JPS61241771A - Copying device adding print - Google Patents

Abstract

PURPOSE:To prevent the disappearance of a printed character (black), by intercepting the exposure by an original image on the printed area with a shutter plate. CONSTITUTION:When a motor 211 is normally rotated, a wire 207 is rotatively driven clockwise and a shutter plate 200 is carried to the area of original picture lights and, when the motor 211 is rotated in the opposite direction, the shutter plate 200 is rewound by a reel 206 and retreated from the exposure area. A base table 215 is attached pivotally to the frame of a copying machine and, when a solenoid 204 is conducted, rotates and the shutter plate 200 which is carried by the wire 207 intercepts the light of the original image. When the solenoid 204 is not conducted, the shutter plate 200 pulled out by the wire 207 is retreated from the optical path for exposing the original image and does not make any intercepting operation. When the leading position of the shutter plate 200 is optionally positioned, light interception can be performed to an optional position in a Y direction from an X axis. In a main scanning direction, an optional extent can be intercepted from light by optionally controlling the turning on and off of the solenoid 204.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a copying apparatus that projects light corresponding to an optical image of an original onto a photoreceptor to form an electrostatic latent image and develops the image.
The present invention relates to a copying apparatus that prints additional information on a copy of an original image.

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 an 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 section is set as non-exposed. The exposure section is exposed to original image light. In this case, the recording paper size, document size, and copying magnification are limited. In addition, an editing copy that creates an image of another original by making a copy by erasing an arbitrary area on the original and copying it again to the erased area (this time extracting the area corresponding to the erased area and erasing the other parts) Have difficulty. Therefore, recently, a light emitting diode array has been used as an erase light source (for example,
(No. 008710) When using a light emitting diode array, it is possible to extract (or erase) and copy an image of a desired area using, for example, a 2+am square rectangular area as the minimum unit.

However, even the smallest unit that can be set with a light emitting diode array, such as 2 mm square, may be too large for setting areas for erasing outside the original image or image extraction (erase) editing when copying at any magnification. When actively using an eraser to print characters such as letters, there is a problem that the minimum unit is too large. Another advantage is that the light emitting diode array has many and complicated wiring connections.

On the other hand, it has also been proposed to print additional information such as the date on the copy. In the past.

Separately from the eraser, a 7-segment character display is provided, and the characters displayed on the display are written, but in normal copying, the recording is negative (the characters are white and the background is black), and the black part of the background is the copied character. It occupies a large area on the top, smearing the copy surface and damaging the original image. Also, the character writing section is fixed.

■Purpose of the Invention The primary purpose of the present invention is to print additional information on copies in a positive format (the font is black and the background of the characters is white), and to enable the selection of the additional information writing area. The second purpose is to make it possible to set the erase area and additional information writing area in small units, and to easily connect the wiring of the additional means for erasing and printing additional characters, making it easy to create a compact design. A third purpose is to provide a copying device.

■Structure of the Invention In order to achieve the above object, the present invention is provided with an area input means for setting an additional information writing area, and is provided in the width direction of the photoreceptor, which exposes the surface of the photoreceptor after charging and before development. A liquid crystal shutter having light transmitting control electrodes arranged in a divided manner in the width direction is inserted between the arrayed erase light source and the photoreceptor, and a light transmitting setting voltage is applied to each of the light transmitting control electrodes using a liquid crystal energizing means. and a light-opaque setting voltage are selectively applied to erase the required area and print additional information in the area input by the area input means. A shutter plate that can select a light-blocking area and move forward and backward into an optical path for exposing original image light to a photoreceptor; a first shutter plate driving means that drives the shutter plate in the Y direction to set the position of the shutter plate in the Y direction; and a shutter plate. a second shutter plate driving means for driving the shutter plate to the exposure optical path; first and second shutter plate driving means for urging the shutter plate driving means; A shutter plate control means for instructing the second shutter plate drive biasing means is provided to block exposure of the original image in the additional information printing section.

According to this, the writing position of the additional print information can be adjusted and set, and since character formation is performed by shielding light and backtracking is performed by erasing, the background of the additional print information becomes white, and the additional print characters appear clearly in a positive state. Since the exposure of the original image in this print area is blocked by the shutter plate, the printed characters (black) will not disappear.

The segmented liquid crystal shutter is made by using normal liquid crystal plate manufacturing technology, and the control electrode that controls light transmission and non-transmission is divided into dot segments that can be expressed as characters, and is also formed integrally with the drawer lead, so that each segment can be selectively divided. The erase area or the image extraction (erase) area can be defined in extremely small units, that is, in character formation units. Also, like a dot printer, arbitrary characters can be added and printed.

Since the extraction lead and the segment electrode are integrated and continuous, the number of electrical connection points can be significantly reduced.

In this specification, the term "r character" includes all characters that can be expressed in a dot configuration, and includes numerals.

Also includes symbols etc.

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 an outline of the internal mechanism, and FIG. 2b shows an enlarged view of elements around the photoreceptor drum. ,1
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 outline of the Y-axis direction, an X scale (1 mm is the minimum unit) 41x along the original scanning direction X and a Y scale (1 mm is the minimum unit) 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 axial 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 1 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. Note that the illumination lamp 3. The first carriage (99) on which the first mirror 4 etc. is mounted is connected to the second carriage (99).
Mirror 5. It moves at twice the speed of the second carriage on which the third mirror 6, etc. is mounted.

The reflected light from the original is reflected by the second mirror 5. The light is guided to the surface of the photosensitive drum 9 through an optical system composed of a third mirror 6, a lens unit 7, and a fourth mirror 8. An image exposure shutter plate 200 is provided between the fourth mirror 8 and the photosensitive drum 9.
is located. This shutter plate 200 is provided to prevent the erase exposure area in the character print mode from being exposed by image light by the eraser W1 (eraser) 24 during copying in the character print mode to be described later.

Around the photosensitive drum 9, a charging charger 23, an eraser 24 . Current equipment 22/sito 10. Transfer charger 192 Separation naja 1920. Cleaning unit 2
It is equipped with 2 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 light from the document, the potential of that surface changes depending on the intensity of the irradiated light, thereby creating a potential distribution on the surface of the photoreceptor drum 9 according to the image.

That is, an electrostatic latent image is formed. Portions where the irradiation light is strong, that is, portions corresponding to the white color of the image, have a low potential, and portions where the light is weak, that is, the portions that correspond to the black color of the image, have a high potential.

As will be described later, the eraser 24 is comprised of a rod-shaped cathode ray tube and a liquid crystal shutter in this example, and is configured to selectively irradiate 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 a white level potential.

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. Not done. In addition, in the character print mode, the eraser 24 is used to print characters by setting the character part to a black level and setting a limited area around it to a white level in order to add a character to a specified area on the document. Process.

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

In this example, recording sheets are stored in two paper feed cassettes 11 and 12, and the paper is fed from one of the selected paper cassettes. 13 and 15 are paper feed rollers, 14, 16 and 1
8 is a feed roller, and 17 is a registration roller. The leading edge of the fed recording sheet touches the registration roller 17.
The photoreceptor drum 9 is stopped once in contact with the photoreceptor drum 9, and at a predetermined timing synchronized with the rotation of the photoreceptor drum 9 and scanning of the original image, the registration roller 17 causes the image to overlap with the visible image (toner image) on the surface of the photoreceptor drum 9. sent to.

