JPS61246775A - Copying device - Google Patents

Abstract

PURPOSE:To make it possible to page a copy printed on both sides at a proper position by providing a page printing input means and a page position input means. CONSTITUTION:When an ON flag for specifying page printing, a microprocessor 80 indicates a CPU 241A to read out a page printing position obtained by a position register processed by a page count setting subroutine and numerical information indicated by a page register and the CPU 241A inputs read contents to a liquid crystal driver 245 to control the light transmission/nontransmission of a picture exposing shutter. Since one side of respective copies is bound as a volume in the copies printed on both sides, pages printed on the backs of respective copies are hidden in the filed part is pages are printed on the same positions of the front and rear sides of respective copies. When double-sided copy is specified, position changing processing is executed, respective segment electrodes of a liquid crystal shutter 244 are selected by the 1st position information and numerical information indicating the page number on the front side and the 2nd position information and numerical information on the rear side respectively and then light transmission control voltage is applied, so that copies paged easily on proper positions can be obtained.

Description

Detailed Description of the Invention ■Field of the Invention The present invention projects light corresponding to the optical image of an original onto a photoreceptor to form an electrostatic latent image, which is then developed to form a visible image on a recording sheet. Regarding the copying device of the transfer type, although it is not intended to be limited to these, it is possible to expose the photoreceptor area outside the yXX area to erase the development of the extra area, record only a part of the original image, etc. The present invention relates to an improvement in an erase device that performs erasing processing for image editing.

2. 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. An erase device is provided to perform such document area extraction or editing processing. In the simplest conventional mode, a plurality of shutters, which are associated in advance with the document image area (size) on the photoconductor determined by the recording paper size and/or document size that can be set for copying and the copying magnification, are placed between the erase light source and the photoconductor. one or more shutters are selectively inserted between the erase light source and the photoreceptor based on the set recording paper size and/or original size and copying magnification, and the shutter area is left unexposed. As a method, the unexposed area is exposed to original image light. In this case, the recording paper size, manuscript size, and copying magnification are limited. Also,
Obtain a copy by erasing any area on the original.

It is difficult to perform editing copying in which an image of another document is formed by copying once again to the erased area (this time, extracting the area corresponding to the erased area and erasing the other parts). Therefore, recently, a light emitting diode array has been used as an erase light source (for example, Japanese Patent Application No. 1987-008710).

When using a light emitting diode array, it is possible to extract (or erase) and copy a desired area, for example, using a 3 square rectangular area as the minimum unit.

However, even the smallest unit that can be set with a light-emitting diode array, such as 31 squares, may be too large for setting areas for erasing outside the original image or image extraction (erase) editing when copying at an arbitrary magnification. When actively using an eraser to print characters such as letters, there is a problem that the minimum unit is too large. Also, J! There is a problem in that the photodiode array has many and complicated wiring connections.

For example, a light-transmissive liquid crystal plate having a segment electrode array capable of expressing characters, etc. is inserted between the erase light source and the photoreceptor, and selective voltage application control of the segment electrode array is necessary. improved by doing
Erase control of an arbitrary area and projection of a single character image can be controlled. According to this, characters, sentences, etc. that are not included in the original can be printed on the original in one copy cycle. That is,
You can specify the position of the blank area of the copy and add pages there.

By the way, in double-sided copying, copies are made on both sides of a recording sheet, and the created copies can be considered to be bound on one side of the sheet. That is, it is necessary to change the designation of the page print position between the front side and the back side of the copy. For example, if a copy with pages printed on the lower right of the copy on both the front and back sides is bound on the left side (relative to the front copy) and made into 11 copies, the pages on the back side will be hidden in the binding margin. Therefore, there is an inconvenience that the operator has to respecify the printing position of the page when copying to the front side (first side) and the back side (second side) of the recording sheet.

■Purpose of the Invention The first object of the present invention is to provide a copying apparatus that can page at appropriate positions in double-sided copies by setting erase areas in finer units, and the first object is easily achieved. A second object of the present invention is to provide an erase device that can be easily designed for easy wiring connections and has a compact design.

(2) Structure of the Invention In order to achieve the above object, in the present invention, the surface of the photoreceptor is exposed to light after charging and before development. An erase light source arranged in the width direction of the photoconductor; a liquid crystal shutter located between the erase light source and the photoconductor and having light transmission control electrodes divided and arranged in the width direction; a light transmission setting voltage and a light transmission control voltage applied to each of the light transmission control electrodes; Liquid crystal energizing means for selectively applying an opaque setting voltage; Reversing sheet feeding means that transfers a visible image onto the first side of the recording sheet and then guides it to the photoreceptor using the second side as the transfer surface; Memorizes the page number page number storage means; pattern generation means for generating character pattern information corresponding to the number of pages stored by the page number storage means; and
When the first surface of the recording sheet becomes the transfer surface, a light transmission control electrode corresponding to the first position information and the character pattern information generated by the pattern generation means is selected, and the liquid crystal biasing means is
The application of the light non-transmission setting voltage to the selected light transmission control electrode and the application of the light transmission setting voltage to the other light transmission control electrodes are instructed, and when the second surface of the recording sheet becomes the transfer surface, the second A light transmission control electrode corresponding to the position information and the character pattern information generated by the pattern generation means is selected, and the liquid crystal energizing means is applied with a light opaque setting voltage to the selected light transmission control electrode. The structure includes a page number recording control means for instructing the application of a light transmission setting voltage to the control electrode.

According to this, pages are printed on the first side of the recording sheet with the first position information, and pages are printed on the second side of the recording sheet with the second position information. Location information is at the bottom right of the sheet.

If the second position information indicates the position of the bottom left of the sheet, even if this copy is bound on the left side (relative to the first side) and compiled, the printed page will not be hidden in the binding margin. No, all you have to do is set the second position information so that the printed pages overlap when looking through the other side from one side of a single-sided copy. The position information must take into account the direction in which the recording sheet is reversed within the copying device. Generally, however, in a copying device, a recording sheet with a copy on the first side is reversed in a predetermined direction to make a double-sided copy. Since it is being done, the first page is printed! i! (first position information) can be seen on the second page to know which position corresponds to the second page. For example, in a copying machine that performs double-sided copying by reversing the recording sheet in the transport direction, if the transport direction is horizontal, the first position information is a position on the right side of the horizontal central axis (the top and bottom positions are When the second position information is set to (irrelevant), the second position information is a symmetrical position on the left side with respect to the central axis. That is,
Page print position information on the first side of the recording sheet (first position information) can be converted to obtain page print position information on the second side (second position information).

Since such position conversion is automatically performed within the copying apparatus, the operator only needs to specify the page print position on the first side of the recording sheet, which is easy to set.

In addition, the segmented liquid crystal unit can be formed using normal liquid crystal panel manufacturing technology to control the control electrodes for controlling light transmission and non-transmission by dividing them into small segments and integrating them with the lead leads, making wiring connections easy and compact in design. It becomes possible.

That is, since the extraction leads and the segment electrodes are integrated and continuous, the number of electrical connection points is significantly reduced, and the reliability and ease of manufacturing of the device are increased.

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

FIG. 1 shows an external appearance of an embodiment of the present invention, FIG. 2a shows a schematic view of the internal end, and FIG. 2b shows an enlarged view of elements around the photoreceptor drum. First, referring to Figure 1, l
2 is a contact glass on which the original is placed, a pressure plate 2 presses the original from above, and 42 is an operation board. At the end of the contact glass 1, the coordinate origin and X,
In order to show an overview in the Y-axis direction, an X scale (minimum unit: IIIn+) 41x along the yX document scanning direction X and a Y scale (minimum unit: low) 41y along the Y-axis direction are arranged. . The X scale 41x and the Y scale 41y are both marked with numerical values that increase in each axis direction with one corner 40 of the contact glass 1 as a reference point (zero point).

Referring to FIGS. 2a and 2b, below the contact glass l there is an illumination lamp 3. 1st mirror 4. 2nd mirror 5. An optical scanning system consisting of a third 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. In addition, in order to keep the optical path length constant, the first carriage (99:
FIG. 2c) shows the second mirror 5. It moves at twice the speed of the second carriage (not shown) on which the third mirror 6 and the like are mounted.

The image light from the original is transmitted to the first mirror 4. The light is guided to the surface of the photosensitive drum 9 through an optical system composed of a second mirror 5, a third mirror 6, a lens unit 7, and a fourth mirror 8. An image exposure shutter 200 is arranged between the fourth mirror 8 and the photosensitive drum 9. This shutter 200 is used for copying and erasing in character print mode, which will be described later!
(Eraser) 24 is provided to prevent the erase exposure area in the character print mode from being exposed by one image light.

Around the photosensitive drum 9, a charging charger 23, an eraser 24 . Developer unit 10. Transfer charger 1
92 separation charger 20. Cleaning unit 22
Equipped with etc. 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 one-image light of the original, the potential of that surface changes depending on the intensity of the irradiated light due to a photoelectric phenomenon, and this causes the surface of the photoreceptor drum 9 to change depending on the density of the image. A potential distribution, or electrostatic latent image, is formed. Portions where the irradiation light is strong, that is, portions corresponding to the white of the image, have a low potential, and portions where the light is weak, that is, portions that correspond to the black of the image, have a high potential.

As will be described later in 5, the eraser 24 is comprised of a rod-shaped cathode ray tube and a liquid crystal shutter in this example, and selectively irradiates light onto the non-image area or the image area to be erased on the surface of the corresponding photoreceptor drum 9. .

Lower the potential of that part to bring it to its own level.

Therefore, even if the area of the photoreceptor drum 9 that has been erased by the eraser 24 is irradiated with light obtained from the black image of the original, the potential of that area will be at the white level, and the black image will not be reproduced in that area. In addition to this, in the text character print mode, the eraser 24 controls the transmission of light to add text characters to a specified area on the document, brings the text character part to a black level, and erases the limited area around it. Performs character printing processing with the self level as .

The electrostatic latent image on the photosensitive drum 9 is developed by a developing unit IO. That is, when the black toner particles inside the developing unit 10 pass through the portion of the developing unit 10, the black toner particles inside the developing unit 10 are attracted to the high potential portion, and 11! Since the electrostatic latent image is not attracted to the low-level parts, a black and white image corresponding to the potential distribution of the electrostatic latent 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. These paper feed cassettes are equipped with detection marks that indicate the size of the recording sheets they accommodate, and the size is detected when they are installed. 13 and 15 are paper feed rollers, 14°, 16 and 18 are feed rollers, and 17 is a registration roller. The fed recording sheet is stopped once with its leading edge in contact with the registration rollers 17, and is moved onto the photoreceptor by the registration rollers 17 at a predetermined timing synchronized with the rotation of the photoreceptor drum 9 and the scanning of the original image. It is fed so as to overlap the visible image (toner image) on the surface of the drum 9.

