JPS63141075A - Electrophotographic copying machine - Google Patents

Abstract

PURPOSE:To obtain a well-balanced both-surface copy by providing a data imprinting control means which sets a data imprinting position to a prescribed position different from the data imprinting position of surface copying automatically and imprints data when the reverse surface of the both-surface copy is copied. CONSTITUTION:This copying machine is equipped with a both-surface copying control means which turns over and conveys copying paper after top-surface copying to a copying means again and taken an copy on the reverse surface of the copying paper, a data imprinting means which imprints data on a photosensitive body at the time of copying by the copying means, and the data imprinting control means which sets the data imprinting position automatically to a prescribed position different from the data imprinting position of top-surface copying and allows the data imprinting means to imprint data. When a both- surface copy is taken, the data imprinting position for the reverse surface is changed automatically in correspondence to the data imprinting position of the top-surface copying. The trouble in specifying the imprinting position for each copy is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electrophotographic copying machine equipped with a double-sided copying function and a data circulation function.

(Prior Art and Problems to be Solved by the Invention) In recent years, in electrophotographic copying machines, when exposing an original image on a photoreceptor, a predetermined portion such as the edge of the screen is shielded from light by an optical path shutter. Data such as the date is imprinted on the area using a writing head such as a light emitting diode (LED) array.
Various types of copying machines have been proposed or provided that produce an image that combines the original image and this data.
For example, see Japanese Unexamined Patent Publication No. 130782/1982 by the present applicant).

Further, some electrophotographic copying machines are equipped with a double-sided copying function (for example, Japanese Patent Application No. 157699/1983).

If this electrophotographic copying machine is combined with a conventional data transfer mechanism (for example, Japanese Patent Laid-Open No. 130782/1982), when imprinting the page number on a double-sided copy, the imprinting position of the data (page number) is must be changed left and right between the front and back sides. In this case, it is necessary to designate the data imprinting positions so that the distances from the corners are the same, for example. In this way, when it is necessary to change the imprint position between the front and back sides, it is time-consuming to specify the imprint position for each copy.

An object of the present invention is to provide an electrophotographic copying machine that can automatically change the data imprinting position between the front and back sides of a double-sided copy.

(Means for Solving the Problems) An electrophotographic copying machine according to the present invention includes a copying means for copying by an electrophotographic method, and a copying paper whose front surface has been copied by the copying means, which is reversed from front to back. Transport it again to the copying means,
a double-sided copy control means for copying on the back side of copy paper; a data imprinting means for imprinting data onto a photoreceptor when copying by the copying means; The present invention is characterized by comprising a data imprinting control means for automatically setting an imprinting position to a predetermined position different from a data imprinting position in surface copying and causing the data imprinting means to imprint data.

(Function) During double-sided copying, the data imprint position on the back side is automatically changed in accordance with the data imprint position on the front side.

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiments) Hereinafter, embodiments of the present invention will be described in the following order with reference to the accompanying drawings.

(a) Copying machine configuration (b) Double-sided copying and composite copying (c) Operation panel (d) Copying machine control circuit (e) Data imprinting mechanism (J) Editor (g) Double-sided copying and data forwarding (h ) Composite copying and data forwarding (i) Binding margin creation and data forwarding (D Copying machine main body control flow (k) Editor control flow (a) Copying machine configuration First, a copying machine according to an embodiment of the present invention The overall configuration will be explained together with its copying operation.

As shown in Figure 12, this copying machine has a copy paper storage section and a paper feed section in the lower part, and an intermediate tray unit (right above the copy paper storage section).
A) Since the image forming section centered on the photoreceptor drum (2) is installed in the middle section and the optical system (1) is installed in the upper section, the copy paper after copying is sent to the intermediate tray unit (A) and then reused. Double-sided copying is possible by feeding paper.

Composite copying is possible.

The photosensitive drum (2) is rotatable in the direction of the arrow (a), and around it are a charger (6) and an inter-image eraser (
200), liquid crystal shutter (210), LED writing head (1250), magnetic brush type developing device (3), transfer charger (5a), separation charger (5b), blade type cleaning device (4), eraser lamp (7
) are arranged sequentially. The photoreceptor drum (2) is indicated by the arrow (
As it rotates in the a) direction, it is uniformly charged by the charging charger (6), receives image exposure from the optical system (1), and forms an electrostatic latent image, and this electrostatic latent image is transferred to the developing device (3). is developed into a toner image by LCD shutter (210)
can block the image exposure to the photoreceptor drum (2), and the LE
The D write head (1250) can write in areas where image exposure is blocked.

The optical system (1) is located below the document platen glass (16) with an arrow (b).
) direction, an exposure lamp (lO), movable mirrors (11a), (llb), (l lc),
It consists of an imaging lens (12) and a fixed mirror (lid). Exposure lamp (lO) and movable mirror (11
a) is (V/+u) (however, m:
move integrally in the direction of arrow (b) at a speed of (copy magnification),
The movable mirrors (1lb) and (11c) move integrally in the direction of arrow (b) at a speed of (V/2m). In addition, along the moving direction of the optical system, erase switches 5W52. Fixed position switch 5W50. An image leading edge switch 5W53 and a registration switch SW51 are provided at predetermined positions.

On the other hand, the copy paper storage section is located in the upper elevator-type storage section (
42) and a lower cassette type storage section (43). The copy paper in the storage section (42) is fed by the paper feed roller (18)
Due to the rotation of the paper feed roller (19), the copy paper in the storage section (43) is selectively separated by one of the separation rollers (20), (21'), (22), and (23).
) and are fed one by one to the transport roller (29).
, (30), (31), (24), (25).

(26), (27), (28) and (32), (33)
, (34) to the timing roller pair (13).

After the copy paper is temporarily stopped by a pair of timing rollers (13), it is sent to a transfer section in synchronization with the image formed on the photoreceptor drum (2), and then transferred to a transfer charger (5).
The toner image is transferred by the discharge of a), and the toner image is transferred to the photoreceptor drum (2) by the discharge of the separation charger (5b).
The toner image is separated from the surface of the toner image and sent to a fixing device (9) by a conveyor belt (8) equipped with an air suction means (8a), where the toner image is melted and fixed.

