, enter the displayed magnification, and make another copy to obtain a copy with the desired magnification.

Therefore, in this apparatus having a copying magnification of 50% to 150%, it is possible to specify a magnification of 25% to 225%.

Incidentally, after the first copy, the second magnification may be automatically set.

Further, the copy magnification can be determined by combining digitizer input and document detection by CCD. In other words, you can use the pen to specify the position corresponding to the size you want to enlarge or reduce with the digitizer, then set the original, detect the original size during print scan, and determine the copy magnification from the ratio of the two sizes. .

FIG. 16 is a flowchart for determining the copy magnification using a digitizer or numeric keypad. First, the first
For example, enter the coordinates corresponding to the size of the document using the Light Men or numeric keypad.
For example, the coordinates corresponding to the desired copy size are input (step 2).The coordinates are input by specifying a point diagonal to the origin on the platen glass. Furthermore, when inputting with a numeric keypad, only the X or Y coordinate is sufficient. Then, the copy magnification is calculated based on the input coordinate 2/coordinate 1 (
Step 3): It is determined whether the calculated copying magnification is within the variable magnification range of the apparatus: Step 4); if it is within the range, the magnification is displayed (: Step 8). If it is outside the range, find the square root of the calculated magnification to check whether it can be copied twice (Step 5), and check whether the value is within the range that can be changed (Step 6) , if it is within the range, use the obtained square root value as the copying magnification for the first and second copying.
The second copying magnification is displayed (Step 9), and if it is outside the range, a warning is displayed to that effect (Step 10).

If the first and second copy magnifications are the same, that is, the square root of the desired magnification, the second magnification setting becomes unnecessary.

In addition, the first and second copying magnifications do not need to be calculated using the square root, but the first copying magnification is the first copying magnification that is possible in one copying, and the first copying magnification is the first calculated copying magnification. The value divided by can be used as the second copy magnification.
Therefore, many combinations exist. Also, it is clear that a wider range of magnifications can be obtained by copying 3rd or 4th times, unless the image quality is considered.

Next, we will explain the control of copying operations, focusing on functions such as image continuous copying, multiple copying, area specification, etc., in Figures 16-2 and 1.
This will be explained using the flowchart shown in Figure 6-3. The cutter 11 determines whether or not the copy start key is turned on, and if it is turned on, executes the copy routine (
: Steve 12).

The copy routine shown in FIG. 16-3 will now be explained. First, determine the copy magnification and copy density, and then
Adjust the developing bias, etc. (steps 30 and 31), and decide whether or not to select color, that is, enter color copy mode [step 32], and if it is not in color mode, select the black developer. Next, step 33), if the color mode is selected, select a color developer (step 34), and then judge whether there is an area specification (step 35), if there is an area specification, it will change the magnification. If it is not the cassette standard, it will be the original standard, and the area itself will be scaled according to the magnification ratio, so multiply the set area by the copy magnification determined in step 30. Set the obtained area as the set area (step 37). Therefore, when cutting out the inside or outside of the area, set the blank LED corresponding to this new area.
All you have to do is turn on the button 3 to determine which mode the I in/out key is in, i.e. whether it is in or out of the area.
8) If it is in mode, set a flag to control the blank exposure lamp and erase the outside of the area.Step 3
9) If it is the out mode, a flag is set to erase the inside (step 40).

Also, if there is no area specified, the above control will not be performed.Then, it will be necessary to judge whether or not the mode is set to quick page copying (Click 41), and if it is image continuous copying, A copy (41) will be used to determine the scan width. rg', copy the left half of the original placed on the manuscript table). Step 4
2) If it is an A copy, set the flag to perform A scan (]V, scan the left half of the document placed on the draft table): Step 43), if it is not an A copy, set the flag to perform B scan (of the document). Set a flag to scan the right half (scanning the right half) (step 44), scan according to the size of the document if it is not a quick copy of the page, and perform exposure, development, and transfer according to the conditions determined by the above judgment. .

Copy processing such as fixing is performed (step 45).

The above is an explanation of the copy routine. Returning to FIG. 16-2 again, it is determined in step 12-1 whether or not it is a double-sided copy, and if it is a double-sided copy, the copy is stored in the intermediate tray with the copied side facing up (step 12-2). If not, use the cutter 13 to determine whether or not it is multiple copying, and if it is not multiple copying, eject the paper to the paper output tray.Step 1
4) If it is a multiple copy, store it in the intermediate tray with the copied side facing down (Step 15), and check whether it is in the automatic color and area conversion mode, i.e. 1
In the second and second copying, it is determined whether or not the key 140 (key 41) has been pressed to perform automatic conversion of inner and outer areas and automatic conversion of nine colors (step 16).

If it is in automatic conversion mode, color and area outline,
Convert the outside cut (Ni step 17).

Then, it is determined whether or not it is in image continuous shooting mode (step 18), and if it is not image continuous shooting mode, it waits for the manual copy start key input (step 2).
0), if it is the R-zi continuous shooting mode, the copy routine is executed again (step 21).

FIG. 16-4 shows an example in which an area is designated and an unaltered copy is made without outside.

('a) represents the original, and the dashed line 350 represents the specified area. When the magnification is changed based on the original, the area is also resized as shown in (b), and the image is not missing within the resized area. It subsides. However, when copying at a variable size based on the cassette standard (C
), only the image is scaled and the area is not scaled, so part of the image may be missing.

Next, color conversion in double-sided copying in image continuous copying mode will be explained. Place two originals (A4 size or smaller) on the original table and press the page continuous copy/double-sided copy selection key 133.
When the automatic color switching key 141 is pressed, a mode is set in which double-sided copying is performed by changing each color in continuous image copying. When the copy start key 151 is pressed in this mode, only the original placed on the left side is scanned, copied onto the front surface of the recording paper, and stored in the intermediate tray. At this time, the switch 41 is set on the upper side, and the recording paper is stored in the intermediate tray with the copied side facing up. The developer is then automatically replaced to change the color, and the next document is scanned. At this time, the blank exposure lamp lights up during blanking of the first document, and no latent image is formed on the first document.The recording paper stored in the intermediate tray is fed to the position of the registration roller. The sheet of paper is sent to the drum at the timing when the leading edge of the latent image on the first sheet of paper coincides with the leading edge of the recording paper. Note that when a binding margin is formed, the timing may be accelerated or delayed accordingly. The right original image is then copied onto the back side of the recording paper and ejected to the outside of the machine. In this way, a double-sided copy with different colors on the front and back sides can be obtained.

Note that if the changer 41 is set on the lower side, the recording paper is stored in the intermediate tray with the copied side facing down, so multiple copies can be made with the originals on the left and the originals on the right in different colors. It will be done.

Furthermore, when performing double-sided copying or multiple copying, it is also possible to specify an area and copy.

Further, color conversion is possible even when not in the page snapshot mode, and in the multiplex mode or double-sided mode, the developing device is automatically replaced after the first scan, and the second scan is awaited.