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 transport path is used for reversing the recording sheet, and the lower transport path is used for reversing the recording sheet.

It is used as a return path for multiple copy processes. The central conveyance path is the paper ejection path. Which transport route to take is determined by the transport direction # set at the branch point.
It is determined by the state of the control mechanism 31. 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. Feed roller 3
The paper is fed to the registration roller 17 via rollers 6 and 18. The reversing path is used to perform double-sided copying and to align the sides of recording sheets to be ejected.

FIG. 2c shows the first carriage 99 section on which the illuminating lamp 3 is mounted in some detail. On the first carriage 99, an arm SA of the scale holder is attached in a binary manner in a direction perpendicular to the plane of the paper. These arms SA are located outside the end of the illumination lamp 3. Carriage 99 is on standby! l! (Home position: HP), a translucent Y-axis scale 100 is disposed above the arm SA. This scale 100 is pressed against the top plate of the copying machine by two support arms 101 at the front and rear (in a direction perpendicular to the plane of the paper). Support arm 101 is pivotally attached to shaft 102 . A pin is fixed to the lower end of the support arm 101, and this pin is pulled to the right by a tension coil spring 104. This spring force applies a counterclockwise rotational force to the arm 101, and the arm 101 moves the scale 100 upward. is being lifted up.

The solenoid 1 is attached to the pin engaged with the spring 104.
03 plunger is engaged. When the solenoid 103 is energized, it pulls the plunger to the left, thereby
Rotate the arm 101 clockwise against the spring 104.

When the solenoid o3 is energized when the first carriage 99 is in the home position (shape S in Fig. 2c), the arm 101 rotates clockwise, thereby causing the scale 1
00 descends and gets on arm SA. When the carriage 99 is driven in the scanning direction X in this state, the scale 100 moves together with the carriage 99. In this embodiment, when position data is input, the solenoid 103tI is energized, the illumination lamp 3 is turned on at low intensity, and the carriage 99 is driven at a low speed in the scanning direction X in response to a scanning instruction from the operator.

The scale 100 is provided with two sets of graduations 100a and 100b, as shown in FIG. 2d.

The first scale is 300mm long from the image origin (equivalent to the length of the short side of A3 size), with scale lines at 2mm intervals, and every 5 scales are 0.10, 20. ...A numerical value of 290 is attached. This first scale is used for erasing the image within the specified area, so to clearly distinguish it, the area on the first scale side of the scale reference line is colored "blue" and is marked as "nakazuke". It is stamped with.

The second scale 100b has the same unit division as the first scale 100a, but the value of the 1M point is 300, and every 5 scales is 31
0,320. ...A numerical value of 600 is attached.

This first scale is used for erasing images outside the specified area (extracting images within the specified area), so in order to clearly distinguish this, the area on the second scale side of the scale reference line is " It is colored red and has the words ``sleepover'' printed on it.

The eraser 24, a cross-section of the eraser 24 is shown in FIG. 4a.
is a long rod-shaped cathode ray tube 24 extending in a direction perpendicular to the plane of the paper.
0. A reflecting mirror 242 with a parabolic cross section, and a filter 2 that matches the spectral distribution of the projected light to the characteristic spectrum of the photoreceptor.
43. It is composed of a liquid crystal plate (liquid crystal shutter) 244, a liquid crystal driver 245, and the like.

The cathode ray tube 240 has an extremely thin filament wire (cathode) placed in the center and covered with a cylindrical wire mesh (acceleration grid), and these are bonded to a transparent electrode film on the inner surface of the tube and a fluorescent film on top of it. This is a fluorescent light emitting tube enclosed in a glass tube.

The liquid crystal shutter 244 has two rows (A
This is for printing single characters arranged in rows (columns 1 and 2) and for controlling erase areas, and segment electrodes and lead electrodes integrally continuous with the segment electrodes are printed on a transparent substrate. Group electrodes each having a length of several segments are similarly arranged in the width direction of the photoreceptor on a light-transmitting substrate that faces the segment electrodes with a liquid crystal film in between. The segment electrodes, continuous lead electrodes, and group electrodes are connected to the liquid crystal driver board via a flexible printed circuit board. A liquid crystal driver 245 is mounted on the liquid crystal driver board.

When the Y-axis scale 100 is placed on the arm SA, the first graduation 100a and the second graduation 100b (7
A conical protrusion 5Aa2 is formed on the arm SA so that the end (0,300) of one scale line coincides with one (there are two arms SA, front and rear, each with a protrusion).
Further, truncated conical holes 100cl and 100c2, which have a small diameter on the front side and a large diameter on the back side, are bored at both ends of the Y-axis scale. When the solenoid 103 is energized, the Y-axis scale 100 descends onto the arm SA.

At this time, the protrusion 5Aa2 enters the hole 100C2, and the Y-axis scale 100 is positioned in the Y direction. As a result, the Y-axis scale accurately matches the erase area of the eraser 24.

FIG. 5 shows an outline of the electric circuit of the copying machine shown in FIG.
Please refer to FIG. The main control unit is a microcomputer (CPU) 80. System controller 81. Read only memory (ROM) 83° read/write memory (RAM)
84. Non-volatile read/write memory (NRAM)85. It is composed of input/output capo-1-(Ilo) 87.88, etc. A battery 9o is connected to the power line of the nonvolatile read/write memory 85 via a backup circuit 86. A power line from a power supply unit 89 is connected in parallel to the battery 90 via a diode, and the battery 90 is floating. The input/output port 87 has
In addition to the eraser control unit 241 and the image exposure shutter control unit 82 connected to it, there are also 9 over-jam sensors, a double feed detection sensor, a P sensor, a toner sensor, a home position sensor for the carriage 99, and other sensors and switch units. Jam indicator, operation board 4
2nd grade is connected.

The input/output port 88 includes a driver for driving various motors, a lamp regulator for controlling the lighting lamp 3, a fixing heater control unit, a high voltage power supply unit, a drum heater control unit, a servo motor control unit for driving various servo motors, a clutch & A solenoid driver, etc. is connected.

FIG. 3 shows the operation board 42. Referring to FIG. 3, the operation board 42 includes a print start key 43. Numeric keypad 44. Clear and stop key 45. r, 4 key 4
4', set number display 46, copy number display 472
Interrupt key 482 Interrupt indicator 49. Paper cassette selection key 50. Sheet size indicators 51, 53. Paper feed selection display 52° 54, magnification adjustment keys 55U, 55D, magnification display 56, copy mode B (text character print mode)
Selection key 57S, mode B display 57L.

Copy mode A (synthetic copy mode) selection key 58S, mode A display 58L2 fractional page (page... of the total number of pages) print designation key 59S9 fractional page print display 59
L2 page print designation key 60S, page print indicator 60
L9 page print rank! 1 designation key 61S 1 page print position indicator 61L.

~61 L4, page print orientation designation key 62s9 page print orientation display 62Lt + 62L2 t scale print magnification designation key 63S1 magnification designation display 63L,
Scale print designation key 64s, scale print designation display 64L, fixed pattern print information selection key 6
5S, information selection display 65L, fold print designation key 6
6S, signature print designation display 66L2 double-sided copy designation key 67S1 double-sided copy designation display 67L, movement designation keys 70+x, 70-x, 70+y and 7o-y, movement amount display 71 XI 71 yp toner end indicator 72. Jam indicator 73. A paper end indicator 74, a scan designation key 105S for designating scale scanning for area reading, and a scan designation display 105L are provided.

When mode A (composite copy mode: multiple transfer) is specified with the copy mode A selection key 58S, the recording sheet that has been fixed in the first copy is conveyed to the return path and stored in the intermediate tray 34, and then transferred to the second copy. In the second copying, the intermediate tray 34 is automatically selected as the paper feeding tray, and recording is performed again over the previous recording sheet. In this way, mode A has two stages: the first stage is canceled when the first copy is completed, and the second stage is canceled when the second copy is completed (no designation). In this case, when this key 58S is operated at the end of the first copy (first stage canceled: second stage), the first stage is set again.

The recording sheet that has been fixed is conveyed to the return path again and stored in the intermediate tray 34. Therefore, by operating the key 58S in the second stage state, any number of images can be superimposed. Therefore, mode A indicator 58
L is "white lamp on".

The three states of mode A, 1st stage, 2nd stage, and no designation, are displayed according to the 3 states of "red lamp on" and "red lamp off". In addition, in the state of mode A with no designation, copy mode is displayed. Each time the A selection key 58S is operated, the first stage and the unspecified state are switched back and forth.

Image editing processing (delete an area of the first document in mode A,
If you need a composite copy in which an area of the second original is inserted, press the copy mode A selection key 58S to specify mode A, and then press the scan designation key 105 to specify the area. Become. In the manual mode, details will be described later, the operator drives the scale 100 in the exposure scanning direction and the return direction using movement designation keys 70+x and 70-X, stops at the X position to be designated, and attempts to designate it. Scale the Y position to 10
Read on the first scale of 0 (double side image deletion when cleaning the inside) or the second scale (when cleaning the outside: image extraction), enter the read value using the numeric keypad 44, and after manually pressing the numeric keypad, press the "," key 44. 'Press. This operation.

This is done for two diagonal points (vertices) of the rectangular area to be specified.

In this case, when the first scale is used, image deletion within the designated area is automatically set, and when the second scale is used, image deletion outside the designated area is automatically set. The numerical information entered from the numeric keypad has three digits each, and is displayed on the set number of copies display 46 and the number of copies per copy display 47.

If you need the character print mode (composite copying in which one area of the original is erased in mode B and a fixed pattern such as text or marks is inserted there), press the copy mode B selection key 57S to select mode B. Specify.

In this case as well, area designation is performed in the same manner as in the image editing process described above.

In this character print mode, printing a single character and copying an FfX draft are executed in the same process, so the details are described later, but the original is The print area of the characters is shielded from the image light. For this reason, 1. For example, when adding a pattern to a photographic image or a picture image, it is impossible to superimpose a document image and a fixed pattern such as text characters (OR of image components) without erasing the background. In such a case, the mode F
Mode A and mode B may be used together. Namely.

A copy of the original image is made in mode A, this copy is re-fed, and a fixed pattern is printed in mode B. Alternatively, if you want to print first, specify mode A and mode B at the same time, and when refeeding paper, use normal copying (however.

Setting the second stage of mode A (described later) may be performed.

In the normal copy mode in which mode A and mode B are not designated, these movement designation keys 70+x.

70 x p 70 +y and 70-y are used to adjust the area outside the image area (erase area) in recording paper size area units.

The movement amount indicators 71x and 71y display numerical values of the cumulative deviation amount obtained by operating the movement designation key.

Page print 1-designation key 60S is used to designate the number of pages to be printed. When the numeric keypad 44 is operated while this key 60S is pressed, the page printing is performed with the number inputted using the numeric keypad 44 as the starting page, which is updated when the original is replaced.