When the recording sheet passes the position of the transfer charger 19, the visible image on the photosensitive drum 9 is transferred to the recording sheet. When the recording sheet passes through the position of the separation charger 20, the recording sheet is separated from the photosensitive drum 9 and guided to the conveying 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 conveyance route is used is determined by the state of the conveyance direction control mechanism 31 provided at the branch point. When the return path is selected, the recording sheet is transported to the intermediate tray 34 by the transport rollers 32 and the transport belt 33, and at a predetermined paper feeding timing, the recording sheet is transported to the intermediate tray 34 by the paper feeding rollers 35. Feed roller 3
The zero reversal path in which paper is fed to the position of registration rollers 17 via rollers 6 and 18 is used for double-sided copying and for aligning the sides of recording sheets to be ejected.

FIG. 2C shows the first carriage 99 section on which the illumination lamp 3 is mounted in some detail. Two scale support arms SA are fixed to the first carriage 99. These arms SA are located outside the end of the illumination lamp 3. When the carriage 99 is in the standby position (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, front and rear. 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 1049, and this spring force applies a counterclockwise rotational force to the arm 101, causing the arm 101 to move the scale 100. It is lifted upwards.

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

When the solenoid 103 is energized while the first carriage 99 is in the home position (the state shown in FIG. 2c), the arm 101 rotates clockwise, which causes the scale 10 to
0 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, during the partial erasure process, the solenoid 103 is energized, the illumination lamp 3 is turned on at a low intensity, and the carriage 99 is driven at a low speed in the scanning direction X in response to an operator's scanning instruction.

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

The first scale has a length of 300 mm from the image origin (equivalent to the length of the short side of A3 size paper), and a scale line (division line) is placed there.

1 scale (1 division) is 1 (2m), 0, 10, 2
0. ...The numerical value of 290 is marked every 5 scales, and in the area marked with the first scale, "R Nakazuke" is printed,
The area marked with the first scale is colored "blue" to indicate that it is used for erasing the image within the designated area.

The second scale 100b has the same unit division as the first scale 100a, but the origin is 300, and every 5 scales is 310,
320.・・・・The numerical value 600 is attached, and the area with this second scale is printed with “outside erase”, and the second
The area marked with a scale is used for erasing images outside the specified area (extracting images within the specified area).
It is said to be "red".

The eraser 24, a cross-section of the eraser 24 is shown in FIG. 4a.
is a rod-shaped cathode ray tube 240. which is long in the direction perpendicular to the plane of the paper. A reflecting mirror 242 whose cross section is approximately half an ellipse, and a filter 243 that matches the spectral distribution of the projected light to the characteristic spectrum of the photoreceptor. It is composed of a liquid crystal plate (liquid crystal shutter) 244 and a liquid crystal driver 245.

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 4 dots/1I11 light-transmitting segment electrodes (light-transmitting, non-light-transmitting control electrodes) arranged in two rows (row A and row B) in the direction along the axis of the photoreceptor drum 9, that is, in the width direction of the photoreceptor. ), which are used to express characters, and segment electrodes and continuous lead electrodes are printed on a transparent substrate. A transparent substrate on which group electrodes each having a length of several segments are similarly arranged in the width direction of the photoreceptor 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 ends (0,300) of the scale lines of the first graduation 100a and the second graduation 100b of the scale 100 are placed at the end of the segment electrode row of the liquid crystal shutter 244. To match, a conical protrusion 5Aa2 is formed on the arm SA (there are two protrusions on the front and rear of the arm SA, each with a protrusion), and one surface side has a small diameter on both ends of the Y-axis scale. The back side has large diameter truncated conical holes 100c1 and 100c2. When the solenoid 103 is energized, the Y-axis scale 100 descends onto the arm SA, but at this time the protrusion 5Aa2 enters the hole 100c2, and the Y-axis scale 10
0 positioning in the Y direction is performed. As a result, the Y-axis scale accurately matches the erase area of the eraser 24.

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 & stop key 45. r,” key 4
4', copy number display 46, copy number display 47
1 interrupt key 489 interrupt indicator 49. Paper feed force set selection key 502 Paper size display 51, 53. Paper feed selection display 5
2゜54, magnification adjustment keys 55U, 55D, magnification display 5
6. Copy mode B (character print mode) selection key 57
S, Mode B display 57L, Copy mode A (combination copy mode of two originals) selection key 58S, Mode A display 58L2 Fractional page (page... of the total number of pages) Print designation key 59S2 Fractional page print Display 59L 9th page print specification key 60S 1st page print indicator 60L 2nd page print position specification key 61S 1st page print position indicator 61L
1 to 61 L4, page print orientation designation key 62S9 page print orientation display 62L1 t 62L2 t scale print magnification designation key 63S2 magnification designation display 63L
, scale print designation key 64s, scale print designation display 64L2 character print information selection key 65S,
Information selection display 65L, fold print designation key 66S,
Sign print designation display 66L, movement designation key 70+x
g70X? 70+y and 70-y, movement amount display 71x.

71yp 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 11105L are provided.

When mode A is designated with the mode A designation key 58S, in the first copy, the recording sheet that has been fixed is conveyed to the return path and stored in the intermediate tray 34, and in the second copy, the recording sheet is stored in the intermediate tray 34. is automatically selected as the paper feed tray, and recording is performed again on the previous recording sheet. The mode A (multiple transfer) specification is cleared every time two copy cycles are completed, so if you specify it only once, the recording sheet will be ejected after two copy cycles are executed. .

Image editing processing (delete an area of the first document in mode A,
If a composite copy (in which a region of the 2M document is inserted) is required, the mode 8 designation key 58S is used.

When you press key 58S and scan specification key 105,
Area specification becomes possible. In this input mode, the details will be described later, but the operator moves the scale 100 in the exposure scanning direction and in the retardation direction using movement designation keys 70+x and 70-X.
- drive in the negative direction, stop at the desired X position, and read the desired Y position on the first scale (for middle erase) or second scale (for outer erase) of the scale 100, Enter the read value using the numeric keypad 44, and then press the numeric keypad manually.
Press tJ key 44'.

This operation is performed for two diagonal points (two positions on the X axis) of the 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 a character print mode (a composite copy in which a region of the document is erased in mode B and a predetermined text is inserted therein) is required, the mode B designation key 57S is used. In this case as well, area designation is performed in the same manner as in the image editing process described above.

In normal copy mode where modes A and B are not specified, these movement designation keys 70+x, 70X #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.

The page print designation key 60S is used to designate the number of pages to be printed.

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 page print position.
It is designated as one of the four corners of the recording paper, and 1
Each time the operation is performed, the display (lighting) changes from one of the displays 61L1 to 61L4 to the next, and the page print at the displayed position (lower cloth, lower left, upper right, upper left) is specified. be done.

The page print orientation key 62S specifies the orientation of page number printing, and can select one of vertical orientation and horizontal orientation.

