JPH01223480A - Device for imprinting index mark of electrophotographic copying machine - Google Patents

Abstract

PURPOSE:To effectively use an index mark by adjusting at least either the number of the variation steps of an index mark imprinted position or mark size in response to the size of a copying sheet. CONSTITUTION:An original scale 41 is provided on the side part of an original placing glass 10 on the upper surface of a machine body 1. A linear index mark 42 is provided along the scale 41, and a mark 42 is exposed through a slit on a photosensitive body drum 2 together with the image of an inverse image placed on the glass 10. Copying operation is controlled by a microcomputer and the latent image of the mark 42 on the drum 2 is erased at every position by an eraser 32. When an index mark imprinting mode is selected, an erased position or an imprinted position is updated in the way that at least either the number of the variation steps of an index mark imprinted position or the size of the index mark is adjusted. Then the index mark can be effectively used.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an index mark imprinting device for an electrophotographic copying machine, which forms index marks around the sheet as an image is formed on the sheet. Keep it
It is used for displaying things like indexes.

(Prior Art) Conventionally, when a copy is filed and an index is provided, an index piece that projects outward is attached to the edge of the required page of the filed copy.

(Problems to be Solved by the Invention) In the conventional method, the index pieces have to be pasted on, which makes the work complicated.

Moreover, since the attached index piece protrudes from the filed copy, it is susceptible to external effects such as snagging. For this reason, if the index piece is weaker than the copy, it will damage itself, and if it is stronger, attaching the index piece to the copy will likely damage the border. It's hard to bear.

Therefore, the applicant first developed an index mark imprinting device that provided an index mark on one side of the document placement section and automatically changed its position and imprinted it on one side of the copy sheet as the original image was copied. proposed. However, the size of the sheet used for copying is not constant, so if you try to use the entire area of one side of the maximum size sheet as the position update range for index mark imprinting, the size of the sheet used for copying is not constant. The position change range will be exceeded, and the mark will not be visible. To solve this problem, if you set the shift range of the imprint position to match the smallest size copy sheet, you can imprint marks using the entire range on one side of the larger size copy sheet. It is inconvenient that it cannot be done.

The present invention provides an index mark for an electrophotographic copying machine that can solve the above-mentioned problems by adjusting at least one of the number of stages of change in the imprint position of the index mark and the mark size according to the size of the copy sheet. The object of the present invention is to provide an imprinting device.

(Means for Solving the Problems) In order to achieve the above-mentioned objects, the present invention provides an index mark provided on one side of a document placement section, a means for selecting a mode for copying the index mark, and an index mark provided on one side of a document placement section; means capable of erasing the latent image of the index mark formed in the copying process at least by position; means for automatically updating the imprinted position of the index mark using an update signal; and means for detecting the size of the copy sheet; The erasing means is controlled so that when the index mark imprinting mode is not selected, all the latent images of the index mark are erased, and when the index mark imprinting mode is selected, the erase means is erased at positions other than the set position. When the first control means and the index mark imprinting mode are selected, at least one of the number of stages of change in the imprinting position of the index mark and the size of the index mark is adjusted according to the copy sheet size detection signal. The present invention is characterized in that it includes a second control means for controlling the erasing means or the photographing position updating means so as to perform the following operations.

(Function) The index mark is provided at a necessary position on one side of the document placement section, and is projected onto the photoreceptor together with the image of the document on the document placement section, so that it can be transferred to a copy sheet as a copy image.

The latent image of the index mark formed by the projection on the photoreceptor can be erased at least positionally by an eraser, or the image can be prevented from being formed from the beginning.

Here, the first control means controls the erasing means in response to a position setting signal from the index mark imprinting position updating means and a signal indicating whether the index mark imprinting mode is selected or not from the mode selection means. do.

This control erases all index marks formed on the photoconductor when the index mark imprinting mode is not selected, so unnecessary or inconvenient index marks may be removed from the document depending on the non-selection. It is possible to prevent the image from being copied together with the image.