(Operation of CCD) FIG. 17 is a circuit block diagram of this embodiment.
is a control microcomputer, 18 is a CCD image sensor, 401 is an A/D converter, and 402 is a CC
D drive Valpal, JI-Quantity Kano 1 7, f
A ＾ り I↓ 7! m 1m Kano Iso
C-/F'l i 1-start signal, 404 is also a document/' area mode switching signal, 4 from an external circuit
05 is the home position signal from the optical system home position sensor 15, 406 is the image tip signal from the image tip sensor 30, and 407 is the CCD image sensor 1.
8 shift pulse signal, 40B is reference clock signal φ
, 409 is a transfer lock signal φ1 of the CCD image sensor 18. 410 is a transfer lock signal φ2.41.
1 is the reset Φ pulse R of the CCD image ψ sensor 18
3, 412 is the output signal CCD OUT of the CCD image sensor 18, 413 is the clock signal A/DCLK of the A/D ninverter 401, and 414 is the CCD image sensor 18.
Digital signal DAT after A/D conversion of the output of sensor 18
It is A. 14 is a lamp for document illumination, 415 is a lamp dimming circuit, 416 is a lamp on/off signal, 417
is the dimming data.

The dimming circuit 415 is configured to apply a voltage proportionally corresponding to the value of the dimming data 417 to the lamp 14 .

To briefly explain the operation, first, microcomputer 4
When a copy output signal 403 is applied to 00 from the outside, a program for document detection and area recognition, which will be described later, is read from a ROM (not shown) and starts running.

First, the micronin computer 400 uses a built-in timer function to output a reference clock signal φ408 and an A/D converter clock signal A/'DCLK413 to the pulse generator 402 and A/D converter 401, respectively.

From the reference clock signal φ408, the CCD drive pulse generation circuit 402 transfers locks φ1 409 and φ2 410, and a reset pulse, 2. R541
1 is made. The output signal C of the CCD image sensor 18 driven by these clock pulses is
CD0UT412 is output by A/D converter 401.
A/'D converted and its digital output DATA41
4 is read from the input port of the microcomputer 400. The document/'area mode switching signal 404, home position signal 405, and image tip signal 406 will be described in the explanation of the flowchart to be described later.

Further, when dimming for the CCD image fist sensor 18 is required, the dimming circuit 415 turns on the lamp 14 in response to a lamp on/off signal 416. Microcomputer 400 is CC
A/D conversion value DA of the output signal of the D-image fist sensor 18
While looking at TA414, read the dimming data CVRDATA4
17, the lamp 14 is dimmed to an appropriate brightness, and the value of the dimming data 417 at that time is stored.

Furthermore, when performing AE, the lighting voltage of the lamp 14 is controlled by changing the value of dimming data 417 using AE data, which will be described later, so as to obtain appropriate exposure.

Figure 18 shows shift pulse 5h420, transfer lock φ
1・421, φ2・422 and reset pulse R
5, and the CCD output signal CCD 0UT424,
A/D:ryz<-ta*clock AD CLK425
．． The 0 interrupt program, which is a timing diagram showing the phase relationship between the output DATA 426 of the A/D Ninparter and the interrupt timing 427, will be described later.

FIG. 19 is a diagram showing the relationship between CVRDATA and lamp lighting voltage.

FIG. 20 is a simple principle diagram of the document detection method. 40
3 is the shift pulse signal 5h of the CCD image Φ sensor
407 and 431 are output signals C of the CCD image sensor
CD0UT4'12, 432 is the threshold level,
91 is a standard white board, 93 is a document storage reference position, 15 is an optical 'fh home position sensor, 30 is an image tip sensor, 12 is a document table, 435 is a document, and 436 is a microcomputer for the output of the CCD image fist sensor. This is the position to be processed in step 400.

The reason why the output data of the CCD image sensor is not all processed in each line as shown in the figure, but is processed at regular intervals is because the processing speed of the microcomputer 400 may be slow. Shifting the processing position line by line is a means to prevent the detection accuracy from decreasing as much as possible.

FIG. 21 is a conceptual diagram of area designation by marking.

441 is the original manuscript, A4J is the original manuscript, 422 is a dummy copy made from the original manuscript, and 433 is the dummy copy.
Markings on copies, 444.445 are the obtained copies.

To explain the procedure, first set the original document 441 on the document table, perform the copy operation in dummy copy mode, and make a thin dummy Φ copy 4 with colored toner such as red.
Get 22.

For this Gummy e-copy 422, select the area you want to specify by 4
Set the dummy copy marked with a black marker or the like as shown in 43 on the document table, scan the optical system in the area recognition mode, and detect the marked area. Original manuscript 4
By setting 41 on the document table and copying by specifying the inside and outside of the area, copies such as 444 and 445 can be obtained.

446 indicates the name of each part when a marked document is processed by a document detection and area recognition program to be described later, and 451 to 456 are stages 1 to 6, respectively.

FIG. 22 shows the main flow of the document detection and area recognition program. The entire control program is set up so that this program is executed when the need for document detection or area recognition arises during the flow of the copying sequence.This flowchart will be explained according to the diagram shown in FIG. When the need for detection or area recognition arises, a program according to this flowchart is executed from step 1. In step 2, first, various counters (clock counter, line fist counter) on the RAM are
In order to generate various pulses to drive the CCD image sensor in the zero-order step 3 where initialization is performed, the reference clock φ408 and the clock pulse A/DCLK413 of the A/D converter are output. Microcomputer 400 built-in timer function (with interrupt function) for clock pulses
Next, in step 4, wait for the optical system home position signal 405, and if the signal is detected, proceed to step 5, and wait for the image tip signal 406. If the zero image destination signal 406 is detected, In step 6, interrupts are enabled. Then, in step 7, the process waits until the document or area detection completion flag is set. If it is set, the program is exited from step 8 and continued with another program.

FIG. 23 shows a part of the interrupt routine of the document detection and area recognition program, and the flow is executed at the timing shown in FIG. , in step 1O, a clock counter that counts the number of output data for each column outputted in time series from the CCD image sensor is counted up.

Then, in step 10, it is determined whether it is the timing to output the shift pulse 407 based on the value of the clock counter, and if the timing is right, step 22 is carried out.
The program jumps to the sh routine as shown in FIG. If there are multiple interrupts, jump to step 21 and extract them from the interrupt program. If yes, go to step 13 and check whether it is the data read position (timing) or not by checking the sample point value and the clock counter. Judgment is made by comparing the values (whether they match or not). If the sample point value and the clock counter value are different, the process jumps to step 21 and is extracted from the interrupt program. If they match, it is determined that the reading position is reached, and the process proceeds to step 14, where the original/area signal 404 is used. , determines the mode. If the area detection mode is selected, the process jumps to the area detection mode routine as shown in step 23. If the original detection mode is selected, the process proceeds to step 15 and the CCU
By comparing the A/'D conversion value of the CC image sensor and the set threshold level value, it is determined whether the original is at the position on the original platen 12 indicated by the current line counter and clock counter values. Please judge. If there is no document, the process jumps to step 18, and if there is a document, the process goes to step 16. In step 16, the clock counter value XmaXl is stored in the buffer. This value is updated every time there is a document in one line, and eventually, the value of the clock counter at the time of the data for which it was determined that there was a document in that line is the value for each line. Everything will be memorized line by line.