The scale print designation key 64S is used to designate printing of scales on recording paper. When scale printing is designated with this key 645 and a 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 folding print designation key 66S is used to designate printing of a fold mark at the center of the recording paper. When fold-out printing is specified, "+" 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 the user operates the numeric keypad 44 while holding down the key 65S, the text specified by the numerical value entered using the numeric keypad 44 will be printed.

FIG. 4b shows the configuration of the eraser control unit 241. The control unit 241 includes a microprocessor 241A for controlling the entire control unit, and an R for temporary storage.
AM241D, ROM241E in which input character information and control information are stored in advance, input/output interface 24
1G.

2418.2411. a data bus that connects these, a decoder 241C that generates liquid crystal segment electrode activation signals from data from the input/output interface, a bidirectional buffer 241F for interfacing with the microprocessor 80 of the main control section (FIG. 5); Synchronous circuit 24
It consists of 1B.

The liquid crystal shutter 244 of the eraser 24 has a segment electrode array (columns A and B) in which light transmission control segment electrodes are arranged over the maximum copying width at a pitch of 4 dots/+sm per -column. 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 240 to the photoreceptor drum 9. Based on the information from the main control section (80 to 88 in Fig. 5), 2
energized in two control modes.

First, in the normal erase mode (J! erasing outside the document area and erasing a specified area within the document area), the selected segment electrode is
Both columns are energized at the same time (L level in FIG. 4d: non-erased area), and a translucent voltage (L level in FIG. 4d) is applied to the segment electrode in the erase area. During the energizing time 2T, the surface of the photoreceptor drum is 1. In the case of a mode that prints 0 character information, which is the time to move by dots (4 dots/■■).

As shown in Figure 4c, B located downstream from row A
The row is energized 7 hours later than the energization timing of the A row (H
Level: non-transparent energization).

One letter (including numbers for summer) has a vertical m dot and a horizontal m dot.
The segment electrode energizing voltage shown in FIGS. 4c and 4d is applied to the drum, which appears as one pulse per half-dot movement of the photoreceptor surface (T=L/photoreceptor circumferential speed). In the case of the mode that prints 0 character information generated in synchronization with the synchronization pulse, the A column write information is updated to that of the next line every two synchronization pulses, and the B column write information is updated to the next line information every two synchronization pulses. This is assumed to be delayed by T. In case of erase mode.

The write information for column A and the write information for column B are assumed to be the same, and are updated to that of the next line every two synchronization pulses.

Details of the image exposure shutter plate 200 are shown in FIGS. 6a and 6.
The image exposure shutter plate 200 shown in FIG. b is for the purpose of blocking light from the character print setting area of the original image from being projected onto the photosensitive drum 9. Exposure shutter plate 2
As shown in FIG. 6a, 00 is a light-shielding tape, which is wound around a loop 206 that is biased to rotate by a torsion spring. In FIG. 6a, the reel 206 is connected to the base 2.
15 and is supported. An idle roller 209 and a wire drive roller 208 are further pivotally attached to and supported by the base 215. A wire 207 to which the tip of the shutter plate 200 is fixed is stretched across these rows. An output shaft of a reduction gear 210 and a rotating shaft of a potentiometer 212 are connected to the wire drive roller 208 . A rotating shaft of a motor 211 is connected to an input shaft of the reducer 210 . When the motor 211 rotates forward, the wire 20
7 is rotationally driven clockwise to extend the shutter plate 200 to the original image exposure area, and when the motor 211 rotates in reverse, the shutter plate 200 is rewound onto the reel 206 and retreated from the exposure area.

The base 215 is pivotally attached to the frame of the copying machine, and when the solenoid 204 is energized, the base 215 rotates, and the shutter plate 200 extended by a wire 207 blocks the original image light.

When the solenoid 204 is de-energized, the shutter plate 200 is pulled out by the wire 207.

It is retracted from the original image exposure optical path and does not block light.

whether the shutter plate 200 enters the original image exposure optical path;
When MicroProprint is set, whether or not to evacuate the optical path is determined by the area specified for character printing (
During the main scanning direction (X), the solenoid 204 is energized to cause the shutter plate 200 to enter the exposure optical path. Also, when page print (upper right position or upper left position of M manuscript) is specified.

While exposure main scan X is within the page print range, solenoid 2
04 to cause the shutter plate 200 to enter the exposure optical path.

FIG. 6b shows the relationship between the original ORD and its projected position on the photosensitive drum 9 (slit shape indicated by a dashed line) and the shutter plate 200. The shaded area on the original δRD is the area that is shielded from light by the shutter plate 200. In this embodiment, the tip of the shutter plate 200 can be arbitrarily positioned to block light to any position in the Y direction with the X axis shown in FIG. 6b as the base point. In the main scanning direction.

By arbitrarily controlling on/off of the solenoid 204, light can be shielded in an arbitrary range.

Therefore, in this embodiment, it is possible to set light shielding in any area with the - side as the X axis.

When printing a page in the upper left corner of the original/manuscript ORD, the shutter plate 200 is pulled out to the roller 208, and the solenoid 204 is energized, and when the exposure scan (X) passes the page print area, the solenoid is turned on. 2
Turn off 04. When printing a page in the lower left corner, the shutter plate 200 is positioned slightly beyond the roller 209 and the solenoid 204 is turned on.When the exposure scan (X) passes the page print area, the solenoid 204 is turned on. Turn off.

When printing a page in the upper right corner of the original ORD,
Pull out the shutter plate 200 to the roller 208,
The solenoid 204 is kept de-energized. Then, when the exposure scan (X) reaches the page print area, the solenoid 204 is turned on. The solenoid 204 is turned off when the exposure scan passes the page print area. When printing a page in the lower right corner, the shutter plate 200 is positioned slightly closer to the roller 208 than the roller 209, the solenoid 204 is turned off, and when the exposure scan (X) reaches the page print area, the solenoid 204 is turned off. Turn on. Then, the solenoid 204 is turned off when the exposure scan passes the page print area. In this embodiment, text is printed in a direction along the Y axis with the X axis as the base point. The writing position in the X direction is arbitrary.

Motor 211 that drives the shutter plate 200 (Figure 6a)
is energized in forward and reverse directions by a motor driver 213 shown in FIG. The motor driver 213 is given the shutter plate 200 real position signal (analog) from the potentiometer 212 and the position designation signal (analog) from the D/A converter 214. The motor 211 is energized to rotate forward or reverse so that the signals match, and when both signals match, the motor 211
is the stop. The microprocessor 80 provides position designation data (position on the Y-axis) to the D/A converter 214.

whether the shutter plate 200 enters the original image exposure optical path;
The microprocessor 80 (FIG. 5) controls whether or not the optical path is evacuated depending on whether character and/or page printing is set. If character printing is set, character printing is performed.

During the specified range (main scanning direction X), the solenoid 204 is energized to cause the shutter plate 200 to enter the exposure optical path. Also page print ([upper right position or upper left position of manuscript])
is specified, the solenoid 204 is energized to cause the shutter plate 200 to enter the exposure optical path while the exposure main scan X is within the page print range.