In addition, when the index mark imprint mode is selected, the control is such that only the latent image of the index mark formed on the photoreceptor that corresponds to the set position is left, and the others are erased. Therefore, only appropriate index marks corresponding to each automatically updated position setting can be copied together with the original image.

On the other hand, during copying, a means for detecting the copy size operates and inputs the detected size signal to the second control means. Thereby, the second control means controls the index mark imprinting position updating means or erasing means in accordance with the size signal, and at least the number of change steps of the imprinting position that determines the imprinting range of the index mark and the mark size. Since one side is adjusted, no matter what size the copy sheet is, index marks can be reliably imprinted using just the right range.

(Embodiment) An embodiment in which the present invention is applied to a centering type electrophotographic copying machine as shown in FIGS. 1 and 3 will be described.

This electrophotographic copying machine is provided with a photosensitive drum 2 that is driven counterclockwise at approximately the center of a machine body 1. As shown in FIG.

Around the photoconductor drum 2 is the main eraser lamp 3.
, a main charger 4, a developing device 5, a transfer charger 6, a separation charger 8 for a copy sheet 7, a cleaning device 9, etc. are arranged in order in a counterclockwise direction.

The photoreceptor drum 2 has a photoreceptor layer provided on its surface, and this photoreceptor layer is charged by passing through the main eraser lamp 3 and the main charger 4, and is charged by passing through the main eraser lamp 3 and the main charger 4, and the photoreceptor layer is charged by passing through the main eraser lamp 3 and the main charger 4. The image is exposed by an exposure optical system 11 provided below. The exposure optical system 11 includes a light source 12, movable mirrors 13, 14, 15, a projection lens 16, and a mirror 17. The light source 12 and the movable mirror 13 operate at a constant speed (V8) of the photosensitive drum 2 (constant regardless of magnification or variable magnification) (where n: copying magnification).
The movable mirror 14.15 moves to the left at a speed of (V/
DC motor M1 moves to the left at a speed of 2n).
is driven to scan the original image on the original placing glass 10 and expose the photosensitive drum 2 to slit light. When changing the copying magnification, the stepping motor i2 moves the projection lens 16 on the optical axis and the mirror 1
7 is accompanied by movement or swinging motion.

Paper feed sections 20.21 each having paper feed rollers 18.19 are installed on the lower side of the machine body l, and transfer the copy sheet 7 between the photosensitive drum 2 and the transfer/separation chargers 6.8. The paper is fed to the Paper feed section 20.21
A manual paper feeding section 22 is also provided at the upper part of the paper. Further, a pair of registration rollers 23 for taking registration timing is provided immediately before the transfer section. On the other hand, behind the transfer section, there is a conveyor belt 24 that receives the toner image transferred from the photoreceptor drum 2 and conveys the separated copy sheet 7, a fixing device 25,
A pair of ejection rollers 30 is provided, and after the copy sheet 7 after transfer is fixed by a fixing device 25, it is ejected to a paper ejection tray 31 outside the machine 1 via the ejection roller pair 30. There is also a paper feed section 33 in the base 29.
34 are provided and can be used selectively.

Furthermore, the exposure section around the photoreceptor drum 2 and the developing device 5
An inter-image eraser unit 32 is provided at a position between. When this inter-image eraser unit 32 is operated, it removes the charge received by the charging member 4 on the photoreceptor drum 2, and erases the electrostatic latent image in the removed portion so that no development is performed. do. This is commonly used to prevent image formation between images formed on the photoreceptor drum 2.

This inter-image eraser unit 32, as shown in FIG.
A large number of light emitting diodes (hereinafter referred to as LEDs) 32a are arranged in the axial direction of the photoconductor drum 2, and the light on the photoconductor drum 2 is controlled by the operation timing and which of the LEDs 32a is emitted during operation. It is possible to erase an image in any part of the normal image area where an electrostatic latent image is formed and developed, and in the present invention, it is also used to erase unnecessary index marks as will be made clear below. .