The fractional page print designation key 59S is used to designate page printing in the form of fractions. When the numeric keypad 44 is operated while this key 59S is pressed, a page is printed in which the number inputted using the numeric keypad 44 becomes the denominator of the fraction, and the number of document changes becomes the numerator of the fraction.

The page print position specification key 61S sets the print position of page 1,
It is designated as one of the four corners of the recording paper, and 1
Every time you make a mouth movement, the display (lighting up) changes from one of the indicators 61L1 to 61L4 to the next one, so that 1 display is displayed! Page printing on (lower garment, bobbin thread, upper cloth, upper row) is specified.

The page print orientation designation key 62S is used to designate the orientation of page number printing, and can select one of vertical orientation and horizontal orientation. Note that the printing direction of this page number is vertical in the Y-axis direction.

The scale print designation key 64S is used to designate printing of scales on recording paper. When scale printing is designated by this key 64S and the scale print magnification designation key 63S, which will be described next, is not input, the scale of the scale to be printed is printed at the set copying magnification.

The scale print magnification designation key 63S is a key for inputting the magnification of the scale to be printed, and if a magnification is input using the numeric keypad 44 while holding down this key, the manual value of the numeric keypad 44 is set as the scale magnification.

The fold section print designation key 66S is used to designate printing of a fold mark at the center of the recording paper. When folded section printing is specified, "r0" is printed in the upper and lower margins of the center of the recording paper in the feeding direction.

The character information selection key 65S is used to select one of a plurality of sentences stored in advance in the eraser control unit (241 in FIG. 4b) connected to the eraser 24. If you operate the numeric keypad 44 while holding down the key 65S, the text specified by the numerical value entered with the numeric keypad 44 will be printed.
1, the eraser control unit 241 has a microprocessor 2 that controls the entire control unit.
41A, RAM 24 LD for temporary storage, ROM 241 E in which fixed pattern information such as characters to be written and control information are stored in advance, input/output interfaces 241G, 241H.

2411, a data bus connecting these, and a decoder 241G that generates a liquid crystal segment electrode activation signal from data from the input/output interface.

It consists of a bidirectional buffer 241F and a synchronization circuit 241B for interfacing with the microprocessor 8o of the main control section (FIG. 5).

The liquid crystal shutter 244 of the eraser 24 has 4 [
Two rows (A
column and B column) segment electrode array. When a non-transparent energizing voltage is applied to each segment electrode, the liquid crystal in that portion becomes non-transparent, blocking light from the cathode ray tube 241 to the photoreceptor drum 9. These are energized in two control modes by information from the microprocessor 80 of the main control (FIG. 5).

First, use the normal erase mode (Erase 1 of the specified area for erasing outside the document area and erasing images within the document area.
In image extraction (erase outside the specified area), the selected segment electrodes in both A and B rows are activated simultaneously, as shown in FIG. 4d. The energizing time 2T is the time during which the surface of the photosensitive drum moves by one dot (1/4 [mm]). Mode for printing character information (Mode 8)
9-page print, etc.), as shown in Figure 4c,
Row B, which is located downstream of row A, is energized with a delay of T time from the energization timing of row A, thereby making the dots smaller and increasing the M resolution of characters and the like.

One letter (including numbers for summer) has a vertical m dot and a horizontal m dot.
The segment electrode energizing voltages shown in FIGS. 4c and 4d are generated in synchronization with the drum synchronization pulse, which appears at one pulse per movement (T) of one dot on the surface of the photoreceptor. When printing a 0-character character, the character (i'! image) written on the photoconductor by column A moves to the position of column B by the rotation of the photoconductor drum 9, so the written information in column B is It is assumed that the A column write information is delayed by T. In the case of the erase mode, the write information in column A and the write information in column B are the same, and are updated to the next line every two synchronization pulses.

Since an electrostatic latent image of a character can be formed on the photosensitive drum 9 by the functions of the eraser 24 and the liquid crystal shutter 244, it is possible to print text or the like that is not on the original on the recording sheet.

By the way, if the electrostatic latent image of the character is irradiated with the electrostatic latent image by the image light of the document, the latent image may be neutralized. For this reason, an image exposure shutter 200 is provided. That is, the image exposure shutter 200 blocks the reflected light of the document projected onto a rectangular area surrounding the latent image of the character.

This image exposure shutter 200 has almost the same configuration as the liquid crystal shutter 244 of the eraser 24, but its purpose is to block the light reflected from the original image in the rectangular area, and there is no energization control like in the character print mode. Its entire configuration and control operation are simplified. That is, the image exposure shutter 200 is composed of translucent segment electrodes with a density of 1 [dot/m+w], and its control unit 82 does not have character information or text information.

The image exposure shutter 200 is connected to a liquid crystal driver 77 shown in FIG. 6a, which driver 77 is connected to a control unit 82.
It is controlled based on data from a microprocessor 80 of the main control section (FIG. 5). The electrical operation is similar to that of the liquid crystal shutter 244, but the activation timing is delayed by the time required for the character latent image formation portion of the photoreceptor to move to the exposure position.

The image exposure shutter 200 is installed in the optical path of the document scanning light, and selectively energizes the transparent segment electrodes based on information from the main control section (FIG. 5) to selectively block the document reflected light.

For example, the diagonal seat IN (Sl・T2) (S
2. In the area of the recording sheet determined by T5).

When character printing in the area determined by diagonal coordinates (PI, T3) - (P2.T5) is set on the operation panel, the T3-74 section in the scanning direction corresponds to the PL-P2 section in the copy width direction. (PI, T3) - (P2.T
Image exposure of the area determined by the coordinates of 5) is blocked. Note that in this area, required text and the like will be printed by the eraser 24, that is, the one-image exposure shutter 200 is set in print mode (page print).

The bias is controlled by scale print, character print).

FIG. 6a shows a specific configuration of a circuit including the control unit 82 and the image exposure shutter driver 77.

See Figure 6a. Control unit 82 is equipped with two programmable interval timers 93 and 94. The timers 93 and 94 used here are
It is 8253 (or 8254) manufactured by Intel Corporation.

Simply put, this timer has three built-in 16-bit counters, and operates in one of six modes depending on the content of data set in an internal control register. Each mode is as follows.

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

Mode 1: Programmable One Shot Each timer's gate input functions as a trigger input in this mode. If there is a trigger input.

A wash 1-pulse (L active) of a preset clock length, starting from the next clock, appears at the output.

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

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

Mode 4: Software trigger S1-robe When the mode is set, the output is at a high level H.

Counting of the clock input is started by setting a value in the count register, and a pulse (L active) of one clock interval is outputted only once by counting up.

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 for the I clock interval becomes low level L only once during terminal counting.

The counting input terminals CL-KO, CLKI, and CLK2 of each of the three counters (Oll 2) of the programmable interval timer (hereinafter abbreviated as timer) 93 and 94 have the following values:
The output terminals of the oscillators that generate clock pulses with a predetermined period are commonly connected to each gate terminal G of counter O and counter 1 of timer 93 and counter 0 of timer 94.
ATEO.

GATE 1 and GATEO are commonly connected to the output terminal 0UT2 of counter 2 of timer 94. The gate terminal GATE2 of counter 2 of timer 93 is
is connected to the output terminal 0UT1 of the counter 1 of the timer 9.
Gate terminal GATE 1 of counter 1 of 4 is timer 94
is connected to the output terminal 0UTO of the counter 0 of the timer 9.
4, the gate terminal GATE2 of counter 2 is connected to the power supply line (
The output terminal of the 0 oscillator connected to +Vce) is connected to the clock output terminal (CLOCK
), and the output terminal ○U of counter 0 of timer 93
TO is connected to the latch output terminal (L
ATCH). Timer 93 counter 2
The output terminal 0UT2 of the counter 1 of the timer 94 and the output terminal 0UTI of the counter 1 of the timer 94 are connected to each input terminal of the exclusive OR gate EOR1, and the output terminal of the gate EOR1 is connected to the signal output terminal (S-OU
T).

Each output terminal (CLOCK) of the control unit 82.

(LATCH) and (S-OtJT) are respective input terminals (CLOCK) of the eraser driver 77.

(Connected to LATCT() and (S-IN).The eraser driver 77 includes 38 integrated circuits (TD62110IP manufactured by Toshiba) with the same configuration.
Equipped with IC38.

The configuration of the ICI is shown in Figure 6b. The ICI consists of an 8-bit shift register, an 8-bit latch, a gate, and a driver, and an output enable control terminal ENABLE.
, latch control terminal [, ATCH.

Signal input terminal 5-IN, clock input terminal CLOCK,
Reset control terminal RESET, signal output terminal 5-OUT
and an 8-bit driver output terminal. For each driver output terminal.

The light-transmitting segment electrodes of the image exposure shutter 200 are connected to each other via resistors. Other IC2~IC
38 has exactly the same configuration, but IC3B 4
Two driver output terminals are not used. In this,
An overlined symbol indicates that the signal line is L active.

Latch control terminal LATC of each integrated circuit ICI to IC38
H are commonly connected to the input terminal (LATCH) of the shutter driver 77, and the clock input terminals of the respective integrated circuits are commonly connected to the input terminal (CLOCK) of the shutter driver 77. The input terminal (S-IN) of the liquid crystal driver 77 is connected to the signal input terminal 5-IN of the integrated circuit ICI, and each integrated circuit IC2, IC3, IC
4, . . . , signal input terminals 5-IN of IC37 and IC38 are each integrated circuit ICI in the previous stage.

IC2, IC3, . . . are connected to the signal output terminals S-○UT of IC36 and IC37.

In other words, the integrated circuits ICI to IC38 are connected in series with each other, thereby forming a shift register with the number of bits equal to the dot density times the maximum width of copying. In this example, the shift register is 300 bits. There is.

Therefore, if the light shielding information is input to the signal line 5-IN as serial data of the number of bits equal to the dot density times the maximum copying width, and a latch pulse is applied when the data is completed, serial-to-parallel conversion is performed.

The bit holding a high level H (inverted at the output of the driver) energizes the segment electrode.

Since the bit holding the low level L deactivates the segment electrode, any region of the maximum copy width can be selectively left unexposed.

in one copy cycle. The copyable area on the surface of the photosensitive drum 9 is shown expanded in FIG. 7a. Since the photoreceptor drum 9 rotates at a constant speed, the position of the surface of the photoreceptor drum 9 in the scanning direction (indicated as the original scanning direction in the figure: X) when viewed from the fixed position is.

It can be shown in time. The vertical direction in the figure is the width direction, that is, the Y direction.