Next, in step 17, all the lines processed so far, the maximum and minimum clock counter values Xmax and Xm1n when it is determined that there is a document, and the maximum and minimum values of the line counter Value, Ymax, Ym
Compare i n with the current clock write counter and line counter values, and update if necessary.

Next, in step 18, the A/D converted value of the CCD image sensor output is stored in a buffer for one line. In step 19, it is determined based on the value of the clock counter whether data processing for one line has been completed, and if it has not been completed, the sample Φ point, which is the collection position of AE data, is updated in step 20, and then step 21 is performed. Exit the interrupt program by passing through it. If it is finished, in step 24, the data from the first data determined to have a document present to the last data determined to have a document among the A/D conversion values of the 1247-minute CCD image sensor output is processed. AE data counters corresponding to the maximum and minimum values are counted up. However, when an area for AE data collection is set, the AE data counter is counted up only within that area.

The AE data counter is prepared for the maximum value, minimum value, and all values for each line, and serves as data for performing AE.0 Next, in step 25, Xmaxl is The value is stored in a RAM specific to this line so that it will not be updated in the next line processing. Then, remove the interrupt program from 21.

FIG. 24 is a part of the interrupt routine of the document detection and area recognition program. If it is the area detection mode in step 14 of FIG. 23, the process jumps to step 26 of this figure as shown in step 23.
It is determined by the flag whether it is the first stage in FIG. 1, and if it is the first stage, it jumps to the 5EQI routine as shown in step 35. Step 30. 21 in FIG. 21, respectively. 3rd゜4th. Determine whether it is the fifth stage based on the flag, and if YES in each case, step 36. Step 37゜Step 38. 5EQ2 like step 39.

5EQ3.5EQ4.5Jump to EQ5 routine. If no, proceed to the next step.

In step 32, it is determined whether the data processing for l life has been completed or not based on the clock counter (t4). If it has been completed, the process jumps to step 34 and exits from the interrupt program. - After updating the points, proceed to step 34 and remove the interrupting program.

FIG. 25 is a part of the interrupt routine of the document detection and area recognition program. Figure 24 Step 27. Step 28. Step 29゜Step 30. Step 31 to Step 41 in the figure. Step 45. Step 49
．． Step 54. Jump to step 58.

Jumping to step 41, in step 42 C
The A/D conversion value of the CD image sensor output is compared with the set threshold level value, and it is determined whether the original is at the position on the original platen 12 indicated by the current line Φ counter and clock exposure counter values. Please judge. If there is no W document, the process jumps to step 44, and then to step 40 in FIG. 24. If there is a * document, the process jumps from step 44 to step 40 in FIG. 24 as a second flag in step 43.

Jumping to step 45, in step 46 C
The A/D conversion value of the CD image sensor output is compared with the value of the set threshold e level to determine whether it is the level of dark spots. If it is not at the black spot level, the process jumps from step 48 to step 40 in FIG. 24. If it is at the black spot level, the flag is set to the third stage in step 47, and the process jumps from step 48 to step 40 in FIG.

When the process jumps to step 49, it is similarly determined in step 50 whether there is a document, and if there is no document, step 5
3 and jump to Nutetsubu 40 in Fig. 24. If there is a manuscript, proceed to step 50, and set Xmin, Xmax.
,Ymin.

Compare and update the value of Y m a x and the current line counter and clock fist counter 0 Next step 52
The flag is set to the fourth stage in step 53, and the flag is set to the second stage from step 53.
Jump to step 40 in Figure 4.

When it jumps to step 54, it goes to step 55 and similarly judges whether it is the level of the black spot, and if it is not the level of the black spot, it jumps from step 57 to step 40 in Fig. 24, and if it is the level of the black spot, it goes to step 56. After setting the flag to the fifth stage, the process passes through step 57 and jumps to step 40 in FIG.

If the process jumps to step 58, it is determined in step 59 whether or not there is a similar original, and if there is no original, step 62
Then jump to step 40 in FIG. 24. If there is a manuscript, in step 60 Xmin, Xmax, Ym
Compare i n and Ymax with the current line counter and clock counter values and update. Then, in step 61, the flag is set to the sixth stage, and the process jumps to step 40 in FIG. 24 through step 62.

FIG. 26 is a part of the interrupt routine of the document detection and area recognition program. If it is determined in step 11 of FIG. 23 that it is time to issue the shift pulse (407), the process jumps to step 33 of the figure as shown in step 22. Then, in step 64, a shift pulse 407 is outputted at the timing shown in FIG. In step 65, the line counter is counted up, and in step 66, it is determined whether the last line to be processed has been completed or not based on the value of the line counter. If it has been completed, the process advances to step 67. The output of the shift pulse 407 is fixed to high, and interrupts are disabled in step 68, and step 69
AE data is created in step 72, and the interrupt program is extracted in step 72.If it is determined in step 66 that the program has not been completed, the process proceeds to step 70, where the values of the sample daint and 1 line end are set, and the interrupt program is extracted in step 72. In step 71, counters and the like are initialized, and the interrupt program exits from step 72.

FIG. 27 shows the main flow of a document detection and area recognition program when using page memory. The entire control program is set up so that when the need for document detection or area recognition arises during the flow of the copying sequence, this flowchart will be explained according to Figure 0. When the need for detection or area recognition arises, a program according to this flowchart is executed from step l. In step 2, first, various counters (clock counter, line counter) etc. on the RAM are initialized, and then in step 3, various pulses are generated to drive the CCD image sensor. , reference clock φ@408, and A/D controller clock.
In this embodiment, the two clock pulses are both oscillated by the built-in timer function (with interrupt function) of the microcomputer 406. Next, in step 4, the optical system home Wait for the position signal 405, and if the signal is detected, proceed to step 5 and wait for the image head signal 406.0 image head signal 4
If 05 is detected, the interrupt is enabled in step 6. Then, in step 7, wait until the document or area detection completion flag is set. When it is set, in step 8, the CCD output data on the page memory is sequentially read, and in step 9, the area A (
If so, the AE data counter corresponding to the data in area A is counted up in step 10, and if not in area A, in step 13, in area B (see FIG. ) increments the AE data counter corresponding to that data. Steps 8 to 11 are repeated until processing is completed for all data in step 11, and when the processing is completed, the program is exited from step 12 and the program ends.

