JPH01288867A - Image forming device - Google Patents

Abstract

PURPOSE:To eliminate the need of putting pages in order by an operator's manual work, and to raise the operability by returning automatically a document bundle to an initial state, when a signal for suspending an operation is generated in the course of a copy operation. CONSTITUTION:The title device is provided with a recirculating type document feeding device (RDF) 300 for feeding a document bundle 302 on a placing tray 301 by one piece each to an exposing position, and returning it to the tray 301 after the exposure. In this state, when a stop key is depressed in the course of feeding a document, it is awaited that the document stops at the exposing position, and when it stops, it is discharged immediately to the tray 301. Also, when the stop key is depressed in the course of a copy processing, a copy which is being operated is completed, and the subsequent copy is suspended and the document is discharged to the tray 301. Subsequently, when the document does not make the round yet, the document is brought to no-load feed, and the document bundle 302 is returned to a state that the pages have been put in order. In this regard, even in the course of the no-load feed, the return operation can be suspended.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming apparatus capable of circulating a bundle of originals to obtain a desired number of copies.

[Conventional technology]

Conventionally, a circulation-type document feeder (hereinafter referred to as RDF) feeds a stack of documents set on a tray one by one from the last page to the exposure position, and returns the documents to the same tray after exposure. ) is known in combination with a device such as a copying machine.

[Problem to be solved by the invention] In such a device, when an operator presses the clear/stop key provided on the operation unit while performing an image forming operation using RDF, at that point RD to stop the image forming operation and eject the original stopped at the exposure position and the original in the bus other than the RDF tray to the tray.
It is known to control F. However, especially when the loading tray and the output tray have a common configuration, the stack of originals is stacked with the exposed originals placed on top of the unexposed originals, and the pages are out of order. This had the disadvantage that page alignment was complicated.

〔the purpose〕

The present invention has been made in view of the above points, and an object of the present invention is to form an image that can improve operability by automatically returning a stack of documents to the initial state when image forming operation is interrupted. The goal is to provide equipment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

! FIG. 3 is a diagram showing the internal configuration of an embodiment of a copying apparatus to which the present invention can be applied. In this figure, 100 is the main body of the copying apparatus, 200 is a bed disk having a double-sided processing function of turning over the recording medium (paper) during double-sided recording, and a multi-recording function of recording multiple times on the same recording medium, 300
is a circulation type document feeder (hereinafter referred to as R) that automatically feeds documents.
400 is a sorting device (hereinafter referred to as a sorter) that stores recorded paper into a plurality of bins, and each of these devices 200 to 500 can be used in combination with the main body 100 as desired. can.

A9 main body (100) In the main body 100, 101 is a document table glass on which a document is placed, 103 is an illumination lamp (exposure lamp) that illuminates the document, 105, 107, and 109 are light reflected from the document, respectively.
Scanning reflective mirror (scanning mirror) that changes the optical path of
Reference numeral 11 indicates a lens having focusing and variable magnification functions, and reference numeral 113 indicates a fourth reflection mirror (scanning mirror) that changes the optical path.

115 is an optical system motor that drives the optical system, 117.11
9 and 121 are sensors, respectively.

131 is a photosensitive drum, 133 is a main motor that drives the photosensitive drum 131, 135 is a high voltage unit, 137 is a blank exposure unit, 139 is a developer, 140 is a developing roller, 141 is a transfer charger, 143 is a separation charger, and 145 is a cleaning device.

151 is the upper cassette, 153 is the lower cassette, 171
1 is a manual paper feed slot, 155 and 157 are paper feed rollers, 1
59 is a registration roller. Further, 161 is a conveyor belt that conveys the recording paper on which an image has been recorded to the fixing side, 163 is a fixing device that fixes the conveyed recording paper by thermocompression bonding, and 1
67 is a sensor used for double-sided recording.

The surface of the photosensitive drum 131 described above is made of a seamless photoconductor using a photoconductor and an electric conductor. The motor 133 starts rotating in the direction of the arrow in the figure. Next, when the predetermined rotational control and potential control processing (preprocessing) of the drum 131 are completed, the original placed on the original platen glass 101 is illuminated by the illumination lamp 103 that is integrated with the first scanning mirror 105. The reflected light from the original is transmitted to the first scanning mirror 105 and the second scanning mirror 105.
Scanning mirror 107, third scanning mirror 109, lens 11
1 and a fourth scanning mirror 113 to form an image on the drum 131.

The drum 131 is corona charged by a high pressure unit 135. After that, the image illuminated by the illumination lamp 103 (
The original image) is exposed to slit light, and an electrostatic latent image is formed on the drum 131 using the known Carlson method.

Next, the electrostatic latent image on the photosensitive drum 131 is transferred to a developing device 139.
The toner image is developed by a developing roller 140 and visualized as a toner image, and the toner image is transferred onto a transfer paper by a transfer charger 141 as described later. .

That is, the upper cassette 151 or the lower cassette 1
The transfer paper in 53 or the transfer paper cassetted in the manual paper feed port 171 is fed into the main unit by a paper feed roller 155 or 157, and is sent in the direction of the photosensitive drum 131 with accurate timing by a registration roller 159. The leading edge of the latent image and the leading edge of the transfer paper are matched. Thereafter, the transfer paper passes between the transfer charger 141 and the drum 131, so that the toner image on the drum 131 is transferred onto the transfer paper.

After this transfer is completed, the transfer paper is separated from the drum 131 by a separation charger 143, guided to a fixing device 163 by a conveyor belt 161, fixed by pressure and heat, and then discharged to the outside of the main body 100 by a discharge roller 165. be done.

After the transfer, the drum 131 continues to rotate, and its surface is cleaned by a cleaning device 145 composed of a cleaning roller and an elastic blade.

B. Pedestal (200) The pedestal 200 is a deck 201 that can be separated from the main body 100 and can store 2,000 sheets of transfer paper.
and an intermediate tray 203 for double-sided copying.

Further, the lifter 205 of the deck 201, which can accommodate 2,000 sheets, is raised according to the amount of transfer paper so that the transfer paper always comes into contact with the paper feed roller 207.

Reference numeral 211 denotes a paper ejection flapper for switching the path between the double-sided recording side or multiplex recording side and the ejection side path; 213.
215 is a conveyance path of a conveyor belt, 217 is an intermediate tray weight for holding down the transfer paper, and the transfer paper that has passed through the paper ejection flapper 211 and the conveyance path 213 and 215 is turned over and stored in the intermediate tray 203 for double-sided copying. Ru. Reference numeral 219 denotes a multiple flapper for switching the path between double-sided recording and multiplex recording, and is disposed between the conveyance paths 213 and 215, and guides the transfer paper to the multiplex recording conveyance path 221 by rotating upward.

Reference numeral 223 is a multiple sheet discharge sensor that detects the end of the transfer sheet passing through the multiple flapper 219. A paper feed roller 225 feeds the transfer paper to the drum 131 through a path 227. 229 is a discharge roller that discharges the transfer paper to the outside of the machine.

During double-sided recording (duplex copying) or multiplex recording (multiple copying), first raise the paper ejection flapper 211 of the main body 100 upwards and move the copied transfer paper to the conveyance path 213 of the pedicle 200.
．． It is stored in the intermediate tray 203 via 215. At this time, the multiplex flapper 219 is lowered during double-sided recording, and the multiplex flapper 219 is raised during multiplex recording. This intermediate tray 203 can store up to 99 sheets of copy paper, for example. The transfer paper stored in the intermediate tray 203 is pressed down by an intermediate tray weight 217.

During the next back-side recording or multiplex recording, the transfer paper stored in the intermediate tray 203 is moved one by one from the bottom to the path 2 by the action of the paper feed roller 225 and the weight 217.
27 to the registration rollers 159 of the main body 100.

C, RDF (circulating document feeder) (300) RDF3
00, reference numeral 301 is a stacking tray on which a document bundle 302 is set. First, when a single-sided document is used, a half-moon roller 304 and a separation roller 303 separate the documents one by one from the bottom of the document bundle, and then a conveyance roller 305 and a full-surface belt 306 After being conveyed to the exposure position of the platen glass 101 via paths I to (3), the sheet is stopped, and the copying operation is started. After the copying is completed, the paper is sent to pass V by large conveyance roller 307 via pass 2, and then sent to pass V by paper ejection roller 30B.
The document is returned to the upper surface of the document bundle 302 again. Reference numeral 309 denotes a recycle lever that detects one cycle of the original.It is placed on the top of the stack of originals at the start of original feeding, and when the originals are fed one after another and the trailing edge of the final original passes through the cycle lever 309,
One cycle of the original was detected as it fell under its own weight.

Next, when using a double-sided original, pass the original once I, I[
Then, by switching the rotatable switching flapper 310, the leading edge of the document is guided to the path ■, and the transport roller 3
05, it passes through path (2) and is conveyed onto the platen glass 101 by the full-surface belt 306, and then stopped. In other words, the large conveyance roller 307 is configured to reverse the document along the routes of passes (1) to (2) to (2).

The number of originals can also be counted by transporting the original bundle 302 one by one through paths I~■~■~■~■ until one cycle is detected by the recycle lever 309.

D. Sorter The sorter (400) has a 25-bin tray and loads and sorts recorded sheets. Sorter operation modes include non-sort mode and sort mode.

There is a collate mode, and when the display on the copying apparatus 100 and the copy start key 605 on the operation unit 600 are pressed, the sorter operates based on the previously selected operation mode.

2) Non-sort mode In the non-sort mode, the bin shift motor does not operate after the start of sort storage, and no bin shift is performed. Therefore, the copied sheets are sequentially ejected from the paper ejection roller 229 of the main body, pass through the non-sheet ejection roller 407, and then
The paper is directly ejected and stacked on the tray.
-2) Note mode In the sorting operation in the sort mode, when the topmost bin is above the sort paper delivery roller 405, the bin movement motor 420 is operated, and the topmost bin is placed above the sheet delivery roller 405. Move the bin until it reaches a low position and stop (this position is called the seat home position).

The copied sheets are sequentially ejected from the paper ejection roller 229 of the main body, enter the conveyance roller 401 of the sorter, and are ejected to each bin 411 from the ejection roller 405 via the path 403. Each time the sheets are discharged into each bin, the bins are raised or lowered by the bin shift motor 420 for collation.

3. Collate Mode In the collating operation in the collate mode, first, as in the sort mode, the bin moving motor 420 is operated to move the bins to the sort home position. The copied sheets are sequentially ejected from the paper ejection roller 229 of the main body, enter the conveyance roller 401 of the sorter, and are ejected to each bin 411 from the ejection roller 405 via the path 403. Then, each time the documents change, the bin is raised or lowered by the bin shift motor 420 to collate the documents.

FIG. 1 shows an example of the arrangement of the operation panel provided on the main body 100 described above. The operation panel has a key group 600 and a display group 700 as described below.

E. Key group (600) In the figure, 601 is an asterisk (*) key, which is used by the operator (user) to set modes such as binding substitution settings and document frame eraser size settings. .

606 is an all reset key, which is pressed to return to the standard mode. Reference numeral 602 is a preheating key, which is pressed to put the machine of the main body 100 into a preheating state and to cancel the preheating state. This key 602 is also pressed when returning from the auto-shutoff state to the standard mode.

605 is a copy start key (copy start key);
Press to start copying.

A clear/stop key 604 functions as a clear key during standby and as a stop key during copy recording. This clear key is pressed to cancel the set number of copies. It is also used to cancel * (asterisk) mode. Also, press the stop key to interrupt continuous copying.

The copying operation stops after the copying at the time when the button is pressed is completed.

Numeric keys 603 are pressed to set the number of copies. It is also used to set the * (asterisk) mode. Reference numeral 619 is a memory key in which the user can register frequently used modes.
You can register in 4 ways.

Copy density keys 611 and 612 are pressed when manually adjusting the copy density. 613 is the AE key,
Press this button to automatically adjust the copy density according to the density of the original, or to cancel AE (automatic density adjustment) and switch the density adjustment to manual. A cassette selection key 607 is pressed to select the upper cassette 1511, the middle cassette 153, and the lower paper deck 201. Further, when a document is placed on the RDF 300, APS (automatic paper cassette selection) can be selected using this key 607.

When APS is selected, a cassette of the same size as the original is automatically selected.

Reference numeral 610 is a same size key, which is pressed to make a same size (original size) copy. Reference numeral 616 is an auto-magnification key, which is pressed to automatically reduce or enlarge the original image according to the specified transfer paper size. 617 and 618 are zoom keys, which are pressed to specify any magnification between 64% and 142%. 608 and 609 are fixed size scaling keys, which are pressed when specifying reduction or enlargement of the fixed size.

A double-sided key 626 is pressed to make a double-sided copy from a single-sided original, a double-sided copy from a double-sided original, or a single-sided copy from a double-sided original. 625 is a binding margin key, which can create a binding margin of a specified length on the left side of the transfer paper. 62
4 is a photo key, which is pressed when copying a photo original.

Reference numeral 623 is a multiple key, which is pressed when creating (combining) an image from two originals on the same side of transfer paper.

Reference numeral 620 denotes a document frame erase key, which the user presses when erasing the frame of a standard size document.The size of the document at that time is set using the asterisk key 601.

Reference numeral 621 is a sheet frame erase key, which is pressed to erase the frame of the document according to the cassette size.

622 is a page continuous copying key, which allows you to copy the left and right pages of a manuscript.
Copy each item on separate sheets of paper. Press sometimes.

Reference numeral 614 is a paper ejection method (stable, sort, group) selection key, and if a stapler that can staple recorded paper is connected, the stable mode and sort mode can be selected or canceled, and the sorting mode can be selected. If a tray (sorter) is connected, you can select or cancel sort mode and group mode.

Reference numeral 615 is a paper fold selection key that allows you to select or cancel Z-fold, which folds A3 or B4 rise recorded paper into a Z-shaped cross section, or half-fold, which folds A3 or B4 size recorded paper in half. .

Reference numeral 650 is a key that enables a selection operation between a first mode in which the bin is moved to an initial setting position (seat home position) before the start of sheet storage, and a second mode in which the bin is not moved. .

and display group (700). In Fig. 4, 701 is an LCD (liquid crystal) type message display that displays information regarding copying. For example, 5 x 7 dots form one character, and 40
The text message and the copying magnification set using the standard magnification keys 608 and 609, the same magnification key 610, and the zoom keys 617 and 618 can be displayed. This display 701 is a transflective liquid crystal display and uses two colors for the backlight.Normally, a green backlight is lit, and an orange backlight is lit when an abnormality occurs or when copying is not possible.

Reference numeral 706 denotes an equal magnification display, which lights up when equal magnification is selected. Reference numeral 703 is a color developer indicator, which lights up when a sepia developer is set. A copy number display 702 displays the number of copies or a self-diagnosis code. 70
5 is a used cassette indicator, which indicates the upper cassette 151;
It is displayed whether the middle cassette 153 or the lower deck 201 is selected.

704 is an AE display, and the AE key 613
Lights up when (automatic density adjustment) is selected.

Reference numeral 709 is a preheating indicator, which lights up in the preheating state. When in the auto shut-off state, this indicator 70
9 blinks. 707 is a ready/wait indicator, which is a two-color LED of green and orange; green lights up when ready (copy possible), and lights up when wait (copy possible).
(When copying is not possible), the color lights up orange.

A double-sided copy indicator 708 lights up when either double-sided copying from a double-sided original or double-sided copying from a single-sided original is selected.

Note that when using RDF300 in standard mode, the number of copies is 1, density AE mode, automatic paper selection, same size, and single-sided copying from a single-sided original is certified. RDF300
When not in use, the standard mode is set to 1 copy, manual density mode, same size, and single-sided originals are set to ``1-sided copy''.The difference between when RDF300 is used and when it is not used is RD
Determined by whether or not an original is set on the F300.

Further, 710 is a power lamp, which lights up when the power switch is turned on.

Figure 1 shows an example of the circuit configuration of the control device 800 of the embodiment shown in Figure 1. In the figure, 801 is a central processing unit (CPU) that performs arithmetic control for carrying out the present invention, and uses, for example, a microcomputer V50 manufactured by NEC (NEC Corporation). 803 is a read-only memory (ROM) in which a control procedure (control program) as shown in FIG. 5 according to the present invention is stored in advance;
controls each component device connected via the bus according to the control procedure stored in this ROM. Reference numeral 805 denotes a random access memory (RAM) which is a main storage device used for storing input data and as a working storage area.

807 is an interface (Ilo) that outputs the CPU 801 control signal to the load such as the main motor 33; 809
inputs input signals from the image tip sensor 121, etc., and outputs the CPU 80.
1, an interface 811 is an interface for controlling input/output between the key group 600 and the display group 700. These interfaces 807.809.
811 is an input/output circuit for NEC, for example; display group 700 is each display shown in FIG. 4;
I am using it. The key group 600 is each key shown in FIG. 3, and the CPU 801 can determine which key has been pressed using a known key matrix.

Next, the flow of control in the embodiment of the present invention is shown in FIGS. 4 to 6.
This will be explained using the flowchart shown in the figure. First, the processing in the single-sided mode shown in FIG. 4 will be explained. Set the original at 31, and press S.
2, set the number of copies using the number key 603 from the operation section,
In S3, the single-sided mode is set using the mode key 616, and in S4, the copy start key 707 is turned on to start the process. First, in S5, the RDF 300 sequentially separates and feeds the originals from the bottom, and waits for them to stop at the exposure position of the original platen glass 101 in S6.

During the process of S6, a check is continued at 87 to see if the stop key 604 has been pressed. If the stop key 604 is pressed, as will be described later, if it is not pressed, the exposure position is stopped and the process proceeds to 88, where normal one-sided copy processing is performed.

Then, the process continues until copying of the set number of copies is completed in step 82, and during the process, it continues to check whether the stop key 604 has been pressed in step S10. If it is not pressed as described above, Sll will be pressed after copying the number of copies.
The process proceeds to , completes the copying, ejects the original to the original tray 301 in Si2, checks in S13 whether the original is the final original of one cycle using the cycle lever 309 described above, and returns to S5 if it is not the final original. , 55 to S13 are repeated until the final document. This completes the copying of the set number of copies.

The above is the process when the stop key is not pressed, and hereinafter, the process when the stop key is on, which is the main focus of the present invention, will be explained. First, in S7, it is checked whether the stop key 604 is on while the document is being fed, and if the stop key is on, the process advances to S14 and waits for the document to stop at the exposure position.
Paper is ejected on 01. If this document is being fed, the stop key 6
If check 04 is not performed, there is a drawback that the copying process is temporarily started when the document is stopped, and the copying process is then stopped again, resulting in a lack of quick response.This point has been improved in the present invention.

On the other hand, in SIO, the stop key 60 is pressed during the copy process.
Check whether 4 is on, and if the stop key is on, S1
6, the copying operation is interrupted at an appropriate timing (for example, when the scan of the copy is reversed), and the process proceeds to S15, where the original is discharged to the original tray 301.

This is a stop key check during copy processing, and the copy operation at the time the stop key 604 is pressed is completed, but the next copy operation is stopped so that a half-finished copy is not created. . In the RDF300, all originals have been ejected onto the original tray 301 up to S15, but at this point, the stack of originals on the original tray 301 is stacked with copied originals and uncopied originals, and the page order is out of order. This makes page alignment complicated for the operator. Therefore, in this embodiment, the processing from S17 onwards is performed. In 517, it is checked whether one cycle of the original has been completed, and if not, the process advances to 318, feeds the next original, waits for it to stop at the exposure position in S19, and ejects that original in S20. Perform a blank feed of the original. Further, in S21, the stop key 604 is checked even during this idle feeding, and if it is found, the idle feeding is stopped at that point, and if not, the process returns to S17 and the idle feeding is continued until one cycle of the document is completed. This S17~S
As a result of the processing in step 21, the document stack is brought into a state in which the pages are arranged in the order in which the operator initially set them on the document tray 301, thereby improving operability. Also, stop key 60 is pressed during empty feed.
Since it can be stopped at 4, even if there is a page error in the case of a large number of originals, the operator's request to stop the copying process can be answered quickly.

Furthermore, another embodiment of the present invention will be described using a float yard shown in FIG. 5-1. Steps 81 to S14 are similar to the flowchart in FIG. When the stop key 604 is pressed again when the document is ejected after turning on the stop key 315 mentioned above, the copy process is interrupted and the number of copied documents at that point is saved in S30, and the number of copies of the document is further saved in S31. is also evacuated, and the process proceeds to the aforementioned S17, and the process proceeds to S18, where the document is idle-fed until one circulation of the document bundle is completed. Then, if one cycle of the document bundle is completed in S17, the process is performed in step 53.
Proceed to step 2. Here, the operator checks whether the original bundle returned to the initial state has been removed from the original tray 301, and if it has been removed, the process ends. Also 832'
Checks whether the copy mode has been changed and exits if the change has been made. If the original is not removed and the copy mode is not changed, press the copy key 60 in S33.
4 is turned on again, the processing from S34 onwards is started.

In S34, in accordance with the data on the number of copied originals saved in S30, idle feeding is performed from feeding the original to ejecting the original in steps 835 to S37, the next uncopied original is fed in S38, and the next uncopied original is fed in S39. After stopping at the exposure position in step S40, copy processing is started. The copy process in S40 is 83 in S41.
This is done by subtracting the number of copied copies saved in 1 from the set number of copies in 82 as the number of uncopied copies. Then, in S42, the process waits for the completion of the copy process for that number of copies, and in S43, the document is ejected to the document tray 301, and the process returns to 85 described above to continue the copy process for the remaining documents.

With this process, even if the operator accidentally presses the stop key during copying, the original will return to its initial state, but when the next time the copy key is turned on and the stop key is pressed, the previous copy will be skipped and Since recovery continues from subsequent copies, copy mistakes can be prevented. Furthermore, even if the operator presses the copy start key, then discovers a mistake in the copy mode and presses the stop key, if the mode is changed once the original is returned to its initial state, the operator can remove the original from the tray again. By doing so, you can start copying from the beginning in a new mode, which prevents copy mistakes, and because the original has been returned, it is easier to operate.

In this embodiment, the copying operation is stopped by turning on the stop key, but if this is an interrupt key (for example, the setting may be made using the asterisk key 601).
81 to S31 are the same process (however, S21
is not checked), S32.32' waits for the interrupt to be canceled in S50 as shown in FIG. 5-2, and the process continues from 343 to S5 from the copy key-on in S33 is the same process. Also, in the case of JAM occurrence, S32.32' is the J of S51 as shown in Figure 5-3, as in the case of an interrupt.
The same effect can be obtained with the same processing by simply waiting for AM resolution.

Next, the process of turning on the stop key in the duplex mode will be explained using the flowchart shown in FIG. The original is set in 5101, the number of copies is set in 5102, the duplex mode is set in 5103, and the copy key 605 is waited for to be turned on in 5104.

Copying is started when the copy key is turned on, the document is fed at 5105, the document is reversed at 8106, and while waiting for the document to stop at the exposure position at 5107, it continues to check whether the stop key 604 is on at 5108. If no stop key is pressed,
After stopping the exposure position, start copying the back side with 5109,
While 5ilo waits for the set number of copies to be completed, 5ill continues to check whether the stop key 604 is on. Sl 12
If the stop key is not turned on in , and the copy process is completed, the original is reversed again in 5113, and while waiting for the original to stop at the exposure position in 5114, the stop key 604 is pressed in 5115.
Keep checking if it's on. If the stop key is not turned on and the document stops at the exposure position, the front side copy process is started in 5116, and the process waits for the completion of the copy process for the set number of copies in 5117. During this time, stop key 6 at 8118
Keep checking if 04 is on. Then, if the stop key is not turned on and the copy process of 5119 is completed, 51
At step 20, the completion of one circulation of the document bundle is checked, and the processing at steps 5L05 to 5120 is continued until completion.

