JPS61185764A - Image editing device - Google Patents

Abstract

PURPOSE:To use a ten key to facilitate the area designating operation by generating and displaying an upper limit value and a lower limit value of numerical values corresponding to a settable area determined in accordance with the variable magnification between a read image and a recorded image and the size of a recording sheet. CONSTITUTION:A copying machine is provided with a contact glass 1 on which originals are placed and an operation board 42, and image editing is controlled by a microcomputer. The glass 1 is provided with X and Y scales 41x and 41y, and measures including numerical values are formed there. A ten key 44 is provided on the board 44, and display devices DSP1-DSP3 are provided also. Information of the size of the recording sheet is designated by a key 52. The upper limit value and the lower limit value of numerical values corresponding to a settable area determined in accordance with the variable magnification between the read image and the recorded image and the size of the recording sheet are displayed on display devices DSP1 and DSP3, and the area designating operation with the ten key 44 is facilitated.

Description

Detailed Description of the Invention [Field of the Invention] The present invention relates to an image editing device that optically reads a document image, processes it to edit the image, and records it on a predetermined sheet. Regarding the designation of

[Prior Art] In a typical electrophotographic copying apparatus, an eraser can be used to partially extract or erase an electrostatic latent image formed on a photoreceptor. Further, in a digital electrophotographic copying apparatus, a part of one image can be extracted or erased by processing image information converted into a digital signal. When performing such editing processing, it is necessary to specify the area to be processed. As this type of technology, for example, the one shown in Japanese Patent Application Laid-open No. 79670/1983 is known. In this case, a position coordinate reading device is provided on a pressure plate, and position reading and document image reading are performed while the original is attached to the pressure plate. According to this, area information can be automatically generated simply by applying a pen or the like to a desired position on a document. However, the five-position coordinate reading device is very expensive, and it is cumbersome to fix the document on the device.

In order to be able to specify a region without adding special components to this type of device, the region can be specified by direct numerical input from the operator. In other words, since this type of device is equipped with a numeric keypad, numerical values corresponding to each position on the document are entered using the numeric keypad.

However, with such means, the input operation using the numeric keypad must be repeated many times, and the operator must know the correspondence between each position on the document and the numerical value to be input. Therefore, unless the operator is very skilled,
The area setting operation is difficult.

[Object of the Invention] An object of the present invention is to simplify the region designation operation when region designation is performed using an inexpensive input means such as a numeric keypad.

[Structure of the Invention] In order to achieve the above object, the present invention provides upper and lower numerical values corresponding to the settable area, which are determined according to the magnification ratio of the read image and the recorded image and the recording sheet size. Generate a value and display it.

According to this, the operator only has to input a value within the range of the displayed numerical value, so the operation is easy. In other words,
If the size of the recording sheet is equal to the original size x magnification ratio (under normal copying conditions, this condition is met in most cases), the upper and lower limits are the values at both ends of the original. Therefore, the operator can relatively easily know the numerical value at any position on the document from the displayed upper and lower limit values.

Therefore, even if the operator is a beginner, there is no need to read the operation manual of the copying machine and refer to the type of numerical value to be input (for example, in am units or mm units). It is not necessary to know each size (length and width direction).

When performing general editing operations (for example, cutting and pasting images), for example, if you want to extract an area in the lower right corner of a document, the location information that specifies the area includes the position of the edge of the document, that is, the upper or lower limit value. often included. Therefore, in a preferred embodiment of the present invention, this upper limit value or lower limit value is set in advance as an initial value, and if position information is not input, this initial value is automatically set as position information.

According to this, the number of key operations required to input position information can be reduced. For example, suppose that you want to extract a rectangular area touching the right and bottom edges of a document in a device that sets each three-digit value input using a numeric keypad when the set key is pressed.1 In a normal input operation, 12 This requires ten key operations and four set key operations, but if the above procedure is performed, only six ten key operations and four set key operations are required.

However, the copying machine is not used only when the condition of recording sheet size = original size Errors may occur. Therefore, in a preferred embodiment of the present invention, if the document size is specified, the upper and lower limits to be displayed are set in accordance with that information.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the appearance of one type of copying machine embodying the present invention, and FIG. 2 shows its longitudinal section. First, referring to FIG. 1, reference numeral 1 indicates a contact glass for placing an original, 2 a pressure plate for pressing the original from behind, and 42 an operation board.

At the end of the contact glass 1, an X scale 41x extending along the X axis direction indicated by an arrow in the figure and a Y scale 41y extending along the Y axis direction are arranged.

Both the X scale 41x and the Y scale 41y have scales (not shown) that include numerical values that increase in each axis direction with one corner 40 of the contact glass 1 as a reference point (zero point).
is formed. In this example.

The graduations of each scale can be read in units of 1 mm. This will be explained with reference to FIG. 2. Illumination lamps 3. 1st mirror 4. 2nd mirror 5. Third
An optical scanning system including a mirror 6, a lens 7, a fourth mirror 8, etc. is provided. This optical scanning system is driven for reciprocating scanning in the direction of arrow X and in the opposite direction. Note that the illumination lamp 3. The first carriage on which the first mirror 4, etc. is mounted is connected to the second mirror 5. It moves at twice the speed of the second carriage on which the third mirror 6, etc. is mounted.

The reflected light from the original is guided to the surface of the photosensitive drum 9 through an optical scanning system. Around the photoreceptor drum 9, a charging charger 23. Eraser 24° developer unit 10
．． Transfer charger 192 Separation charger 20. A cleaning unit 22 and the like are provided. The photosensitive drum 9 rotates clockwise in this example.

The surface of the photosensitive drum 9 is first charged to a uniform high potential by the charging charger 23. When the high potential surface is irradiated with light from the document, the potential of that surface changes depending on the intensity of the irradiated light, and this causes the surface of the photoreceptor drum 9 to have a potential distribution according to the image, that is, an electrostatic potential. An image is formed.

The areas where the irradiation light is strong, that is, the areas that correspond to the white part of the image, have a low potential.

The areas where the light is weak, that is, the areas corresponding to the black part of the image, have a high potential.

As will be described later, the eraser 24 is composed of a large number of light emitting diodes in this example, and by irradiating light onto the corresponding non-image area or image area to be erased on the surface of the photoreceptor drum 9, the potential of that area is increased. Lower it to white level potential. Therefore, even if the area of the photosensitive drum 9 erased by the eraser 24 is irradiated with light obtained from the black image of the original, the potential of that area is at the white level, and a black image will not be reproduced in that area. . This eraser 24 is arranged along the surface of the photosensitive drum 9 in the direction of arrow Y.

The electrostatic latent image on the photosensitive drum 9 is developed by a developing unit 10. In other words, when passing through the developing unit 10, the black toner particles in the developing unit 10 are attracted to the high-potential parts, and not to the low-potential parts, so that the black toner particles are absorbed according to the potential distribution of the electrostatic latent image. A black and white image is reproduced on the photoreceptor drum 9.