FIG. 28 shows a part of the interrupt routine of the document detection and area recognition program, and the flow is executed at the timing shown in FIG. 18. When a 0 interrupt occurs, the main flow is entered from step 14. In step 15, a clock counter that counts the number of output data outputted in time series from the CCD image sensor for each column is counted up.

Then, in step 16, it is determined whether it is the timing to output the shift pulse 407 based on the value of the clock counter, and if the timing is correct, step 27
Jump to the sh routine as shown in . If not, it is determined in step 17 whether the program currently being executed has multiple interrupts, based on the flag. If there are multiple interrupts, jump to step 26 to extract them from the interrupt program; otherwise, go to step 18 to determine whether or not it is the data read position by comparing the value of the sample point and the value of the clock counter. do. If the sample point value and the clock counter value are different, the process jumps to step 26 and is extracted from the interrupt program. If they match, the reading position is determined and the process proceeds to step 19, where the document/area signal 404 is extracted. The mode is determined based on this. If the area detection mode is selected, the process jumps to the area detection mode routine as shown in step 28. If the document detection mode is selected, the process proceeds to step 20 where the A/D conversion value of the CCD image sensor output and the certified threshold level value are obtained. By comparing , it is detected whether or not the original is located at the position on the original platen 12 indicated by the current values of the line counter and the clock counter. If there is no document, the process jumps to step 23, and if there is a document, the process proceeds to step 21. In step 21, the value of the clock counter is stored as X m a x 1 in the buffer. This value is updated every time there is a manuscript in the l line, and finally, the value of the clock counter at the time of the last data judged to have a manuscript in the data of that line is updated. Everything will be stored for each line.

Next, in step 22, all the lines processed so far and the clock at the time of the data judged to have a document are
Maximum value, minimum value of counter value Xmax, Xm1n, maximum value, minimum value of line counter value, Ymax
, Ymin and the current values of the clock counter and line counter, and update if necessary.

Next, in step 23, the A/D converted value of the CCD image sensor output is stored in a buffer for one page. In step 24, it is determined based on the value of the clock counter whether data processing for one line has been completed, and if it has not been completed, the sample point is updated in step 25, and then the interrupt program is exited through step 26. If the output has been completed, in step 29, the last data of the A/D conversion values of the CCD image sensor output for 1 line, which is determined as having a document, is
The value of x4 is stored in a RAM specific to this line so that it will not be updated in the next line processing. Then, from step 26, the interrupt program is extracted.

FIG. 29 is a part of the interrupt routine of the document detection and area recognition program. If it is the area detection mode in step 19 of FIG. 28, the process jumps to step 30 of this figure as shown in step 28.
It is determined by the flag whether it is the first stage in the diagram, and
If it is, jump to the 5EQI routine as shown in step 39, similarly step 32, step 33. Step 34. 21 in FIG. 21, respectively in step 35. 3rd゜4th. Determine whether it is the fifth stage based on the flag, and if YES in each case, step 40. Step 41゜Step 42. 5EQ2゜5EQ3 like step 43
．． Jump to 5EQ4.5EQ5 routine, if NO, proceed to next.

In step 36, it is determined whether the data processing for one line has been completed or not based on the value of the clock counter. If it has been completed, the process jumps to step 38 and exits from the interrupt program; if it has not been completed, the step After the sample points are updated in step 37, the process proceeds to step 38, where the interrupt program is extracted.

FIG. 30 is a part of the interrupt routine of the document detection and area recognition program. Figure 29 Step 39. Step 40. Step 41゜Step 42. Nute, whelk 43
Accordingly, step 45. of this figure. Step 49. Nutetubu 5
3. Step 58. Jump to step 62.

Jumping to step 45, in step 46 C
The A/D conversion value of the CD image sensor output is compared with the set threshold level value, and it is determined whether the original is at the position on the original platen 12 indicated by the current line counter and clock counter values. Please judge. If there is no document, the process jumps to step 48, and then to step 44 in FIG. 29. If there is a document, the process jumps to step 47, and the flag is set to the second stage, and the process jumps from step 48 to step 44 in FIG.

Jumping to step 49, in step 50 C
The A/D conversion value of the CD image sensor output is compared with the value of the set threshold φ level to determine whether it is the level of black spots. If it is not at the black spot level, the process jumps from step 52 to step 44 in FIG. 29. If it is at the black spot level, the flag is set to the third stage in step 51, and the process jumps from step 52 to step 44 in FIG.

When the process jumps to step 53, it is similarly determined in step 54 whether there is a document, and if there is no document, step 5
7 and then jump to step 44 in Figure 29. If there is a manuscript, proceed to step 55 and set Xm1n, Xmax, Ym
In.

Compare and update the value of Ymax with the current line counter and clock counter values.Next step 56
The flag is set to the fourth stage in step 57, and the flag is set to the second stage from step 57.
Jump to step 44 in Figure 9.

When it jumps to step 58, it is similarly determined whether it is the level of black waku, and if it is not the level of black waku, the process jumps from step 61 to step 44 in FIG. 29, and if it is the level of black waku, the flag is set to After setting the 5th stage, the process passes through the 7th step 61 and jumps to step 44 in FIG.

When the process jumps to step 62, it is similarly determined whether or not there is a document, and if there is no document, the process jumps to step 66 and then to step 44 in FIG. 29. If there is a document, in step 64, Xm1n is executed.

Compare Xmax, Ymin, and Ymax with the current line counter and clock counter values and update them. Then, in step 65, the flag is set to the sixth stage, and then in step 66? a') Q II
FIG. 31 is part of the document detection and area new style program interrupt routine. In step 16 of FIG.
If you decide it's time to roll a 7.

As shown in step 27, the process jumps to step 67 in the figure. Then, in step 68, a shift pulse 407 is outputted at the timing shown in FIG. In step 69, the line counter is counted.
Then, in step 70, it is determined from the value of the line counter whether the last line to be processed has been completed, and if it has been completed, the process proceeds to step 74, where the output of the shift pulse 407 is fixed at high. At step 72, interrupts are disabled, and at step 73, AE data is created, and at step 76, the interrupt program is extracted.

If it is determined in step 70 that the process has not been completed, the process proceeds to step 74, where the values of the sample point and l line end are set, and the counters etc. are initialized in step 75, and the interrupt program exits from step 76.

FIG. 32 is a flowchart of the dimming program. When light adjustment for the CCD image sensor is required on the sequence, a program according to this flowchart is executed. In step 2 following step 1, the lamp is first turned on by a lamp on/off signal. At this time, the dimming data takes a preset value at step 3.
Reference clock φ・408, A/D converter・
Clock, A/D CLK413, shift pulse s
h407 is output and the CCD image sensor is driven.In step 4, from DATA414 of the A/'D conversion value of the output of the CCD image sensor,
Determine whether overflow has occurred. over·
If the flow occurs, proceed to step 5 and set the dimming data 4.
Count down 17 by 1, return to step 4, and continue this loop until there is no more overflow.
2. If no overflow is observed in step 4, the process proceeds to step 6, where the dimming data is counted up.Next, in step 7, an overflow check is performed, and the process returns to step 6 until an overflow occurs. When over -70- occurs, the process advances to step 8 to store the dimming data, and in step 9 the dimming program is executed.Next, a method for writing characters on copy paper will be explained with reference to the drawings. In Figure 33, 1 is the photosensitive drum and arrow A in the figure
Rotate in the direction of.