A pair of transport rollers (
A lever (41) for switching the conveying path of the copy paper is installed between the pair of discharge rollers (14) and the pair of discharge rollers (15). If you want to eject the copy paper as is, press the lever (
41) is set in the state shown by the dashed-dotted line in FIG.
) onto the tray (36). In addition, when performing double-sided copying or composite copying, the lever (41
) is set as shown by the solid line, and the copy paper is placed on the transport roller pair (
35) into the intermediate tray unit (A) through the guide plate (37).

On the other hand, residual toner is removed from the photoreceptor drum (2) after transfer by a cleaning device (4), and an eraser lamp (7) removes residual toner from the photoreceptor drum (2).
) The residual charge is removed by light irradiation, and the paper is prepared for the next copying.

(b) Double-sided copying and composite copying Next, double-sided copying using the intermediate tray unit (A) will be explained (in this embodiment, the method disclosed in Japanese Patent Application No. 153117/1988 by the applicant of the present invention is used). ).

The intermediate tray unit (A) is composed of a switching block, a transport block, a reversing block, an alignment/intermediate tray block, and a paper refeeding block.

The switching block is composed of transport rollers (50), (51), and a switching lever (59). The switching lever (59) is switched depending on whether or not the paper should be reversed.

Note that this switching block may be provided on the copying machine main body side without being provided on the intermediate tray unit (A).

The transport block includes transport rollers (52), (53), (
54), (55), and guide plates (86) and (87), and conveys the paper in the case of reverse copying.

The reversing block is composed of reversing conveyance rollers (56), (57) and a reversing guide (not shown), and reverses the copy paper conveyed through the conveying block and transfers it to the intermediate tray (58).
) has the function of sending it up.

The alignment/intermediate tray block is composed of an intermediate tray (58), a slide rail, a slide member, and a regulating plate (not shown), and has a function of aligning copy sheets fed onto the intermediate tray (58).

The paper refeed block includes a holder (not shown) and a paper refeed roller (3).
8), sorting rollers (39, 40), and a guide plate (not shown) are used to refeed the aligned copy sheets on the intermediate tray (58) one by one.

For reversal) scanning and composite copying, press the original and copy selection keys (303) on the operation panel (see Figure 1) in advance.
When one of the copy modes is selected by pressing (304), the switching lever (41) is switched to the solid line position in FIG. ) is guided by a guide plate (37) and conveyed to conveyance rollers (50) and (51).

The other switching lever (59) is rotatable about the shaft (85), and is set to the state shown by the solid line in FIG. 2 during reverse copying. The copy paper is guided by the top surface of the other switching lever (59), guided by the guide plates (86) and (87) of the transport block, and transferred to the transport roller (
52), (53), (54), and (55) to the left in FIG. 2, and a reversing conveyance roller (56).

(57) and a reversing guide (88), and is sent onto the intermediate tray (58) with the copied side facing up. Then, the position is aligned on the intermediate tray (58) by an alignment mechanism (see Japanese Patent Application No. 60-153117 for details).
The sheets are re-fed one by one by counterclockwise rotation of the re-feed roller (38).

On the other hand, during composite copying, the switching lever (59
) is set as indicated by the dashed dotted line in FIG. Immediately after the copy paper passes the conveyance rollers (50) and (51), it is guided by the lower surface of the lever (59) and directly transferred to the intermediate tray (58).
It is sent with the copied side facing down. Then, the sheets are aligned on the intermediate tray (58) by the alignment mechanism, and the sheets are re-fed one by one by the counterclockwise rotation of the re-feed roller (38), similarly to the case of reverse copying.

The re-fed copy paper is sorted by the sorting rollers (39) and (40), and then transferred to the conveying rollers (32), (33), and (34).
is conveyed to the timing roller pair (13) through the
Thereafter, double-sided copying or composite copying is performed in the same manner as in the normal copying process.

(c) Operation Panel Next, the arrangement of various operation keys on the operation panel (300) of the main body of the copying machine will be explained with reference to FIG.

The following keys are arranged on this operation panel (300). Print key (3) to start the copying operation
01), a numerical display device (302) capable of displaying two-digit numerical values
), "1", "2", ... "9", "0" respectively
” numeric keys (311) to (320) corresponding to the numerical values,
An interrupt key (307) for specifying interrupt copying, a clear/stop key (308), and a storage section (42).

Copy paper size selection key (309) for specifying the copy paper stored in (43) by size, up and down keys (306) for changing and specifying the copy image density in steps, (307) , a double-sided copy selection key (303), a composite copy selection key (304), and a binding margin soft key (310). In addition, indicator lights (303a), (3
04a) and (310a) each indicate that the corresponding key has been operated. Further, the copy paper size selection key (309) is a rotation key, and the copy paper size is sequentially changed each time the key is pressed. And the indicator light (30
9a), (309b).

(309c) and (309d) are respectively A3. B4.
This indicates that A4 and B5 have been selected.

(d) Control circuit for copying machine FIG. 4 shows a control circuit used in a copying machine according to the present invention. The first CPU 200 controls the optical system 1 .
A third controller that controls the PtJ201 and the editor 2000 described below.
The CPU is connected to the interrupt terminal INT and data input terminal SI.
N, controlled via 5OUT. Furthermore, 202 is a switch matrix, 205 is a decoder, and 206 is a driving device. Note that the output terminals AI to A7 are the main motor Ml, the developing motor M2, the timing roller clutch CLI, the top paper clutch CL2, the lower paper feed latch CL3, the charger 5, the transfer charger 7, the paper refeed clutch, and the discharge switch. It is connected to transistors (not shown) for driving and switching the solenoid, composite switching solenoid, re-feed roller upper and lower solenoids, and alignment solenoid. The first CPU 200 further includes an inter-image eraser 200.
LED array 1252 and liquid crystal display 210 are connected. Furthermore, stepping motors 211, 212, 213, and 1253 are connected to the drive circuit 206. A drive circuit 203 for a DC motor M3 for document scanning, a drive circuit 204 for a stepping motor M4 for zooming, and various switches 5W50 to 5W53 are connected to the second CPU 202.

(e) Data pass-through mechanism FIGS. 5 and 6 show in detail the portions related to data pass-through. Here, 200 is an inter-image eraser unit that performs inter-image erase or site erase according to the copying magnification;
210 is an optical path shutter that blocks image exposure from the optical system 1, and 1250 is an LED writing head.