As an example, the index mark is placed on the document placement glass 10 on the top surface of the machine body 1, and a document scale 41 is provided on one side of the document placement glass 10, as shown in FIG. This manuscript scale 41 has a scale that matches the center alignment method of the aircraft l, and is
A circumferential scale graduation 41a is provided which primarily uses series.

A linear index mark 42 along a document scale 41 is provided on the document placement glass 10, and a slit is placed on the photoreceptor drum 2 by the exposure optical system 11 together with the image of the document placed on the document placement glass 10. exposed to light.

An operation panel 51 as shown in FIG. 4 is provided at the upper front of the aircraft body 1. As shown in FIG. The operation panel 51 has a print key 52, and next to the print key 52 there is a numeric keypad group 53 with keys 53° to 539 for setting the number of copies and index mark position numbers. A clear/stop key 54 and an interrupt button are used to clear the number of copies to be made or to interrupt the copying operation in the middle.

An interrupt key 55 for reading and copying is provided.

A display section 56 for displaying the number of copies, index mark position number, etc. is provided above the print key 52. Next to the 0 display section 56 are copy density adjustment keys 57 and 58 and a copy density display section 59. When the key 57 is operated, the copy density becomes darker, and when the key 58 is operated, the copy density becomes lighter.

Next to the numeric keypad group 53 is a mode selection key 67 for selecting a mode for photographing the index mark 42 or not.
and a selection key 68 for selecting a mode for automatically updating the display portion 67a and the index mark printing position.
and a display section 68a thereof are respectively provided.

When the index mark photography selection key 67 is operated, the mode is switched from the normal mode to the index mark photography mode, and when it is operated again, the mode returns to the normal mode. Then, by operating the numeric keypad 53 in the index mark photo viewing mode, the position number of the index mark can be set, and the position number can be set on the display section 56.
to be displayed.

Furthermore, when the mode selection key 68 for automatically updating the index mark position is operated, the mode switches from the normal mode to the automatic position update mode, and the timing for updating the mark position can be set. - It returns to normal mode when operated once.

The operations of the copying machine described above are controlled by a microcomputer (hereinafter referred to as microcomputer) 81 shown in FIG. 5, to which the various operating means, operation section, display section, etc. are connected. In particular, the inter-image eraser unit 32
D 32a are arranged in 60 pieces at 5I111 pitch, so that the entire width of the photosensitive drum 2 can be erased, and it is controlled via the eraser control circuit 82 shown in FIGS. 5 and 6.
The LED 32a has the maximum size ^3 l, 2.3,... from one end of the short side of the copy sheet 7 to the other end.
The data for turning it on and off is given as serial data from the microcomputer 81 along with a clock signal.

Here, the index mark 42 is an index mark 4 of a predetermined length on one side of the copy sheet 7 as shown in FIG.
2a, so that when the copy sheets 7 are bundled, an image 42a' is formed on the outer peripheral end surface thereof, and serves as an index display to the outside.

The length of this index mark 42a is the length of the LEo32.
By turning off only the LEo 32a corresponding to the index mark at the set position and turning on the other LEo 32a, only the index mark at the set position can be copied. enable.

LEo when the index mark 42a does not need to be imprinted.
By lighting up all the index marks 32a, all the index marks on the photosensitive drum 2 are erased and cannot be copied.

To control this with the microcomputer 81, set index mark positions 1 to 20 to each LED + to h0 in the table below.
Allocate it as shown below and store it in RAM, and then select the corresponding LED according to the index mark position setting.
The number of 32a is specified from the contents of RAM and controlled.

M3, developing motor M4, clutch CLt of registration roller pair 23, clutch Ct of upper paper feed roller 18, Z,
A clutch CL3 for the lower paper feed roller 19, a sheet position detection sensor 91 just before the registration roller pair 23, and a fixed position detection switch 9 for the first mirror 13 as a scanner.
2. An image leading edge position detection switch 93 and the like are also connected.