Reference numeral 12 denotes a document table glass, and 45 denotes a moving optical system (scanner) that moves in the left and right directions in the figure. Reference numeral 14 denotes a lamp for document verification, which moves together with the moving optical system 45. Arrow B indicates the optical path.

23 is a blank exposure unit (erase means).

FIG. 34 shows 23 blank exposure units, in which 701a is a minute LED, with high density, for example 4
The photosensitive drums 1 are arranged in 6 arrays along the axial direction of the photosensitive drum 1 (hereinafter referred to as LE).
(referred to as D array 701), and above it is the LE of 701.
A SELFOC lens array (not shown) is arranged to form an image of the light D on the photoreceptor. A plurality of LEDs 702a are relatively large and are arranged along the axial direction of the photosensitive drum l at a pitch of, for example, 2.5 mm (hereinafter referred to as blank LEDs 702).

In FIG. 35, 705 is a slit device provided in the moving optical system 45, 704 is a slit, and 703
is a continuous material, 708 is a slit device 705 and a continuous material 703
The connecting member 703 is a spring connected to the rod 707.
is connected to solenoid 706. When the solenoid 706 is energized, the connecting member 703 moves along the broken line 7 in the figure.
Move to position 03', connect part of slit 704,
It is designed to cut out part of the light that is exposed to the original. On the other hand, when the solenoid 706 is de-energized, due to the force of the spring 708.

The continuous member 703 returns to the position indicated by the solid line in the figure, and no longer blocks the document exposure.

FIG. 36 shows the irradiation area on the drum 1 by document exposure, blank LED, and LED array.

730 is the area illuminated by the LED array, 731 is the area illuminated by the blank LED, 732 is the document exposure irradiation area when the solenoid 706 is not energized, and 733 is the document when the solenoid 706 is energized. This is the exposure irradiation area. The areas 730 and 731 and the areas 730 and 733 overlap to some extent. Also, the side marked with a mark in the diagram is the transfer paper feeding base side.
Regardless of the paper size, the paper is conveyed with the paper edge aligned here. Therefore.

By arranging the LED array 701 at the size of the transfer paper, it is independent of the size of the transfer paper and the transfer magnification.

You can write any characters, etc.

Regardless of image exposure, a white latent image is formed in the area 730 if all the LED arrays 701 are lit, and in the area 731 if all the blank LEDs 702 are lit. Also, if the solenoid 706 is not energized and the LED array 701 and blank LED 702 are all turned off during document exposure, 7
A latent image of the document is formed over the entire area 32. On the other hand, when exposing the original, the solenoid 706 is energized and the blank LED 7 is turned on.
When the light 02 is turned off, a latent image of the document is formed in the area 733. Further, since no light from exposing the area 730 of the original is incident, the LED array 701 is rotated to the process speed and is sequentially and selectively turned on to form a latent image of a pattern such as a desired character. be able to. Note that writing a pattern such as a character by selectively lighting the LED array 701 is called a writing mode.

FIG. 37 shows the state after transfer when patterns such as characters are formed on copy paper (transfer paper).

The arrow indicates the direction of movement of the transfer paper 734, desired characters (patterns) are copied in the area 735, and the original image is copied in the area 736. FIG. 38 shows an example of a lighting pattern of the LED array 701, and in FIG. 38, 8×8 dots are shown for ease of explanation. In the figure, 1 indicates the lighting state of the microLED, and 0 indicates the non-lighting state. 1 to 8 in the diagram are LEDs
For the individual LEDs of array 701, arrows indicate time series (time t
) is shown. FIG. 39 shows a timing chart for creating patterns such as characters.

In this example, the number 2'' will be written. For example, if a pattern obtained by rotating the pattern shown in FIG. 38 is provided, it is possible to rotate and write "°2°" at various angles.

FIG. 40 shows an operating unit for actually executing a write operation using the LED array 701.

Incidentally, this operation section may be provided in the operation section shown in FIG.
50-755 LED display element, 756 is dot matrix LCD (liquid crystal display), 7
57 to 764 are key switches; key 757 in the figure;
758.

759 is a mode specification key for selecting what to write, and when key 757 is pressed, LED 750 lights up.
It is possible to write the date. Further, when the key 758 is pressed, the LED 751 lights up, and writing of the page is disabled. When the key 759 is pressed, the LED 752 lights up and it becomes possible to write a serial number.

The key 760 is a key for setting the numerical value to "°1" when in the page and serial number writing mode. The key 761 is a key for specifying the position and direction of writing characters, and as shown in FIG. 41, the position and direction of characters on the transfer paper can be specified. Each time the button is pressed, the states 41-1 to 41-6 are rotated. With this, by changing the direction in which the document is placed, characters can be written on the desired edge.When the key 762 is pressed, the LED 753 lights up and the written characters become negative.

For example, if the light emitting pattern "1°"0" in FIG. 38 is reversed, "2°°" is written in white on a black background. The key 763 is pressed to change the color of the characters to be written and the original portion. When the key 763 is pressed, the LED 754 lights up. 764 is a key pressed when writing (designating write mode), and LED 755 lights up.

By pressing this key again, the LED 755 turns off and the write mode is canceled. Reference numeral 756 is an LCD that displays written contents, and for example, when in date mode, the date is displayed. Also, when the position and direction are changed using the key 761,
It will be displayed in the corresponding position and direction.

This situation is shown in FIG. In the figure, 42-1 to 4
2-6 corresponds to the writing positions of the transfer paper 41-1 to 41-6 shown in FIG. 41 described above. 756 is the aforementioned L
It's a CD.

FIG. 43 shows an example of a control circuit for writing characters and patterns in this embodiment, in which 770 is a CPU (central processing unit) consisting of a microprocessor, and 771 is a CPU.
LCD driver connected to 771, 756 is the aforementioned LC
It is D.

780 is the aforementioned key switch 757-764.780b
is LED driver, 780a is LED 750-755
It is. 781 is a timer circuit, which functions as a clock. 772 is a drive circuit for driving the LED array 701, and is capable of selectively lighting each of the minute LEDs. 774 is a blank LED 702
In the drive circuit for driving the blank LED 702, each LED of the blank LED 702 can be turned on arbitrarily under control from the CPU 770.

776 is a solenoid drive circuit, and 706 is the aforementioned solenoid. 778 is a lamp lighting circuit for lighting the lamp 14.

The solenoid 706 and lamp 14 can be turned on and off under the control of the CPU.

First, a mode in which writing of characters, etc. is not performed will be explained.