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

Please refer to FIG. The main control unit is a microcomputer (CPU) 80. System controller 81. Counter 82. Read-only memory (ROM) 83. Read/write memory (RAM) 84° non-volatile read/write memory (NRA)
M)85. It consists of input/output ports (Ilo) 87, 88, etc.

For the power line of the non-volatile read/write memory 85.

A battery 90 is connected via a backup circuit 86. A power line from a power supply unit 89 is connected in parallel to a battery 90 via a diode. The above-mentioned eraser control unit 241 is connected to the input/output port 87, and the solenoid driver 205 for energizing the solenoid 204 that drives the image exposure shutter plate 200 and the motor 211 for forward and reverse energization are connected to the input/output port 88. A D/A converter 214 is connected to provide a position signal to a motor driver 213 that outputs a position signal. The input/output port 87 also includes a separation jam sensor, double feed detection sensor, P sensor, toner sensor, home position sensor of the carriage 99, other sensors and switch units, a jam indicator, an operation board (operation panel) 42, etc. 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 & Solenoid drivers etc. are connected.

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

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

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

In this case, the leading edge erase (full-width erase) is performed in the area from the leading edge of the copyable area to the leading edge of the original image (time Tl-T2), and the area where the original image exists (time T2 to T5) is erased.
), perform site erase ([erase areas other than the stripe width]) to erase the area from the rear edge of the original image to the rear edge of the copyable area (
At time T5 to T6), trailing edge erase (full width erase) is performed, which is almost always done in conventional general copying machines.

When erasing or extracting a specific area of a 1M document image for image editing (synthetic copying), it is necessary to further erase (erase an electrostatic latent image) within the area of the document image. That is, FIG. 7a shows the case of erasing an area, and the scanning direction (X direction) specified by time T3 to T4 is shown.
At the position, areas P1 to P2 in the width direction (Y direction) are erased. Since the eraser 24 is arranged so as to cover the entire area from 0 to M positions along the axis in the width direction, it is difficult to decide which area of the eraser 24 to energize/deenergize the segment electrodes.
By controlling , the erase area in the width direction is determined.

In the case of character information printing, page printing, or scale printing, the print area is not exposed to light (image light is blocked).
In order to do this, the position control of the image exposure shutter plate 200 is performed by the microprocessor 80.

In the case of the eraser 24, for example, the X direction is from T3 to T.
4. The Y direction is P1 to P2. You can also erase the area specified by , or vice versa, extract the specified area and erase the other areas. In that case, the eraser 24 may be controlled by the eraser control unit 241 by inverting the segment energizing signal level. Eraser control unit 2
41 is.

Erase area information from the microprocessor 80.

Character print information Receive 2 pages of print information, count the photoconductor drum synchronization pulses based on the exposure start signal, and record the exposed 9 character print areas in the busy race area (outside the recording paper width) (by shielding the character forming dots from light). A light-transmitting control electrode energizing signal for exposing the character background) and page recording (exposing the background while shielding the page number forming dots from light) is generated to control the energization of the eraser 24.

To further explain the image composition using the eraser 24, the eighth
As shown in the figure, a predetermined area 92 of a document 91 placed on a contact glass 1 is defined by two pieces of X coordinate information xi,
When specifying by specifying 2 and two pieces of Y coordinate information Ylyy2, specify area extraction/erasure (by eraser 24) for each coordinate, and perform the logical product (AND) of the two coordinate systems.
Considering the combination of and logical sum (OR), FIG. 9a.

Figures 9b, 10a, 10b, 11a.

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

FIGS. 9a and 9b show patterns obtained by logical product and logical sum of erasure of the area xl to X2 and the area y1 to y2, respectively, and FIGS. 10a and 10b show Each.

FIGS. 11a and 11b show patterns obtained by logical product and logical sum of erasure of area x1 to x2 and area extraction of y1 to y2, and FIGS. 11a and 11b respectively
FIGS. 12a and 12b show patterns obtained by the logical product and logical sum of the area extraction of x2 and the area deletion of y1 to y2, and FIGS. 12a and 12b show the area extraction of x1 to It shows a pattern obtained by logical product and logical sum of erasure with area extraction.

Other combinations of patterns are possible.

However, the probability that a special pattern will be used is small, and if there are many types of patterns, there is a possibility that the operator will make a mistake in operation.
Only two patterns, the one shown in the figure and the pattern shown in Fig. 12b, are adopted, and in the case of specifying area erasure (erasure within a specified area), the pattern shown in Fig. 9a is used, and the pattern shown in Fig. 9a is used. In the case of outer erasure), the pattern of FIG. 12b is used.

When editing images (image composition), it becomes necessary to move images in a specific area to an arbitrary position. This type of image movement can be easily performed by data processing in a digital copying machine equipped with a large capacity memory. However, since this is not possible with ordinary copy machines,
This embodiment uses the following means.

Since the rotation of the moving photosensitive drum in the X-axis direction is the reference, the scanning start timing of the optical and optical scanning system and/or the sheet feeding timing of the registration roller 7 are shifted from the standard timing synchronized with it. If the scanning start timing of the optical scanning system is advanced, the position of the image formed on the photosensitive drum 9 will be in the negative direction (to the left of 1!l) with respect to the document scanning direction (X) in FIG. 7a. If the image is moved to , and the scanning start timing is delayed, the position of the image moves in the positive direction (to the right in the figure) with respect to the document scanning direction.

Furthermore, if the sheet supply timing of the registration rollers is advanced, the recording sheet will be shifted to a position ahead of the normal position of the image on the photoreceptor, and the image will shift in the same way as when the 1M original scan start timing is delayed. If the registration roller sheet feeding (I) is delayed, two images will be moved in the same way as when the document scanning start timing is advanced. In this example, the images are moved by a relatively small distance. When this is done, only the document scanning start timing is shifted by 0.0 degrees, and when the moving distance becomes large, both the 1M document fixed scanning start timing and the sheet supply timing of the registration rollers 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. In Figure 7b, when the lens is at the position indicated by the solid line, each part of the document A, B and C
The light emitted from each part of the original reaches positions A, B, and C on the photoreceptor, respectively. However, when the lens moves to the position indicated by the two-dot chain line, the light emitted from each part A, B, and C of the original reaches two points. The light passes through the optical path indicated by the dotted chain line and reaches positions A', B' and C' on the photoreceptor, respectively. In other words, by moving the lens,
The positional relationship between the image on the document and the image on the photoreceptor 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 according to the result. When moving the image in the Y-axis direction, the amount of movement of the copy image is as follows: d is the amount of lens movement, and the magnification ratio is d. Let m be as follows.

D= (1+m)d In Figures 13a, 13b, 13c, 13d, 13e, 13f, and 13g, the microcomputer (CPU) 80 prints characters and synthesizes images. The operation will be explained with reference to each episode, which shows a general operation centered on the setting operation for. Note that the numbers of the processing steps to be explained are shown in parentheses.