FIG. 7 shows an LED writing device 1250. Here, 12
51 indicates an LED write head, and 1252 indicates an LED array. (In this embodiment, 40 LEDs are lined up in a row with an inon pitch as shown in FIG. 8.) Head 1
251 can be moved in the left-right direction along the drum surface by a stepping motor 1253 via a rope drive mechanism as shown. Also, on both sides of the drum l, there are sensors 125 for detecting the position of the head 1251.
4, +255 is placed, and the sensor is turned on by an interlabter attached under the head.

In this embodiment, the LED head 1251 is connected to the motor 12.
This is because LED heads are currently expensive. There is no need to use a motor if there is an LED array that covers the entire drum.

FIG. 9 shows a liquid crystal shutter 210. The liquid crystal is arranged in eight blocks of 40 mm each (210a~
210h) are independently controlled.

By turning on the driver with the signal from the 1st cPU (Fig. 4), the liquid crystal shutter 210 turns ON and the optical path changes to LED.
Light can be blocked in units of 40 mm corresponding to the length of the writing head 1251 (for example, the black part in FIG. 9).

Figure 10 shows the LED head 1250 and drum (photoreceptor)
The relationship with the latent image on l is shown. In the figure, an LED head 1250 is moved by a pulse motor 1253 to a data writing position specified by an editing area/data writing area designating device (hereinafter abbreviated as editor) 2000, which will be described later. IA is the original area, IB is the area outside the original that has been erased by the site erase (combined with the inter-image eraser 200), IC is the data writing area designated by the editor, and ID is whether the data is written vertically or horizontally. This is a designated area (this example shows the case where it is written vertically). Data is L of LED array 1252
Written using 7 LEDs with ED numbers 17 to 23, L
ED numbers 1-16°24-40 serve as erase. In this case, for example, the liquid crystal shutter 210 is shielded from light by 40 mm using a block 210b (see FIG. 9).

In addition, in the drum advancing direction, the lighting time and extinguishing time of each LED of the LED array 1252 are controlled to have a pitch of 1 mm depending on the rotational speed of the drum.

FIG. 11 shows each stage from the original to the completion of copying. Now, the document 240 with "F" written on it is placed on the document glass 16.
When the document is placed on the photosensitive drum 1 and copying starts, latent images 241 and 242 of the original and the forwarded data are formed on the photosensitive drum 1.
This latent image 2.11, 242 is copied onto copy paper 243. A latent image 242 is formed to the upper right of the latent image 241.

Figure 12 shows that the forwarding data is for the date December 31st (r1
2.31j (vertical writing)) is shown below. LED numbers 17 to 23 of LED array 1252
The seven light emitting diodes turn on and off in a preset order according to the rotation of the photoreceptor drum l. This r
In the case of the date data "12.3+", first all the light emitting diodes (numbers 7 to 23) are turned on, and when the photosensitive drum 1 rotates by the rotation angle (4a), all the light emitting diodes (numbers 17 to 23) are turned on. I turned off the light and imprinted the image,
Next, when the photoreceptor drum rotates by the rotation angle (2a),
When only the light-emitting diodes (numbers 21 and 22) are turned on and further rotated by the rotation angle (a), only the light-emitting diodes (numbers 18, 19, and 21.22) are turned on until they are rotated by the rotation angle (4a), and then rotated. Light up only the developed photodiodes (numbers 18 and 19) in corner (a) to imprint "2". Next, imprint “3” and “B” in the same way.

FIG. 13 shows an example of a dot matrix when the forwarding data is copy magnification data of rXo, 854J (horizontal writing), and 31 LEDs of the LED array 1252
(Nos. 5 to 35), the forwarding is performed in the same manner as the date data described above.

The date and magnification data are stored in the battery-backed clock IC 230 and the RAM 203, and displayed on the numerical display device 7 on the operation panel via the first CPU 201.
2 can be displayed.

Margin below (f) Editor Figure 14 shows the editing area/data writing area designation device (
2000 (hereinafter abbreviated as editor) is shown.

The editor 2000 has an editing/data writing area 2120
, an operation panel 211O, and a liquid crystal display 2100 for displaying data to be written.

FIG. 15 shows keys 2111 on the operation panel 2010.
~2128 and LED2111a~21 corresponding to each key
The arrangement with 28a is shown. Here, 2Ill is a key to start inputting the data writing position, and 2112 to 211
5 is a key that specifies the direction of write data, and 211f
3, 2117 are keys for specifying negative and positive write data, 2118 is a date write specification key,
2119 is the magnification write specification key, 2120.212
1 is a key to record user's arbitrary data, 21
22 is an arbitrary data manual start key, 2123 is an error manual clear key, 2124 is a key for "setting" after completing various data writing specifications, and 2125 is a key for specifying an area for image editing. The key to start, 21
Reference numerals 26 and 2127 are keys for specifying erasure and copy, respectively, and 2128 is a "set" key indicating that area specification for image editing has been completed.

FIG. 16 shows that the editing data writing area 2200 of the editor 2000 is set using keys 2001 to 2096 for specifying the area.
(most reference numbers have been omitted for clarity of illustration).

In this example, the area is ! It consists of 2 x 8 keys, and one key indicates an area of 40 mm x 40 mm. When editing an image, this l block can be specified as the minimum unit.

Also, when data is written, it is written into one block. The document matching corner 2200 moves according to the size of the document, making it easier to see the correspondence between the positions on the document and the positions of the keys.

It is easy to place the original on the panel and specify the copying position, as it makes it easier to understand the scanning results.

Figure 17 shows the area designation keys 200.1 to 2096 used to write arbitrary data manually.
shows the meaning of each key when it changes to an input key for alphabets, numbers, and symbols. The display of each key may be written thinly on the surface of the editor in advance, or a transparent film or the like with the above-mentioned alphabets written on it may be placed over the editor only when data is to be manually edited. Alternatively, the entire display may be a graphic liquid crystal, with a transparent sensor mounted on the surface, and the display contents of the liquid crystal may be switched between those shown in FIG. 16 and those shown in FIG. 17. Alternatively, there is also a method in which two display contents for one block are printed in advance on a sheet or the like, and only the selected display is illuminated with a backlight such as an LED. Alternatively, the display of each block may be rotated, and by switching the display, the mode may be changed as shown in FIGS. 16 and 17.

The table below shows what kind of information is communicated as write data from the third CPU to the first CPU in the example of FIG. 12. Data rN indicates that the LED is lit (the latent image is not developed because it is erased). Data “0” is LE
D indicates off. (It remains as a latent image and is developed.) Also, when negative/positive reversal is specified, the data "0" and r of the image valid LED (LED numbers 5 to 35 in the above example)
All you have to do is invert lJ. (Invalid LED (LED number 1
~4.36~40) are always lit for erasing. ) FIG. 18 shows the configuration of the third CPU that controls the editor 2000. Here, tCt~tct.

For example, an input/output expansion IC such as Intel's 8243
and various keys 2001-2096.2111-21
28, various displays 2111a to 2128a are connected. Further, ICII to IC12 are decoders. 21
00 is a liquid crystal display panel. 2150 is a clock IC, and 2151 is a RAM for storing arbitrary data, both of which are backed up by a battery or the like. or,
The third CPU performs data communication with the first CPU via a communication line.

(g) Double-sided copying and data forwarding Figure 19 shows the front side (first page) and back side (page 1) of a double-sided copy.
An example is shown in which the page number is imprinted on the second page). The page number is imprinted at the bottom right position. (The back-side copy is shown partially folded back.) FIG. 1 shows the orientation of the image with respect to the traveling direction of copying (indicated by an arrow) during double-sided copying. As you can see from the diagram, the writing positions on the front and back sides of a double-sided copy are different. Therefore, in this embodiment, if data is written at a distance of Ll from the leading edge of the page on the front side, the writing is automatically set at a distance of L2 (L2=W (paper width) - Ll) on the back side.

(h) Composite copying and data imprinting A composite copy can be made by copying twice on the same copy paper.

Now, as shown in FIG. 20(a), if the original marked rAJ is copied the first time and the original marked rBJ is copied the second time, an image in which rAJ and rBJ are combined is obtained. Now, as shown in FIG. 20(b), if data is written at the same position as data "l" twice, the writing position will shift due to the positional shift of the image leading edge registration or the skewed copy paper, and the written data will be may shift. Therefore, in this embodiment, as shown in FIG. 21, writing is performed only in one of the two copies of the composite copy. This eliminates any deviation in the written data.

(1) Binding margin creation and data wrapping In the binding margin copy mode, a binding margin of a specified width can be provided on the right side of the main copy. If there is no margin in the manuscript, providing a binding margin makes it easier to bind the copy paper.

Now, if we consider the case of imprinting data (in this case, the date) as shown in Figure 22 (a), if we set a binding margin as shown in Figure 22 (b), we will also have to change the imprint position. No.

(D Copying machine main body control flow Figure 23 shows a schematic flowchart of the first CPU 200 that controls the copying machine. When the first CPU 200 is reset and the program starts, the initialization of the first TCPU such as setting various registers, etc. Initial settings are made to put the device into the initial mode (step Sl).

Next, an internal timer built in the first cPtJ and whose value is set in advance as an initial setting is started (step S2).

Next, the subroutines (steps 63 to 514) shown in the flowchart are sequentially called. Here, the copying machine selection routine (step S3) is a routine for selecting the size of copy paper. The double-sided/composite selection routine (step S4) is a routine for executing double-sided copying/composite copying. The first copy preparation routine (step S5) is a routine for preparing to execute double-sided copying and composite copying. The first copying routine (step S6) is a routine for aligning the copy sheets (8U) fed onto the intermediate tray (58). The second copy preparation routine (step S7) is a routine for preparing for paper refeeding. Head control routine (
Step 5IO) is a routine for controlling the position of the LED head 1251. The LED array control routine (step 5ll) is a routine that controls lighting of the LED array I252. The liquid crystal shutter control routine (step 512)
This is a routine that controls opening and closing of 0. The inter-image eraser control routine (step 513) is a routine for controlling the inter-image eraser 200. The copy operation routine (step S8) is a routine for copying.

When all routine processing is completed, data communication with other CPUs is performed (step 514).

Then, after waiting for the end of the internal timer that was initially set (step 515), the l routine is ended. This l
The length of the routine is used to count the various timers that appear in the subroutine. (The end of each timer value is determined based on how many times this one routine has been counted.) FIG. 24 shows the copy paper selection routine (step S3). First, in step S3, it is determined whether or not a copying operation is in progress.
1) If copying is in progress, end this routine,
If copying is not in progress, press the copy paper size selection key (309
), and if the ON edge is confirmed, it is determined whether the first paper feed [storage section (42)] is selected (step 533). If the first paper feed is currently selected, the second paper feed [storage section (43)
)] and if the second paper source is not selected, the first
Select the paper source and input the copy paper size code of the second paper feed and the copy paper size code of the first paper feed to the 1st cPU (200
) (steps S34, 535).

By the way, the copy paper size code is preset,
In other words, the code for B5 vertical feed is rlJ, the code for A4 vertical feed is r2J, the code for B4 vertical feed is "3", and the code for A3 vertical feed is "3".
The code for vertical feed is "4".

Then, the length and width of the copy paper are stored in correspondence with the input copy paper size code (step 536).

For example, if the copy paper size code is "1", the length is stored as 257 mm and the width as 182 mm.

LEDs (309a) to (3) corresponding to the copy paper size set in the selected storage section (42) or (43)
09d) is turned on (step 537).

FIG. 25 shows the double-sided/composite selection routine (step S4).
) is shown. First, it is determined in step S4 whether or not a copying operation is in progress, and if the copying operation is in progress, this routine is ended. If the copying operation is not in progress, it is determined whether the LED (304a) is off, that is, whether composite copying is not selected (step 542). If composite copying is selected, the process immediately proceeds to step 846. If composite copy is not selected, then press the double-sided copy selection key (303
), and if the ON edge is confirmed, it is determined whether the LED (303a) is on (step 544). If it is on, LE
Turn off the LED (303a) (Step 545a), and if it is off, turn on the LED (303a) (Step 5
45b).

Further, in step (546), it is determined whether or not the LED (303a) is off, that is, whether double-sided copying is selected, and if double-sided copying is not selected, the ON edge of the composite copy selection key (304) is determined. Step 54
7) When the ON edge is confirmed, the LED (304a)
It is determined whether or not the LED (304a) is on (step S49), and if it is on, the LED (304a) is turned off (step S49).
a) If it is off (NO), turn on the LED (304a) (step 549b).

In this case, any selection key (303), (304)
If there is an ON edge, any L E D (30
3a).

(304a) is on/off [step (845a), (
S45b) and (S49a), (S49b)]
However, since the length of the laser is extremely small, the apparent top-lit state is maintained.

FIG. 26 shows the first copy preparation routine (step S5). Here, steps (S501) to (S519) are double-sided copy preparation, and steps (S520) to (S538)
is a routine for preparing composite copies. First, when the ON edge of the duplex copy selection key (303) is confirmed (step 5501), the duplex preparation flag is set to rlJ (step 5502), and the clutch of the lever (41) and the clutch of the paper refeed roller (38) are set. Turn on step 55
03), set the paper transport path to the intermediate tray (58) side, and position the paper refeed roller (38) at the upper stage. Note that the solenoid of the lever (59) remains in the off state, and at this time, the switching lever (59) switches the copy paper conveyance path to the conveyance block (11) side. At the same time, stepping motors (211), (212), (
213) to move each regulation plate (not shown) for copy paper alignment in a predetermined direction (step 5504).

Next, when it is confirmed that the duplex preparation flag is set to Nj (step 5505), the alignment regulation plate is moved according to the size of the copy paper, and the copy paper that has been copied on one side is moved. Preparations are made to place the receiver on the intermediate tray (58) (step 9506).

Next, each stepping motor (21+,), (212)
.

(213) is confirmed to be off (step 951B)
, reset the double-sided preparation flag to "0" (step 5)
519) End this subroutine.

On the other hand, if double-sided copying is not selected, step 8
It is determined No in 506, and the composite copy selection key (304) is pressed.
When the ON edge of is confirmed (step S520),
Step 5521: Set the synthesis preparation flag to rlJ.
), the clutches of the switching levers (41) and (59), and the clutch of the paper refeed roller (38) are turned on in step S52.
2) Switch the copy paper conveyance path to the intermediate tray (58) side and feed the copy paper directly onto the intermediate tray (58), and position the paper refeed roller (38) at the upper stage. At the same time, in step (S523), the stepping motors (211), (212), and (213) are turned on to move the alignment regulating plate (not shown) in the same manner as in step (S504).

Next, when it is confirmed that the composition preparation flag is set to "l" (step 5524), the alignment regulation plate (not shown) is moved according to the size of the copy paper, and copying is performed on one side. Preparations are made to receive the copy paper onto the intermediate tray (58) (step 5525).

Next, each stepping motor (211), (212).

(213) is confirmed to be off (step S537
), the synthesis preparation flag is reset to "0" (step 9538), and this subroutine is ended.

In the first copying routine (step S6), each copy paper is fed one by one onto the intermediate tray (58) during a copying operation, and the copy paper is preliminarily aligned.

FIG. 27 shows the second copy preparation routine (step S8). This subroutine is a control procedure for preparing for paper refeeding. In step S71, the second copy flag is set to “
1" is determined. The second copy flag is set to rlJ when one-sided copying is completed [see step (S134) described below], and this step S71
If the result is YES, the double-sided copy selection display r, ED (
Step 572)
, if double-sided copying is selected (YES), immediately turn on the paper refeed clutch (step 573), and move the paper refeed roller (38) to the aligned copy paper (58) on the intermediate tray (58).
81) Press it onto the top.

On the other hand, if composite copying is selected [step (S)
72), it is determined whether the combined movement flag is "0" (step 574). This composite movement flag is rOJ
At this time, this signal is used to instruct to move the copy paper (81) to the paper refeeding position during composite copying. If it is determined No in step (S74), it is determined whether the composite copy selection display LED (304a) is on or not (step 575). If it is on (YES), the composite movement flag is set to "l". and (step 576),
In step S77°978, the stepping motor (212
), (213) are rotated in the forward direction to move the copy paper in the paper refeeding direction.

Next, in step S79, after confirming that the composite movement flag is set to "1", the sensor (83) is turned ON.
Step 580), that is, copy paper (81
) has been moved to the paper refeeding position, the stepping motor (212).

(213) is turned off (step 581). Next, the paper refeed clutch is turned off (step 582), the paper refeed roller (38) is brought into pressure contact with the copy paper (81) that has been moved to the paper refeed position, and the composite movement flag is reset to "0". Step 583), this subroutine ends.

FIGS. 28(a) and 28(b) show the copy operation routine (step S8). First, step 5100. SIO
! It is determined whether the LEDs (303a) and (304a) are off or not, and if both are off (YES), that is, if neither double-sided copying nor composite copying is selected, the print key (301) is pressed in step 5102. When the ON edge of is confirmed, the copy start flag is set to rl in step 5103.
J, and the process moves to step 5I09.

On the other hand, if double-sided copying is selected, step 5100
It is determined No in step 5104, and it is determined whether the double-sided reference flag is "0" or not. If it is reset to "0", that is, the process is performed in step S after passing through the first copy preparation routine.
If it is reset to "0" in step 5!9, it is determined as YES, and the print key (301) is turned on in step 5IO6.
When the edge is confirmed, the copy start flag is set to rlJ in step 5IG7, and step 5108
The first copy flag is set to "l" in step 51.
Move to 09.

Also, if composite copying is selected, step 5too
YES in step 5lot, NO in step 5I05, it is determined whether the synthesis preparation flag is "0",
If it is reset to "0", that is, if it is reset to "0" in step 5538 after passing through the first copy preparation routine, the determination is YES. Subsequently, as described above, when the ON edge of the print key (301) is confirmed in step 8106, the copy start flag and the first copy flag are set to "1" in steps 5107 and 5108, and the process moves to step 5109.

In step 5109, it is determined whether or not the second copy flag is "l", and if it is "rl", the second copy flag is set to ” (step S111
) and sets the copy start flag to rlJ (step 5112).

Next, it is determined whether the copy start flag is rlJ or not (step 5113). If rN, the main motor is driven in step 5114 to rotate the photosensitive drum (2) and to rotate the copy paper conveyance roller, etc. becomes drivable. In addition, an exposure lamp (10) and a charger (6) are also provided.
), the transfer charger (5a) is turned on, the developing motor is turned on, and the copy start flag is reset to "0". Furthermore, a timer (A) that controls the paper feeding system
and a timer (B) that controls the optical system (1).

Next, in step 5115, it is determined whether the second copy flag is "0" or not. If double-sided copying or composite copying is selected and paper refeeding is possible, the second copy flag is set to rlJ. Therefore, the determination in step 5115 is No, and in step 5116 the paper refeeding roller clutch is turned on to refeed one sheet of copy paper from the intermediate tray (58), and the process moves to step 5121.

On the other hand, in the case of normal one-sided copying, step 5
115 is determined as YES, and then step S+17 determines whether the first paper feed section is selected or not, step 5119
It is determined whether the second paper feed section is selected in step 5118 or step 5I20, respectively, and the paper feed roller clutch of the selected paper feed section is turned on to feed one sheet of copy paper.
The process moves to step 5121.

Subsequently, when the end timing of the timer (A) is confirmed in step (S121), the first
．． Turn off the second paper feed roller clutch or refeed roller clutch. Furthermore, Step S! 23, the timer (B
) is confirmed, step 5124
Turn on the scan signal and scan the optical system (1) in the direction of arrow (b) in FIG.

Next, it is determined whether the timing signal is turned on or not (step S125), that is, the timing roller pair provided on the scanning trajectory of the optical system (1) is turned on and the copy paper is sent out from the timing roller pair (13). Determine whether the timing is right. If YES, step 5126
Turn on the timing roller clutch to feed the copy paper to the transfer section, and set the timer (C). When the end timing of the timer (C) is confirmed in step 5127, the timing roller clutch is turned off, the scan signal is turned off, and the exposure lamp (10) and charger (6) are turned off in step 5128. .

Next, in step 5129, it waits for the return signal to be turned on, that is, waits for the optical system (1) to start returning from the scanning end position to its home position, and then in step 5130, it checks whether the predetermined number of copies have been completed. Determine whether or not. If No in this step 5130, the copy start flag is set to rlJ again in step 5131, and if YES, it is determined in step 5I32 whether the first copy flag is "1" or not. The first copy flag is set to "1" when double-sided copying or composite copying is performed [see step 510B above], and if YES, the first copy flag is set to "1" in step 5133 to cancel double-sided copying or composite copying. The copy flag is reset to "0" and the second
Set the copy flag to "1".

If the continuous copying is completed [YES in step 5130] and the first copy flag is set to "I", the optical system (1) is activated in step 5t35 to end the copying operation.
After confirming that the developing motor has returned to the movement start position by turning on the normal position switch, in step S136, the developing motor,
Turn off the transfer charger (5a) and set the timer (D). Then, in step 5137, the timer (D)
When the end timing is confirmed, the main motor is turned off in step 8138, and the rotational drive of the photosensitive drum (2) is stopped. Next, in step 5139, the processing results up to that point are output, and the process returns to the main routine.

FIG. 29 shows the binding margin shift routine (step S9). For single-sided copying, when copying the front side of double-sided copying (step 5201), in order to create a binding margin at the leading edge of the copy,
Advance paper by a shift. Therefore, when the leading edge of the paper reaches the timing roller (step 5202),
The timing roller is rotated by the shift amount to advance the paper (step S203).

When copying the back side of a double-sided copy (step 5204),
Delays the start of the paper to create a binding margin at the end of the copy. That is, even if the timing signal becomes 1 (step 5205), the paper is not started immediately, but a delay timer for the shift is started (step 520).
6) At the end (step S207), the timing roller is rotated (step S208).

FIG. 30 shows the head control routine (step S
IO). When the power is turned on (step 52)
21'), the motor is rotated until the switch 1254 is turned on to return the LED head 1251 to its normal position (step S222). Next, the data write signal is set to 1.
(step S223), if the position (coordinates) to write the data is between 1 and 12 (see Figure 16),
The head position can remain as is, so the head movement is 0.
It is. When the number is 12 to 24, the writing position is a block between one column, so it is moved by 40 mm. Below, when you are between 25 and 36,
80 mm, etc., by the amount shown in the flowchart and shown in the table (step 5224).

FIG. 31 shows the LED array control routine (step 5ll). The optical system IO scanner is 5W53
When (image tip SW) is turned on (step 5241),
A timer Ml is started (step 5242).

This timer is a timer from the leading edge of the image to the area where data is written by the ED head 1250.
For example, if writing area "4" is specified, the distance to the writing start position is 40 mm x 3 ÷ scan speed (40+++ m
:L block length).

When timer M1 ends (step 5243), timer E is started (step 5244).

When this timer E ends, a timer interrupt is triggered.
The editor 2000 write routine begins. The value of timer E is the lighting time for each data of the three LEDs of the LED head. In this embodiment, one 1. E D 1
1] is set to 1 mm, the value of timer E is the time during which the LED lighting time reaches 1 mm on the drum, that is, 1 mm/drum speed. This results in one L of the LED array.
When ED lights up one unit, a square pattern of 1 mm x 1 mm is erased. Also, when the data end flag indicating that data writing is finished becomes 1 from the timer interrupt routine (Fig. 32) (step 5245).
, 40mm worth of data has been written, the flag is set to 0 (step 9246) and all LEDs are turned off (step 5247).

FIG. 32 shows an internal interrupt routine executed when internal timer E finishes timing. When timer E finishes counting, an internal interrupt is generated and the LED head 1252
Each of the LEDs numbered 1 to 40 is controlled by write data sent from the third CPU. That is, the light emitting diodes (numbers 1 to 40) of the LED array 1252 are caused to emit light according to the loop data (step 5281). If the wrap-around data at this time is not the final data (step S
282), set timer E step 5283
), if the loop data is the final data, the data end flag is set to "bi" (step 5284).

If the internal timer E is not set, this interrupt will not occur, so when the data end flag becomes "B", this interrupt processing ends.

FIG. 33 shows the liquid crystal shutter control routine (step SI2). The timer Ll is a timer for turning on the liquid crystal shutter 210 (closing the optical path) from the leading edge of the image to a prespecified data writing position, and the timer L2 is a timer for controlling the ON time of the liquid crystal timer.

When the data write signal is month (step 5261), if the coordinates to write data are 1-12 (step 5262)
, the liquid crystal 210a turns on (step 8266), 13~
24 (step S 272), 210b h(O
NL (step 5276), . . . If 85 to 96, 210h is turned ON. The timing to turn it on is after the image tip switch is turned on (step S263).
, when the timer L1 to the middle coordinate position ends (steps 5264 and 9265), it is turned on (step S266).

The specific timer value is determined by 40+++m÷scan speed
a, 210b, etc.). That is, if the coordinate is l, then W-
Since I=0, the image tip SW is ONL, and the liquid crystal 210 immediately turns on.
ah<turns on. Also, when it is turned on, timer L2 starts next (step S267), and the timer L2 starts for 40 mm (40 mm).
0mm÷scan speed) has passed (step 92).
68), turn off the liquid crystal 210a (step 926)
9). Below, other columns (columns 13 to 24, ..., 85
~96 columns) have the same idea.

FIG. 34 shows a control routine (step 513) for the inter-image eraser 200. When the scanner of optical system 10 turns on erase 5W52 (step 5291)
, the inter-image eraser 200 is turned off (step 5292).
, upon completion of scanning (step 5293), turns on (step 5294). In other words, it is OFF while there is a latent image on the drum.
do.

(k) Editor control flow FIG. 35(a) shows the third CI that controls the editor 2000.
'U' shows a schematic flowchart. When the 3rd CPU is set to 1 and the program starts, RAM 2
+ 3rd CPU for clearing 51, setting various registers, etc.
Initialization is performed and initial settings are made to put the device into the initial mode (step 5301).

Next, an internal timer built in the third CPU and whose value is set in advance as an initial setting is started (step S302). Next, subroutines ( Steps 8303 to 5309) are sequentially called.

When all subroutine processing is finished, wait for the end of the internal timer that was set first (step 5310).
, l ends the routine. The length of time of this l routine is used to count various timers that appear in the subroutine. (The various timer values determine the end of the timer based on how many times this l routine has been counted.) Also, data communication with the first CPU is performed by the first CPU.
An interrupt routine (Fig. 32(b)) is executed regardless of the main routine due to an interrupt request from the PU (step 5311).
This is done by

FIG. 36 shows the editing area specification routine (step 5303).
) is shown. With the ON edge of the area specification key 2125 (
Step 5331), if the LED 2125a is lit (
Step 9332), Turn off the LEDs 2125a to 2128a Step S333), LED 2125
If a is off (step 5332), the LED 212
5a is turned on (step 5334).

Next, when the LED 2125a is lit (step 5335)
That is, when in the mode for inputting the coordinates of the editing area, if any of SW2001 to SW2096 on the panel of the editor device is pressed (ON) (step 5336), the coordinates (data) are used as data for image editing. Store in address memory (step 5337).

Next, erase or copy select key 2126 or 212
7 is pressed (steps S341 and 343), the respective LEDs 2126a and 2127a are turned on (steps 5342 and 5344).

Also, when all input is completed, area set 5W2128
is turned ON, at that ON edge (step 5351
), and lights up the LED 2128a (step 5352
), data for image editing that has been set so far (“coordinates”)
, "Erase or copy") to the t-th CPU (step S353).

Figures 37(a) and (b) show the write area designation routine (
Step 5304) is shown. Data write specification key 21
At the ON edge of 11 (step 5371), LED21
If 11a is lit (step 5372), LED 21
Turn off lights 11a to 2124a Step S373)
, if it is off, turn on the LED 2111a (step 5
374). Next, when the LED 2111a is lit (step 5375), that is, when the data writing coordinates are input mode, the 5W 200 on the panel of the editor device 2000
When any one of 1 to 2096 is pressed (ON) (step 5376), the coordinates (data) are stored in the address memory as data for data writing (step 5
377).

Next, a key 211 for specifying the data writing direction (up, down, left, right)
2 to 2115 are pressed (step 5381-S3
84), each of the LEDs 2121a to 2115a is turned on (steps 8385 to 8386).

Next, when the negative/positive designation keys 2116 and 2117 are pressed (steps 9391' and 5392), the respective LEDs 2116a and 2117a are turned on (step 5
393,5394).

Next, write data content selection keys 2118 to 212
1 is pressed (steps 8401 to 5402), the respective LEDs 2118a to 2121a are turned on (steps 5405 to 5408), and in the case of key 2118, the clock IC 2 backed up by the battery is turned on.
Load date data from 150 (Step 5409)
, keys 2120 and 2121, preset arbitrary data is loaded from the battery-backed memory 2151 (step S).
410. s411), the contents are displayed on the liquid crystal display 21
00 (step 5412).

Next, complete all input and write data set S.
When W2124 is turned on, at the ON edge (step 5421), the LED 2124a is turned on (step 5).
422), data for data writing set so far (
“Writing position coordinates,” “writing direction,” “negative/positive,” “writing data,” etc.) are sent to the first CPU (step 5
423).

FIG. 38 shows the write data memory routine (step 530).
5) is shown. When the arbitrary data input key 2022 turns ON (step 5441), the LED 2122a is turned on (step 5442). When the LED 2122a is lit (step 5443), that is, in the mode of manually inputting characters (data) of arbitrary data, if any of the 5Ws 2001 to 2096 on the panel of the editor device is pressed (ON) (step 5444), The input is changed to a character panel designation as shown in FIG. 18 and sequentially displayed on the liquid crystal display 2100 (step S4.45).

Next, when the keys 2100 and 2121 are pressed (steps 5451 and 5452), the LED 2122a is turned off (steps 5453 and 5455), and the data displayed on the liquid crystal display is stored in the memories M1 and M2 in the memory 215I, respectively. (Steps 5456, 5457
). Since the memory 2151 is backed up by a battery, the data will be stored without being erased from now on.

FIG. 39 shows the double-sided writing position automatic conversion routine (step 5306). With data write signal = 1 (step 5
471), when copying the back side of the double-sided copy (step 5472) (step 5473), and when the page writing mode is selected (step 5474), convert the data (page) writing position to a position symmetrical to the front side. (Step 5475). For example, as shown in FIG. 40, if the page writing position on the front side of an A4 sheet is designated as "90" in the writing position number menu, the page writing position on the back side is automatically converted to the symmetrical position "85" with respect to the copy center.

FIG. 41 shows the binding margin appropriate writing position automatic conversion routine (step 5307). When the data write signal is rlJ (step 8481) and the binding shift mode is set (step 3
482), the data writing position is softened only for the designated binding portion (step 5483).

Specifically, the LED array control routine (third
The timer Ml in Figure 1) is shortened by the amount of the binding margin shift (shift amount ÷ scan speed).

FIG. 42 shows the composite writing position automatic conversion routine (step 5308). In the composite copy (step 54
91), for the first copy (step 5492),
If data writing is specified, the data writing signal is set to O (step 5493) to indicate that data writing will not be performed.

Margin below (effect of the invention) When data such as the number of pages is imprinted on a double-sided copy C,
The data writing position on the image must be changed between the front and back sides. By automatically switching the writing position, that effort can be saved.

Furthermore, by controlling the position so that both the front and back sides are in the same position (by making the distance from the corner the same), it is possible to make the completed double-sided copy more balanced.

[Brief explanation of the drawing]

FIG. 1 is a diagram of double-sided copying. FIG. 2 is a sectional view showing the configuration of the copying machine. FIG. 3 is a diagram of the operation panel of the copying machine. FIG. 4 is a circuit diagram showing input/output to a CPU that controls the copying machine. FIG. 5 and FIG. 6 are diagrams showing the arrangement of parts related to data looping, respectively. FIG. 7 is a perspective view of the LED writing device. FIG. 8 is a diagram of the LED array. Figure 9 is a diagram of the liquid crystal display. FIG. 10 is a diagram showing the relationship between the LED head and the latent image on the photosensitive drum. FIG. 1I is a diagram showing the steps up to imprinting data on a document. FIGS. 12 and 13 are diagrams showing examples of imprint data. FIG. 14 is a perspective view of the editor. FIG. 15 is a diagram of the editor operation panel. FIG. 16 is a diagram showing the arrangement of area designation keys on the editor. FIG. 17 is a diagram showing the arrangement of keys for data input. FIG. 18 is a circuit diagram showing the human output of the CPU 3 that controls the editor. FIG. 19 is a diagram of the front and back sides of a double-sided copy. FIGS. 20(a), 21(b) and 21 are diagrams of composite copies. FIGS. 22(a) and 22(b) are diagrams showing the binding margin software. Figure 23, Figure 24, Figure 25, Figure 26, Figure 27,
28(a), (b), FIG. 29, FIG. 30, FIG. 31, FIG. 32, FIG. 33, and FIG. 34 are flowcharts of copying machine control, respectively. Figure 35 (a), (b), Figure 36, Figure 37 (a)
, (b), FIGS. 38 and 39 are flowcharts of editor control, respectively. FIG. 40 is a diagram showing changes in the data imprinting position. FIG. 41 and FIG. 42 are flowcharts of editor control, respectively. ■... Photosensitive drum, 200... Inter-image eraser, 210... Liquid crystal shutter, 1250... LED writing head, 2000... Editor, 2001 to 2096... Keys 2110... Operation panel . Patent Applicant Minolta Camera Co., Ltd. Representative Patent Attorney Patent Attorney Said Ao and 2 others Fig. 2 Fig. 7 Fig. 8 Fig. 97 1 Snow 0 Fig. 12 Fig. 11 $161!21 Fig. 170 Fig. 20 ( a) (b) 112th Co. Figure 23 Purchase Figure 25 'M26 Punishment 1128F2 (a) 29th Flash Den 3o side @ Figure 31
Ken 32r No. 331! /1 Drawing 34 a35rJ (0) Gate 37 (0) Procedural amendment (voluntary) Commissioner of the Patent Office December 1988 IO date 1 Indication of case 2, name of invention Electrophotocopy machine 3 Person making the amendment Relationship to the incident Patent applicant name (607) Minolta Camera Co., Ltd. 4.
Agent Address: 2-1-61 Mihigashi District, Osaka City, Osaka Prefecture 540
No. 7, Contents of amendment A, the following parts of the description will be corrected. In the Detailed Description of the Invention column, -) Page 7, line 14, the words "in the upper row" will be corrected to "in the upper and lower rows." (2) Delete the following line 15th line of page 7: "and the lower cassette-type storage compartment." ) On page 10, line 20, page 11, line 9, and page 12, line 7, the words ``reversal'' will be corrected to ``double-sided.'' (4) Page 14, 1st line, 14th line, r200j should be corrected to r2201. '-) On page 15, line 9, correct the word ``head'' to read ``device.'' ) Page 15, lines 11 to 14 r1251 is... 1251 is '', rLED
The head 1251 has an LED array 1252 (in this embodiment, 40 LEDs arranged at a pitch of 1 mm as shown in FIG. 8).
or standing in a line. ) and interlabitor 1256
” and amend it. (7) On page 15, line 20, "Interlabter" should be corrected to "Interlabter 1256." (8) Delete "Write" on page 16, line 12. (9) Page 16, line 15, line 17 rl 250J
I will correct it to r125N. (10) On page 17, line 14, insert “data writing” between “by” and rlmmJ. (11) On page 18, line 6, after "indicates.", insert "here, a indicates the writing pitch (rotation angle)". (I2) Delete "Date...can be done." on page 19, line 7 to line io. (13) Insert the following table after page 22, line 20. Below, in the margin (14), page 25, lines 14 to 15 and lines 15 to 16, the words r200J will be corrected to r220j. (I5) Page 27, line 20, determine “ON edge” and [, and between j, “(i.e.
signal rise from low level (0) to high level (1))
”. (16) Shows the opening of the 1st Oth row of page 52. Insert the following sentence after ``. [In this embodiment, data was written the second time, but the data may be written the first time and not written the second time. Further, in a composite copy in which composition is performed three or more times, it is only necessary to write data for one of the image forming processes. ” Figures 4, 7, and 10 of the B8 drawing will be corrected as shown in the attached sheet. No. 714

Claims (1)

[Claims] (1) A copying means for copying by electrophotography, and a double-sided copy paper on which copies have been made on the front side by the copying means, which is then reversed and conveyed again to the copying means, and copies are made on the back side of the copy paper. a copying control means; a data imprinting means for imprinting data onto a photoconductor when copying by the duplicating means; 1. An electrophotographic copying machine comprising: data imprinting control means for automatically setting a predetermined position different from a predetermined position and causing the data imprinting means to imprint data.