On the top surface of the machine body 1, there is a document placement glass 1 as shown in Fig. 1.
An automatic document feeder 100 is installed which covers the top of the document feeder 100. This device 210G can set a large number of originals 102 on the original tray 101, and the originals 102 on the tray 101 are sequentially separated one by one from the bottom by a bottom feed roller 103 and a pair of separating rollers 104. sending out,
The document is fed through a U-turn path 105 between the document placement glass 10 and a conveyance belt 106 provided in sliding contact thereon. The TE transport belt 106 transports the original to a predetermined copying position on the original placing glass 10, stops once, and copies the document a necessary number of times. In this case, since the number of copies of each document is partially stacked on the paper discharge tray 31, so-called grouping is performed although sorting is necessary. Conveyor belt 1 after copying
06 is driven again to place the original 10 on the original placing glass 10.
2 to document tray 1 through one U-turn bus 107.
01 and remains in the document tray 101
0M, which returns above 02, is the drive motor of the device 100.

When all originals 102 initially set on the original tray 101 have been copied as described above, the original tray 101
The original 102 is returned onto the original 01 as originally set, and can be fed again and used for copying.

If you repeat feeding the originals set in this way one by one and copying them one by one as many times as necessary, the copies of each original will be sequentially ejected onto the paper output tray 31 and overlapped in that order. , the number of copies overlaps with the same page alignment as the original.Therefore, although they are not sorted into parts, they are sorted.

In this way, it would be convenient to automatically print index marks while changing their positions as necessary to automatically obtain a large number of copies of a large number of original documents using the automatic document feeder 100. Note that the automatic document feeder 100 includes:
A sensor 109 is provided for detecting a so-called break in the document after all of the documents 102 set therein have been fed.

As shown in FIG. 7, this sensor 109 includes a lever 110 that can rotate around an axis 10B and has a heavy tip 110a and has downward rotational sliding properties, and a photosensor 111 that detects the movement of this lever 110. It consists of a combination of When the device 100 is used, this lever 110 automatically places its tip 110a on the original 102 on the original tray 101, and when all of the originals 102 are fed, the receiver stops and rotates downward when there are no originals left. do. The photo sensor 111 detects the state change at this time and inputs it to the microcomputer 81. This input signal serves as a detection signal for a break in the original 102 when the original 102 is repeatedly copied. However, as shown in FIG. 8, the condition is that the document detection sensor 112 provided under the bottom of the document tray 101 detects the document.

Note that the originals 102 on the original tray 101 on which the tip 110a of the lever 110 of the sensor 109 is placed are sequentially fed from the lower part, and after being used for copying, are returned to the original tray 101 and placed on the lever 110. tip 110a of
Although it is placed on top of the document, it does not interfere with the operation of detecting the cut edge of the document. Then, when all the originals 102 after copying are returned to the original tray 101, if the next copy is to be performed, the tip 110a of the lever 110 is automatically placed on the original on the original tray 101 again. It is designed to be posted on the website.・ By the way, it is desirable that the position of the index mark changes more frequently as the number of copies and sheets increases.However, if the size of the index mark and the number of changes in the imprint position are specified, If the number of columns is set according to the size of the copy sheet, there is a problem that the number of columns will be exceeded for the small size copy sheet and the image will not be printed during actual copying. If the number of columns is set at the same time, in the case of a large-sized copy sheet, the space of the same size cannot be fully utilized.

In order to deal with these inconveniences, in this embodiment, the number of stages for changing the imprinting position of the index mark is set according to the size of the copy sheet, and the index mark is always printed in the number of stages that utilizes the space of the same size as the copy sheet. to be able to take pictures. Note that instead of setting the index mark position change stages according to the size of the copy sheet, it is also possible to change the index mark size so that the imprint space matches the copy sheet size even with the same number of position change stages. can. Furthermore, if necessary, both the size of the mark and the number of columns can be set according to the size of the copy sheet.

In order to make settings according to the size of the copy sheet, a copy sheet size detection signal from a size detection switch 122 provided in each paper feed section 20, 21, 33, 34 as shown in FIG. 1 is used. Ru.