When the power is turned on, each part is initialized (1), the status of each input port is read (2), and it is determined whether or not it is operable (3). If it is not ready, check whether there is an abnormality (4), and if it is normal, set the display to indicate an abnormality.After (5), until it becomes ready, proceed to (2).
-(3)-(4)-(2)-..., or (2)-(3
)-(4)-(5)-(2)--..., 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. The status of each part (key switches) is read (9), the status of the print start key 43 on the operation board 42 is checked (10), and if there is no start instruction, the status of the numeric keypad 44 is first checked (21a).

If there is no input operation on the numeric keypad 44, the process proceeds to FIG. 13b and checks the switch 58S (mode A) on flag and the switch 57S (mode B) on flag (24). Since this flag is cleared in the initial state, If the on-on flag is present, editing (mode A) or character printing (mode B) is instructed, so the process proceeds to step (25) and the scan key on flag is checked. Since this flag is also cleared in the initial state, if the scan key-on flag is present, designation of one editing area is instructed, and the process proceeds to the designated area reading control shown in FIG. 13e.

However, if there is no switch 58S (mode A) on flag and switch 57S (mode B) on flag, neither editing nor character printing is instructed, so move designation key 7
Checks 0 + x, 70 - L. If it is not on either, return to reading the status of the operation board 42 (9) and repeat this process. In other words, if no key is operated,
(8) −(9) −(lo) −(21) −(24
)(8)--..., the same process is repeated in a loop, waiting for a key to be pressed.

When movement key 70+x is pressed, step (90)
Next, the values of parameters T2 and T5 are each increased by 1 (91), and the minute time dT1 (for example, 0
．． After waiting (99) for 5 seconds), the process returns to step (9). Similarly, when movement key 70-x is pressed, following step (92), parameters T2 and T5 are
each value is decreased by 1 (93), and the minute time d
Step (9) after waiting for time T1 (99)
Return to When movement key 70+y is pressed, step (9
After step 4), the values of parameters S1 and S2 are each increased by 1 (95), and after waiting for a minute time dT (99), the process returns to step (9). When the movement key 70-y is pressed, after step (96), the values of parameters St and S2 are each decreased by 1 (97), and after waiting for a minute time dT1 (99), step Return to (9).

In other words, if you operate the movement designation key in this case (edit/print not instructed state), the parameters T2°, T5. The values of Sl and S2 can be updated. These parameters correspond to the original image copy area, with reference to FIG. 7a. Therefore, by operating any of the movement designation keys, the area where the leading edge erase, site erase, and trailing edge erase are performed is adjusted.

Also, although not shown in the drawings, at the same time as these parameters T2 and T5 are updated.

The image is moved in the X direction, that is, the scanning start timing of the optical scanning system is updated. Furthermore, as the parameters S1 and S2 are updated, the image is moved in the Y direction, that is, the lens 7 is moved in the Y direction. The amount of movement is
The movement amount indicators 71x and 71y on the shaking board 42 display numerical values.

*When the mode 8 designation key 58S is pressed, the process proceeds to 116 in FIG. 13F, and the state of the switch 583 on flag changes (117 to 119). In other words, in the initial state, key 5
When 8S is pressed, the switch 58S on flag is set (117°119), and when the key 58S is pressed while the on flag is set, the on flag is cleared ('117.'118).

When the switch 583 on flag is set, the process proceeds to step (25) after step (24), where the scan key on flag is checked. When the scan key 105 is pressed while the switch 588 on flag is set, the scan key on flag is set in steps similar to steps 116 to 119 (not shown).

Scan key 10 when scan key on flag is present
If 5 is pressed, the flag is cleared).

**When the mode B designation key 573 is pressed, the process advances to 120 in FIG. 13f, and the state of the switch 573 on flag changes (121 to 123). That is, when the key 573 is pressed in the initial state, the switch 573 on flag is set (121°122), and when the key 57S is pressed while the on flag is set, the on flag is cleared (121). , 123).

When the switch 573 on flag is set.

After step (24), the process proceeds to step (25), where the scan key-on flag is checked.

**If there is a switch 583 on flag or a switch 588 on flag and the scan key on flag is set, the movement is specified in steps (26) and (36) of Fig. 13c via steps (24) to (25) (Fig. 13b). Keys 70+x and 70-x are checked to be on. If the movement designation key 70 + x is turned on here, 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 + If not, scanning drive is possible, so the solenoid 103 is energized (this causes the scale 100 to ride on the arm SA on the carriage 99 (Figure 2b)), and the lamp 3 is set to low illuminance lighting (39). . Next, the solenoid 103 is energized to wait for the time dT1 until the scale 100 is placed on the arm SA (30), and the carriage 99 scanning motor 106 (Fig. Synchronous pulse generator 1 that generates electric pulses in conjunction with movement
07 (FIG. 5) starts counting up the generated pulses (31). Next, set the carriage scan flag (
32). After starting the scanning drive of the carriage 99 in this way, step (
27) Proceed to -(2g). Count value is limit value L
When MP is reached, the process proceeds to step (34) where the motor 106
and clears the carriage scanning flag (35).

When the movement designation key 70+x changes from on to off, the process proceeds to steps (26) - (33) - (34) - (35) and stops 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 the carriage return flag is set (40). After starting the return drive of the carriage 99 in this way, it is necessary to turn on the movement designation key 70-X. During, step (37) -(3g-
■) and proceed. The count value is the home position HP value (
0), the process proceeds to step (42) and the motor 106
and clear the carriage return flag (43
). When the movement designation key 70-x changes from on to off,
Steps (36) - (37) - (42) - (43)
Then, the motor 106 is stopped in the same way.

With the scale drive control described above, the operator presses switch 585 or 57S to set mode A (edit mode) or mode B (character print mode),
Press the scan key to set the scale drive mode,
Next, when the movement designation key 70+X is pressed, the scale 100 is supported by the carriage 99, the illumination light is turned on at a low intensity, 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. Movement designation key 70+
When you release x (off), the scale stops there. When the movement designation key 70-x is pressed, the scale 100 moves in the return direction, and when the movement designation key 70-x is released (off), the scale stops there. In any case, the solenoid 103 is energized and the illumination lamp 3 is lit at low brightness from the moment the movement designation key 70+x is pressed until the scale scanning mode is canceled by pressing the scan key 105 again. You can see the scale projection image on the manuscript.

The operations required for inputting the erase area (mode A) and print area (mode B) by the operator are now summarized as follows.

1° switch 58S or 578 on.

2° scan designation key 105 on.

3. Move designation key 70 + x on (then press 7 as 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
Enter 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 "," key 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.

Turn on the 7° scan designation key 105 again to cancel the scale scan 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, the numerical value assigned to the key pressed in step (22) of FIG. 13a is read into the numerical register. Next, when the "," key 44' is turned on, the process proceeds from step (44) to step (45) in FIG. 13c, where step 4. Up to the operation, i = Q, so proceed to step (46) and change the contents of the numerical register to Yf
Also, the scale scan count value (scanning position detection value) is stored in the Xf register, and in step (47)
=1, wait for the dTl time to elapse in step (48), and then return to operation board reading (9). That is,
The operator moves the scale 100 to a desired position, inputs the scale value using the numeric keypad, and presses the "," key 44.
When you press ', the numeric keypad manual force value is stored in the Yf register, and
The scale position at that time is set in the Xf 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
), set the contents of the numerical register to Y, register, and scale position to XJ! Set it in the register 49), reset i to 0 50a), and set a read end flag indicating that the input of one area has been completed (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 105 is pressed, this is read by Stesive (9) and the scan key on flag is cleared, and in response, control proceeds from step (25) to step (58) in FIG. 13b. Scale scanning end processing step (5g
) -(59) -(60) -(61), return the scale lOO to the home position HP and close the solenoid 10.
3 and turns off lamp 3. And then the 13th d
The erase area shown in the figure is set, or the print area shown in FIG. 13e is set.