For example, when copying a B4 size original image in an apparatus capable of making A3 size copies, the original image copying area becomes smaller than the copyable area as shown in FIG. 7a. In this case, in the area from the leading edge 41 of the copyable area to the leading edge of the original image (time T1 to T2), leading edge erase (full width erase) is performed.
, perform site erase (erase areas other than the document width) in the area where the document image exists (times T2 to T5),
In the area from the rear end of the original image to the rear end of the copyable area (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 region of a document image for image editing (synthetic copying), it is necessary to further erase (erase an electrostatic latent image) within the region of the document image. That is, FIG. 7a shows the case of erasing an area, and the scanning direction (X direction) specified by 1 hour T3 to T4 is shown.
Erase the area P1 to P2 in the width direction (Y direction) at the position ・Since the eraser 24 is arranged to cover the entire area from position 0 to M along the axis in the width direction, the eraser 24 Which region of the throat should the segment electrode be energized/deenergized?
By controlling , the erase area in one width direction is determined. In this case, a signal instructing to erase the site and a signal instructing to erase the specified area are combined. Conversely, in the case of extraction of a designated area, there is only a signal instructing erasing outside the designated area, and there is no signal instructing site erase.

In the case of character printing, page printing, or scale printing, the one-image exposure shutter 200 is operated in the same way as the erase control of the eraser 24 in order to non-expose the print area (block the image light). However, in the case of the eraser 24, the segment electrodes are controlled to transmit light in the erase area, but in the image exposure shutter 200, the segment electrodes are controlled to be non-transparent in the non-exposure area. Since information indicating whether to energize the segment electrodes in a region is provided, the exposure cutoff region in the width direction can also be expressed in terms of time. By controlling the control unit 82 shown in FIG. 6a, the liquid crystal driver 77
can generate a signal to energize.

In this case, the signal for energizing the liquid crystal driver 77 is
If there is a single designated area, the signal will only be used to block the image exposure of the designated area, similar to the eraser image extraction described above, but if there are multiple designated areas and/or in other printing modes. When multiple signals are combined, multiple signals are combined. For example, when text is printed in a designated area and a scale is printed on the periphery of the recording sheet, a signal that blocks image exposure in the area where the scale is printed and a signal that blocks image exposure in the specified area are combined. This signal is generated at time T as shown in FIG. 7a.
It becomes approximately equal to the eraser control signal at 3. Therefore,
Although there is a difference in the values, the signal patterns are the same, so the seventh
The operation of each part of the control unit 82 for image exposure cutoff will be explained using figure a. The signal timing shown in figure 6C (in this case, Te3
and Te3 refer to timers 93 and 94, respectively). In order to operate this control unit 82, it is first necessary to set the mode of each timer 93 and 94. To take an example of mode cellar 1-, at timing T3, the operation modes of counters 0, 1, and 2 of timer 93 are set to 5, 1, and l, respectively, and counter 0 of timer 93 is set to 5, 1, and l, respectively.
, 1 and 2 count registers M and 5l, respectively.
-1 and S2 (see Figure 7a) set; timer 94
Each operating mode of counters 0, 1 and 2 is set to 1.
．． Pi-1 and P are set to 1 and 0, respectively, to the count registers of counters 0.1 and 2 of the timer 94.
2 and 2 (see Figure 7a). However, in this case, please note that the differences between the respective areas are set as these values.

When the mode setting is completed, the output signal (Te3-0υT2) of the counter 2 of the timer 94 is set to a low level L, and becomes a high level H after counting two pulses. The three counters to which this signal is applied to their gate terminals, 0.1 of timer 93 and 0 of timer 94, on the rising edge of that signal.

It is triggered and starts counting operation.

Here, since counter 0 of timer 93 is set to mode 5, the output signal (Te3-OLITO) 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 (Te3-0UTI and Te3-O
UTO) is set to the lower bevel J17L.

The counter l of the timer 93 is set to 51- in the count register.
Since 1 is set, 51-
At the first pulse, its output signal (Te3-0UTI) is inverted to high level H. The counter 2 of the timer 93 has that signal applied to its gate terminal.

Since mode 1 is set, the output signal (Te3-0UT2) is set to a low level at the fall of the next pulse (S1th pulse) after the signal becomes a high level H.

Counter 0 of timer 94 has P in its count register.
Since l-1 is set, at Pl-1st pulse,
Its output signal (Te3-0υTO) is set to 1 (high level). 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 (Pi-th pulse) after which the signal becomes high level H. (Te3-OUTI)
is set to low level L.

When the P second pulse is cursed, the output signal of the counter 1 of the timer 94 (Te3-0υTl) is inverted to high level H, and when the S second pulse appears, the output signal of the counter 2 of the timer 93 (Te3-0υT2 ) appears, and since the counter O of timer 93 is set to mode 5, the output signal (Te3-0υTo) receives one L-level pulse of one clock width. only appears.

Therefore, two output signals (Te93-0UT2 and Te3
-0υri) signal 5-OUT which is the inverted exclusive OR of
, a high level H is cursed for periods corresponding to the pulse numbers of 0 to Sl, PI to P2, and S2 to M.

Since this signal 5-OUT is read into the shift register of the liquid crystal driver 77 in synchronization with the clock pulse, the number of these pulses corresponds to the position of the segment electrode of the image exposure shutter 200 connected to the driver 77. Furthermore, the high level H of the signal 5-OUT means that the segment electrode is energized, that is, the exposure of that part is cut off.
-P2 and the range from 82 to M are subject to image exposure blocking.

When blocking image exposure only in a designated area.

The timing in the X direction is T3-T4, and the timing in the Y direction is P1-P.
All you have to do is activate the image exposure shutter corresponding to step 2.
If the counter 2 output of timer 93 is prohibited, PI to P2
In the case of the eraser 24, if you want to erase the designated erase area shown in Figure 7a, you can obtain the S-0UT signal that is at H level only during All you need to do is get the signal, and conversely, if you want to extract that area, you can just inhibit the output of the counter 2 of the timer 93. However, in this case, the difference is that the liquid crystal shutter is made to transmit light by the H level signal. .

As shown in FIG. 8, a predetermined area 92 of a document 91 placed on the contact glass 1 is divided into
tx2 and two Y coordinate information yl.

When specifying by specifying y2, specify area extraction/erasure (by eraser 24) for each coordinate, and consider the combination of logical product (AND) and logical sum (OR) of the two coordinate systems. Figure 9a.

Figure 9b, Figure 10alii, Figure 10b, Figure 11a.

There are eight types of area designation patterns shown in FIG. 11b, FIG. 12a, and FIG. 12b.

That is, FIGS. 9a and 9b respectively.

FIGS. 10a and 10b show patterns obtained by logical AND and OR of erasure of the area x1 to x2 and erasure of the area yl=y2, and FIGS. 10a and 10b show patterns.

Figures 11a and 11b show patterns obtained by the logical product and logical sum of the area deletion of x1 to x2 and the area extraction of y1 to y2, respectively. Figures 12a and 12b [i4 are the patterns obtained by the logical product and logical sum of the deletion with the area deletion of yt-72, and the area extraction of xl-x2 and the area extraction of y1 to y2, respectively. ,
It shows a pattern obtained by logical product and logical sum regarding erasure.

In addition, if we do not take into account the combination of logical products and logical sums of two coordinate systems, there are 512 patterns in total, but the probability that a special pattern will be used is small, and there are many patterns. If there are many types, there is a possibility that the operator will make a mistake in operation, so in this embodiment, only two patterns, the pattern shown in FIG. 9a and the pattern shown in FIG. In the case of designation (Elimination of: Nakazuke), the pattern in Figure 9a,
In the case of area extraction (deletion outside the specified area: sleepover), the first
It is assumed that the patterns shown in Figure 2b are used.

When performing a W collection of images, it becomes necessary to move images in a specific area 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 photosensitive drum 9 will change.

If you move in the negative direction (to the left in the figure) with respect to the original scanning direction (X) in Figure 7a and delay the scanning start timing, the image position will be in the positive direction (to the right in the figure) with respect to the original scanning direction (X) in Figure 7a. )
Move to.

Furthermore, if the sheet supply timing of the registration roller 17 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 be If the movement is performed and the sheet supply timing of the registration rollers 17 is delayed, the movement of one image will be performed in the same way as when the document scanning start timing is advanced. In this example, when moving an image by a relatively small distance, only the document scanning start timing is shifted, and when the moving distance layer becomes large.

Both the document scanning R start timing and the sheet supply timing of the registration roller I7 are shifted.

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 solid line position, the light emitted from each part A, B, and C of the original is.

The lenses reach positions A, B, and C on the photoreceptor, but when the lens moves to the position indicated by the two-dot chain line, each part of the document A, B
The light emitted from C and C passes through the optical path indicated by the two-dot chain line and reaches positions A'' I3 j and C on the photoreceptor, respectively.In other words, by moving the lens, the image on the document and the image on the photoreceptor are The positional relationship with the image is shifted in the Y-axis direction.

Regarding magnification, as in the past, we change the positional relationship between the lens and mirror, adjust the magnification of the entire optical scanning system, and then calculate the difference between the reciprocal of 1 magnification and the scanning speed of the optical scanning system at 1 magnification. Multiplication is performed, and the optical scanning system scans at a speed corresponding to the multiplication result. The amount of movement of the copy image when moving the image in the Y-axis direction is as follows, where d is the amount of lens movement and m is the variable magnification.

D= (1+m)d Figures 13a, 13b, 13c, 13d, 13e, 13f, 13g, and 13h show the characters, etc. of the microcomputer (CPU) 80. This figure shows an outline of operations mainly for setting operations for printing and image compositing. The operation will be explained with reference to each episode. In addition,
The processing step numbers to be explained are shown in parentheses 6. 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 it is operational or not (3). ). If it is not ready, check whether there is an abnormality (4), and if there is an abnormality, set a display indicating the abnormality (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), the display indicating the abnormality is reset (6), various parameters in the standard mode are initially set in the predetermined registers (7), the copy ready display is set (8), and the operation board 42 is reset. Read the status of each part (key switches) (9). Check the status of the print start key 43 on the operation board 42 10a);
If there is no start instruction, then the state of the numeric keypad 44 is checked (21a).

If there is no input operation on the numeric keypad 44, the process proceeds to FIG. 13b, and the switch 58S (mode A) on flag and the switch 57S (mode B) on flag are checked (24). This flag is cleared in the initial state, but if any key-on flag is present, the Ig collection (mode A) or character print (mode B) is instructed, so proceed to step (25) and clear the scan key-on flag. Check. This flag is also cleared in the initial state, but if the scan key-on flag is present, editing area designation is instructed, so the process proceeds to the designated area reading control shown in FIG. 13c.