As shown in FIG.
A combination of switches 122a+, 122az, 122a, which face the size signal uneven portion 125 provided in , and switches 122bl, 122b! , 122
It is a combination of ba. A description of the paper feed units 33 and 34 will be omitted.

A table of combinations in which these switches 122 are turned on and off by the size signal uneven portion 125 and the size of the copy sheet expressed using the combinations is assigned as shown in Table 2 below.

Table 2 (T indicates vertical sheet running, Y indicates horizontal sheet running) and the maximum number of rows that can be set for the imprint position of the index mark and the maximum mark value indicating the maximum row for imprinting on one end of the copy sheet. Assuming that the minimum mark value indicating the end-side imprint limit stage is 1 to 20, the width of the number of stages suitable for each sheet size can be set as shown in Table 2. If the Naori set is not installed or if there is no compatible sheet size, the sheet size is the maximum ^4Y
, so that it is the same as in the case of A3 size.

These switches 122a= , 122az , 122a
, , 122bl , 122bt , 122b! and a sensor 109 provided in the device 100 described above.
112, the motor h is also connected to the microcomputer 81.

-Next, the index mark imprint control will be mainly explained based on the flowcharts shown in FIG. 11 and subsequent figures.

First, in the main flow of copying operation control shown in FIG. 12, in step #1, the initial operation after the microcomputer 81 is reset is performed, and in step #2, the first operation of the microcomputer control is performed.
Activate the internal timer that defines the routine. Next, in step #3, it is determined whether or not copying is in progress. If copying is in progress, the process advances to step #7; if copying is not in progress, the process advances to step #4. In step #4, it is determined whether or not the index mark imprinting mode is selected, and the mode is set accordingly. In the next step #5, it is determined whether the index mark imprinting position is in the automatic J new mode in the index mark imprinting mode, and the mode is set accordingly.

After this, in step #6, the size of the copy sheet is detected and the mark maximum and minimum values that define the number of rows of index mark imprinting are set in accordance with the settings in step #5, and further in step #7, the mark maximum and minimum values are set. Make other settings such as the number of copies. In step #8, the eraser unit 32 is controlled. In step #9, control is performed to automatically update the index mark imprinting position in accordance with the mode setting in step #5 and the setting of the maximum and minimum mark values depending on the copy sheet size. In step #10, other controls such as the scanning system and around the photosensitive drum 2 are performed, and in the next step #11, a routine timer is checked, and when the timer exceeds, the process returns to step #2.

The subroutine of copy mode setting 1 in step #4 in the main routine of FIG. 11 will be explained based on the flowchart of FIG. 12.

In steps #100 to #100d, state SC1 is checked, and steps #101 and #11 are performed according to the result.
1, #121, #131, #141, #15
1.

When state SC1 is 0, proceed to step #101;
It is checked whether the selection key 67 for index mark imprinting is on or not. If it is off, the process returns. If it is on, it is further determined in step #102 whether the mode selection key 68 for sorting in index mark imprinting is turned off. If it is on, return without setting the mode, and if off, set state SC2 to 0.0 Next, proceed to steps #104 to #108, save the contents currently displayed on the display section 56 to the stack area, and set the index mark position number. The contents of R711 are displayed on the display unit 56. Then, a flag F1 indicating that the index mark imprinting mode has been selected is set, the display section 67a is turned on to indicate to the operator that the index mark imprinting mode has been selected, the state SCI is incremented, and the process returns.

When the state SCI is 1, the process proceeds to step #111, and checks whether the selection key 67 is on or not. If it is off, the process proceeds to step #116, sets the state SCI to 3, and returns. If it is on, proceed to step #112 and check whether any of the numeric keys 53 is turned on. If it is off, return as is, and if it is turned on, proceed to step #113.
Proceeding to ~#115, the contents of the display section 56 are all erased once, and the contents of the manually pressed keys are displayed in the 1's digit. Then, the state SC1 is incremented and the process returns.