First, the setting of the erase area will be explained with reference to FIG. 13d. First, if there is a switch 588 on flag (mode A
If is set = 62) Check the presence or absence of the erase set flag (flag indicating that steps 71 to 81b: of setting the erase area have been executed), and if it is not set (not set), the read ends. The presence or absence of the flag (50b) is referred to. If there is no read end flag, the area coordinate data has not been input yet, so proceed to the key-in process shown in FIG.
Compare the contents of register Yf with 300. If the content Yf of the Yf register is less than 300, the numerical value is input based on the first graduation 100a of the scale 100, so
Assuming that "Nakazuke" is specified, steps (72)~
After the area determination in (77), steps (78a) to (8)
In 1a), erase the image within the specified area (erase area setting)
Do this. In this case, in step (72), the content Y2 of the register is also compared with 300 to see if it is an input value based on the first scale 100a. If Y is less than 300, both of the two input points will be 10 on the first scale.
Since it is based on 0a, the calculated values AYf and A
Let Y be Yf and Yj, respectively. , YjL is 30
If it is 0 or more, the coordinates input later will be 100 on the second scale.
b (external cancellation), but in this case, what is input to the light is given priority and the calculated values AYf and AYj are set to Yf and Y, -300, respectively.

That is, the value input later is updated to the value based on the first scale 100a (steps 72 to 74).
In steps 75) to (76), the designated area range corresponding to the eraser 24 is added to set one image erasing area (78a) to (81).
a), that is, the position on the X coordinate within the range indicated by the contents of register Xf and the contents of register XQ, AYf and AY
Eraser control data is set so that erasing is performed within a rectangular area specified by the position on the Y coordinate within the range fl.

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 is input based on the second scale 100b of the scale 100, so it is assumed that "external cancellation" is instructed, and steps (83) to (8B) are performed. ), step (7) is performed.
Steps 8b) to (81b) erase the image outside the specified area (erase area setting).
), the content YJI of the Y register is also compared with 300 to see if it is the input value based on the second scale 100b. If Y is 300 or more, both of the two input points are based on the second scale 100b, so the calculated values AYf and AY are changed to Yf-300 and Y, respectively.
-300.

If Y is less than 300, the coordinates entered later will be the first
In this case, priority is given to what is input to the light, and the calculated values AYf and AY are set to Yf-300 and Yjl, respectively (step 72). ~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 (7
8b) to (81b).

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

In step 62 of FIG. 13d, if the switch 583 on flag is not present (not in mode A) or if the erase set flag is present (setting of the erase area in mode A has been completed), the process advances to step 66 to proceed to the next area. To enable value setting, clear the erase set flag and check the switch 573 on flag (67). If this flag is present, mode B is set, so the 13th
Proceed to print area settings in figure e.

FIG. 13e shows the print area setting operation in this embodiment. This is similar to the setting of the erasure area (or extraction area) in image composition (Figure 13d) described above, but since the Y-axis range of the print area is based on Y=0,
= From O to the larger value of the input Y coordinate value (Yn or Yf)
The difference is that it is set to . The setting in the X-axis direction is the same as in FIG. 13d.

When the print area is set as described above, in print copying (mode B), in one copy cycle,
The image exposure shutter plate 200 blocks the image light in the print area, and the eraser 24 writes character information in that area.
When page writing is designated, the shutter plate 200 blocks light from the designated position, and the eraser 24 writes there the page number or the page number (fraction) in fraction format.

Edited by the operator's operations and the control of the microprocessor 80 as explained above! A (mode A) erase area setting and/or character writing area setting (mode B) will be performed. It should be noted that when setting the area in mode A, whether to erase the inside or outside of the specified square area is determined by the manual force value of the numeric keypad when first specifying the l corner of the square area. In general, the first scale 100a and the second scale 100b of the scale 100 have different scale values, and different processing modes (
The processing mode is automatically set according to the manual input value of the numeric keypad. The operator does not need to perform key operations to specify the mode (chuzuke, gaizu).

When the print start key 43 is pressed, step (1)
0) -(11) -(12) -(13) -(14
) --(8)-(9)--..., or step (10
) - (14) - . . . to perform the copy process. "Start cycle processing J (12) performs the processing necessary to start the copy process.

The majority of the copy process, including the control of the eraser 24,
"1 copy processing J (13)" is carried out. That is, the timing pulse (not shown) that is output every minute rotation of the photosensitive drum 9 is constantly counted, and the timing is grasped by checking the value. The control of the eraser 24, which performs control according to each timing, starts from the timing T1 of the tip erase.Every time the erase area changes, that is, in mode A, the timings T1, T2, T3, . T4.T5 and T
6, the data set in the eraser driver 245 is updated.

In the print mode (mode B), the eraser control unit 241 starts counting drum pulses from the start of exposure, and when the character printing start timing arrives, the text number given in advance by the processor 80,
The text information specified by is read out one line at a time in 2T cycles and given to the liquid crystal driver one line at a time for energizing column A.

Information obtained by delaying the information on each line by T is given for energizing 8 columns, and for each line. Then, the number of lines (length of text in the main scanning direction) from the start to the end of outputting information for each line is counted, and the count value is provided to the processor 80. The processor 80 positions the shutter plate 200 at a set position before starting the copy cycle.

When a copy cycle is started, the shutter plate 200 is driven to the exposure cut-off position at the timing when the character print start position arrives, and then the shutter plate 200 is retracted from the exposure optical path after the drum has rotated by a number equivalent to this count value.

The ROM 241E of the control unit 241 (FIG. 4b) stores text information for each number. A number entry specifying a piece of textual information is read in steps 21d and 21e of Figure 13a.

In other words, the numeric keypad 44 is pressed while the switch 65B is pressed.
When is operated, this numeric keypad manual is stored in the text No. register, and 1 copy processing in mode B (13)
When the data enters, it is read out by the microprocessor 80 and provided to the control unit 241. Control unit 241
When scanning enters the print area, the image information (pixel) for each line of text information is given to the LCD driver 245 based on this information.0 When the page print switch 588 on flag is present,
The microprocessor 80 performs one copy processing (13: first
In FIG. 3a), the number of pages (M document replacement number) in the orientation specified by the switch 62S is printed at the position specified by the switch 61S.

This provides page print area data and print character data (including posture data) to the erase control unit 241 before starting exposure, provides shutter plate position data to the D/A converter 214, and starts exposure scanning when the copy cycle starts. This is done by giving a signal to the solenoid driver 205 to drive the image exposure shutter plate 200 to the light blocking position when the page print position is reached. The processing when the fractional page print switch 595 on flag is present is the same as the page print processing described above, but the control unit 241
The difference is that the print information given to the document is the number of document replacement times/set number of document sheets.