The time chart is shown in FIG. 44. The drum starts rotating by the copy start, and the blank LED 702,
LED array 701 lights up. Ramp 1 after the end of the previous rotation
4 lights up, and the optical system 45 starts moving forward. sensor 30
After a time T1 corresponding to the distance between the optical axis and the blank unit from the image tip signal output from the blank LED 702,
When the LED array 701 is turned off, image exposure is performed on the photosensitive drum and formation of a latent image is started. When the optical system reaches the inverted position, the lamp 14 is turned off and the blank LED 70 is turned off.
2. Turn on the LED array 701. This prevents unnecessary images from being formed when the optical system moves backward. When the optical system is reversed and returned to the home position, one cycle ends.

Next, the operation for writing characters on the leading edge of the transfer paper as shown in FIG. 41-1 will be explained.

FIG. 45 shows the time chart. The shaded area in the diagram is L.
This shows that the ED array 701 is selectively turned on. Blank LED 702, LE due to copy start
The D array 7o1 lights up and performs forward rotation. At this time, the solenoid 706 is energized, the optical system starts moving forward, and after T1 hours from the image tip signal, the blank LED 702 goes out, and the LED array 701 turns off. Selective lighting begins synchronously, forming a character latent image. At time A when a predetermined character has been formed, the LED array 701 is fully lit.1. Turn off solenoid 706. After 12 hours from timing A (time considering the response of the solenoid), the LED array 701
1. All lights are turned off, and the original image is also copied to the edge of the transfer paper. This sequence prevents unnecessary stains from occurring at the border between the text area and the original area at the edge of the copy paper. When the optical system reaches the inverted position, the lamp 14 is turned off and the blank LED 702 is turned off.
The LED array 701 is fully lit. One cycle ends when the optical system returns to its home position.

Next, an explanation will be given of the operation when writing characters on the trailing edge of the transfer paper. The time chart is shown in FIG. 46. When the copy starts, the blank LED 702 and the LED array 7
01 lights up and performs forward rotation, lamp 14 after completion of forward rotation
lights up and the optical system advances.T1 hours after the 0-picture ahead signal, the blank LED 702 and the LED array 701 go out. After further time T3=((transfer paper size - character length)/process speed - T2), the solenoid 70
6 is turned on, and the LED array 701 is fully lit.

Further, after time T2 has elapsed, the LED array 701 is synchronously and selectively started to light up to form characters and the like. When the optical system reaches the inverted position, the lamp 14 is turned off, the blank LED 702 and the LED array 701 are all turned on, and the solenoid 706 is turned off. When the optical system 45 returns to its home position, one cycle ends.

As described above, desired characters can be written on the front or rear of the transfer paper. Furthermore, by changing the writing timing of characters, it is also possible to write characters in the middle of the transfer paper.

A timing chart in this case is shown in FIG. 47. When copying starts, the blank LED 702 and the LED array 701 light up. After the end of the previous rotation, the lamp 14 is turned on and the optical system starts moving forward after a time T1 has elapsed since the 0-pixel ahead signal, the blank LED 702 and the LED array 701 are turned off, and a latent image of the document begins to be formed over the entire surface. After 19 hours corresponding to the writing position have elapsed, the solenoid 706 is turned on and the LED array 701 is fully lit. Further, after the elapse of time T2, the LED arrays are sequentially selectively turned on to form a desired character latent image. After completing the formation of the specified character latent image,
The solenoid 706 is turned off and the LED array 701 is turned on. After time T2 has elapsed, the LED array 701
Turn off the light and start exposing the edges of the document again. When the inversion position is reached, the lamp 14 turns off, and the blank LED 702,
The LED array 701 is fully lit. One cycle ends when the optical system returns to its home position.

Next, each mode of writing contents will be explained.

When in date mode, always write the date of the day.

In the page mode, after copying a predetermined set number of sheets for one document, the number of pages is increased by one. Therefore, each time the original is replaced, the page number written is 1.
The pages will be uploaded one by one, and the predetermined number of pages will be automatically written as the transfer paper number.

In addition, in the case of serial number mode, when copying a predetermined number of sheets for one original, the serial number is incremented for each copy, and "1" is added when copying the next original starts.
”, so for one original copy,
It will automatically number consecutive numbers. Furthermore, successive numbers can be automatically written sequentially from l to the next copy of the original. FIG. 48 shows a flowchart after copy start.

In FIG. 48, the write register is a register for storing data related to various modes, and the contents set here are written on the transfer paper by the LED array 701 as described above. There is. The PAGE register is a register for storing page numbers.

Further, this register is set to "l" at the initial time and when the page mode is newly switched. First, the operation in date mode will be explained. In step 800, it is determined whether the mode is date mode or not, and since YES is determined here, the date is set in the write register in step 801. In step 805, it is determined whether one cycle has ended or not, and the loop of step 805 is repeated until the result is YES. When one cycle is completed, the process advances to step 806, and it is determined whether or not the serial number mode is set. In this case, the answer is No, so the process advances to step 808. In step 808, it is determined whether the set number of sheets has been completed, and if NO, steps 805-806--
Repeat the loop of 808.

When the set number of sheets is completed, the process advances to step 809, where it is determined whether or not the page mode is set.In this case, since the answer is No, the series of processes is ended.

Therefore, in the date mode, the date is always set in the write register, and the date is written in a predetermined position above the transcription.

Next, the case of page mode will be explained.

It is determined NO in step 800 and YES in step 802.
Since it is judged as S, the process advances to step 803 and the contents of the PAGE register are set in the write register.0For example, if it is immediately after switching to page mode, "1°' is set in the write register.Then, as described above, the contents of the PAGE register are set to 0. Repeat the loop of step 805 until one cycle is completed. After completing one cycle, step 806 to step 808
Then, it is determined whether or not the set number of sheets has been completed. The loop from step 805 to step 806 to step 808 is repeated until the set number of sheets is completed. Step 8 after setting the number of sheets
The process advances to 09 and it is determined whether the page mode is selected.

In this case, since the answer is YES, "1P" is added to the contents of the PAGE register, the value of the PAGE register is incremented, and the processing is then terminated.

Therefore, in the page mode, the same number is always written for the set number of copies of the same original (1° in this case), and when the next copy command is input, steps 800 to 802 Proceed to step 803, and the number added by “l” from the previous time (“2” in this case)
is set in the write register, and "2°" is written on the transfer paper.

Next, the case of the a-th mode will be explained.

When copying is started, the process proceeds from step 800 to step 8.02 to step 804, and 1 is stored in the write register.
``'' is set. Step 806 after completion of one cycle
It is determined whether or not it is the serial number mode, and since the answer is YES here, the process advances to step 807 and the contents of the write register are set to 1.
" is added to become "2°". The loop of steps 808 to 805 to 806 to 807 is repeated until the set number of sheets is completed, and the number written on the transfer paper is incremented every cycle. When the copying for the set number of sheets is completed, the process moves to steps 809 to END and the process ends. Therefore, in the case of serial number mode, numbers are written sequentially starting from 1 for the set number of sheets of the same original. Similarly, numbers are written sequentially starting from 1 for a series of copies.