However, when there is no key-on flag for both 57S and 58S, the movement designation key 'to+xs 7o-XI70+y
and checking the operation of 70-y (90. in Figure 13b).
92, 94 and 96), and if none of the movement designation keys is on, check the status of the other keys (described later), and if they are not on, return to reading the status of the operation board 42 (9). , repeat this process. In other words, when no key is operated, (9) - (10)
-(21a) (24) (90) (
92) (94)-(96)-・・・・・・-(15
3-■)-(9)-..., the same process is repeated in a loop, resulting in an input waiting loop waiting for key human power.

When the movement key 70 +
Step (99) after waiting (99) for
). Similarly, when the movement key 70-x is pressed, after step (92), the values of parameters T2 and T5 are each decreased by l (93), and the minute time dT1
After waiting for a period of time (99), the process returns to step (9). When movement key 70+y is pressed, step (94)
Next, the values of parameters S1 and S2 are each increased by 1 (95), and the process waits for a minute time dTl (95).
After performing step (9), return to step (9). Movement key 7
When 0-y is pressed, in step (96), the values of parameters S1 and S2 are each decreased by 1 ('
17) After waiting for a minute time dTt (99), return to step (9).

That is, in this case, if the move designation key is operated in (edit and/or print non-instruction S>), the parameter T2.
T5. The values of Sl and S2 can be updated. These parameters are ``JJK'' with reference to Figure 7a.
This corresponds to the copy area for the original image. Therefore, by operating any of the movement designation keys, you can erase the tip,
The area where the site erase and rear end erase are performed is adjusted.

Although not shown in the first drawing, as these parameters T2 and T5 are updated, the image movement in the X direction, that is, the scanning start timing of the optical scanning system is updated, and the parameters S1 and S2 are updated. Along with the update, the image is moved in the Y direction, that is, the lens 7 is moved in the Y direction. The amount of movement is displayed numerically on movement amount indicators 71x and 71y on the operation board 42.

* When the mode 8 designation key 58S is pressed, it is detected in step (116) of FIG. 13f. As mentioned above, mode A is specified in two stages, and the stage is detected and changes depending on whether the switch 58S is turned on or not, and whether there is recording paper in the intermediate tray 34. In other words, when the switch 58S has no on flag and is 117a), mode A has not been specified in the previous process, so the key 5
8S input sets the switch 583 on flag and lights up the white lamp indicating the 1st stage on the mode A display 58L (119) ; switch 583 on flag is present (1
In the case of 17a), since mode A was specified in the previous process, the presence or absence of a recording sheet in the intermediate tray 34 is checked (117b), and if there is a recording sheet, the mode A indicator 58L lights up. Turn off the red lamp that indicates the second stage and turn on the white lamp that indicates the first stage.119)
;Switch 583 with on flag and intermediate tray 34!
If there is no record sheet, it is the first stage (117a, 1
17b) Since the mode A M removal instruction has been input, the white lamp indicating the first stage that is lit on the mode A display 1158L is turned off (118).

Note that in the initial state, the switch 583 on flag is reset and there is no recording sheet in the intermediate tray.

When the switch 585 on flag is set, the process proceeds to step (25) after step (24), where the scan key 105 on flag is checked. scan key 10
The 5-on flag is set by operating the scan designation key 105S while the switch 588 on-flag is set (switch 573 with the on-flag will be described next); however, this key is an alternate switch, and the scan key 105 can be set manually. The set/reset state of the on flag is reversed (not shown), and at this time, the erase set flag, which will be described later, is cleared.

** When the mode B designation key 57S is pressed, the 13th
It is detected at step (120) in the figure, and the set/reset state of the switch 575 on flag is reversed (121-
123), that is, the mode B designation key 578 is an alternate switch, and each time the mode B designation key 578 is pressed, the switch 573
The set/reset on flag turns green again.

When the switch 578 on flag is set, the process proceeds to step (25) after step (24), where the scan key 105 on flag is checked. In this case as well, when the scan designation key 105S is operated while the switch 573 on flag is set, the set/reset state of the scan key 105 on flag is reversed.
An erase set flag, which will be described later, is cleared (not shown).

*** Switch 583 on flag or switch 58
When there is an S-on flag and a scan key-on flag is set, the movement designation keys 70+ and 70-x are activated in steps (24) to (25) in FIG. 13b and then in steps (26) and (36) in FIG. 13c. Key human resources are checked. Here, when the movement designation key 70+ is turned on, step (
Perform scale scanning drive control of 27) to (32),
When the movement designation key 70-X is turned on, step (37)
- (40) Scale return drive control is performed.

That is, when the movement designation key 70+x is turned on.

First, refer to the contents of the scale scanning position counter27)
, check whether the content is greater than or equal to the running direction limit value (for example, the value corresponding to the long side of A3 size paper) LMP, and if not, the solenoid 103 is energized and the scale 100 is activated. Carriage 99 (Figure 2b)
(Ride on the upper arm SA) and set the lamp 3 to low illumination (39). Next, the time dt2 until the scale 100 gets on the arm SA by energizing the solenoid 103
Wait for the elapse of (30), and then turn the carriage 99 scanning motor 10
6 (5th m) is set to low speed forward rotation bias, and carriage 9
The synchronous pulse generator 107 (FIG. 5), which generates electric pulses in conjunction with the movement of the motor 9, starts counting up the pulses generated (31), and then sets the carriage scanning flag (32).

After starting the scanning drive of the carriage 99 in this way (with the carriage scanning flag), press the movement designation key 70 +
While x is on, steps (26)-(27)-(28
−■)... and so on. When the count value reaches the limit value LMP, the process proceeds to step (34), where the motor 106 is stopped and the carriage scanning flag is cleared (35).

When the movement designation key 70+x changes from on to off.

Step (26) -(33) -(34) -(35
) and stop the motor 106 in the same way.

When the movement designation key 70-x is turned on, the content of the counter for detecting the scale scanning position is referenced, and if it indicates the home position (0), the motor 106 is not energized; otherwise, the motor 106 is not energized. 106 is set to low speed reverse bias to start a down count (39), and a carriage return flag is set (40).

After starting the return drive of the carriage 99 in this way (with the carriage return flag), press the movement designation key 7.
While 0-x is on, steps (36) - (37) -
(3g-■)... and so on. When the count value reaches the home position HP value (0), the process proceeds to step (42), where the motor 106 is stopped and the carriage return flag is cleared (43).

When the movement jl key 70-x changes from on to off.

Step (3G) -(37) -(42) -(43
) and stop the motor 106 in the same way.

With the scale drive control described above, the operator presses the switch 58S or 57S to switch to mode A Cll1.
mode) or mode B (character print mode), press the scan key 105S to set the scale drive mode, and then press the movement designation key 70+x.The scale 100 is supported by the carriage 99 and the illumination light is set to low brightness. The scale 100 is turned on, the graduations of the scale 100 are projected onto the document on the contact glass, and the scale 100 begins to move in the exposure scanning direction. When the movement designation key 70+x is pressed (off), the scale stops there.

When the movement designation key 70-x is pressed, the scale 100 moves in the return direction, and the movement designation key 70-x is released (off).
The scale stops there. In any case, from the time you press -liquid transfer designation key -70+K, scan key 1
Until the scale scanning mode is canceled by pressing 05S again, the solenoid 103 is energized and the illumination lamp 3 is lit at a low intensity, so that the operator can see the scale projected image on the document.

The operator's required operations for erasing area (mode A) input and print area (mode B) are now summarized as follows.

1. Key 58S or 57S on.

2. Turn on scan designation key 105.

3. Move designation key 70+X on (then press 7 if necessary)
0-x ON) to stop the scale at one corner of the required area.

4. When erasing within the specified area in mode A, the first scale is 100.
At the scale value of a, or when erasing outside the specified area, the second
Input the Y coordinate value of the corner using the numeric keypad 44 according to the scale value of the scale 100b, and then turn on the r and '' keys 44'. In mode B, the same result is obtained no matter which scale is used.

5. Above 3. Similarly, stop the scale at another diagonal corner of the required area.

6. Enter as in 4 above.

7. Turn on the scan designation key 105 again to cancel the scale scanning mode.

***Next, the operator's step 4 above. The area data input process in response to the operation will be explained. When the operator operates the numeric keypad 44, step (22) in FIG.
The numerical value assigned to the key pressed in is read into the numerical value register. Next, when the key 44' is turned on, it is detected in the 13cth step (44) and the process proceeds to step (45).

Here, the above 4. Since i=0 until the operation, the process proceeds to step (46) and stores the contents of the numerical register in the Yf register and the scale scan count value (scanning position detection value) in the Xf register, and in step (47) , set i=1 indicating the end of the first diagonal coordinate input, and step (
At step 48), wait for the dTl time to elapse and return to operation board reading (9). That is, when the operator selects a scale of 10
Move 0 to the desired position, input the scale value using the numeric keypad, and press the "," key 44'.
Set in the f register.

Next, in the same way, 5. Move the rescaler to the next position and repeat step 6 above. When you enter the scale value with , this time, i
= 1, so step (45) to step (49
) and set the contents of the numerical register to the YQ register and the scale position to the XQ register.In the second operation, set the values to the YQ and A read end flag indicating that the read has ended is set (50b).

With the above steps, the coordinates of the diagonal corners of the desired area of the document have been read into the microprocessor 80.

＊＊＊＊＊ The operator is in step 7 above. When the rescan designation key 105S is pressed, this is read in step (9) and the scan key 105 on flag is cleared.
Correspondingly, the control is in step (25) of FIG. 13b.
Proceed to step (58), and scale scan end processing step (58) - (59) - (60) - (61)
Then, the scale 100 is returned to the home position HP, the solenoid 103 is deenergized, and the lamp 3 is turned off. Next, set the erase area shown in FIG. 13d, or
Set the print area shown in Figure 3e.

First, the setting of the erase area will be explained with reference to FIG. 13d. If the switch 58S on flag is present (if mode A is set, 262), check whether there is an erase set flag (a flag indicating that steps 71 to 81b for setting the erase area have been executed), 63), or not. (
(unset) and check whether the read end flag is present (
64). If there is no read end flag, the area coordinate data has not been input yet! Proceed to other key-in processing shown in Figure F513f and below. If there is a read end flag, the area coordinate data has already been input, so step (7)
In step 1), the contents (value) of register Yf are compared with 300. The content Yf of the Yf register is less than 300.

Since the numerical value has been input based on the first graduation 100a of the scale 100, it is assumed that ``r'' is indicated and ``t'' is selected, and after the area determination in steps (72) to (77), step (78a) is performed. In steps 81a to 81a, the image within the specified area is erased (erase area setting). In this,
In step (72), the content Ya of the YQ register is also compared with 300 to see if it is an input value based on the first scale 100a. At this time, if Ya is less than 300, the two-point input number nine is also based on the first scale 100a, so the calculated values AYf and AYQ are set to Yf and YQ, respectively. However, when Yfl is 300 or more, t! The coordinates entered with & are the second scale 100
b (sleepover), but in this case, priority is given to what is input to the light, and the calculated value AYf
and AYΩ are respectively tLYf and Ya-300.