Note that since page printing and fractional page printing are performed alternatively, steps 124 to 1 in Figures 13f and 13g are performed.
27 and steps 128 to 130, when 5-page printing is set, the switch 608 on flag is set and the switch 598 on flag is cleared, and when fractional page printing is set, the switch 59S on flag is set and the switch 608 on flag is cleared. I have to.

Scale print settings are from step 141 of step 13g.
143 and is completed by setting the switch 648 on flag. When proceeding to the 1 copy process (13) with this flag set, the microprocessor 80 sends area data and scale magnification for printing scales on the left margin and bottom margin of the document, respectively, to the control unit 241. Furthermore, before and after the start of the copy cycle, the position and advance/retreat of the shutter plate 200 that blocks light from the left margin and bottom margin of the document are controlled.

The control unit 241 controls the area indicated by the area data.

The driver 245 creates information to print the scale data stored in the ROM 241D at a specified magnification.
give to

The fold print settings are performed in steps 149 to 13g in Figure 13g.
At step 151, the switch 668 on flag is set and the process ends. When this flag exists, the microprocessor 80 gives the fold position data and the fold print instruction data to the erase control unit 241 in the 1 copy process (13), and in the copy cycle, the microprocessor 80 gives the erase control unit 241 the fold position data and the fold print instruction data.
0 to block light from the area specified by the fold position data (the center of the recording paper).

The control unit 241 stores the ROM in the area indicated by the fold position data ([the upper margin and the lower white part at the center of the width of the document in the X direction].
Information for printing the signature mark "+" stored in 241D is created and given to the driver 245.

Setting of various flags based on key-in is shown in FIGS. 13f and 13g. Note that these drawings show only one part related to the implementation of the present invention.

For example, in the process in response to pressing the double-sided copy instruction switch 67S, whose control flow is not shown, when this switch is pressed, the presence or absence of the switch 678 on flag is checked, and if it is not, the flag is set. The display 68S lights up. When the switch 673 on flag is present, it is cleared and the indicator 68S is turned off. When proceeding to the copy process (13) with the switch 678 on flag, the microprocessor 80
When copying the K document, the erase area (set in the flow shown in FIG. 13d) is erased, and when copying the second document, instruction data to erase outside the erase area is given to the erase control unit 241.

Further, when copying the first J7i document, paper transport control is performed to send the recording paper to the intermediate tray, and when copying the second original, paper transport control is performed to supply the recording paper from the intermediate tray and send it out to the paper discharge tray.

In the copy process without the switch 573 on flag and the switch 583 on flag, steps (91), (93), (95), and
Recording paper area adjusted in (97) [(51, T2),
(52, T5): If there is no adjustment, 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.

1. Normal copy mode: When the operator presses the print key 43 with the double-sided copy designation display 683 shown in FIG. , the magnification set using the magnification adjustment keys 55U and 55D is copied. Since this copy control operation is well known, detailed explanation will be omitted.

2. Duplex mode: When the operator presses the switch 67S, the display 67L lights up. 1. With the display 67L lit, the operator presses the print key to copy the first original.

The copy is stored face down in the intermediate tray. Next, the operator sets the second original and presses the print key. A copy is obtained in which the second original is recorded on the back side of the copy of the first original.

3. Mode B copy mode: When the operator presses the switch 57S, the display 57L lights up (Mode B setting) 6. After the display 57L lights up, when the scan key 105S is pressed, the display 105L lights up (Scan Mode setting), the operator operates switches 7°±x and 70±y in this state to adjust the scale to 10°.
0 to the required position, and use the numeric keypad 44 to press y position I5 [(
scale) and press switch 44'. This causes the coordinates of the first corner of the print area to be read into the copier. Next, the operator also switches 70±x, 70
Operate ±y to drive the scale 100 to the desired position,
Enter the y-coordinate (scale graduation) using the numeric keypad 44 and press the switch 44'', thereby reading the coordinates of the second corner (diagonal corner) of the print area into the copying machine.Next, when the operator presses the scan key 105S, the operator presses the scan key 105S. Display 105
L goes out and the carriage 99 returns to the home position. When the operator inputs a numerical value using the numeric keypad 44 while holding down the information input switch 65S, the numerical value is read into the copying machine as print text designation data. When the operator presses the print key 43, the specified text is printed in the specified area of the document.
A copy written at the copy setting magnification is obtained.

4. Copy mode of mode A: When the operator presses the switch 58S, the display 58L lights up (mode A setting). Erase area (or extraction area)
The settings are as in 3. above. Do the same thing. However, in this area setting, it depends on whether the first scale or the second scale of the scale 100 is used.

It is determined whether to erase the inside or outside of the setting area. 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 stored in the intermediate tray. When you set the second original and press the print key 43, the copy on the intermediate tray that erases the area inside (or outside the setting area) of the first original is added to the copy that erases the area outside (or inside) the area of the second original. A composite copy of the erased image is obtained.

5. Combined mode of modes B and A: The operator uses 3. above. After performing the input operation of and the input operation of 4 degrees above, press the print key 43, and then
After completing the copying of the M document, the switch 57S is operated to turn off the indicator light 57L, and the second document is copied.

Or 4 above. 1J)! Copy the draft, then perform the input operations described above at 3° to make a second copy.

6. Above 2. and 3. Combined use mode: The operator uses the above 2. After performing the input operation of and the input operation of 3 degrees above, press the print key. You will get a copy with the same text printed on the front and back. After copying the first draft,
Further, when the operation 3 is performed, another text is printed on the copy (back side) of the second original.

7. Above 2. and 4. Combined use mode: Composite copy of two originals (1st and 2nd original) on the front side,
It is also a mode that makes a composite copy of two originals (third and fourth originals) on the back side, but in this mode, the front side of the duplex mode is copied in mode A, and the back side is copied in mode A.
All you have to do is 3. above for each copy of the front and back sides. requires input operations. One of the front and back surfaces can be set to mode A release.

8. 2 above. and 5. Combination mode: In duplex mode copying, the above 5. is used for both front side copying and back side copying. Perform input operations.

9. Page print mode: The operator performs the above 1. ~8. In addition to the mode setting operation, press the switch 60S to light the display 60L,
Display device 61L that indicates the desired position by operating the switch 61S
1 to 61L4 are lit. Further, the user operates the switch 62S to light up the display 62L1 or 62L2 indicating the desired number of pages and the print orientation. When you press the print key 43,
The number of original replacements is printed at the set position in a fixed position 1a, and the number of times the original is replaced is printed in the set position, and the number of times the original is replaced is printed in the fixed position 1a. ~8. A copy with the image determined by the mode is obtained.

10. Fractional page print mode: The operator performs the above steps 1° to 8. In addition to the mode setting operation, the user presses the switch 59S to turn on the display 60L, and while keeping the switch 59S pressed, operates the numeric keypad 44 to input the number of original sheets.