When state SC1 is 2, proceed to step #121,
Check whether the selection key 67 is on or not. If it is on, proceed to step #122, but if it is off, proceed to step #125.
The process advances to , increments state SC1, and returns. In step #122, it is checked whether any of the numeric keys 0 to 9 is turned on, and if it is turned off, the process returns, and if it is turned on, it proceeds to steps #123 to #125.
The displayed contents of the l digit are moved to the 10's digit, and the inputted contents of the numeric keypad 53 are displayed in the 1's digit. and state SC
Increment I.

When the state SCI is 3, proceed to step #131,
Check whether the selection key 67 is off or not, and if it is on, return directly, and if it is off, proceed to step #132, and if the numerical value input by the numeric keypad 53 (at this time stored in the 7-segment display RAM) is greater than 20. If it is large, set 20 in the index mark position number RAM, and if it is small, just set the value in the index mark position number RAM. And step #1
35, in #136, the contents of the 7-segment display RAM before the selection key 67 was turned on are restored from the stack area, and the state SCI is incremented.

STEP) When SCI is 4, proceed to step #141,
Check whether the selection key 67 is on or not. If it is off, return directly, and if it is on, proceed to steps #142 to #144.
Then, the flag Fl is set to "0", the display section 67a is turned off, and the state SCI is incremented.

When the state SCI is 5, it is checked whether the selection key 67 is off or not, and if it is on, the process returns as is, and if it is off, the state SCI is set to O and the process returns.

In the above steps, the index mark imprinting mode is selected or canceled, and the index mark position number is accordingly set, displayed, or canceled.

Further, the subroutine for copy mode setting 2 at step #5 in the main routine of FIG. 11 will be explained based on FIG. 13.

Steps #300 to #300b) Check SC2 and step #301 and #3 according to the result.
11, #321, or #331.

When the state SC2 is O, the process proceeds to step #301, and it is determined whether the selection key 68 for the automatic update mode of the index mark imprinting position is on. If it is off, return as is, and if it is on, proceed to step #302. Here, it is further determined whether the mode selection key 67 for index mark imprinting is off, and if it is on, the process returns, and if it is off, go to step #303 to #307 to enter state SC1.
is set to O, and the minimum mark value is set in RAH of the index mark position number so that mark imprinting is performed from the position of the minimum mark value, and the flag F1 indicating the automatic mark position update mode is set to "1". At the same time, after turning on the display section 68a for selecting the automatic update mode of the photographing position, the state SC2 is incremented.

If the state SC2 is 1, the process advances to step #311 and it is determined whether the selection key 68 is off. If it is on, return as is, and if it is off, go to step #312 to state SC
Increment 2 and return.

If the state SC2 is 2, the process advances to step #321 and it is determined whether the selection key 68 is on. If it is off, return as is, and if it is on, from step #322 #
At step 324, the flag Pi is set to "0" and the display section 68a of the automatic photographing position update mode is turned off.
Increment SC2 and return.

ST) When SC2 is 3, the process advances to step #331 and it is determined whether the selection key 68 has been turned off.

If it is on, the process returns as is, and if it is off, the state SC2 is set to O in step #332 and the process returns.

Also, to explain the copy size detection subroutine in step #6 in the main flow of FIG. 11, the state of the detection switch 122 related to the cassette selected during use in step #600 shown in FIG. 14 and the correspondence table shown in the display. Set the maximum and minimum mark values for the index mark imprinting position according to the following.

As described above, mode selection and cancellation of the automatic updating of the imprint position in the index mark imprinting mode, lighting and extinguishing of the display section 68a accordingly, setting of the number of change steps of the mark imprinting position according to the size of the copy sheet, and the like. A process called cancellation is performed.

Next, the eraser control subroutine in the main flow of FIG. 11 will be explained based on FIG. 15.

First, in steps #200 to #200d, state SC
4 is checked, and according to the result step #201
, #211, #221, #231, #241,
Branches to either #251.