That is, the value input later is updated to the value based on the first scale 100a (steps 72 to 74). Next, in steps (75) to (76), the designated area range compatible with the eraser 24 is determined, and an image erasing area is set (78a) to
(81a). In other words, the position on the X coordinate within the range indicated by the contents of register Xf and the contents of register XQ and AYf
Data for controlling the liquid crystal shutter is set so that erasing is performed within a rectangular area specified by and a position on the Y coordinate within the range indicated by AYQ.

In step (71) above, the contents of register Yf are set to 30.
As a result of comparison with 0, if Yf is 300 or more, the numerical value has been input based on the second graduation 100b of the scale 100, so it is assumed that "sleepover" is instructed, and steps (83) to (88) are performed. After area determination, step (7)
8b) to (81b), the image outside the specified area is erased (erase area setting). In this step (8
In 3), the content Yfl of the Yff register is also compared with 300 to see if it is the input value based on the second scale 100b.

At this time, if YQ is 300 or more, both of the two input points are based on the second scale 100b, so the calculated values AYf and AYQ are set to Yf-300 and Yf-300, respectively.
It will be Q-300. However, if Yu is less than 300, the coordinates input later will be the first scale 100a (nakazuke).
However, in this case, priority is given to what is input to the light, and the calculated values AYf and AYQ are
are Yf-300 and Yu, respectively (step 7
2 to 74), and then in steps (75) to (76), the specified area range corresponding to the eraser 24 is determined, and an image erasure area is set (78b) to (81b). That is, outside the rectangular area specified by the contents of register Xf, the position on the X coordinate within the range indicated by the contents of register xn, and the position on the Y coordinate within the range indicated by AYf and AYQ. Set data for controlling the liquid crystal shutter so that erasing can be performed using

Once the image deletion area is set in this way, the process returns to step (9) for reading the operation board through other key manual operations shown in FIG. 13f and subsequent steps.

In step 62 of FIG. 13d, if the switch 588 on flag is not present (not in mode A), the process advances to step 66 to clear the erase set flag (this flag is set using the scan key as described above) to enable setting of the next area. 105
(It is also cleared by the operation of S), or if there is an erase set flag in step (63) (setting of the erase area in mode A has been completed), the switch 57
Check the 3-on flag (67). If this flag is present, mode B has been set, and the process proceeds to the print area setting shown in FIG. 13e. This print area setting is similar to the setting of a double erase area.

However, when setting the print area, characters, etc. are written in the specified area, so coordinate input based on the number on the first scale of the scale 100 is written directly to the register, and input based on the number on the second scale is written in the register. 300 from the value
is automatically subtracted, that is, converted into a value based on the first scale.

Setting the print area in this way allows you to print copies (
In mode B), the liquid crystal shutter 244 and the eraser 2
Text information is written in the print area specified in step 4, and the image exposure shutter 2 is set so that the latent image of the text etc. does not disappear.
00 blocks the image light in that area (background images such as characters are erased).

When the page print designation key 60S is operated in input reading (9) on the operation board, step (12) in FIG.
4) is detected and the switch GOS on flag is set/
Reset 1~The state is reversed.

At this time, if the switch 603 on flag has been reset, the switch 603 on flag is set, the 1st display 60L is lit, the 2nd display 60L is lit, and the switch 595 on flag, which will be explained next, is cleared and the display 59L is turned off. (125 and 126). In this case, key 60
If you enter a value from the numeric keypad 44 while pressing 5 (
In the subroutine of step (21a and 2Lh) in FIG. 13a and step (21i) in FIG. 13a, the input value is read into the page start register, and the page counter that counts the number of document changes is reset. However, the value of the page start register is 1 in the initial state.

Further, when the switch 608 on flag is set, the switch 603 on flag is reset and the 9 display 60L is turned off (125 and 127).

The subroutine of step (21+) in FIG. 13a is.

If the numeric keypad 44 is operated without turning on the switch 593, the process returns to step (22).

When the fractional page print designation key 59S is operated in input reading (9) on the operation board, step (
128), and the set/reset state of the switch 598 on flag is inverted. At this time, switch 5
If the 98 on flag is reset, switch 59
8 sets the on flag, turns on the 9 indicator 59L; clears the on flag of the switch 608, and turns off the indicator &OL (129 and 130). In this case, key 59
If you enter a value from the numeric keypad 44 while pressing S, (
In the subroutines 21a and 21f) of FIG. 13a and step (21g) of FIG. 13a, the input value is read into the fractional page register, and the page counter for counting the number of document changes is reset.

Further, when the switch 595 on flag is set, the switch 593 on flag is reset and the second display 60L is turned off (129 and 131).

The subroutine of step (21f) in FIG. 13a is as follows.

If the numeric keypad 44 is operated without the on flag of the switch 593, the process returns to step (22).

In this way, page printing and fractional page printing are performed alternatively, so in step (126) and step (130) in FIG. 13F, when the switch 608 on flag is set (page printing is set), the switch 598 on flag is cleared. and set the switch 598 on flag (
When fractional page printing is set, the switch 608 on flag is cleared.

When the page print position designation key 61S is operated during input reading (9) on the operation board, step (
132), the position data indicating the position at which the page is to be printed is updated. In this position, the positive direction of the Y axis (vertical) is up, and the positive direction of the X axis (horizontal) is right.

As for the position data, O is the lower cloth, 1 is the lower thread, and 2 is the upper thread.

3 corresponds to each page print position in the upper row, and each time the page print position designation key 61S is operated, 1 is added to the position data (133), and if the value is 4 (13
4) Return to O 135) Turn on the lamp corresponding to the position data (136) The page print position specified here is the position where the front side of the recording sheet is copied in duplex mode, and will be described later. However, when copying the back side, the position data is converted.

As described above, in this embodiment, the X-axis direction is horizontal, so when copying with the X-axis direction vertical, the orientation of the printed page is distorted. Therefore, in such a case, the operator operates the page print orientation designation key 62S to change the orientation of the page to be printed to vertical orientation (however, this does not change the standard of the page print position mentioned above).
.

When the page print posture designation key 62S is operated in input reading (9) of the operation board, step (13g) is executed.
137) and the posture of printing one page is changed 1
The page print posture key 62S is an alternate switch, and when a vertical flag is present, it clears the vertical flag, turns off the display 62L2, and lights the display 62L1.139:
If there is no vertical flag, the vertical flag is set, the display 62L1 is turned off, and the display 62L2 is turned on (140: "r vertical posture" set).

The operation of the direct copy designation key 67S is performed in step (154).
) and replaces the set/reset state of switch 678 on flag. In this case, if there is no switch 678 on flag (155), then double-sided copying was not specified in the previous process, so set it and display 678.
5L is lit (151), but if the switch 655 on flag is present.

There are two possible processes before that. The first is , the state in which double-sided copying has been completed, and the second is .

This is the state in which the copying of the first side of a double-sided copy has been completed. These states can be determined by checking whether there is a recording sheet on the intermediate tray 34. switch 6
If the 78 on flag is present (155) and the intermediate tray 34 has no recording sheet (158), it is in the first state;
This flag is cleared and the display 67L is turned off. Switch 675 with on flag (155), intermediate tray 3
If No. 4 has a recording sheet (158), it is in the second state and no changes are made to the settings.

13f and 13g will be explained. Processes corresponding to the manual power of the other keys of the magnification adjustment key 55U (101), dt
The enlargement magnification is set successively at one hour intervals and the value is displayed in the 1 magnification register (102-104).

Key of magnification adjustment key 55D depends on manual power (105).

The reduction magnification is set sequentially at dt1 time intervals and the value is displayed in the magnification register (106.107.104).

Manually press paper cassette selection key 50 (10g)
, when the upper cassette 11 is selected (109), the lower cassette 12 (111) is selected, and when the lower cassette 12 is selected (109)
In 9), the paper feed system is changed for each of the upper cassettes 11 (110), and a corresponding display is performed.

When operating the scale print designation key 64S (141)
, if there is no switch 648 on flag (142)
, set it, set the contents of the copy magnification register in the scale magnification register, and turn on the display 64L (143
), but with the switch 645 on flag (142
), clear it and turn off the display 64L (144)
do.

When the scale print magnification designation key 63S is operated,
It is detected in step (145), and the set/reset state of the switch 638 on flag is reversed. That is,
If the switch 63S on flag has been reset, the switch 633 on flag is set and the display 63L is turned on (147).

In this case, if you input numerical values from the numeric keypad 44 while pressing the key 63S (21a and 21b in Fig. 13a)
, the input value is read into the scale factor register in the subroutine of step (21c) of FIG. 13a. In addition, when the switch 638 on flag is set, the switch 63S on flag is reset and the 2 display 6
3L is turned off (146 and 148). The subroutine of step (21e) in FIG.
If the numeric keypad 44 is operated without an on flag, the process returns to step [22].

In step (149), when the operation of the fold print designation key 66S is detected, if there is no switch 668 on flag (150), it is set (151), but if there is a switch 668 on flag (iso), it is cleared. do. At this time, the display 66L
Change the display.

In step (153), when the operation of the fixed pattern print information selection key 65S is detected, if there is no switch 655 on flag (150), it is set to turn on the display 65L (151), and if there is a switch 655 on flag (151), 150), clear it and display 65
Turn off the L light (151).

In this case, when the switch 658 has an ON flag and a numerical value is input from the numeric keypad 44 while pressing the key 65S (21a and 21d in FIG. 13a), the first
In the subroutine of step (21a) in Figure 3a, the input value is read into the text number register. This subroutine (21e) returns to step (22) when the numeric keypad 44 is operated without the switch 658 on flag.

The various conditions for creating a copy are set by the operator's operations described above. Here, when setting the area in mode A, do you want to erase the inside or outside of the specified rectangular area?

Of the diagonal points of the rectangular area, please pay attention to the first corner specified, which is determined by the human power value of the numeric keypad. The first scale 100a and the second scale 100b of the scale 100 have different scale values and are assigned to different processing modes (pickling in the middle of the day, overnight stay), so
The processing mode is automatically set according to the manual input value of the numeric keypad. This eliminates the need for the operator to perform key operations to specify "Nakazuke" or "Sleepover".

Finish setting the copy conditions and press the print start key 43.
When is pressed (1 (la)), if page printing or fractional page printing is specified (10b), a page count setting subroutine is executed (10c). This subroutine is shown in Fig. 13h. In this embodiment, the operation of the print start key 43 is considered to be synonymous with replacing the document.

When mode A is set for page printing,
The same recording sheet is fed repeatedly.