Display device 61L that indicates the desired position by operating the switch 613
1~61L4 is turned on. Further, the user operates the switch 62S to light up the display 62L1 or 62L2 indicating the desired number of pages and the print orientation. When you press the print key 43,
The image is printed at the set position in the orientation set by [number of originals replaced/number of input originals], and the above 1. ~8. A copy with the image determined by the mode is obtained.

11. Scale print mode: The operator performs the above 1. ~10. In addition to the mode setting operation, the switch 64S is pressed to light up the display 60L. When scale printing at the set copy magnification is fine,
Press the print key 43 as it is. When you want to change the scale magnification, press the switch 63S to change the scale magnification.
8 is turned on, and the scale recording magnification is input by operating the numeric keypad 44 while holding down the switch 63S. When the print key 43 was pressed, a scale was printed on the left margin and bottom margin of the recording paper. Above 1. A copy in which an image determined by a mode of 1 to 10 is recorded can be obtained.

12° fold section print mode: The operator performs the above 1. ~11. In addition to the mode setting operation, the switch 66S is pressed to light the display 66L. When the print key 43 is pressed, "+" marks are printed in the upper and lower margins of the center of the recording paper in the exposure scanning direction, and the above 1. A copy in which an image determined by the modes 1 to 11 is recorded can be obtained.

In the embodiments described above, the scale 100 is mounted on the exposure scanning carriage 99.

The scale 100 is driven in the exposure scanning direction and stopped at the desired exposure scanning position, and the coordinate information of one axis is input using the numeric keypad 44 and comma key 44', and the coordinates of the other axis are read as carriage position information. By this, corner coordinates are input to specify the area, but referring to the scales 41
You may input it as 4 or the like.

Furthermore, in the above embodiment, the liquid crystal shutter 244 of the eraser 24 has light transmitting control electrodes arranged in two rows of 4 dots/IIIm, but this number of rows may be further increased if the number of zero rows is increased. In addition, the relationship shown in FIG. 4c is such that the energizing signal for the light-transmitting control electrode array on the downstream side is delayed by T from the energizing signal for the immediately preceding transparent control electrode array on the upstream side.

(Effect) In any case, in the present invention, the eraser 24 is selected as the erase light source 241 and the first liquid crystal shutter 244, and the liquid crystal shutter 244 is selected as each electrode with light transmission control electrodes arranged in the width direction of the photoreceptor. Since the erase width in the width direction of the photoreceptor can be controlled by applying a transmissive control voltage, the shutter plate 200 can also control the erase width in the width direction of the photoreceptor. Since light is blocked, erase areas can be defined in relatively small units, characters can be recorded in positive dots, and accurate character print areas can be determined according to the arrangement of one character. The background of the character print is white, the original image does not overlap the printed character, and the printed character does not disappear due to white exposure of the original. Even if the erase area is defined in small units and characters are printed in this manner, the segment electrodes and extraction leads can be finely arranged and wired using printed wiring technology, making it possible to connect individual light emitting diodes with leads. Complex electrical connections can be omitted and lead wiring can be made more compact.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the appearance of an embodiment of the present invention. 2a is a longitudinal sectional view of the copying apparatus shown in FIG. 1;
The figure is an enlarged sectional view showing elements around the photoreceptor drum, 2nd cl! 1 is a partially enlarged sectional view showing details of the illumination lamp 3 shown in FIG. 1, and FIG. 2d is a plan view of the scale 100 shown in FIG. 2c. FIG. 3 is a partially enlarged plan view showing 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. FIG. 6a is a side view showing the support structure for the shutter plate 200 shown in FIG. 2a, and FIG. 6b is a plan view showing the arrangement relationship among the original, the photosensitive drum, and the shutter plate 200. FIG. 7a is a plan view showing the relationship between the copyable area on the photosensitive drum and the area included therein. No. 7b'@ is a plan view showing the optical positional relationship of the original, the lens, and the 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. Figures 11a, 11b, 12a and 12b
The figure is a schematic diagram showing different patterns formed by combinations of designated areas and erase areas. 13a, 13b, 13c, 13d, 13a, 13f and 13g. 6 is a flowchart showing a schematic operation of the microcomputer 80 shown in FIG. 5. FIG. 1: Contact glass 2: Pressure plate 3: Illumination lamp 4: First mirror 5: Second mirror 6: Third mirror 7: Lens
8: Fourth mirror 9; Photosensitive drum 10: Developer unit 11.12: Paper feed cassette 13.15: Paper feed roller 14.16.18: Feed roller 17: Registration roller 19: Transfer charger 20
: Separation charger 21: Fixing unit 20: Separation charger 21: Fixing unit 22: Cleaning unit 23: Charging charger 24: Eraser 240: Cathode ray tube (erase light source) 244: Liquid crystal shutter (liquid crystal shutter) 245: Liquid crystal driver ( 241: Liquid crystal shutter control unit (liquid crystal shutter control means) 31: Conveyance direction control mechanism 32: Conveyance roller 33: Conveyance belt 34: Intermediate tray 41x: X scale
41y: Y scale 42: Operation board 43 Niblint start key 44: Numeric keypad 46; Set number display 70+x, 70-x, 70+y, 70-y: Movement designation key 44 #70 + x, 70 x, 70 + y
, '7o y: (area input means) 47: copy number display 71+x, 70+y: movement amount display 200: shutter plate 204: solenoid (second shutter plate driving means) 20
5: Solenoid driver (second shutter plate drive biasing means) ORD: Original 80: Microcomputer 80~
88: Copy control unit (shirt, plate control means) 99: First carriage 100 scale 100a: first scale 100b: second scale 101,
SA Niscale support arm 102: Axis 103: Solenoid 104
: Tension coil spring 105 Niscan instruction key 106 : First carriage drive motor 107 : Synchronous pulse generator 206 : Torsion spring reel 207 : Wire 208 : Drive roller 209 :
Idle roller 210: Reducer 211: Motor (first
(shutter plate driving means) 212: Potentiometer 213: Motor driver (first shutter plate driving biasing means) 215: Base

Claims (1)

[Scope of Claims] Charging means for uniformly charging the photoreceptor; exposure means for forming an electrostatic latent image by projecting light corresponding to the optical image of the original onto the charged surface; and a developer for developing the latent image. In a copying apparatus comprising: an area input means for inputting an area on a document image; 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 liquid crystal shutter in between, in which light-transmitting control electrodes are arranged in a divided manner in the width direction; a liquid crystal energizing means for selectively applying a light-transmitting setting voltage and a light-blocking setting voltage to each of the light-transmitting control electrodes of the liquid crystal shutter; Liquid crystal shutter control means for supplying erase biasing information and print information of the area input by the area input means to the liquid crystal biasing means; A shutter plate that can move forward and backward in the exposure optical path of image light onto the photoconductor; A first shutter plate driving means that drives the shutter plate in the Y direction; A second shutter plate driving means that drives the shutter plate in the exposure optical path; a first shutter plate drive biasing means for biasing the shutter plate drive means to position the shutter plate at a designated position; a second shutter plate drive biasing means for biasing a second shutter plate drive means; and Shutter plate control means for instructing the first shutter plate driving biasing means to move the shutter plate in the Y direction and for instructing the second shutter plate driving biasing means to advance or retreat the shutter plate; Print addition copying device.