(Status) When SC4 is O, branch to step #201, determine whether copying is in progress, and if so, proceed to step #201.
If not, proceed to step #203 and set the data RAM to be sent to the eraser control circuit 82 to LE.
D 32a Data is set so that all lights from 1 to 7 are turned off. Then, in step #207, the data is actually transmitted. In step #202, it is determined whether or not the sensor 91 immediately before the registration roller pair 23 is turned on. If it is turned off, the process proceeds to step #203, and if it is turned on, the transmission data RAM is
Data is set so that all of the EDs 32a1 to 32a7 are lit, the image forming area up to the leading edge of the image is erased, and a timer T is set so that the copy sheet 7 is looped by the registration roller pair 23 and the leading edge is aligned. state SC4 to 1
Then proceed to step #207.

When state SC4 is 1, the process proceeds to step #211, and it is determined whether or not timer T1 has expired. If not, the process proceeds to step #207, and if it has finished, the process proceeds to step #2.
212 and #213, the scanning system motor M1 is operated to set the state SC4 to 2, and then the process proceeds to step #207.

When state SC4 is 2, proceed to step #221,
It is determined whether the scanning system predetermined position detection switch 92 is turned on or not. If it is turned off, the process proceeds to step #207. If it is turned on, the process proceeds to steps #222-#224 until the index mark at the leading edge of the image reaches the position of the eraser unit 32. After setting the timer T2 and setting the state SC4 to 3 and turning on the clutch CLl of the registration roller pair 23, step #
Proceed to 207.

When state SC4 is 3, proceed to step #231,
It is determined whether or not the timer T2 has expired. If the timer T2 has not expired, the process proceeds to step #207; if it has finished, the process proceeds to step #232. At step #232, flag F1 is set to “
Determine whether it is 1# or "0", and if it is "1", it is the index mark imprinting mode, so proceed to step #233, and only the LED corresponding to the index mark corresponding to the currently set index mark position number is turned off. Set the data to the timer T for the width of the index mark (dimension in the direction of two rotations of the photosensitive drum).

is set, and state SC4 is set to 4. Since no index mark is formed when the flag F1 is 0'', all LEDs corresponding to index marks of all position numbers are lit in step #236, and steps #234 and #
235 and #207.

When the state SC4 is 4, the process proceeds to step #241, and it is determined whether or not the timer T3 has expired. If it has not finished, the process directly proceeds to step #207, and if it has finished, the LED is turned off in steps #242 to #244. 32a r
Set the data transmission RAM so that ~7 is all turned off,
Set timer T4 for the image width and set state SC4 to 5.
Make it.

When state SC4 is 5, the process proceeds to step #251, and it is determined whether or not timer T4 has expired. If not, the process directly proceeds to step #207, and if it has finished, all LEDs are turned off in steps #252 and #253. The data to be lit is set in the transmission data RAM, the state SC4 is set to 0, and the process proceeds to step #207.

Only when the index mark imprinting mode is selected as described above, only the index mark corresponding to the set position is imprinted and copied onto the copy sheet 7 together with the original image.

Furthermore, the subroutine for automatically updating the mark imprinting position when a large number of originals are copied by the automatic original feeder 100 in step #8 in FIG. 12 will be explained based on the flowchart in FIG. 16.

State SC3 is checked in steps #400 and #400a, and steps #401 and #4 are checked according to the results.
11, or #421.

When state SC3 is 0, proceed to step #401,
Determine whether or not copying is in progress, and if copying is not in progress, return directly; if copying is in progress, proceed to step #402; determine whether or not the document has been set in the exposure section; if not, directly return; Once set, the process proceeds to step #403, where the document counter 1 is incremented to count the number of document sheets. Used to change the position of index marks. Next, in step #404, it is determined whether the sensor 109 for detecting a break in the document group is off. If it is on, the process returns as is; if it is off, the state SC3 is incremented in step #405 and the process returns.

The number of originals counted by the original counter l at the time when the sensor 109 turns off and the original ends is the number of originals set on the original tray 101. When state SC3 is 1, the process advances to step #411 and the copy number counter is decremented. This copy counter is set with the required number of copies, and is decremented each time a portion of copying is completed.