Next, a two-color mode, that is, a case where the colors of the writing area for characters and the like and the original image area are changed will be explained.

In this case, the written portion is first exposed (at this time, the blank LED 702 is lit) and developed in red. Thereafter, the document is exposed to light using a multiplex copying mechanism (at this time, the portions that have already been written are rendered white by the LED array 701), and the document is developed using a black developer.

FIG. 49 shows a timing chart for two-color mode.

The drum rotation starts with the copy command, and blank L
The ED 702 and the LED array 701 are turned on. After the previous rotation is completed, the LED array 701 is sequentially and selectively turned on while the blank LEDs 702 remain fully lit to form a latent image of a pattern such as a character for a period of time T4. Further, at this time, while the red developing device performs development, if the registration roller is started at an appropriate timing, the characters appear in red at the desired position on the transfer paper. In this sequence, the optical system 45 does not perform scanning, and the lamp 14 does not light up.

Next, the transfer paper on which characters have already been written is stored in the intermediate tray, and the second copying sequence begins. The optical system 45 starts and the lamp 14 lights up. Blank LE at this time
D702, the LED array 701 is turned on after a time T1 has elapsed since the output of the 0-pixel signal, the blank LED 702 is turned off, and furthermore, after the time T4 has elapsed since the last character was written,
The LED array 701 is turned off. When the optical system reaches the inverted position, the lamp 14 turns off and the blank LED 702
, the LED array 701 lights up. When the optical system 45 returns to its home position, one cycle ends.

Moreover, the following configuration can be considered as another embodiment. In the above-mentioned embodiment, the LED array for writing patterns such as characters also served as a black eraser for unnecessary image areas. However, at present, LED arrays with high dot density are
The amount of light is small compared to ED, etc. Therefore, for example, when backing up the optical system, there is a difference in the amount of light irradiated to the drum when the LED array and blank LED are used to erase black, and there is no unnecessary light on the photoreceptor. There may be cases where charges remain. In other words, after continuing the write mode for a long time, it becomes impossible to obtain a proper image.

To solve this problem, an LED array for pattern writing and a blank LED for erasing black may be provided independently.

Figure 50 is a drawing of the vicinity of the drum, where ■ is the drum.

980 is a blank LED for erasing black, and 981 is an LED array for writing. Figure 51 shows the black eraser blank LE.
0980 and a layout diagram of a writing LED array 981. In this example, 99 LEDs are used at a pitch of 2.5 mm.
0s are lined up.

FIG. 52 shows the irradiation area on the drum surface.

The blank LED for blackening 980 is in the range of 991.

In other words, the entire surface of the drum can be irradiated. On the other hand, LED array 9
81 can only irradiate the area 992 in the figure. Here, the case where characters are displayed on the leading edge side of the transfer paper will be explained.

FIG. 53 shows the timing chart.

When the copy starts, the blank LED 980 lights up and the solenoid 706 is energized. After the pre-rotation is completed, the lamp 14 is turned on and the optical system 45 moves forward.

After time T1 has elapsed since the image tip signal -, the blank LED 98
0, the LED array 981 is completely lit at the same time as it is turned off. After a time T5 corresponding to the distance between the blank LED 980 and the LED array 981 shown in FIG. 50 has elapsed, the LED array 981 is sequentially and selectively turned on to start forming a character latent image.

At the time B when writing a predetermined character is finished, the LED array 9
81 is fully lit and the solenoid 706 is turned off. Response time and optical axis of solenoid 706 - LED array 9
LED after the elapse of time T6, which is the sum of the travel time between 81 and 81.
All arrays 981 are turned off. When the optical system reaches the inverted position, the lamp 14 goes out and the blank LED 980 lights up. One cycle ends when the optical system returns to its home position. In this way, by providing a blanking means for blackening and a separate pattern writing means, when an unnecessary image disappears, such as when the optical system moves backward, the drum is irradiated with uniform light and a good image can be obtained.

Moreover, with this configuration, the following can also be done.

As mentioned above, this method uses the multiple copy mode to overlap text and original images. As mentioned above, the amount of light from the LED array tends to be insufficient, so if the process speed is determined based on the performance of the LED array, the specifications of the entire machine will deteriorate.

The above drawbacks can be overcome by changing the process speed during character writing and the process speed during document exposure.

An example of outputting characters on the leading edge of the transfer paper will be described below.

First, the cycle of writing characters is performed at a relatively low process speed, and then the document is exposed at a relatively high process speed and multiple copies are made. Figure 54 shows the timing chart of this process! 1st line opening is blank LE0980
shows a state in which only the irradiation area 992 shown in Fig. 52 is off, and the horizontal line indicates a state in which only the irradiation area 992 shown in Fig. 52 is lit. The drum starts rotating at the same speed, and the blank LE0980 and LED array 981 light up.

At this time, the high voltage output is output at a value for low speed. When the forward rotation is completed, a portion of the blank LED 980 goes out.

After time T5 has elapsed, the LED array 981 is sequentially selectively turned on and begins to form a character latent image. At the 0 point where the output of the predetermined character is completed (after T7 has elapsed), the blank LED 980. L.E.
The D array 981 is fully lit. After 16 hours,
All LED arrays 981 are turned off. The registration roller is turned on at a predetermined timing, and characters are formed on the leading edge of the transfer paper. Once the transfer paper reaches the intermediate tray, the next sequence begins and the drum begins rotating at a relatively high process speed. Also, at this time, the high voltage output is output at a value for high speed. When the pre-rotation is completed, the lamp 14 lights up and the optical system 4
5, the blank LE0980 turns off with only a part remaining after a time T1 has elapsed from the 0th picture ahead where forward movement is started.

”rB = T7 + After T5 time, blank I, ED
All 980 lights go out. This sequence forms a white latent image in the area where characters were written in the first cycle, making it possible to clearly write characters regardless of the original. Then optical system 4
5 comes to the reverse position, the lamp 14 is turned off and the blank L is turned off.
Turn on ED980. After that, the optical system returns to the home position and one cycle is completed.

Furthermore, in the above embodiments, the pattern writing LED was provided only in a part of the image area.

Of course, they may be arranged across the entire image area.

In addition, a mechanical shutter was provided in the slit as a means to block exposure of one image, but this shutter may be located near the photoreceptor, or may be a shutter used with a liquid crystal, or an LED array may be used as a writing light source. Although we used a light source and a liquid crystal shutter, it is also possible to use a light source and a liquid crystal shutter.

Next, the image composition mode will be explained.

In this embodiment, an example will be described in which images are synthesized from an A4 size double-sided document onto one side of an A3 size transfer material.

After setting the original on the RDF 9, press a predetermined key on the operation unit 11 to separate (do not overlap) two images of the double-sided original on the same side of one transfer material from the double-sided original and form images. Set the mode to perform. After selecting the cassette containing the A3 size transfer material, turn on the copy start key.

The original 10 set on the RDF 9 is conveyed and set at an image reference position on the original glass 12. The situation is shown in FIG. 55(a).The original set as shown in FIG. 55(a) performs the same operation as in the multiple copy mode described above and completes the copying operation for the first side. The top 12 originals 10 are conveyed onto the original table again via the switchbacks of paths D, E, and F of the RDF 9. The situation is shown in Figure 55 (
b) As shown in Figure 55(b), the original is A4
Move it by the size, set it, and perform the copying operation as in the second page copying operation described above. That is, after the member 29 attached to the moving optical system unit 45 is detected by the image tip detection sensor 30.

The eraser lamp is turned on for a predetermined time T2 (width of A4 size) to erase the potential of unnecessary portions caused by scanning of the optical system.

After time T2 has elapsed, the eraser lamp is turned off and a latent image on the second side of the document is formed on the photosensitive drum. Intermediate tray 8
The transfer material fed by the paper feed roller 37 is conveyed via the conveyance path G to the front of the registration roller 28. Further, the registration roller 28 is driven after a predetermined time T3 after the image edge detection sensor 30 is turned on, and the transfer material is sent out in the direction of the photosensitive drum l with accurate timing.

As a result, the leading edge of the latent image coincides with the center of the transfer paper, and a composite image is formed. Thereafter, as described above, after the transfer process, the fixing operation is performed to complete the copying.

・Figure 55 explains the case where the characters "A/B" are written on the front and back sides of the original. First, the characters "A 11" are copied on the first half of the transfer material, and then "° The characters "B" are copied on the latter half of the transfer material.

In this embodiment, a composite image is finally formed on the transfer material as shown in FIG. 55(C).

FIG. 56 is a timing chart for performing the above-described image compositing operation. When the copy start key is pressed, the RDF 9 transports the original 10 to a predetermined position on the original glass 12, turns on the main motor 4, and rotates the drum 1. After the original is set at the image reference position, the first copying operation in the multiple copying mode is performed as described above, and then the original is ejected once by RDF (D) and transferred to the original glass 12 via switchback buses E and F. Reset the back side of the original on top. At this time, either set the original at a predetermined time interval from the image reference position and perform the second copying operation in the multiple copy mode as described above, or, as a difference, the eraser lamp will not be used for 12 hours after the image tip signal is generated by the eraser lamp. The lamp is turned on to erase unnecessary charges on the drum and prevent excess toner from adhering, and at the same time, the resist 28 is activated at time T3.

Also, at this time, the optical system performs an A3 size scan, and in the second half of the scan, the original is exposed to light to obtain a composite image.

As explained above, according to this embodiment, the front surface image of the document and the front surface image can be formed on the same side of the transfer paper without overlapping.

In this embodiment, the case where a double-sided original of A4 size is copied onto transfer paper of A3 size is explained, but when copying a double-sided original of other sizes onto transfer paper of other sizes, the eraser lamp and registration roller are also used. A desired copy image can be obtained by appropriately selecting the driving timing.

〔effect〕

As explained above, according to the present invention, it is possible to copy a plurality of original images on the same transfer paper without overlapping them, and the functionality of the copying apparatus can be further expanded. be.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the configuration of an embodiment of a copying machine to which Hon 5?1lJI is applied, Fig. 2 is a block diagram of a circuit that determines process speed, Fig. 3 is a timing chart of the entire device, and Fig. 4 is a timing chart for pre-rotation, Figure 5 is a timing chart for potential control, Figure 6 is a CCD light control,
7 is a timing chart for scanning, FIG. 8 is a timing chart for post-rotation, and FIG. 9-1 is a perspective view showing an embodiment of a copying machine to which the present invention is applied. -2 is a top view of the document a and the table, FIG. 10 is a top view of the operation section unit, FIG. 11 is a block diagram showing the configuration of the display section, FIG. 12 is a block diagram of the human power section, and The figure is a block diagram of the drive circuit for the LED array, Figure 14 is a diagram showing how the LED array is lit, Figure 15 is a color detection circuit diagram of the developing device, and Figures 16-1 to 16-3 are the main A flowchart showing an embodiment of the invention,
Fig. 16-4 is a diagram showing an example of variable-magnification copying with area specification; Fig. 17 is a circuit block diagram of an embodiment of the present invention; Fig. 18 is a timing chart of control pulses;
Figure 9 is a diagram showing the relationship between CVRDATA and lamp lighting voltage, Figure 20 is a diagram for explaining the document detection method, and Figure 2 is a diagram showing the relationship between CVRDATA and lamp lighting voltage.
Figure 1 is a diagram to explain area specification by marking,
Figures 22 to 31 are sequence flowcharts for document detection and area recognition, Figure 32 is a sequence flowchart for dimming, Figure 33 is a diagram showing the relationship between the moving optical system and the photosensitive drum, and Figure 34 is a blank exposure unit. Detailed diagram of
FIG. 35 is a diagram for explaining the slit device, FIG. 36 is a diagram for explaining the irradiation area on the photosensitive drum,
FIG. 37 is a diagram for explaining the state in which patterns such as characters are formed on transfer paper, FIG. 38 is a diagram showing an example of the lighting pattern of the LED array, and FIG. 39 is a drive timing chart of the LED array. FIG. 40 is a diagram showing an example of an operation section of a copying machine, and FIG. 41 is a diagram for explaining the position and direction of writing a pattern on transfer paper. FIG. 42 is a diagram for explaining the display state of the LCD.
3 is a control circuit diagram for pattern writing in this embodiment, FIG. 44 is a time chart showing normal copying operation, and FIGS. 45, 46, and 47 are time charts for explaining pattern writing operation. Charts, FIG. 48 is a control flowchart for pattern writing, FIG. 49 is a time chart for pattern writing in two-color mode,
Fig. 50 is a diagram showing an embodiment in which a pattern writing LED is separately provided, and Fig. 51 is a blank LED, an LED
Arrangement diagram of the array, Figure 52 is a diagram for explaining the irradiation area on the photosensitive drum, Figures 53 and 54 are timing charts for including pattern 3, Figure 55 (a)
, (b) and (c) are diagrams for explaining an example of copying a double-sided original onto different portions on the same side of transfer paper, and FIG. 56 is a timing chart of the composition mode. 1 is a photosensitive drum, 3 is a fixing device, 6 and 7 are developing devices, 8 is an intermediate tray, 18 is a CCD for document detection, and 701 is an LED
Array 7o2 is a blank LED.

Claims (1)

[Claims] In a copying apparatus that forms a duplicate image by exposing an original to light to form a latent image on a recording medium, developing the latent image, and then transferring it onto a transfer paper, a first original image and a second original image are formed. A copying apparatus characterized in that the copying apparatus is configured to expose the first original image and the second original image to different portions on the same surface of a transfer sheet.