If the page is printed in green, only that part will be crushed in black. Therefore, in order to print only the first time and prevent page printing from the second time onwards, we detect the first feeding of the recording sheet. There is a need. Step (200
) to (205) are steps for detecting this. That is, with the switch 585 on flag (200),
If the white lamp is lit on the display 58L (201)
, is the first stage of mode A, and means the first feeding of the recording sheet. However, as mentioned above, mode A
Since the first stage may be set from the second stage of Sometimes it is in a reset state. In this state, the 1-page counter is incremented by 1, a count flag is set, and the inhibition of 1-page writing is canceled (203).

When the first stage is set from the second stage, there is a count flag, so page writing is prohibited (202 and 204
), however, writing on this page is prohibited using eraser 24.
This only prohibits the liquid crystal shutter 244 from printing the page, but does not prohibit the image exposure shutter 200 from blocking light from the page print area.If the display 58L is a red lamp (201).

Next, since mode A is expected to end, the count flag is cleared (205). In this case as well, page writing remains prohibited.

If there is no switch 585 on flag, it is not mode A (200), so the page counter is incremented by 1 and the inhibition of page writing is canceled (206).

When the switch 603 has an on flag (207), a start page is specified, so the value of the page counter is added to the value of the page start register set by the operator. At this time, since the page will be printed from the set value, start the page, subtract 1 from the value of Dostar, add the value of the page counter to this value, and store it in the page register (208), Specify the start page. If there is no switch 608 on flag, store the value of the 9 page counter in the page register (209), C
PU is.

Execute page printing using the value of this page register.

Position data indicating the print position of the page set in steps (132) to (136) is stored in the position register (210).

In double-sided copying, one side of the copy is considered to be bound and compiled, so if the page print position is the same on the front and back sides of the copy, the printed page will be in the binding margin. It will end up being hidden. Therefore, when single-sided copying is specified (211), position conversion processing is executed.

If the page counter is an odd number (212), it is a front copy, and the operator has specified the page print position (first page print position).
Steps 132 to 136) in Figure 3g are performed on the front side of the recording sheet, so there is no need to perform position conversion, but when the page 1 counter is an even number (212)
, so it will be a copy of the back side.

Perform the conversion. Referring now to Figure 2a.

In the case of single-sided copying in the copying apparatus of this embodiment, the recording sheet with a copy on the front side that exits the fixing unit 21 is
The transport direction control mechanism 31 sends the paper to an upper reversing route, returns it, and then sends it to a lower return route where it is reversed. In other words, the recording sheet always moves in the transport direction (
(X-axis direction), the page print position converts right to left or left to right. This is because the Y axis is set vertically, so it has nothing to do with the orientation of page printing. In other words, when the value of the 1 position register is 0 (lower cloth), it is set to l (table below), and when the value of the 1 position register is 1 (table below), it is set to O (lower cloth),
When it is 2 (old and used), it is 3 (above table), and when it is 3 (above table), it is 2 (
(213).

When the page count setting subroutine of step (10c) is exited and the main routine is returned.

Steps (11) - (12) - (13) - (14
) −(15) −(16) −(17) −(1B)
-(19) -(20) -(8)-(9)-...
. . . or step (11) . . . to perform the copy process.

"Start cycle processing J (12) performs processing necessary to start the copy process such as initialization of the photoreceptor. Most of the copy process including control of the eraser 24 is performed in "l Copy processing J (13). ).In other words, the timing pulses (not shown) output every minute rotation of the photosensitive drum 9 are constantly counted, the timing is grasped by checking the value, and the control is performed according to each timing. Control of the eraser 24 is started from the tip erase timing T1.

Every time the erase area changes, that is, in mode A, timings TI, T2, . . . in FIG. 7a. T3゜T4. T
5 and T6, the data set in the eraser driver 245 is updated.

In the case of the character print mode (mode B), if the diagonal small square in Fig. 7a is set as the print area, each time the erase area changes, that is, timings Tl and T2 in Fig. 7a. ．． T3. T4. T
5 and at T6.

The data set in the eraser driver 245 is updated, and between timings T3 and T4, character recording, which also serves as erasing, is performed in which the character information area is shielded from light and the other parts are transparent within the diagonally shaded small square.

Control-L-t241 (Figure 4b) (7) ROM24
Fixed pattern information such as sentences is stored in 1E for each number. Enter number 13 to specify one piece of text information.
Since it has been read in steps (21d and 21B) of a[, if there is a designation to print text, etc., when the first copy process (13) is entered, the control is performed in response to instructions from the microprocessor 80. It is read by the CPU 241A of the unit 241. The CPU 241A generates image information (pixels) for each line of text information based on this information when the erased part enters the print area.
is given to the liquid crystal driver 245. In response to this, when the exposed area enters the print area after a predetermined delay, the microprocessor 80 interrupts the image exposure of this area.
Light transmission/non-transmission of the image exposure shutter 200 is controlled as described above.

When there is a 608 ON flag that specifies page printing, the microprocessor 80 has detected the recording sheet size in advance, so the position register (FIG. 13a) processed in the 1 page count setting subroutine in 1 copy processing (FIG. 13a) is 10e and 13h figures 213-215)
The CPU 241A of the control unit 241 is instructed to read the page print position indicated by and the numerical information indicated by the page register (FIG. 13a, 10e and 13h, 200 to 210). If page writing is not prohibited, the CPU 241A reads the numerical information in the specified direction, and when the erased area has progressed to the corresponding area, the CPU 241A sends the image information (pixel) for each line to the liquid crystal driver 245 based on this information. give. When the exposed area enters the page print area after a delay of a predetermined time, the microprocessor 80 operates the image exposure shutter 200 as described above in order to cut off the image exposure of this area, regardless of whether or not page writing is prohibited. Light transmission/
Control opacity.

The processing when the fractional page print switch 598 on flag is present is the same as the page print processing described above, but the print information for the number of one page, "/" and the print information for the total number of pages stored in the fractional page register are combined. and "page/all pages"
The difference is that

If scale printing is specified, one copy process (
In 13), the microprocessor 80 sends area data and scale magnification for printing scales to the top and bottom margin areas and left and right margin areas to the control unit 241 based on the recording sheet size. in the area shown.

Information for printing the vertical scale data and horizontal scale data stored in the ROM 241D at a specified magnification is created and given to the driver 245.

In response to this, when the exposed area becomes that area, the image light blocking information of the area is transferred from the microprocessor 80 to the control unit 82, so that the control unit 82
Exposure of the scale writing area is blocked based on the given image light blocking information.

Similarly, when folding printing is specified, in the 1 copy process (13), the microprocessor 80 provides folding position data and folding printing instruction data to the erase control unit 241, and the image exposure shutter control unit 8
2, information is given to indicate that the area specified by the folding position data is to be shaded.

The control unit 241 causes the area indicated by the folding position data to
Information for printing the folding mark "+" stored in the ROM 24LD is created and given to the driver 245. The control unit 82 blocks exposure of the folded writing area based on the provided image light blocking information.

In the copy process without switch 578 on flag and switch 588 on flag.

Steps (91), (93), in Figure 13b
(95).

Recording paper area [(S11T2)t(
S2. T5): If no adjustment is made, erasing outside the standard area for the recording paper size is performed.

Next, the relationship between operator operations and the corresponding copies obtained will be summarized.

10 Normal copy mode: When the operator presses the print key 43 with the double-sided copy designation display 67L shown in FIG. Copying is performed at the magnification set using the magnification adjustment keys 55U and 55D. Since this copy control operation is well known, detailed explanation will be omitted. 2. Duplex mode: When the operator presses the duplex copy designation key 67S, the display 67L lights up.0 With the display 67L lit, press the print key. Press to copy the first original. copy is second
The transport direction control mechanism 31 shown in FIG.

The operator sets the second original, presses the print key, and presses the print key. A copy of the two manuscripts recorded on the back side of the copy of the first manuscript is obtained.

3. Mode B copy mode: When the operator presses the copy mode B selection key 57S, the display 57L lights up (mode B setting). Display @57L
When the scan key 105S is pressed after is lit, display 1
05L lights up (scan mode setting), the operator presses the movement designation key 70±X in this state.

70±y to drive the scale 100 to the desired position, enter the y coordinate (scale graduation) using the numeric keypad 44, and select "
," key 44' is pressed.

As a result, the coordinates of the first corner of the print area are read into the copying machine. Next is the operator.

Also, operate the movement designation keys 70±x and 70±y to drive the scale lOO to the required position, and use the numeric keypad 44 to move the scale lOO to the desired position.
41 (scale graduation) and presses the key 44'. This causes the coordinates of the second corner (diagonal corner) of the print area to be read into the copying machine. Next, when the operator presses the scan key 105S, the display 105L appears. The light goes out and the carriage 99 returns to its home position.

The operator presses the fixed pattern print information selection key 65S.
If you input a numerical value using the numeric keypad 44 while pressing , the numerical value is read into the copying machine as print text designation data. When the operator presses the print key 43, a copy is obtained in which the designated text is written in the designated area of the original at the copy setting magnification.

4. Copy mode of mode A: When the operator presses the copy mode A selection key 58S, the white lamp on the display 58L lights up (first stage setting of mode A). In this, the erasure area (or extraction area) is
．． However, in this area setting, whether to erase the inside or outside of the set area is determined depending on whether the first scale or the second scale of the scale 100 is used. When the first original is set and the print key 43 is pressed, a copy of the original with the area inside the set area (or outside the set area) erased is guided to the lower transport path by the transport direction control mechanism 31 shown in FIG. 2a. intermediate tray 34 without being turned over.
will be stored in. At this time, the display 58L changes to turn on the red lamp (the second stage of mode A is set).When the 2M document is set, area extraction (or deletion) is set, and the print key 43 is pressed, the A copy (edited copy) is obtained by inserting the image of the setting area (outside or inside) of the second original onto the copy of the intermediate tray 34 in which the inside (or outside the setting area) of the 1JJ draft has been erased. .

This copy is ejected to the outside, but if the key 58S is operated again in the second stage of mode A (red lamp lit), the copy returns to the first stage of mode A (white lamp lit) and is placed in the intermediate tray again.
It is accommodated in 4.

5. Combined mode of modes B and A: The operator uses 3. above. input operation and 4 above. After performing the input operation, press the print key 43, and then press the print key 43.
After copying the original, press the copy mode B selection key 57.
Operate S to turn off the indicator light 57L and copy the second JJI draft. Or 4 above. The input operation is performed to copy the 1st M draft, and the 3° input operation is performed to copy the 2nd draft.

According to this, it is possible to create a composite copy without erasing the image (the background of the characters) of the print area such as text characters. That is, specify mode A and mode B together,
Conditions without image information, for example, a white original image, mode B
Mode A: prints characters, etc. on a recording sheet, and then superimposes them on the original image without specifying an area.
By executing the second stage, that is, one normal copy, a copy in which a fixed pattern such as text is superimposed on the original image can be obtained.