In this example, recording sheets are stored in two paper feed cassettes 11 and 12, and the paper is fed from one of the selected paper cassettes. 13 and 15 are paper feed rollers, 14.16 and 1
8 is a feed roller, and 17 is a registration roller. The leading edge of the fed recording sheet touches the registration roller 17.
The photoreceptor drum 9 is stopped once in contact with the photoreceptor drum 9, and at a predetermined timing synchronized with the rotation of the photoreceptor drum 9 and scanning of the original image, the registration roller 17 causes the image to overlap with the visible image (toner image) on the surface of the photoreceptor drum 9. sent to.

When the recording sheet passes through the position of the transfer charger 19.

The visible image on the photosensitive drum 9 is transferred to a recording sheet.

When the recording sheet passes through the position of the separate charger 20,
The recording sheet is separated from the photoreceptor drum 9 and guided to a conveyance path. When the toner image on the recording sheet passes through a fixing unit 21 disposed on the conveyance path downstream of the photosensitive drum 9, the toner image on the recording sheet is fixed to the recording sheet by the heat.

The conveyance path on the downstream side of the fixing unit 21 branches into three. The upper conveyance path is used for reversing the recording sheet, and the lower conveyance path is used as a return path for performing multiple copy processes. The central conveyance path is the paper ejection path. Which conveyance route is used is determined by the state of the conveyance direction control mechanism 31 provided at the branch point. When the return path is selected, the recording sheet is transported to the intermediate tray 34 by the transport rollers 32 and the transport belt 33, and at a predetermined paper feeding timing, the recording sheet is transported to the intermediate tray 34 by the paper feeding rollers 35. The paper is fed to the registration roller 17 via feed rollers 36 and 18. The reversing path is used to perform double-sided copying and to align the sides of recording sheets to be ejected.

FIG. 3 shows the operation board 42. Referring to FIG. 3, the operation board 42 includes a print start key 43. Numeric keypad, clear and stop key 44, density adjustment key 4
5+ 47 + A E key 46° Interrupt key 482 Magnification down key 49. Magnification up key 50. Variable magnification mode key 51. Recording sheet (paper) size specification key 52. Original size specification key 53, input key 542 editing mode key 55
2 reversing key 562 double-sided key 57 and display unit 58 are provided. The display unit 58 includes a variable magnification display D.
It is equipped with an SPI, a set number display DSP2, and a copy number display DSP3. Each display DSPI, DS
P2 and DSP3 are each equipped with a 3-digit, 7-segment numeric display.

As will be described later, special information is displayed on these displays when an editing area is specified.

The double-sided key 57 is used to select the path of the recording paper, and the inversion key is used to select whether or not to invert the recording sheet. By operating the double-sided key 57 and the reversal key 56, one double-sided mode and composite mode are selected.

Single-sided mode, paper ejection mode, re-duplex mode, re-combining mode, blank page mode, double-sided blank page mode, and additional mode can be specified.

Under normal conditions, duplex mode, composite mode, and single-sided mode can be specified. In the duplex mode, a copy is made on a recording sheet fed from a paper cassette, and the copy is inverted and stored in the intermediate tray 34. Therefore, copying is performed on both sides of the recording sheet.

In the composite mode, the recording sheets are stored in the intermediate tray 34 without being reversed. Therefore, recording is performed multiple times on the same surface, that is, images are combined.

The single-sided mode is a normal mode in which a recording sheet on which a copy image is recorded is immediately ejected.

When recording sheets are stored in the intermediate tray 34, other modes can be specified. In the paper ejection mode, the intermediate tray 34
Feed the recording sheet stored in the machine, copy it to it,
Eject the paper. In the re-duplex mode, the recording sheet stored in the intermediate tray 34 is fed, a copy is made on it, the sheet is reversed, and then the recording sheet is stored in the intermediate tray 34 again. In resynthesis mode,
The recording sheets stored in the intermediate tray 34 are fed, copies are made thereto, and the recording sheets are stored in the intermediate tray 34 again without being reversed. In the blank paper mode, recording sheets stored in the intermediate tray 34 are fed and immediately ejected without being copied.

In the double-sided blank paper mode, the recording sheets stored in the intermediate tray 34 are fed, reversed once without being copied, and stored in the intermediate tray 34. In the addition mode, the recording sheets fed from the paper cassette and copied are stored in the intermediate tray 34 with or without being reversed, making it possible to add the missing number of sheets.

If image editing processing is required, press the edit designation key 55.
Take advantage of. When the edit designation key 55 is pressed, area designation becomes possible. In that input mode, which will be described in detail later,
Use the numeric keypad 44 and input key 54 to enter position information in the X and Y directions.

One editing area can be specified by inputting it.

4a and 4b show a plan view and a longitudinal sectional view of the eraser 24. FIG. Referring to each figure.

This eraser 24 is connected to a printed circuit board 75. case 76,
[Dynamic circuit unit 77 and a large number of light emitting diodes 78
It is. The case 76 has a partition wall 76a with a length of 2 m.
They are formed at equal intervals of m pitch.

A light emitting diode 78 is arranged in each space defined by each partition wall. Specifically, here, 150 light emitting diodes are arranged in a line. Therefore, by using this eraser, an area of 30 cm @ can be divided into minute areas of 2 mm each, and each minute area can be selectively erased.

FIG. 5 schematically shows the electric circuit of the copying machine shown in FIG. 1.

Please refer to FIG. The main control device is a microcomputer (CPU) 80. System controller 81. Counter 82. Read-only memo U (ROM)83. Read/write memo I) (RAM) 84, non-volatile read/write memory (
NRAM) 85° input/output port (Ilo) 87.88, etc. A battery 9 is connected to the power line of the nonvolatile read/write memory 85 via a backup circuit 86.
0 is connected. A power line from a power supply unit 89 is connected in parallel to a battery 90 via a diode. The eraser 24 is connected to the input/output port 87 via the eraser driver 77 . The input/output port 87 is also connected to a separation jam sensor, a double feed detection sensor, a P sensor, a toner sensor, other sensors and switch units, a jam indicator, an operation board (operation panel) 42, and the like. Input/output port 88
includes drivers that drive various motors, lamp regulators that control the lighting lamp 3, fixing heater control unit, high voltage power supply unit, drum heater control unit, servo motor control unit that drives various servo motors, clutch and solenoid drivers, etc. It is connected. A synchronous pulse generator connected to the servo motor control unit outputs a pulse signal synchronized with the rotation of the photoreceptor drum.

Counter 82 is used here to generate control timing for eraser 24. FIG. 6a shows a specific configuration of a circuit including the counter 82 and the eraser driver 77. See Figure 6a. Counter 82 includes two programmable interval timers 93 and 94.

The timers 93 and 94 used here are 8253 (or 8254) manufactured by Intel Corporation.

Simply put, this counter includes three 16-bit counters, and operates in one of six modes depending on the contents of data set in an internal control register. Each mode is 1
It is as follows.

Mode 0: After setting the terminal count mode, the counter output state is low level L. When the value is set in the counter, it starts counting the rear inputs.

When the terminal count is reached, the output state becomes high level and maintains that state.

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

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

Mode 3: Rectangular wave rate generator Same as mode 2, but outputs a rectangular wave with a count number of 1/2 of the set rate value.

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

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

The count input terminals CLKO, CLKI and CLK2 of each of the three counters (0°1.2) of the programmable interval timer (hereinafter abbreviated as timer) 93 and 94 are connected to the output terminal of an oscillator that generates clock pulses of a predetermined period. It is connected. Counter O and counter 1 of timer 93
and each gate terminal GATEO of counter 0 of timer 94
, GATE1 and GATEO are commonly connected to the output terminal 0UT2 of the counter 2 of the timer 94. The gate terminal GATE2 of counter 2 of timer 93 is
is connected to the output terminal ○UTI of counter 1, and timer 9
The gate terminal G of counter 4 of counter 1 is connected to the output terminal 0UTo of counter 0 of timer 94, and the gate terminal GATE2 of counter 2 of timer 94 is connected to the power supply line (+Vc
e). The output terminal of the oscillator is connected to the clock output terminal (CLOCK) via the inverter INVI, and the output terminal ○UTO of the counter O of the timer 93 is connected to the latch output terminal (LATC) via the inverter INV2.
H). Output terminal ○UT2 of counter 2 of timer 93 and output terminal 0U of counter 1 of timer 94
TI is connected to each input terminal of an exclusive OR gate EORI, and the output terminal of the gate EOR1 is connected to a signal output terminal (S-OUT) via an inverter INV3.

Each output terminal (CLOCK) of the counter 82, (LATC
H) and (S-OUT) are respective input terminals (CLOCK) of the eraser driver 77.

(LATCH) and (S-IN). The eraser driver 77 includes 19 integrated circuits (Toshiba TD62801P) IC1 to CI9 having the same configuration.

As shown in Figure 6b, each integrated circuit consists of an 8-bit shift register, an 8-bit latch, a gate, and a driver, and an output enable control terminal ENABL.
E, latch control terminal LATC) I, signal input terminal 5-
It is provided with IN, a clock input terminal CLOCK, a reset control terminal RESET, a signal output terminal 5-OUT, and an 8-bit driver output terminal. Note that an overlined symbol in the figure indicates that the signal line is L active.

The latch control terminals LATC)I of each integrated circuit are commonly connected to the input terminal (LATCH) of the eraser driver 77, and the clock input terminals of each integrated circuit are commonly connected to the input terminal (CLOCK) of the eraser driver 77. ing. Input terminal of eraser driver 77 (S-I
N) is connected to the signal input terminal 5-TN of the integrated circuit ICI, and is connected to each integrated circuit IC2, IC3, IC4, IC5, .
..., ICl3 and IC:19 signal input terminal 5-
IN are connected to each integrated circuit ICI, IC2, rc3 .
IC4, . . . , are connected to the signal output terminals 5-OUT of IC17 and ICl3.

That is, the integrated circuits ICI to ICI9 are connected in series with each other, thereby forming a 152-bit shift register in total. 150 light emitting diodes LED L to LED150 (78) of the eraser 24 are connected to the output terminal of each bit via a resistor, respectively. Note that the last two bits are not used here.

Therefore, at the moment the latch signal appears, the bit holding a high level H (which is inverted at the output of the driver) energizes the light emitting diode, and the bit holding a low level L energizes the light emitting diode. Since it is deenergized, signal line 5
By inputting erase information as 150-bit serial data to -IN and applying a latch pulse when the erase is completed, any area of the eraser 24 can be selectively energized.

The copyable area on the surface of the photoreceptor drum 9 in one copy cycle is expanded and shown in FIG. 7a. Since the photosensitive drum 9 rotates at a constant speed, the position of the surface of the photosensitive drum 9 in the scanning direction (indicated as the document scanning direction in the figure: X) can be expressed in terms of time when viewed from a fixed position. The vertical direction in the figure is the width direction, that is, the Y direction.

For example, in a device that can make A3 size copies.

When copying a B4 size original image, the original image copy area is smaller than the copyable area as shown in FIG. 7a.

In this case, the leading edge erase (full-width erase) is performed in the area from the leading edge of the copyable area to the leading edge of the original image (times T1 to T2), and the area where the original image exists (times T2 to T5) is erased.
) performs site erase (erasing areas other than the width of the original) and erases the area from the rear edge of the original image to the rear edge of the copyable area (
At time T5 to T6), rear end erase (full width erase) is performed. This is also done in most conventional general copiers.

When erasing or extracting a specific area of the original image for an IW collection of images, further erase (
It is necessary to erase the electrostatic latent image.

In other words, FIG. 7a shows the case of area erasing, in which the area P1 to P2 in the width direction (Y direction) is erased at the scanning direction (X direction) position specified by T3 to T4 for one hour. . Since the eraser 24 is arranged to cover the entire area from 0 to M positions along the width direction axis, it is possible to control which area of the eraser 24 the light emitting diodes are energized/deenergized. The erase area in the width direction is determined by .

Further, as described above, since the eraser 24 is given information indicating which region of the light emitting diode to be energized as a serial signal, the erased region in the width direction can also be expressed in terms of time. By controlling the counter 82 shown in FIG. 6a, a signal for energizing the eraser driver 77 can be generated.

FIG. 6C shows the signal timing of each part of the counter 82 for erasing at time T3 shown in FIG. 7A. Furthermore, IC20 and IC21 in FIG. 6C
indicate timers 93 and 94, respectively. 6th
The operation of C will be explained with reference to diagram C. In order to operate this counter 82, it is first necessary to set the programs for each timer 93 and 94. Program setting in this case is performed by the "mode set" subroutine shown in FIG.

In the operating mode, counters 0, 1 and 2 of timer 93 are set to 5, 1 and 1, respectively, and counters 0, 1 and 2 of timer 94 are set to 1, 1 and 0, respectively. At the timing (erasing) of time T3, timer 9
M, 5l-1 and S2 (see FIG. 7a) are set in the count registers of counters O, I and 2 of timer 94, respectively, and PL-1 is set in each of the count registers of counters 0, 1 and 2 of timer 94, respectively. , P2 and 2 (7th
(see figure a).

When the mode setting is completed, the output signal (IC21-0UT2) of the counter 2 of the timer 94 is set to a low level B, and becomes a high level H after counting two pulses. The three counters to which this signal is applied to their gate terminals, timer 93 0.1 and timer 94 0, are triggered and begin counting at the rising edge of that signal.

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

Counter 1 of timer 93 has 81-
Since 1 is set, 51-
At the first pulse, its output signal (IC20-OUTI) is inverted to high level H. Since the counter 2 of the timer 93 to which the signal is applied to the gate terminal is set to mode 1, the output signal is (IC20
-OUT2) is set to low level L.

Counter 0 of timer 94 has 2 in its count register.
Since 1-1 is set, at Pl-1st pulse,
Its output signal (Ic21-ouro) is set to high level H. Since the counter 1 of the timer 94 to which this signal is applied to the gate terminal is set to mode 1, the output signal is output at the falling edge of the next pulse (PLth pulse) when the signal becomes high level H. (IC21-OUTI
) is set to low level L.

When the P2nd pulse appears, the output signal of the counter 1 of the timer 94 (IC21-OUTI) is inverted to high level H, and when the 82nd pulse appears, the output signal of the counter 2 of the timer 93 (IC20-0UT2) is inverted to high level H. When the M#th pulse appears, timer 9
Since counter 0 of No. 3 is set to mode 5, its output signal (IC20-0UTO) has an L of J clock width.
The level pulse appears only once.

Therefore, two output signals (IC20-0UT2 and IC
Signal 5-O which is the inverted exclusive OR of 21-0UTI)
UT includes 0-3t, PL-P2 and 32-M (7)
The high level H remains present for a period corresponding to the number of pulses.

Since this signal 5-OUT is read into the shift register of the eraser driver 77 in synchronization with the clock pulse, the number of these pulses corresponds to the position of the light emitting diode of the eraser 24 connected to the eraser driver 77.

Also, since the high level H of the signal 5-OUT means energizing the light emitting diode, that is, erasing the image of that part, this signal causes the 0-8L, P
The ranges i to P2 and 82 to M are subject to charge erasure.

The operation explained above is T3 to T4 in the X direction and P in the Y direction.
Although it is assumed that the area specified by 1 to P2 is to be erased, it is also possible to extract the specified area and erase the other areas. That is, in the case of extraction, the signal level (H/L) at the timing of Sl-S2 of 5-OUT shown in FIG. 6c may be inverted. This means that the operation of counter 2 of timer 93 is prohibited. In other words, the output signal of counter 2 of timer 93 (IC20-0UT2
) remains at the high level H during the period S1-S2, the level of the signal 5-OUT during that period is inverted with respect to the state shown in FIG. 6c.

Whether to erase or extract the specified area is determined when the program is set (Mode Sera 1-) by timer 93 and 94, and depending on the determination result, the contents of the program change slightly as shown above. . Details will be described later.

When editing an image, it becomes necessary to move a specific area of the image to an arbitrary position. This type of image movement is possible with digital copying machines equipped with large memory capacities.
This can be easily done by data processing. However, since this is not possible with an ordinary copying machine, the following method is used in this embodiment.

Since the rotation of the moving photosensitive drum in the X-axis direction is the reference, the scan start timing of the optical scanning system and/or the sheet supply timing of the registration roller 17 are shifted from the standard timing synchronized with the rotation. In other words, if the scanning start timing of the optical scanning system is advanced, the position of the image formed on the photoreceptor drum 9 will move in the negative direction (to the left in the figure) with respect to the document scanning direction (X) in FIG. 7a. If the image is moved and the scanning start timing is delayed, the position of one image moves in the positive direction (to the right in the figure) with respect to the document scanning direction.

In addition, if the sheet feeding timing of the registration rollers is advanced, the recording sheet will be shifted to a position ahead of the normal position of the image on the photoreceptor, and the image will shift in the same way as when the original scanning start timing is delayed. If the sheet supply timing of the registration rollers is delayed, the image is moved in the same way as when the document scanning start timing is advanced. In this example, when moving the image by a relatively small distance, only the document scanning start timing is shifted, and when the moving distance is large, both the document scanning start timing and the sheet feeding timing of the registration rollers are shifted. ing.

Movement in the Y direction In this example, the position of the lens 7 provided in the optical scanning system is moved in the Y direction.
This is done by moving it along the axis. The principle of this movement is shown in Figure 7b. That is, in FIG. 7b, when the lens is at the position indicated by the solid line, each part of the document A, B, and C
The light emitted from each part of the original reaches the positions A, B, and C on the photoconductor, but when the lens moves to the position indicated by the two-dot chain line, the light emitted from each part of the original A, B, and C reaches the position indicated by the two-dot chain line. , and reach positions A', B'', and C' on the photoconductor, respectively. In other words, by moving the lens, the positional relationship between the image on the document and the image on the photoconductor changes in the Y111 direction. It shifts.

Regarding magnification, as in the past, change the positional relationship between the lens and mirror, adjust the magnification of the entire optical scanning system to W14, and then calculate the reciprocal of the magnification and the scanning speed of the optical scanning system at the same magnification. The optical scanning system scans at a speed corresponding to the multiplication result. Note that when moving the image in the Y-axis direction, the amount of movement of the copy image is as follows: d, the amount of lens movement
Letting the magnification ratio be m, it is as follows.

D=(1,+m) d FIG. 9 shows a schematic operation of the microcomputer (CPU) 80, mainly for erase control.

The operation will be explained with reference to FIG.

Note that the numbers of the processing steps to be explained are shown in parentheses.

When the power is turned on, each part is initialized (1), the status of each input port is read (2), and it is determined whether or not it is operable (3). If it is not ready, the presence or absence of an abnormality is checked (4), and if there is an abnormality, a display indicating the abnormality is displayed (5). After this, until you become ready, (2) - (
3)-(4)-(2)-... or (2)-(3)-
(4)-(5)-(2)--... The processing is performed in a loop.

When Ready is detected (3) Display glue set indicating abnormality (
6), initialize various parameters in the m-semi-mode in predetermined registers (7), turn on the copy ready display (8), and read the status of each part (key switches) of the operation board 42 and the results. Perform processing according to
(9). Check the status of the print start key 43 on the operation board 42 (10) L. If there is no start instruction, then check the status of the edit key on flag (21)
).

This flag is cleared in the initial state.

In that case, return to operation board reading (9) and repeat this operation.

When the edit mode key 55 is operated, either area extraction or area erasure mode is set as the editing mode (
Registers RB and RE, which will be described later, are sent), and at the same time, an edit key-on flag is set. When the edit key-on flag is set, the edit area setting process (22-
32) Execute PR.

In this editing area setting process, first, each coordinate that specifies a rectangular area on the manuscript, that is, the coordinates of the left side of the rectangle (22),
Right side coordinate (23), bottom side coordinate (24) and top side coordinate (
25). When setting each coordinate, the range of numerical values that can be set is displayed. Numerical values are entered using the numeric keypad 44, and each coordinate is set by pressing the input key 54.

Here, check whether the original size is specified (26)
. If there is no specification, the parameters set so far are memorized for later copying operations, the display contents of each display are returned to the normal state (32), and the operation board is read (9).
).

In addition, if the original size is specified, each step (
The process 27-31) is executed to designate the recording area on the recording sheet, that is, the area where the image read and edited from the original document is to be recorded. In this case, each coordinate that specifies a rectangular area on the recording sheet, that is, the left side of the rectangle 4!1 (
27), the right side coordinate (28), the lower side 4% (29) and the upper side m (30) are determined. When setting each coordinate, the range of numerical values that can be set is displayed. Numerical values are entered using the tincture key 44, and each coordinate is set by pressing the input key 54. When this is completed, the magnification ratio and the specified area on the recording sheet are corrected (31) based on the coordinate values input so far so that copying is performed in the most favorable condition.

The detailed processing of the above editing area setting processing PR is explained in the 10th section.
Figure a, Figure 10b, Figure 10c, Figure 10d, and Figure 10.
Shown in Figure e. Further, an example of the correspondence between each area on the original and each area on the recording sheet placed on the contact glass 1 is shown in FIGS. 8a and 8b, respectively.

Below, an outline of each representative symbol (indicating the register name) shown in FIGS. 10a to 10e will be explained.

SX...The length of the document in the X direction) SY...
Length in the Y direction of the original DX... Length size in the X direction of the recording sheet) DY.
... Length in Y direction of recording sheet Xm1n, Xmax, Ymin, Ymax-C・e Values to be displayed Kmin, Kmax, Ks ... Magnification ratio (lower limit value, upper limit value).

Setting value) XI, Yl... Input value for area on document (small) X2. Y
2...Input value for the area on the document (large) R3...Document size (enters the value according to the specification.0 if no specification) RD...Recording sheet size (same as Rs) R.K.
...Input buffer RB, RE...Erase: 0 / Extraction: IK x, K y
...Buffer of variable magnification ratio X3. Y3... Input value of area on recording sheet (small) X4. Y4... Input value of area on recording sheet (large) In Fig. 8a, ARI is contact glass area (readable area: A3 size), AR
2 indicates the original area (B4 size here), the editing area specified by AR3, and in Fig. 8b, AR4 indicates the recording sheet area (A4 portrait in this case), the recording area specified by AR5, and AR6 indicates the area after correction processing. In the recording area, AR7 indicates an unnecessary area.

With reference to each figure, the region setting processing operation will be explained along with an example of the region setting operation.

First, reference is made to FIG. 10a. Register R8 is checked to determine whether or not the original size has been specified. If the document size is specified, 0 and document size SX are set in each register Xm1n and Xnax, respectively.

If the original size is not specified, set X min and X max.
Set O and DX/Ks, respectively. Here, DX/Ks is the recording sheet size converted to the size on the document reading surface. For example, when the original is 84 size and the recording sheet is A4 size, if 0.82 is selected as the magnification ratio Ks, DX/Ks almost matches the value of the original size SX.

X min and X max are output to indicators DSPI and DSP3, respectively. For example, if you specify the original size,
When the original size SX is 364 mm (B4 size), 0 is displayed on the left magnification ratio display rIDsPI, and 364 is displayed on the copy number display DSP3 on the right.

The value of X min is output to the set number display DSP2 in the center, and the contents of Xm1n are set in RK as an initial value.

Check the status of the set key (enter key 54) and the numeric keypad 44, and if the numeric keypad 44 is on, set the value in the register RK, and display the contents on the set number display D.
Set to SP2. A value within three digits is set in register RK. If set key 54 is on, register RK
It is checked whether the contents of are within the range of the lower limit value X min and the upper limit value X max. If it is out of range, register R again
Set Xm1n as the initial value in K, and display DSP2.
Error rEJ is displayed and the process returns to checking the numeric keypad and set key.

In the example of FIG. 8a, the left end coordinates 200 of one editing area AR3 are input from the numeric keypad 44, and the set key 54 is pressed.

If the input value is within the range of Xm1n and Xmax, the contents of register RK are stored in register X1. Therefore, if the set key 54 is pressed without operating the numeric keypad 44, the initial value, that is, the coordinates of the left edge of the document, is entered in the register X1.

The details of the process in step 22 shown in FIG. 9 have been described above.

Next, the register R8 is checked again to determine whether or not the original size has been specified. If the original size is specified, the previously specified X coordinate value X1. and set the original size SX. If the document size is not specified, cents Xl and D X / Ks are added to Xm1n and Xmax, respectively. Here, DX/Ks is the recording sheet size converted to the size on the document reading surface.

Xm1n and Xmax are output to the displays DSPI and DSP3, respectively. For example, if the original size is specified and the original size SX is 364 mm (B4 size), the value of the variable magnification display DSPIEXI on the left (200 in Figure 8a) will be displayed, and the value of the copy number display DSP on the right will be displayed.
364 is displayed in 3.

The value of Xmax is output to the set sheet number display DSP2 in the center, and the content of Xmax (364) is set in RK as an initial value.

Check the status of the set key (enter key 54) and the numeric keypad 44, and if the numeric keypad 44 is on, set the value in the register RK, and display the contents on the set number display D.
Set to SP2. A value within three digits is set in register RK. If set key 54 is on, register RK
It is checked whether the content of is within the range of the lower limit value Xm1n and the upper limit value Xrnax. If it is out of range, register R again
Set Xmax to K as the initial value, and display DSP2.
Error "E" will be displayed and the process will return to checking the numeric keypad and set key.

If the input value is within the range of X min and Xl1ax, the contents of register RK are stored in register X2. Therefore,
If the numeric keypad 44 is not operated, the set key 54
If is pressed, the initial value, that is, the coordinate 3 of the right edge of the document
64 is set in register X2. In the example of FIG. 8a, the right end of the area AR3 to be specified coincides with the right end (364) of the document area AR2, so it is sufficient to press the set key 54 without operating the numeric keypad 44.

The details of the process in step 23 shown in FIG. 9 have been described above.

Next, the register R3 is checked again (see Fig. TOB) to determine whether or not the original size has been specified.

If the original size is specified, each register Ymin and Ym
Set O and document size SY in ax, respectively.

If the original size is not specified, use Xm1n and Xmax.
Set 0 and DY/Ks respectively.

Here, DY/Ks is the recording sheet size converted to the size on the document reading surface. For example, if the 1g document is 34 size and the recording sheet is A4 size, if 0.82 is selected for the magnification ratio Ks, D Y / K
s almost matches the value of the document size SY.

Ymin and Ymax are output to the displays DSPI and DSP3, respectively. For example, if the original size is specified,
In the example of FIG. 8a, 0 is displayed on the left-hand magnification ratio display DSPI, and the original size 257 is displayed on the right-hand copy number display DSP3.

The value of Ymin is output to the set number display DSP2 in the center, and the contents of Ymin are set in RK as an initial value.

Check the status of the set key (enter key 54) and the numeric keypad 44, and if the numeric keypad 44 is on.

The numerical value is set in the register RK, and its contents are set in the set sheet number display DSP2. 3 in register RK
The value within the digit is set.

If the set key 54 is on, it is checked whether the contents of the register RK are within the range of the lower limit value Ymin and the upper limit value YnIax. If it is outside the range, Y min is set as the initial value in the register RK again, an error rEJ is displayed on the display DS'P2, and the process returns to checking the numeric keypad and set key.

In the example of FIG. 8a, the lower end coordinates 50 of the editing area AR3 are
Input from the numeric keypad 44 and press the set key 54.

If the input value is within the range of Ymin and Ymax, the contents of register RK are stored in register Yl. Therefore, if the cent key 54 is pressed without operating the numeric keypad 44, the initial value, that is, the coordinate 0 of the lower edge of the document, is set in the register Y1.

The details of the process in step 24 shown in FIG. 9 have been described above.

Next, the register RS is checked again to determine whether or not the original size has been specified. If the original size is specified, registers Ymin and Ymax respectively.

The previously specified Y coordinate value Y1. and set the original size SY. If the original size is not specified, set Yl and DY/Ks in YIlin and Y[laX, respectively. Here, DY/Ks is the recording sheet size converted to the size on the document reading surface.

Y@in and Ymax are output to the displays DSPI and DSP3, respectively. In the example of FIG. 8a, the Yl value 50 is displayed on the left magnification ratio display DSPI, and 257 is displayed on the right copy number display DSP3. Y+II
Output the value of ax to the set number display DSP2 in the center,
The contents of Ymax (257) are set in RK as an initial value.

Check the status of the set key (enter key 54) and the numeric keypad 44, and if the numeric keypad 44 is on, set the value in the register RK, and display the contents on the set number display D.
Set to SP2. A value within three digits is set in register RK. If set key 54 is on, register RK
It is checked whether the content of is within the range of the lower limit value Ymin and the upper limit value Ymax. If it is out of range, register RK again.
Set Ymax as the initial value, display error rEJ on the display DSP2, and return to checking the numeric keypad and set key.

If the input value is within the range of Ymin and Ymax, the contents of register RK are stored in register Y2. Therefore.

If the numeric keypad 44 is not operated, the set key 54
If is pressed, the initial value, that is, the coordinate 3 of the right edge of the document
64 is set in register Y2. In the example of FIG. 8a, the upper coordinate of the area AR3 to be specified is 150, so
All you have to do is input 150 from the numeric keypad 44 and press the set key 54.

The details of the process in step 25 shown in FIG. 9 have been described above.

See Figure 10e. Whether or not the original size has been specified (step 26 in FIG. 9) is checked by register R8. When the document size is specified, the position on the recording sheet side is set as follows. First, register RE is checked to determine whether the 1 editing mode is extraction or deletion. For extraction, set the register X min to 0, and set Xmax to DX - (X 2 - X 1
) ・Set Kmin.

(X 2 -X 1 ) Kmin is the size in the X direction on the recording sheet side when the extraction area on the document side set by the above process is copied at the minimum magnification.

If K win is 0.5, then Xmax will be 128 in the example of FIGS. 8a and 8b (DX=210).

If deletion is selected, Xm1n is also 0.
and set Xmax to D X S X-Kmin
Set. If K ll1in is 0.5, then
Xmax is the example in Figures 8a and 8b (DX=210)
Then it will be 28.

Xm1n and Xmax are DSPI and DS respectively
Set to P3. Therefore, the example of FIGS. 8a and 8b (
In the case of extraction), 0 is displayed on the left magnification ratio display DSPI, and 128 is displayed on the right copy number display DSP3.

Next, the same process as "left side coordinate input" shown in FIG. 10a is performed. In the example shown in Figure 8b, the left end coordinate of the area to be transferred is set to 50, so the operator can select 50 from the numeric keypad.
, and press the set key 54. In that case, 5
0 (contents of RK) is stored in register X3.

The above is the process of step 27 shown in FIG.

Next, the contents of register RE are checked again.

In the case of extraction, set Xm1n to X 3 + (X 2 - X L ) ・Kmin, and set Xmax to X 3 + (X 2 -
) ・Set Kiax.

If erasing, set X3+SX-Kmin to Xll1in, and set Xmax E X 3 + S X-Kma
Set x.

Therefore, in the example of FIGS. 8a and 8b, if K min is assumed to be 0.5 and KIoax is assumed to be 2.0 (the same applies hereafter), then in the case of extraction, Xm1n and Xmax are respectively
+32 (=50+164X0.5) and 378 (=
50+164x2゜0).

However, if Xmax > DX, set DX to Xmax. In the above example, Xmax (37B)>DX (
210), so Xrnax is updated to 210.

Set X min and X max to display @DSPL and DSP3, respectively. Examples of Figures 8a and 8b (
Extraction), set 1 to each of the displays DSPI and DSP3.
32 and 210 are displayed.

Next, the same process as "right side coordinate input" shown in FIG. 10a is performed. In the example shown in Figure 8b, the right end coordinate of the area to be transferred is set to 175, so the operator can press 1 from the numeric keypad.
75 and press the set key 54. In that case, 175 (contents of RK) is stored in register X4.

The above is the process of step 28 shown in FIG.

Next (see Figure 10d), register RE is checked to determine whether the editing mode is extract or erase.

For extraction, set O to register Ymin and set Ymax
Set DY − (Y2 − Y 1) ・Kmin.

(Y 2 - Y 1 ) Kmin is the size in the Y direction on the recording sheet side when the extraction area on the document side set by the above process is copied at the minimum magnification.

Y+*ax is the example of FIG. 8aliifl and FIG. 8b (DY
= 297) becomes 247.

If erase is selected, Ymin is also 0.
and set Ymax to DY-3Y-Kmin.

Ymin and Ymax are DSPI and DS respectively
Set to P3. Therefore, the example of FIGS. 8a and 8b (
In the case of extraction), O is displayed on the left magnification ratio display DSPI, and 247 is displayed on the right copy number display DSP3.

Next, the same process as "lower side coordinate input" shown in FIG. 10b is performed. In the example shown in Figure 8b, the lower end coordinates of the area to be transferred are set to 175, so the operator can press 1 from the numeric keypad.
75 and press the set key 54. In that case, 175 (contents of RK) is stored in register Y3.

The above is the process of step 29 shown in FIG.

Next, the contents of register RE are checked again.

In the case of extraction, set Ymin to Y3+(Y2-Y1)・Kmin, and set Ymax to Y3+(Y2-Y1)
) ・Set Kmax.

If 7 leaves, Ymin is Y3 + S Y-K
Min is 1-shi, Ymax is Y3+SY-Km
Set ax.

Therefore, in the example of FIGS. 8a and 8b, in the case of extraction, Ymin and Ymax are respectively 225 (=17
5+100X0.5) and 375 (=175+100
X2. Set O). However, if Ymax>DY,
Set DY to Ymax. In the above example, Ymax
(375)>DY (297), so set Ymax to 29
Update to 7.

Set Ymin and Ymax on the displays DSPI and DSP3, respectively. In the example (extraction) of Figures 8a and 8b, 13
2 and 210 are displayed.

Next, the same process as the "upper side coordinate manual" shown in FIG. tab is performed. In the example shown in Fig. 8b, the upper coordinate of the area to be transferred is set to 275, so the operator can select 2 from the numeric keypad.
75 and press the set key 54. In that case, 275 is stored in register Y4.

The details of the process in step 30 shown in FIG. 9 have been described above.

As described above, the operator sets the area on the document to be edited and the area on the recording sheet 1 to which it is to be transferred. However, it is difficult for an operator to set the transfer area on the recording sheet at an optimal position (eg, the center of the paper). Therefore, in this embodiment, the following correction process (
Step 11) in FIG. 9 is performed to reset the transfer area on the recording sheet to an optimal state.

The details of the process are shown in FIG. 10e. This will be explained with reference to FIG. 10e. First, the contents of register RE are checked. For extraction, Kx is (X4-X3)/(X2-X
I) and set Ky to (Y 4-Y 3)/(Y 2-
Y 1 ”).

Also, for erasing, set DX/SX to Kx.

Set DY/SY in Ky. In other words, the transfer area on the recording sheet and the editing area on the manuscript (extraction area or entire manuscript)
The scaling factors in each axis (X and Y) that match the size of are set to Kx and Ky, respectively.

Then, the contents of Kx and Ky are compared and the smaller one is selected. In other words, if Kx<:Ky, then Kx is the actual magnification ratio K
s, otherwise set Ky to the actual magnification Kg.

Next, the coordinates of the area on the recording sheet are corrected. This correction is performed only on the axes that were not subject to correction in the magnification change correction described above. That is, K x < K V
If it is determined that: The value of Kx is set to Ks, and the Y-axis coordinate is corrected as follows according to the contents of register RE.

For extraction: Y3=Y3+(Y2-Yl)・(1,-Ks)/2Y4
=Y4-(Y2-Yl)・(1-Ks)/2 For deletion: Y3-=Y3+SY・(1-Ks)/2Y 4 =
Y4SY・(1-Ks)/2Kx
When it is determined that ≧KV: For extraction: X3 = X3 + (X2-Xi) ・(L-K s)/
2X4=X4 (X2 XI) ・(1-K s
)/For 2 deletion: X3=X3+SX ・(1-Ks)/2X 4=
X4-SX.(1-Ks)/2 or more is step 31 shown in FIG.

In step 26, when the above processing is completed, including the case where it is determined that the yK document size is not specified,
2. X3. X4. Yl, Y2. Y3. Set Y4 and Ks as parameters for editing processing, and display magnification ratio display D.
The previously set magnification ratio Ks is displayed on the SPI, the predetermined set number is displayed on the set number display DSP2, the initial value 0 is displayed on the copy number display DSP3, and the display is returned to its original state.

After this process, the magnification ratio of the copying machine is determined by the parameter Ks
The timing of the copy operation, that is, the timing of image reading and recording sheet feeding, is set according to the area shift in the X-axis direction (values corresponding to Xi, X3, and Ks), and the lens position is set according to the Y-axis direction. Area deviation (YL, Y3
and a value corresponding to Ks). Further, the eraser control information is set according to all of these parameters.

See FIG. 9. Print start key 4 in standby mode
When 3 is pressed, steps (10) - (11) (17
) −(1a) −(19) −(2o) −(8)
-(9)-..., or step (10) -(11)
−(12)−(13) −(14) −(t5) =
(ts) −(17) −(18) −(19) −(
20) - (13) - (14) - . . . and the copy process is performed. “Start cycle processing J
In (12), processing necessary to start the copy process is performed. Most of the copy process, including control of the eraser 24, is performed in "1 copy process J (13). That is.

The timing pulse (not shown) output every minute rotation of the photosensitive drum 9 is constantly counted, the timing is grasped by checking the value, and the "mode set" subroutine shown in FIG. 11 is executed. Control is performed according to each timing.

Please refer to FIGS. 6C, 7a and 11.

Note that FIG. 6c only shows the state at timing T3 in the erase mode, and in FIG. 7a, S2 represents the distance or pulse difference with respect to Sl, and P2 represents the distance or pulse difference with respect to Pl. Please be careful.

The eraser 24 is controlled at the tip erase timing T1.
It starts from. At this timing T1, the timer 93
Set the operation mode of counters 0, 1.2 of , set the number 2. As a result, a pulse is cursed at the output terminal 0UT2 of the timer 94.

The counter 0 of the timer 93 is triggered at the rising edge, and after M pulses, the output terminal 01J of the timer 93 is triggered.
A pulse appears on TO. While the counter 0 of the timer 93 is counting, the output terminal 0UT2 of the timer 93 and the output terminal ○UT1 of the timer 94 are both at a high level H, so all bits of the shift register of the eraser driver 77 are not activated. The level is written. That is, until the timer 93 or 94 is reset next time, erasing is performed over the entire width of the photoreceptor.

At timing T2, the contents of the erase mode register RB are checked. If it is 1, that is, extraction, it is sufficient to continue the full-width erase, so the process returns without doing anything. When register RB is 0, that is, in the erase mode, M, 5L-1, and S2 are set in the count registers of counter 0, counter 1, and counter 2 of the timer 93, respectively, and the count register of counter 2 of the timer 94 is set. Set 2.

As a result, a pulse appears at the output terminal 0UT2 of the timer 94. At the rising edge of the pulse, counters 0 and 1 of timer 93 are triggered. As a result, at the falling edge of the next clock pulse, the timer 93 outputs the output terminal 0UTI.
goes to a low level L, and then, after 81-1 clock pulses, its output terminal 0UTI goes to a low level H. The counter 2 of the timer 93 is triggered by this rising edge, and the output terminal 0UT2 of the timer 93 is set to a low level L at the timing of the next clock pulse, that is, Sl.

This state continues until the counter 2 of the timer 93 reaches the set value S2. During the period when this output terminal 0UT2 is at a low level L, that is, during 5l-52, the output terminal ○UTI of the timer 94
maintains a high level H.

Therefore, the signal line 5-OUT is at a low level, that is, an erase release level appears between 81 and S2.

After that, the output terminal 0UT2 of the timer 93 becomes a high level H, so that the erase level (H) is again cursed on the signal line 5-OUT. This signal is latched inside the eraser driver 77 by a latch signal appearing at the output terminal UT1 of the timer 93 at the Mth clock pulse.

In other words, in the erase mode, at timing T2, the entire document width (Sl-32
) is excluded from erasing, and therefore only site erasing is performed.

At timing T3, the contents of the erase mode register RB are checked. As a result, if register RB is O1, that is, in erase mode, counters 0, 1, 2 .
The counters 0°1 and 2 of the timer 94 are set to M and 3, respectively.
1-1. S2. Set PL-1, P2 and 2.

As a result, as described above and shown in FIG. 6c, only the areas corresponding to timings S1 to P1 and P2 to S2 are excluded from erasure, and erase and site erase are performed for the specified range of areas P1 to P2. Signal (S-OU
T) is generated.

When the content of the erase mode register RB is 1, that is, the extraction mode, the counter of the timer 93 is set to 0. The count registers of counters 0, 1 and 2 of the timer 94 are filled with M and P, respectively.
Set L-1, P2 and 2.

When the setting is completed, a pulse appears at the output terminal 0UT2 of the counter 2 of the timer 94, and its rising edge causes the
The counter 0 of the timer 94 is triggered, and from the falling edge of the next clock pulse, the output terminal ○UTO of the counter 0 of the timer 94 goes to a low level L during the Pl-1 clock pulse. After counting Pl-1 clock pulses,
When the output terminal ○tJTo of the timer 94 returns to the high level H, the counter 1 of the timer 94 is triggered by the rising edge of the output terminal ○tJTo, and the output terminal 0U of the timer 94 is output from the fall of the primary clock pulse until timing P2.
T1 is set to low level B.

In this case, counter 2 of timer 93 does not operate.

The output terminal 0UT2 is at a high level H during timing 81 to timing S2. Therefore, the output terminal OUT of timer 94
A signal similar to the signal from 1 is connected to signal line 5-OUT.
appears in In other words, the signal 5-OUT is output so that erasing is canceled only between timings P1 and P2, and only the designated rectangular area remains.

At timing T4, the contents of the erase mode register RB are checked as in the case of timing T2, and timers 93 and 94 are set according to the result. As a result, in the erase mode, a signal (S-OUT) is generated that performs erasure release on the areas 81 to S2 and site erase on the areas 0 to S1 and 82 to M.

In the extraction mode, a signal for erasing across the entire width is generated.

At timing T5, the count register of counter 0 of the timer 93 is set to M, and the count register of counter 2 of the timer 94 is set to 2. After this mode setting, a pulse appears at the output terminal 0UT2 of the timer 94, and at its rising edge, the counter 0 of the timer 93 is triggered, and after 1M clock pulses, a latch pulse appears at the output terminal 0UT0 of the timer 93. In this case, the output terminal 0UT2 of the timer 93 and the output terminal OUT2 of the timer 94
Since UT 1 is always at a high level H (erase level), the erase activation level is set in all bits of the latch of the eraser driver 77.

Therefore, the entire width (rear end) is erased.

FIGS. 12 and 13 show two variations of the invention. These outline the portions corresponding to the editing area setting process PR shown in FIG.

In the embodiment shown in FIG. 12, the area setting on the recording sheet side (steps 47, 48, 49, 50.51) is performed after the area setting on the document side (steps 41, 42, 43, 44). This is only possible if the original size is specified and extraction is selected.

Even if the document size is specified, if the erase mode is selected, the area setting process on the sheet side is skipped. The other operations are the same as those in the previous embodiment.

In the embodiment shown in FIG.
), specify the left side coordinates on the recording sheet side (66) and specify the right side coordinates on the recording sheet side (67). In other words, in this embodiment, the official magnification ratio is determined by positioning the recording sheet side in the X direction, and after determining that magnification ratio, the lower side is positioned in the Y direction.Therefore, there is no need to position the upper side. In the magnification ratio setting process at step 68, the ``recording sheet side size H/LL document extraction area suspension'' (however, each size is only in the X direction) is set as the magnification ratio.

In the above embodiment, if the document size is not specified when setting the document side area, the document size is calculated backwards from the recording sheet size and the magnification ratio. That is, a process may be performed in which the size is compared with the maximum size of the original document and the smaller one is used as the result (display value).

[Effects] As described above, according to the present invention, a value determined according to the information on the size of the recording sheet and the magnification ratio is displayed as information on inputtable values, so the area can be specified numerically using a numeric keypad or the like. input operations become easier.

[Brief explanation of drawings]

FIG. 1 is a perspective view of one type of copying apparatus embodying the present invention, and FIG. 2 is a longitudinal sectional view of the copying apparatus shown in FIG. 1. FIG. 3 is a partially enlarged plan view showing the operation board 42 of the copying machine shown in FIG. FIGS. 4a and 4b are a plan view and a longitudinal cross-sectional view of the eraser 24, respectively. FIG. 5 is a block diagram showing the electrical circuit configuration of the copying machine shown in FIG. 1. FIG. 6a is a block diagram showing the specific configuration of the counter 82 and eraser driver 77 shown in FIG. 5, FIG. 6b is a block diagram showing the configuration of the editing circuit rc1 shown in FIG. 6a,
FIG. 6C is a timing chart showing signal states of each part of the counter 82 at a certain timing. FIG. 7a is a plan view showing the relationship between the copyable area on the photosensitive drum and the area included therein. FIG. 7b is a plan view showing the optical positional relationship between the original, the lens, and the photoreceptor. FIG. 8a is a plan view showing each area on the document reading side and their coordinates, and FIG. 8b is a plan view showing each area on the recording sheet side and their coordinates. FIG. 9 is a flowchart showing the general operation of the microcomputer 80 shown in FIG. 10a, 10b, 10c, 1Od, and 10e are flowcharts showing details of the process PR shown in FIG. 9, and FIG. 11 is a flowchart showing the mode set subroutine. FIGS. 12 and 13 are schematic flowcharts showing modified examples of the present invention, respectively. 1: Contact glass 2: Pressure plate 3: Illumination lamp 4: First mirror 5: Second mirror 6: Third mirror 7 Lens
8: Fourth mirror 9: Photosensitive drum 10: Developer unit 11. 12: Paper feed cassette 13. 15: Paper feed roller 14. 16, 18: Feed roller 17: Registration roller 19: Transfer charger 20
: Separation charger 21: Fixing unit 22: Cleaning unit 23: Charging charger 24: Eraser 31: Conveyance direction control mechanism 32: IIIf [Feed roller 33: 11 Feed belt 34: Intermediate tray 42: Operation board 43 Start to Niblin 1 Key 44: Numeric keypad (numerical input means) 52: Recording sheet size specification key (size input means) 5
3: M draft size specification key 54: Input key 55 = Edit mode key 56: Reverse key 57: Double-sided key 58: Display unit 77: Eraser driver 78, LHDI~LED 150: Light emitting diode 80: Microcomputer (control means) 82: Counter 91: Original 92: Specified area 93.94: Programmable interval timer DSP
I: Magnification ratio display (numerical display means) DSP2: Number of copies set display DSP3: Number of copies per copy display

Claims (6)

[Claims] (1) Image forming means comprising an image reading means for reading a document image and an image reproducing means for recording the image read by the image reading means or an edited image thereof on an arbitrary recording sheet; Displaying numerical information Numerical display means; Numerical input means for generating numerical information; Size inputting means for inputting recording sheet size information; and information from the size inputting means regarding the magnification ratio between the read image and the recorded image in the image forming means. generating a lower limit value and an upper limit value in accordance with the above, displaying the lower limit value and upper limit value on the numerical display means, and performing predetermined processing on the image information of the area specified by the numerical value input from the numerical input means; An image editing device comprising: control means. (2) When one position of the area is input from the numerical input means, the control means displays a value corresponding to the input value as either the lower limit value or the upper limit value. The image editing device described in (1). (3) The control means sets either the lower limit value or the upper limit value as an initial value, and if there is no numerical input from the numerical input means, automatically sets the initial value as area information. An image editing apparatus according to claim (1). (4) The numerical display means includes a first display means for displaying a lower limit value, a second display means for displaying an upper limit value, and a third display means for displaying a set value. The image editing device described in section 1). (5) The image reproduction means forms an electrostatic latent image corresponding to the recorded image on a predetermined charge carrier, visualizes it, and transfers it to a predetermined recording sheet, and the control means controls the image area set to be edited. The image editing apparatus according to claim 1, further comprising an electrostatic latent image erasing means for erasing an electrostatic latent image in a portion corresponding to the image. (6) The control means includes an edit mode selection means, and when it is in one state, it erases the image inside the area surrounded by each coordinate corresponding to each numerical value input from the numerical input means, and when it is in the other state, The image editing device according to claim 5, wherein when the above condition occurs, the image outside the area surrounded by each coordinate is deleted.