This is normal processing in duplex mode without a stop key, but next we will explain the processing when the stop key is on. First, when the stop key 604 is turned on during back side paper feeding in 3108, the process advances to 5121, waits until the document stops at the exposure position, and then advances to 5122. If the stop key 604 is turned on while copying the back side of 5ill, the process goes to 5123, the copy process is interrupted, and the same process goes to 5122.In 5122, the original is reversed and stopped at the exposure position in 5124, and then the original is moved to 5125. It is necessary to recover the front and back sides of the original by discharging it to the original tray 301.Also, if the stop key 604 is turned on while feeding the front side of the original in 5115 for copying the front side, the process returns to 5124.
After the document stops at the exposure position, it is ejected to the document tray 301 in step 5125. If the stop key 604 is turned on while copying the front side of 5l18, the copying process is interrupted at 8126, and the process returns to 5125 to eject the paper to the original tray 301. In the case of this front side, you can simply eject the documents as they are, and the order will be aligned without having to turn the documents over.

812 until one cycle of the document bundle is completed in 5127.
The document is returned to its initial state by repeating the empty feeding of paper at 8, stopping at the exposure position at 5129, and ejecting at 5130. In this way, if you turn on the stop key while processing the back side in duplex mode, the document will be reversed once to make it the front side, ejected, and then the document will be fed a new time. It is possible to return to a document stack containing matching pages.

In addition, a setting key for executing or prohibiting the operation of returning the document to its initial state may be pressed, for example, using the asterisk key 60.
1 may be used for setting.

〔Effect of the invention〕

As described above, according to the present invention, if a signal to interrupt the copying operation is generated before the completion of the copying operation, the document stack is automatically returned to the initial state, so that the operator manually aligns the pages one by one. There is no need to do this (although it can significantly improve operability).

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the internal structure of a copying machine having RDF, which is an embodiment of the present invention, and FIG. 2 is a sectional view showing the operation and operation of the copying machine.
FIG. 3 is a plan view showing the display section and a flowchart showing the flow of control of the copying apparatus. 100... Copy machine main body 200...
・・・・・・Pedestal 300・・・・・・RD
F 400...... Sorter 800... Control device

Claims (10)

[Claims] (1) An original circulation means that feeds a stack of originals placed on a loading section one by one to an exposure position, stops the document, and returns the stack of documents to the aforementioned loading section after exposure is completed, and exposes the original at the exposure position. a copying means for copying an original image onto a recording material by copying an original image onto a recording material; a signal generating means for generating a signal to stop the copying operation before the completion of the copying operation; An image forming apparatus comprising: a control means for stopping a copying operation in response to a signal from the signal generating means and operating a document circulating means to return a stack of documents to an initial state. (2) In claim 1, when the copying operation is copying from a double-sided original, the control means stops the copying operation in response to a signal from the signal generating means, and when the original is ejected. An image forming apparatus characterized in that a document circulating means is operated to return a bundle of documents to an initial state while performing front-to-back matching. (3) In claim 1, if the signal is generated again from the signal generating means during the operation of returning the document bundle to the initial state by the document circulation means, the control means may cause the control means to perform the return operation. An image forming apparatus characterized in that the image forming apparatus is arranged in a middle stage. (4) In claim 1, when the signal from the signal generating means is generated during document conveyance, the control means stops the document at the exposure position and then immediately returns the document bundle to the initial state. An image forming apparatus characterized in that the image forming apparatus starts a return operation of the image forming apparatus, and starts the return operation immediately after exposure is completed when the signal is generated during a copying operation. (5) In claim 1, the control means includes a storage means for storing the number of originals and the number of copies at the time of generation of the signal from the signal generating means, and the control means performs an operation of returning the bundle of originals to an initial state. The image forming apparatus is characterized in that when the copying operation is resumed after the copying operation is completed, the document circulation means is controlled to perform a recovery operation according to information from the storage means. (6) The image forming apparatus according to claim 5, wherein the control means prohibits the recovery operation if the image forming mode is changed after the return operation is completed. (7) The image forming apparatus according to claim 5, wherein the control means feeds the original document up to the original stored in the storage means and resumes the copying operation for the remaining copies. (8) The image forming apparatus according to claim 1, wherein the signal is a signal generated by pressing a stop key. (9) The image forming apparatus according to claim 1, wherein the signal is a signal generated by pressing an interrupt key. (10) In claim 1, the signal is
An image forming apparatus characterized in that the signal is generated due to an abnormality in conveyance of a recording material.