In this case, it is possible to create a normal copy first. In other words, a normal copy is made in the first stage of mode A with no area specified, and the second stage of mode A is re-fed.
If mode B is also designated in the column and characters are printed without the original image, a superimposed copy can be created in the same way.

6. Above 2. and 3. Combined use mode: The operator uses the above 2. After performing the input operations in step 3 and step 3 above, press the print key. You will get a copy with the same text printed on the front and back. After copying the 1st M draft,
Also, if you perform the 3° operation, a different text will be printed on the copy (back side) of the 2M draft.

7. Above 2. and 4. Combined mode: This mode makes a composite copy of two originals (1st and 2nd originals 11) on the front side, and a composite copy of two originals (3rd and 4th originals) on the back side. In 1-duplex mode, the front side is copied in mode A, and the back side is copied in mode A, and 3. requires input operations.

8. 2 above. and 5. Combined use mode: In duplex mode copying, perform the input operation in step 5 above for each of the front side copy and the back side copy.

9. Page print mode; The operator performs the above 1. ~8. In addition to the mode setting operation, input the start page from the numeric keypad 44 while pressing the page print designation key 60S with the display 60L lit (l if there is no input). In this mode, press the page print position designation key Operate 61S to display displays 61L1 to 61.
Arbitrarily specify the required position indicated by the lighting of La, and
Operate the page print orientation designation key 62S to display the display 62L.
It is possible to specify the required number of pages to be printed, which is indicated by the lighting of 1 or 62L2. When the print key 43 is pressed, the set position and posture are set.

The number of original replacements is printed as the number of pages from the starting page, and the number of times the document is replaced is printed as the number of pages from the start page, and ~8. A copy with the image determined by the mode is obtained.

In this case, if mode A in which the same recording sheet is repeatedly fed is set, page printing is performed only on the first feeding of the page, and if single-sided copying is set.

The page print positions for the front and back sides are automatically changed. Also, the size of the recording sheet is
This is because it is detected by reading the detection mark 11 or 12) in the figure.

The print position is automatically set according to the position specification.

100-minute page print mode: The operator performs the steps described in 1. ~8. In addition to the mode setting operation, with the 1 display 59L lit, the user operates the numeric keypad 44 while pressing the fractional page print designation key 59S to input the total number of pages (M manuscript number). Thereafter, the switch 61S is operated to light up the indicators 61L1 to 61L4 indicating the desired position. This mode is different from the above 9° in that "page/all pages" is printed, and other points are the same.

11. Scale print mode: The operator performs the above 1. ~10. In addition to the mode setting operation, the scale print designation key 645 is pressed to light the display 60L. If scale printing at the set copy magnification is acceptable, the print key 43 is pressed.

When you want to change the scale magnification, press switch 63S.
Press to light up the display 638, and press the key 638 to turn on the display 638.
Press and hold S) to operate the tinkey 44 and input the scale recording magnification. When the print key 43 was pressed, a scale was printed on the left and right margins and the top and bottom margins of the recording paper. Above 1. ~10. A copy with the image determined by the mode is obtained. This allows the operator to know the image area to be edited.

12. Fold-fold printing mode: The operator performs the above 1. ~11. In addition to the mode setting operation, press the fold print designation key 66S to display the display 66.
Turn on L.

When the print key 43 is pressed, a "+" mark is printed on the upper and lower margins of the center of the sheet in the exposure scanning direction based on the detected recording sheet size, and the above-mentioned 1. A copy in which an image determined by the modes 1 to 11 is recorded can be obtained.

In the embodiment described above, the scale 100 is mounted on the exposure scanning carriage 99, and the scale 100 is driven in the exposure scanning direction and stopped at a desired exposure scanning position, and the numeric keypad 44 and comma key 44 are driven.・Del
By inputting the coordinate information of one axis and reading the coordinates of the other axis as the position information of the carriage, corner coordinates for area specification can be input.However, the scale 41X attached to the edge of the contact glass plate Similarly, the coordinate data for both axes may be input using the numeric keypad 44 or the like by referring to 41Y and 41Y.

The position of the page print specification may also be specified using coordinate data to obtain more freedom. In this case, in duplex mode, the page print position information of the front side (first side) is recorded. It is sufficient to convert the position information to symmetrical information with respect to the center line of the recording sheet, which is perpendicular to the direction in which the sheet is reversed.

In the above embodiment, the liquid crystal shutter 200 is also used as an image exposure shutter, but the image exposure is partially blocked by selectively driving one or more shutter plates to a desired position. Good too.

■Effects As described above, according to the present invention, the eraser 24 is used as the erase light source 240 and the liquid crystal shutter 244. Transmission/non-transmission of the erase light can be controlled for each dot by selectively applying a light transmission control voltage to the electrodes.
The second page (
On the back side), pages can be easily printed at appropriate positions on copies by selecting each segment electrode and applying a translucent control voltage based on the second position information for page printing and numerical pattern information for the number of pages. It is possible. In this case, since the first position information and the second position information are obtained by converting the other, the operator only needs to specify one of the position information, which simplifies the operation.

Furthermore, if the number of pages is updated every time the original is replaced, copies of multiple originals can be automatically assigned pages.

Furthermore, even if the light transmission/non-transmission is controlled for each dot, it is possible to finely arrange and wire the segment electrodes and extraction leads using printed wiring technology, so it is not possible to do complex wiring such as connecting individual light emitting diodes with leads. Electrical connections are omitted and lead wiring becomes compact.

[Brief explanation of drawings]

11th ii! I is a perspective view showing the appearance of one embodiment of the present invention. FIG. 2a is a longitudinal sectional view of the copying apparatus shown in FIG. 1. Fig. 2b is an enlarged sectional view showing elements around the photoreceptor drum, Fig. 2c is a partially enlarged sectional view showing details of the illumination lamp 3 shown in Fig. 1, and Fig. 2d is an enlarged sectional view showing elements around the photoreceptor drum. FIG. 2 is a plan view of the scale 100 shown in FIG. FIG. 3 is a partially enlarged plan view showing the external appearance of the operation panel 42 of the copying machine shown in FIG. FIG. 4a is a cross-sectional view of the eraser 24, and FIG. 4b is a block diagram showing electrical elements connected to the eraser 24. Fig. 4c is a time chart showing the energizing signal per dot when the eraser 24 is energized in the character print mode, and Fig. 4d is a time chart showing the energizing signal per dot when the eraser 24 is energized in the erase mode. It is a time chart showing the momentum signal. FIG. 5 is a block diagram showing the electrical circuit configuration of the copying machine shown in FIG. 1. 6a is a block diagram showing a specific configuration of the control unit 82 and image exposure shutter driver 77 shown in FIG. 5, FIG. 6b is a block diagram showing the electric circuit configuration of the integrated circuit ICI shown in FIG. 6a, FIG. 6C is a timing chart showing signal states of each part of the control unit 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. Figure 7b shows J! FIG. 3 is a plan view showing the optical positional relationship between a document, a lens, and a photoreceptor. FIG. 8 is a plan view showing the original on the contact glass 1 and the coordinates of a part of the original. Figures 9a, 9b, 10a and 10b. FIGS. 11a, 11b, 12a, and 12b are schematic diagrams showing different patterns formed by combinations of designated areas and erase areas. 13a, 13b, 13e, 13d, 13e, 13f, 13g, and 13h are flowcharts showing the general operation of the microcomputer 80 shown in FIG. 5. 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 1O2 developer unit 11.12: Paper feed cassette 13.15: Paper feed roller for paper feed cassette 14.16.1
8: Feed roller 17: Registration roller 19: Transfer charger 20
: Separation charger 21: Fixing unit 20: Separation charger 21: Fixing unit 22: Cleaning unit 23: Charging charger 24: Eraser 240: Cathode ray tube (erase light source) 241: Eraser control unit (pattern generation means 2 summer number recording Control means) 244: Liquid crystal shutter 245: Liquid crystal driver (liquid crystal biasing means) 31: Conveyance direction control mechanism 32: Conveyance roller 33: Conveyance belt 34: Intermediate tray 35: Paper feed rollers 30, 32, 36 for intermediate tray: Feed rollers 30 to 36 two reversing paths and return path (reversing sheet feeding means) 41x: X scale 41y: Y scale 42: Operation board 43 Print start key 44: Numeric keypad 46: Set sheet number display 47: Copy sheet number display 57S: Copy mode B designation key 58S: Copy mode A designation key 59S Bifraction page print designation key 60S = Page print designation key 61S: Page print orientation designation key 62S: Page print orientation designation key 70+x, 70-x, 70+y, 70 -Y: Movement designation key 71+x, 7o+y: Movement amount display 77: Image exposure shutter driver 80: Microcomputer 82: Control unit 93.94: Programmable interval timer 99:
1st carriage 100 scale 100a: 1st scale 100b
: Second scale 101, SA double scale support arm 102: Axis 103: Solenoid 104:
Tension coil spring 105 Niscan instruction key 106: First carriage drive motor 107: Synchronous pulse generator Patented by Ricoh Co., Ltd.

Claims (3)

[Claims] (1) Image light is projected onto a uniformly charged photoconductor via an optical system to form an electrostatic latent image, and this electrostatic latent image is developed to transfer a visible image onto a recording sheet. In a type of copying machine that uses: An erase light source arranged in the width direction of the photoreceptor that exposes the surface of the photoreceptor after charging and before development; A light transmission control electrode is located between the erase light source and the photoreceptor and is divided in the width direction. arranged liquid crystal shutters; liquid crystal energizing means for selectively applying a light transmission setting voltage and a light non-transmission setting voltage to each of the light transmission control electrodes; after transferring a visible image to the first surface of the recording sheet, a second Reversing sheet feeding means that guides the surface to the photoreceptor as a transfer surface; page number storage means that stores the number of pages; pattern generation means that generates character pattern information corresponding to the number of pages stored by the page number storage means; and a recording sheet. When the first surface becomes the transfer surface, select the light transmission control electrode corresponding to the first position information and the character pattern information generated by the pattern generation means, and apply to the liquid crystal biasing means,
Instructs the application of a light non-transmission setting voltage to the selected light transmission control electrode and the application of a light transmission setting voltage to the other light transmission control electrodes; when the second surface of the recording sheet becomes the transfer surface, the second A light transmission control electrode corresponding to the position information and the character pattern information generated by the pattern generation means is selected, and the liquid crystal energizing means is applied with a light non-transmission setting voltage to the selected light transmission control electrode. A copying apparatus comprising: page number recording control means for instructing application of a light transmission setting voltage to a control electrode. (2) The page number storage means is a counting means that updates the stored contents every time there is a print start instruction; and the character pattern generation means is a fixed memory means for storing character patterns and a memory reading means. A copying apparatus according to scope (1). (3) The copying apparatus according to claim (1), wherein the erase light source is one cathode ray tube extending in the width direction of the photoreceptor.