Next, in step #412, it is determined whether the copy counter is O or not, and if it is 0, copying is completed, so in step #413, the state SC3 is set to 0 and the process returns. When the copy counter is not O, proceed to step # to copy the next part.
Proceed to 414, set document counter 2 to 0, and step #41
Proceed to step 5. Here, after incrementing the mark number position RAM based on the off signal of the sensor 109 which detected the cut in the document where part of the previous copy ended, step #41
In step 6, it is determined whether the contents of the mark number position RAM are the maximum mark value, and if not, the process directly proceeds to step #418, and if so, in step #417, the mark number position RAM is set to the maximum mark value.
M is set to the minimum mark value so that mark imprinting is repeated from the minimum position. As a result, as shown in FIG. 9, the entire range corresponding to the size of the copy sheet is used to imprint while updating the mark position, and when the limit is reached, imprinting is performed repeatedly from the initial position. After this, in step #418, state SC3 is incremented.

When state SC3 is 2, the process advances to step #421 to copy the next number of copies. In step #421, it is determined whether copying is in progress, and if copying is not in progress, the process returns.
If copying is in progress, it is determined in step #422 whether or not the original has been set. If it has not been completed, the process returns. When it is completed, original counter 2 is incremented in step #423, and original counter 2 is incremented in step #424.
It is determined whether and 2 match, and if they match, state SC3 is set to 1 in step #425 and the process returns.

(Effects of the Invention) Since the present invention has the above-described structure and operation, when copying a large number of sheets or copies, the position of the index mark can be automatically updated around the sheet, and the position of the index mark can be easily updated. The number of columns or mark size is set according to the size of the copy sheet, and the index mark can be used effectively by using the full size of the copy sheet to ensure the maximum number of columns. Can be done.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an electrophotographic copying machine showing a first embodiment of the present invention, Fig. 2 is a perspective view of an inter-image eraser, Fig. 3 is a plan view of the machine body l, and Fig. 4 is a diagram of the operation panel. 5 is a block wiring diagram of the control circuit, 6 is a block wiring diagram of the eraser control circuit, 7 is a plan view of the document break detection sensor, and 8 is a diagram of the document detection sensor in the document tray. Perspective view,
FIG. 9 is a perspective view showing the index mark imprinted state;
FIG. 10 is a perspective view showing an example of the facing state of the copy sheet size detection switch and the sheet cassette, FIG. 11 is a flowchart showing the main routine of overall control, and FIG. 12 is a flowchart of the copy mode setting 1 subroutine.
3 is a flowchart of the copy mode setting 2 subroutine, FIG. 14 is a flowchart of the copy size detection control subroutine, FIG. 15 is a flowchart of the eraser control subroutine, and FIG. 16 is a flowchart of the mark imprinting position automatic update control subroutine. 7・・・－−−−−−−・−・−・−・−・−・−−−
---1--Copy sheet 2------------------------ Photosensitive drum 1
１－－－－－－－－１・−・−・・−−−−−−−−
−1−−−・−Exposure optical system 20.21.33.34・
−・−−−1−−−・Paper feed section 32・・−−1−・−−
---
・・−−−−−−・−Mode selection key 68 for index mark imprinting ・−・・−・−・−・−・−・−・−−−
--Selection key for automatic update mode of index mark imprinting position

Claims (1)

[Claims] (1) An index mark provided on one side of the document placement section, a means for selecting a mode for copying the index mark, and a means capable of erasing the latent image of the index mark formed during the copying process of the document, at least by position. a means for automatically updating the imprinting position of the index mark using an update signal; a means for detecting the size of the copy sheet; and a means for erasing all latent images of the index mark when the index mark imprinting mode is not selected. a first control means for controlling the erasing means to erase a position other than the set position when the index mark imprinting mode is selected; and when the index mark imprinting mode is selected; a second control means for controlling the erasing means or the imprinting position updating means to adjust at least one of the number of stages of change in the imprinting position of the index mark and the size of the index mark in accordance with the copy sheet size detection signal; An index mark imprinting device for an electrophotographic copying machine, characterized by comprising: