JPH08339098A - Double-sided copying device and method - Google Patents

Abstract

PURPOSE: To easily compare the images of two continuous originals having relevance in a spread state by providing a specified original back surface copying mode setting means for specifying the copying destination of the image drawn on one surf ace of the original to the back surface of the paper. CONSTITUTION: By operating the specified original back surface copying mode setting means 83 on a screen, a specified original back surface copying mode is set. In this specified original back surface copying mode, the original whose copying destination is set to the back surface of the paper is specified by an original specifying means. Namely, in the case the images of two continuous originals have relevance, the mode is set by the setting means 83, and the original fed in advance is specified by original specifying means 76 and 78. Then, the operation of a paper carrying device is controlled by a fed paper carrying control means so as to control a paper feeding state, so that the image of the original specified by the specifying means 76 and 78 is copied on the back surface of the paper fed in advance and the image of the next original is copied on the front surface of the paper fed next.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided copying apparatus and a double-sided copying method for copying an image of an original on both sides of a sheet.

[0002]

2. Description of the Related Art A double-sided copying machine for copying an image of an original on both sides of a sheet has already been used. For example, JP-A-64
There is an "recording device with intersheet function" described in JP-A-34857. In this mode, when a separator sheet is inserted between printed materials every time a predetermined number of original images are copied in a mode in which an image drawn on one side of the original is copied on both sides of the paper, the separator sheet is the page of the original. When the number of pages corresponds to an odd number of pages, it is not possible to deal with double-sided copied sheets. Therefore, the number of pages into which a separator sheet is inserted is corrected to an even number of pages corresponding to the number of pages of a document. Further, there is "a recording device with an intersheet function" described in JP-A-64-38374. This is the content of inserting a separator sheet before the first page. Further, there is "an image forming apparatus having a meeting paper insertion function" described in Japanese Patent Application Laid-Open No. 2-152863. This is a content that prohibits copying onto the meeting paper and prohibits insertion of the meeting paper before even-numbered pages at the time of double-sided copying.

As described above, in a double-sided copying apparatus for copying a single-sided original on both sides of a sheet, the sheets are copied alternately on the front side and the back side of the sheet. Since the original image of the original may be printed on the back side of the paper, an apparatus has been developed in which the copy destination is specified on the front side of the paper for the image of the original of the chapter. On the contrary, there is no double-sided copying apparatus in which the copy destination of the image of a specific original is designated on the back side of the sheet and the image of the next original is sequentially copied from the front side of the sheet to be fed next.

[0004]

When copying in order of originals, images of two continuous originals may be copied on the front surface and the back surface of the same sheet. For this reason, if two pages of a table or two related images that are related to each other are drawn on two consecutive manuscripts, both images should be viewed at the same time when copying. It is inconvenient because it cannot be done. Therefore, if the images of two consecutive originals are related and the copy destination of the original to be copied is the front side of the paper, insert a blank sheet in front of the original to make the copy destination. It is conceivable that the front side of the sheet is changed to the back side and the copy destination of the next original is changed to the front side of the next sheet. In this case, the images of two consecutive originals are copied across the back side of the previously fed paper and the front side of the next fed paper. Is possible.

However, it is troublesome to insert a blank sheet between the originals. When there are a plurality of related images having a good viewing direction in the two-page spread state, the number of blank sheets to be inserted between the originals also increases, resulting in poor operability. Also,
Another problem is that it is easy to make a mistake when inserting a blank sheet.

[0006]

According to a first aspect of the present invention, there is provided a double-sided copying apparatus in which a printer for outputting an image of a document read by a scanner, a paper feed section for storing a large number of paper sheets, and a paper sheet ejected from the printer. A double-sided tray for temporarily storing sheets of paper to be stored, and a sheet feeding device for selectively feeding the sheets in the double-sided tray to the printer, and a single-sided original / double-sided copy mode is set. In this case, the paper is selectively fed from the paper feed unit and the double-sided tray to the printer by the paper transport device, and the image drawn on one side of the original is alternately printed on the front side and the back side of the paper. In a double-sided copying apparatus capable of making a copy, a designated original backside copy mode for designating a specific original by the original designating means for designating the copy destination of the image drawn on one side of the original on the back side of the paper. A designated original back side copy mode setting means for setting the mode, and when the designated original back side copy mode is set, the order of copying destinations to paper determined by the single-sided original / double-sided copy mode is observed. The copy destination of the image of the original specified by the original specifying means is specified on the back side of the sheet, and the copy destination of the image of the original to be fed next is set to the front side of the sheet to be fed next. A paper conveyance control means for controlling the operation of the conveyance device is provided.

Here, the front surface of the paper is the paper surface which becomes the upward surface when the papers after copying are stacked in page order.

According to a second aspect of the present invention, in the double-sided copying apparatus according to the first aspect, continuous document designation prohibiting means for prohibiting document designation by the document designating means for a plurality of consecutive originals is provided.

According to a third aspect of the present invention, in the double-sided copying apparatus according to the first aspect, a sheet corresponding to the designated original designated by the original designating means and the copy destination of the succeeding original is supplied to the second paper feeding section. I tried to feed more.

According to a fourth aspect of the present invention, in the double-sided copying apparatus according to the first aspect, when a stapling device is connected to the discharge side of the printer and the designated original back side copy mode is set, the stapling device is added to the stapling device. A staple control unit is provided for automatically setting the operation mode of the stapling device so as to bind a plurality of longitudinal edges of a plurality of conveyed sheets.

According to a fifth aspect of the present invention, there is provided a double-sided copying method according to the first aspect.
In the double-sided copying machine described above, a circulating automatic document feeder is provided for feeding a document stacked on a document stacking unit to a document reading surface of a scanner and then returning it to the document stacking unit, and a designated document backside copy mode is set. In this case, in the process of circulating the document multiple times by the circulation type automatic document feeder and feeding the document to the scanner, the image of the document whose copy destination is set on the front surface of the sheet is fed from the paper feeding unit. Do not copy the image of the original whose copy destination is specified on the back side of the paper by the original specifying unit to the one side of the paper that has been copied to one side of the paper that has been fed from the paper feeding unit. The sheet is ejected to the double-sided tray, and the image of the original document whose copy destination is determined on the back side of the sheet other than the original document designated by the original document designation unit is fed from the double-sided tray. It was to discharge the copied paper to the paper discharge portion by copying the non-copy surface.

A double-sided copying method according to a sixth aspect is the first aspect.
In the double-sided copying machine described above, a non-circulating automatic document feeder for feeding documents to the scanner is provided, and when the designated document back side copy mode is set, the documents are stacked in the stacking order by the automatic document feeder. In the process of feeding once to the scanner, for the image of the document whose copy destination is set on the back side of the paper, copy it on one side of the paper fed from the paper feed section and discharge the paper to the double-sided tray, As for the image of the original specified by the original specifying means and the copy destination is set on the back side of the paper, the image is copied onto one surface of the paper fed from the paper feeding unit, and the paper is ejected to the paper ejecting unit. For an image of a document whose copy destination is determined on the back side of the paper other than the document specified by the document specifying means, is copied to the non-copy side of the paper fed from the double-sided tray and the paper is ejected. To eject It was.

[0013]

According to the first aspect of the present invention, when the images of two consecutive originals among a plurality of originals fed to the scanner are related, the designated original backside copy mode is set, When the document to be fed first is designated by the document designating means, the operation of the paper feeding device is controlled by the paper feed paper transport control means to control the feeding state, so that the document designated by the document designating means is controlled. The image is copied on the back side of the previously fed sheet, and the image of the original document next to the designated original document is copied on the front side of the next fed sheet.

According to the second aspect of the invention, it is possible to avoid the mistake of designating the copy destinations of a plurality of continuous originals on the back surface of the sheet.

According to the third aspect of the present invention, by storing the paper different from the normal paper in the second paper feeding unit, the image of the designated original designated by the original designating means and the image of the succeeding original are displayed. It is possible to make a copy with a paper different from normal paper.

According to the fourth aspect of the present invention, when the designated original backside copy mode is set, the stapler binds a plurality of positions on the side edges in the longitudinal direction of the plurality of sheets to set the backside of the specific sheet. A plurality of sheets as printed matter can be reliably bound in a state in which the image copied to the front surface of the next sheet can be viewed in a two-page spread state.

According to the fifth aspect of the present invention, in the process of circulating a document by the circulating automatic document feeder and feeding it to the scanner a plurality of times, if the images of continuous documents are related, It is possible to copy the two images separately on the back side of the previously fed sheet and on the front side of the next fed sheet, and copy the images of other originals on both sides of the sheet.

According to the sixth aspect of the present invention, in the process of feeding the originals to the scanner by the automatic original feeding device once in the stacking order, if the images of the continuous originals are related, the two images are fed. It is possible to copy the image of the other document on both sides of the sheet while separately copying the image on the back side of the sheet fed first and the front side of the sheet fed next.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. Double-sided copying machine 1 in this embodiment
Is provided with a circulation type automatic document feeder (hereinafter, referred to as RDH in the embodiment) 3 on the top of the housing 2. This RDH
The details of No. 3 are shown in FIG. This RDH 3 is used for the document stacking unit 4
A document (not shown) stacked on the sheet is drawn by the belt 5 and guided to the intermediate conveyance path 7 by the document feed roller 6.
Furthermore, the direction is changed by the turn roller 8 and the contact glass (the original reading surface of the scanner) 1 by the conveying belt 9
0 to the upper surface. Therefore, the original placed on the original placing portion 5 with its one side facing downward is conveyed onto the contact glass 10 with its one side facing downward. In addition, the original on the contact glass 10 is discharged by the switching claw 11 to the discharge path 12
When the reversing sensor 14 detects the trailing edge of the document, the switching claw 11 rotates and the switchback roller 13 reverses, so that the document is switched by the switchback roller 13. The sheet 11 is guided from the sheet discharge path 12 to the normal rotation sheet discharge path 15, and is discharged onto the document stacking section 4 with its one surface facing downward by the sheet discharge roller 16.

When images are formed on both sides of the original and the images on both sides are copied, the original guided from the contact glass 10 to the paper discharge path 12 is directly loaded from the upper part of the paper discharge path 12. By ejecting the original onto the contact glass 10 with one side facing down by ejecting the sheet to the section 4, the opposite side of the original is then turned down.
It is possible to carry on. Also, the document stacking unit 4
A document partitioning claw 18 whose left end is rotated upward by a biasing force and whose right end is detected by the sensor 17 is provided when the final document to be stacked passes. That is, the detection signal of the sensor 17 detects the state in which all the originals stacked on the original stacking unit 4 are conveyed to the contact glass 10.

As shown in FIG. 1, the housing 2 has the R
A scanner 19 for reading an image of a document conveyed by the DH 3, a printer 20, paper feed units 21, 22, 23,
A double-sided tray 24 is provided. The scanner 19
The flash lamp 25 for the original on the contact glass 10
Illuminated by the first mirror 26
The through lens 27 and the second mirror 28 irradiate the belt photosensitive member 29 of the printer 20 to form an electrostatic latent image on the belt photosensitive member 29.

In the printer 20, the belt photosensitive member 29
Is uniformly charged by the charger 30 in the process of rotating the belt counterclockwise, and the electrostatic latent image is formed by the scanner 19 on the charged belt photoreceptor 29.
The eraser 31 removes the unnecessary electric charge above, and the developing device 3
2 develops the electrostatic latent image and transfers the developed image to the transfer unit 33.
Is transferred to a sheet (not shown) by means of a transfer charger, and after the transfer, the transfer image on the sheet from which the belt photoconductor 29 has been separated by the separation charger 34 is fixed by the fixing device 35, and the belt photoconductor 29 after the transfer is discharged by the charge removal charger 36. The charge is removed by the cleaning device 37 and the residual toner on the belt photosensitive member 29 is removed by the cleaning device 37.

Further, the housing 2 is provided with a paper carrying device 38 for carrying paper. This paper transport device 3
8 conveys the paper in the paper feed units 21, 22, 23 or the double-sided tray 24 toward the belt photoconductor 29,
A sheet is supplied by the registration roller 39 synchronized with the rotational movement of the belt photosensitive member 29, and the sheet discharged from the fixing device 35 is conveyed to the double-sided tray 24 or the sheet discharge path 41 according to the direction of the switching claw 40, and further, The paper is conveyed to the paper discharge unit 43 or the finisher 44 arranged on the upper surface of the housing 2 according to the direction of the switching claw 42.

In the finisher 44, the paper discharge path 4
The sheet discharged from sheet 1 is conveyed to the reversing path 47, the finish tray 48, and the staple tray 50 of the stapling device 49 according to the orientation of the switching claws 45 and 46. in this case,
Depending on whether the paper discharged from the paper discharge path 43 is discharged to the finish tray 48 via the inversion path 47 or directly to the finish tray 48, one of the front and back surfaces is selected to face upward. . Further, when the paper is conveyed to the staple tray 50, the edge of the paper is stapled to the stapler 5
After binding by 1, the paper is discharged onto the finish tray 48 by the lift-up belt 50a.

FIG. 3 shows a control block diagram for forming an image on the belt photosensitive member 29 and forming the image on a sheet. First, the CPU 52, the input port 53, and the output port 54 are connected by a bus line. Various sensors are connected to the input port 53. The various sensors include a paper feed sensor 55 that detects the paper fed from the paper feed units 21, 22, and 23, and the double-sided tray 24.
A double-sided paper feed sensor 56 for detecting the paper fed from the fixing roller, a registration sensor 57 for detecting the paper reaching the registration roller 39, a fixing sensor 58 for detecting the paper discharged from the fixing device 35 at different positions, Double-sided branch sensor 59, paper discharge sensor 60, paper discharge sensor 61, synchronization mark formed on the belt photoconductor 29 (described later)
The mark sensor 62 and the like for detecting

Then, the CPU 52 causes the various sensors 5 to
A power pack 63 and a motor control circuit 64 are connected to the output port 54 so as to control the output system by inputting signals from 5 to 62. The power pack 63 is connected to the charging device 30, the transfer device 33, the separation charger 34, a flash power supply 65 for driving the flash lamp 25, and the like. The motor control circuit 64 has an encoder 66 and the belt. A motor 67 that drives the photoconductor 29 is connected.

Since the belt photosensitive member 29 has a seam, it is necessary to form an image while avoiding the seam. In order to determine the position of the image formation, the mark sensor 62 described in FIG. 3 detects the synchronization mark 68 (see FIG. 4) formed on the belt photoconductor 29. The belt photoconductor 29 is rotated by inputting a drive signal from the output port 54 to the motor control circuit 64 and driving the motor 67. At this time, the pulse from the encoder 66 is supplied to the motor control circuit 64 to rotate the motor 67 at a constant speed. Further, the pulse from the encoder 66 is also input to the frequency divider 69, frequency-divided by the frequency divider 69 at a predetermined frequency division ratio, and then counted by a counter (not shown) of the CPU 52. Since this count value is proportional to the moving distance of the belt photosensitive member 29, the image forming area (segment) is determined by the count value.

FIG. 4 is a plan view in which the belt photosensitive member 29 is cut at a joint and developed. There are five A4 image forming areas 70 indicated by a chain line, and B4 image forming areas 71 indicated by a broken line.
Is four, and the image forming area 72 of A3 indicated by a chain double-dashed line is three.
The individual pieces are set to have equal intervals.

Next, the copy sequence will be described. When making a copy of A4 size, the sequence operation is started when the leading end of the image forming area 70 reaches a predetermined position, and the counter for sequence control starts the operation. This counter counts up by the pulse signal from the frequency divider 69 and is cleared when the sequence control is completed. The operation of each unit will be described below in the order of the count value (CNT) of the counter.

In CNT 1, a signal is output from the output port 54 to the power pack 63, and the charger 30 operates to uniformly charge the belt photosensitive member 29. On the one hand, RDH
The feeding of the document according to No. 3 is started. In CNT 2, the output port 54 outputs a charge start signal to the flash power supply 65, and charges are stored in a capacitor inside the flash power supply 65. In CNT 3, flash power supply 6
Since the flash signal is output to 5, the flash lamp 25 is turned on. As a result, the contact glass 10
The original set on is illuminated, an image of the original is formed as an electrostatic latent image on the belt photosensitive member 29, and the original on the contact glass 10 is ejected. In CNT 4, the tip of the electrostatic latent image on the belt photosensitive member 29 reaches the eraser 31, the part corresponding to the image of the eraser 31 is turned off, and the paper is fed from any of the paper feed units 21, 22, 23 and the double-sided tray 24. Paper feeding starts. In CNT 5, the trailing edge of the electrostatic latent image on the belt photosensitive member 29 reaches the eraser 31, all the erasers 31 are turned on, the excess charges on the belt photosensitive member 29 are removed, and the electrostatic latent image for copying is erased. Only the statue is left. This electrostatic latent image is developed by the developing device 32, and when the developed image reaches the transfer device 33, it is transferred to a sheet.
In this case, when transferring to the front surface of the paper, the paper feeding unit 2
When a sheet is fed from any one of the sheets 1, 22 and 23 and is transferred to the back side of the sheet, the sheet copied before that and stored in the double-sided tray 24 is fed. In both cases, the timing of starting paper feeding differs depending on the paper supply source. The transferred sheet is conveyed to the fixing device 35, and the fixing image is fixed by the fixing device 35. In CNT 6, switching claw 40
Is operated, and the copied paper is discharged to the double-sided tray 24 or the paper discharge path 41 according to the operation status. CNT 7
Then, the switching claw 42 is operated, and the copied paper is discharged to the paper discharge unit 43 or the finisher 44 according to the operation status.

Next, the operation unit 7 will be described with reference to FIGS.
Various keys 3 and their functions will be described. The operation unit 73 is arranged in a part of the housing 2 shown in FIG.
By operating this, the mode clear / preheat key 74 has a function of clearing the mode, in which each mode set up to that time is returned to the standard mode. When the mode is returned to the standard mode, the number of repeats is set to 1, the copy density is set to automatic density, the paper feed is set to automatic paper feed selection, the scaling ratio is set to the same size, and special functions such as double-sided copy are canceled. . The function of the preheat key is an alternate switch, which is operated to preheat the device and release the preheat state. In the preheated state, the fixing device 35
Is controlled to a low temperature state, only the preheat lamp is turned on, and other displays are turned off to save power consumption.
The operation of the preheat key is invalid during the copy process.

The interrupt key 75 is operated when performing interrupt processing. The enter key 76 is operated when inputting a numerical value for zoom magnification and binding, and will be described later,
This is also used to specify the original whose copy destination is the back side of the paper. The start key (print key) 77, which is operated when starting a copy operation, also has a function of ready / wait display. The green LED lights up when ready and the red LED lights up when waiting. . The ten-key pad 78 is operated when setting the number of copies, inputting numerical values for zoom magnification, and binding margin. The operation in other cases will be described in detail later. The clear stop key 79 has a function as a clear key operated when releasing the set number of copies during standby and a function as a stop key operated when interrupting the copy operation during the copy operation. The guidance key 80 is operated when displaying the explanation of the basic operation. The program registration key 81 is operated when registering a mode that the user frequently uses. The program call key 82 is operated when calling the registered mode. Special copy key 8
3 is operated when making a special copy. A specific operation method will be described later. The display unit 84 is a liquid crystal type display, and has various display areas and various touch keys on its surface.

That is, as shown in FIG.
The message display 85 is an area for displaying information about the device, such as “ready for copying” and “please supply paper”. Reference numeral 86 is a set display area for setting the number of copies and the like. The paper display area 87 displays the paper size and the remaining amount of paper in the paper feeding units 21 to 23 and the large-capacity paper feeding device (not shown). The automatic paper selection key 88 is operated to automatically select paper of the same size as the original. The density adjustment key 89 is operated when the copy density is manually adjusted, and the automatic density key 90 is operated when the copy density is automatically adjusted. The same size key 91 is operated when copying at the same size. Expand key 92 and Reduce key 9
3 is operated when enlarging or reducing the magnification. The zoom key 94 is operated when arbitrarily setting the scaling factor in the range of 64-142%. The paper designation scaling key 95 is operated when automatically enlarging or reducing the image of the original according to the designated paper size. The three double-sided keys 96 are operated to set a single-sided original / double-sided copy mode, a double-sided original / double-sided copy mode, and a double-sided original / single-sided copy mode. The copy creation state of is displayed as a picture in the display area 97. The binding margin key 98 is operated when binding a copied sheet and a binding margin is required. The binding margin key 98 can be set on either the left or right side as long as the binding margin is 21 mm or less. The setting state is displayed on the display area 99.

Further, when the special copy key 83 (see FIG. 5) of the operation section 73 is operated, the special copy mode is set and the screen of the display section 84 changes as shown in FIG. On this screen, operations of an end key 100 for ending the special copy mode, a front cover key 101 and a back cover key 102 for setting a cover mode, and a chapter break key 103 for setting a chapter break mode are displayed.

In the cover mode, when the front cover key 101 is operated, the image of the first document of the document stack is copied onto the cover sheet, and when the back cover key 102 is operated, the final document of the document stack is selected. In this mode, the image is copied onto the cover sheet. The chapter break mode is a mode in which an image of an original document designated as a chapter break is copied onto a chapter break paper. The user selects the paper feed unit that stores the paper used for these covers or chapter breaks, and is set to display the result of the selection.However, if the paper feed unit is not selected, In this embodiment, the sheet feeding unit 22 in the middle stage is filled. Furthermore, if it is set as the cover and chapter break paper feed unit, it is considered that a different paper from the normal paper is loaded in that paper feed unit, and such paper is mistakenly fed. Automatic paper selection to prevent paper from being removed from limitless target paper feeder.

The cover mode and the chapter break mode are modes that are effective for copy modes other than the double-sided original / single-sided copy mode. In the single-sided original / double-sided copy mode, a chapter division mode and an original-specified backside copy mode are further added. It is possible to select (spread mode). That is, in the cover mode and the chapter break mode, a part of the screen of the display unit 84 changes as shown in FIG. On this screen, the cancel key 104 and the end key 10 for canceling or ending the specified mode are displayed.
In addition to 4a, a chapter key 105 for setting a chapter division mode, a spread key 106 for setting a designated original back side copy mode,
A display area 107 for displaying a document designated by the ten keys 78 corresponding to each mode is displayed. In the present embodiment, the designated portion of the original document can be 1 to 10. This designated portion is shifted each time the enter key 76 (see FIG. 5) is pressed. FIG. 8 shows a state in which a value of 5 indicating the fifth original is displayed at the first designated position, and a value of 10 indicating the tenth original is displayed at the next designated place.

Next, FIG. 9 shows a control block diagram for controlling the operation of the operation unit 73. CPU 108, ROM 109 that stores fixed data such as programs, RAM 11 that temporarily stores variable data such as work data
0, interrupt controller 111, communication port 112, LCD controller 113 and display memory 114 for controlling the display section 84, output port 116 for lighting various LEDs 115, touch key & push key 117.
DMA (Direct Memory Access) that reads the input of
The controller 118 is connected by the system bus.

In such a configuration, a desired copy mode is set by the operation unit 73 and the start key 77 is operated to start copying. Unless a mode setting operation is performed, the normal single-sided original / single-sided copy mode is maintained. In this case, a predetermined number of originals are sequentially fed from the RDH 3 and read one by one by the scanner 19, and a copy is made on the paper fed from any of the paper feed units 21 to 23 in the reading order.

When the "both to both" key of the double-sided key 96 is operated, the double-sided original / double-sided copy mode is set.
In this case, for example, if ten originals are placed on the original stacking unit 4 of the RDH 3, the ten originals are continuously fed to the scanner 19 and then the original to be read next is face down. It is returned to the loading section 4. In the process of making a round of the ten originals, the images of all the ten originals are scanned by the scanner 1.
9, the read image of each of the 10 originals is copied onto one side of the sheet fed from any of the sheet feeding units 21 to 23, and the 10 sheets of the copied sheet are stored in the double-sided tray 24.
Is ejected. Then, in the process of reading the image on the opposite side of the ten originals (second round of originals), the double-sided tray 2
The read image for each of the 10 originals is copied onto the non-copy side of the 10 sheets fed from the No. 4 sheet.

When the "single-to-both" key of the double-sided key 96 is operated, a single-sided original / double-sided copy mode is set.
The copy order in this case will be described with reference to FIG. In the figure, a is a sheet of paper which is copied from one side of a new sheet fed from the sheet feeder 21 and is stored in the double-sided tray 24, and b is a sheet of paper which is re-fed from the double-sided tray 24 and is copied onto the non-copy side. The sheet is a sheet to be discharged to a predetermined sheet discharging section (the sheet discharging section 43 on the upper surface of the housing 2 or the finisher tray 48 of the finisher 44). For example, when eight originals are placed on the original stacking unit 4 of the RDH 3, the eight originals are continuously fed to the scanner 19 and then
Then, it is returned to the original stacking unit 4 again with the side to be read facing down. In the process of making one round of the original, only the images of the first, third, fifth, and seventh originals whose copy destinations are designated on the front surface of the paper are read by the scanner 19 and the paper feeding unit 2
1, 3 on one side of the paper fed from any of 1 to 23
The read images of the 5th and 7th originals are copied, and the four sheets of paper a after copying are sent to the double-sided tray 24.
Then, in the second round, the images of the second, fourth, sixth, and eighth originals are read and fed from the double-sided tray 24.
The read images of the second, fourth, sixth, and eighth originals are copied onto the non-copying surface of the sheet of paper a. The paper b copied on the non-copy side is discharged to a predetermined paper discharge unit instead of the double-sided tray 24.

Among the special copy modes, the cover mode and the chapter break mode have been outlined because they are the same as the conventional copy method, but the chapter mode selected from the cover mode and the chapter break mode, and the designated original back side copy are selected. The modes will be described.

Here, the processing based on the input of each key is shown in FIG.
This will be described with reference to the flowcharts shown in FIGS. FIG. 11 is a flowchart showing the input key type determination process. When it is determined that the data is input from the ten-key pad 78, the ten-key process shown in FIG. 12 is performed, and up to two digits of data with 99 being the maximum are displayed in the set display area 86. When it is determined that the operation is the clear key (clear / stop key) 79 during standby, the process proceeds to the clear process shown in FIG. 13 and the display data and digit number data set in the set display area 86 are cleared. When it is determined that the enter key 76 is operated, the document designation data process shown in FIG. 14 is executed. Details will be described later. When it is determined that the operation is the operation of the chapter key 105, a chaptering mode setting process is executed as shown in FIG. If it is determined that the spread key 106 is operated, the designated document back surface copy mode setting process is executed as shown in FIG. When it is determined that the end key 104a is operated, the enter key process is executed and the input screen is closed, as shown in FIG. When it is determined that the operation is the stop key 104, as shown in FIG. 18, the input data all cancel process is executed and the input screen is closed.

By the way, as described above, an image copied in the normal single-sided original / double-sided copy mode, which is not the special copy mode, is selected by the normal copy method when there is no problem in viewing each page alone. The images of the odd-numbered originals are copied on the front side of the paper, and the images of the even-numbered originals are copied on the back side of the paper. Even in this copying method, if there is a relation between the image of the fourth (even-numbered) document and the image of the succeeding fifth (odd-number) document,
Since the image of the fourth document is copied on the back side of the second sheet and copied on the front side of the third sheet, it is possible to see the fourth and fifth pages in the spread state at the same time as printed matter. Therefore, for example, it is convenient to recognize at a glance an image that is related to the images of two continuous originals, such as a table that extends over two pages or data that compares the two.

However, for example, if there is a relationship between the image of the fifth (odd number) document and the image of the sixth (even number) document that follows this, the third image The image of the fifth original is copied on the front side of the sheet of paper, and the image of the sixth original is copied on the rear side of the same third sheet of paper.
It is inconvenient because the image of page and the image of page 6 cannot be seen at the same time.

The advantages of single-sided original / double-sided copying in the special copy mode will be described. First, a chaptering mode or a designated document back side copy mode is selected. That is, as described above, the special copy key 8 shown in FIG.
3 to set the special copy mode, and operate the chapter break key 103 on the screen switched as shown in FIG.
When the chapter key 105 on the screen switched as shown in FIG. 8 is operated, the chaptering mode is set. In the chapter division mode, the ten-key pad 78 is used to specify the number of originals whose copy destination is set on the front surface of the paper.

In the normal single-sided original / double-sided copy mode, as described above, the image of the first original is copied on the front side of the first sheet, and the second original is printed on the back side of the sheet. The image is copied, the image of the third original is copied on the front side of the second sheet, and the fourth image is copied on the back side of the second sheet. In the chapter division mode, if you specify the fourth document as a chapter break, the image of the fourth document can be copied to the front side of the next fed paper. Becomes In this way, in this chaptering mode, the specified original is a front side copy, so it does not make sense to solve the problem of the present invention, but it is checked whether the specified original is the front side or the back side of the paper. Can be avoided.

The spread key 10 on the screen shown in FIG.
When 6 is operated, the designated document back side copy mode (spread mode) is set. In this designated original backside copy mode, the original keyed on the backside of the paper is the numeric keypad 78.
Specify by. If the originals are not continuous, it is possible to specify a plurality of originals. In this case, the display area 107
The display position of the designated document is advanced by operating the enter key 76. Referring to FIG. 19 and FIG. 20, for example, when two copies are to be made, for example, a case in which a document whose copy destination is set on the back side of the paper is designated as the fifth document from among 9 single-sided documents Will be described.

In this case, the copy destinations of the four originals before the designated original are designated in the order of the front side, the back side, the front side, and the back side of the paper as in the normal single-sided original / double-sided copy mode. The copy destination of is specified on the back side of the paper, and the copy destination of the document following that document is
The front side, the back side, the front side, and the back side of the sheet are designated in this order.

Here, the surface of the paper refers to the surface that is the upper side when copied as a printed matter, but the upper surface of the paper in the paper feed units 21 to 23 is not necessarily the surface depending on the paper transport path. Not exclusively. Therefore, the surface of the paper as the printed matter will be described as one surface of the paper in the sheet feeding units 21 to 23 corresponds to the surface as the printed matter. In the figure, a is a sheet of paper that is copied from one side of new paper fed from the paper feed section 21 and is stored in the double-sided tray 24, and a'is that of paper fed from the paper feed section 21 and stored in the double-sided tray 24 without copying. Paper to be used, b is paper a re-fed from the double-sided tray 24,
It is a sheet to be copied onto the non-copy side of a ′ and discharged to a predetermined sheet discharge section (the sheet discharge section 43 on the upper surface of the housing 2 or the finisher tray 48 of the finisher 44).

As a copying order, all nine originals are R
In the process of making one cycle by the DH 3, the image of only the original document whose copy destination is designated on the front surface of the paper is read, and in this process, the paper of the paper feeding unit 21 is fed, and the paper a copied in the order of the original is placed in the double-sided tray 24. To the double-sided tray 24 without copying the image of the specified original to the double-sided tray 24.
Send to 4.

Next, all 9 originals are printed by RDH3.
In the process of patrol as a cycle, the images of all originals are read, and in this process, the read images are copied in the stacking order of the originals. In this case, the image of the original document whose copy destination is designated as one side of the sheet is copied onto the one side of the sheet fed from the paper feeding unit 21, the copied sheet a is sent to the double-sided tray 24, and the image corresponding to the original is Similar to the first cycle, the paper a ′ is sent to the double-sided tray 24 without being copied, and the image of the original whose copy destination is designated on the back side of the paper is the non-copy side of the paper a and a ′ re-fed from the double-sided tray 24. And the sheet is discharged to the sheet discharge unit 43 or the like. In the second round, the paper feeding from the paper feeding unit 21 and the paper feeding from the double-sided tray 24 are alternately performed.

Next, all 9 originals are set to 3 by RDH3.
In the process of making one round as a cycle, the images of the specified original are read in order on the back side of the copy sheet, and the read image is copied to the non-copy side of the sheets a and a're-fed from the double-sided tray 24, and the copy is made. The ejected sheet b is ejected to the ejection unit 43 or the like.

In this way, when making two copies of a document, the document is circulated three times, and each copy is copied. That is,
Assuming that the required number of copies is n, the originals are circulated n + 1 times and copied one by one. In the case of a part of copying, in FIG. 19, after the image reading and copying operations in the first round, the image reading and copying operations shown as the third round are performed as the second round of operations.

FIG. 20 shows the relationship between the printed matter and the original thus obtained. FIG. 4A shows the originals arranged in the stacking order. The same figure (b) is the printed matter after copying. As is clear from this figure, the image of the first original is on the front side of the first sheet, the image of the second original is on the back side, and the third image is on the front side of the second sheet. The image of the document, the image of the fourth document on the back side, the image of the fifth document on the back side of the third sheet, the image of the sixth document on the front side of the fourth sheet, The image of the seventh original is copied on the back side, the image of the eighth original is copied on the front side of the fifth sheet, and the image of the ninth original is copied on the reverse side.

When such a printed matter is opened with pages 5 and 6 spread out, the image of the original is copied on page 5 and
Since the image of the original is copied on the page, images related to each other can be viewed in a spread state.

The above is an example in which the double-sided copying apparatus according to the first aspect is realized by the double-sided copying method according to the fifth aspect. In addition,
The enter key 76 and the ten-key pad 78 have a function as a manuscript designating unit that designates a manuscript whose copy destination of the image drawn on one side of the manuscript is on the back side of the sheet. Also, a special copy key 83, a chapter break key 103, a spread key 10
Reference numeral 6 realizes a designated document back side copy mode setting means for setting the designated document back side copy mode by combining the respective functions. Further, when the designated original back side copy mode is set, the copy destination of the image of the specified original is adhered to in the order of the copy destination to the paper determined by the single-sided original / duplex copy mode. Sheet feeding control means for controlling the operation of the sheet feeding device 38 so as to set the copy destination of the image of the original fed next to the front side of the sheet fed next, , Number of copies,
It is realized by the CPU 52 that monitors the information from the paper feed sensor 55, the double-sided paper feed sensor 56, and the like and controls the operation of each unit.

As described above, the paper corresponding to the copy destination of the designated original document and the succeeding original document is
By changing the color or the like and feeding the sheet from the second sheet feeding unit such as the sheet feeding unit 22 in the middle stage, the image viewed in the spread state can be distinguished from other images and strongly impressed on the viewer. This is an effect corresponding to the invention of claim 3.

Further, in the flowchart shown in FIG. 14, after operating the enter key 76, it is judged in step (displayed as st. In the figure) 1 whether or not there is original designation data, but when it is recognized as the same data in step 2. Displays a warning in step 3. This is to warn of a mistake in designating the same document. In step 4, it is determined whether or not the input original designation data is the designation in the chaptering mode, and if YES is determined, the chaptering data is saved, and the process proceeds to step 6. In this step 6, it is judged whether the input data is maximum. In FIG. 8, the designated area of the document in the display area 107 is 1
Since it was explained as 0 places, the maximum value here is 10,
If it does not exceed this, the next input position in the display area 107 is displayed in preparation for the next original designation.

If it is determined in step 4 that the original designation data is not the data in the chapter division mode, it is determined as the data in the designated original back side copy mode. In this case, it is determined in step 8 whether or not there is n-1 data. Specifically, as described above, when the fifth original is designated, it is determined whether or not the fourth consecutive original is designated before that. If it is specified, copy the image of the fourth document on the back side of the paper,
The image of the fifth document is copied on the back side of the next sheet to be fed, so that both images cannot be seen in a two-page spread state. In order to prevent such a mistake, a warning is displayed in step 9. The same applies when the sixth original is designated after the fifth original. This is an effect corresponding to the invention described in claim 2, and step 9 corresponds to continuous document designation means for prohibiting document designation for continuous documents.

If it is determined in step 8 that the original designation data has been correctly input, it is saved as spread data in step 10. Then, if it is determined in step 11 that at least one original designation data has been input, in step 12,
Staples are selected at a plurality of locations (two locations in this example) and the process proceeds to step 6.

The process of selecting two locations in step 12 is applied when the copied sheets are conveyed to the finisher 44 and bound by the stapling device 49. Hereinafter, the processing in the finisher 44 will be described with reference to FIG. When the copied sheet is conveyed to the finisher 44, the switching claw 42 is directed to the finisher 44. In the case of double-sided copying, since the page order is uniform, the sheet is conveyed to the staple tray 50 without being reversed in the reversing path 47, and is bound by the stapler 51. In the case of A4 size, the sheets are bound at two places with the center of one side in the longitudinal direction as a boundary.
Although not shown, the stapling control means for controlling the operation of the stapling device 49 in this case monitors the state in which a document whose copy destination is to be designated on the back side of the sheet is designated by the CPU, and the stapler is based on the result of this monitoring. It is realized by driving 51.

As a result, in the example shown in FIG. 20, the third sheet of paper with the image of the fifth original copied on the back side and the fourth sheet of paper with the image of the sixth original copied on the front side. To
It can also be continuous like a sheet of double size paper. This connection is highly reliable because there are two binding points instead of one binding point. The operability is also good because the selection of binding at two points is automatically made. Furthermore, when the third and fourth sheets are opened, the continuous fifth and sixth originals can be seen in a two-page spread state. The above is the effect corresponding to the invention of claim 4.

Further, a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the above-mentioned embodiment are designated by the same reference numerals and the description thereof will be omitted. The present embodiment is intended to realize the double-sided copying apparatus according to the first aspect by the double-sided copying method according to the sixth aspect.

In this embodiment, instead of the RDH 3, a non-circulating automatic document feeder (not shown) (hereinafter referred to as ADF) is used.
The document is supplied to the scanner 19 using. In the present embodiment as well, among the nine originals to be copied on both sides of the original, the original to be surely copied on the back side of the paper will be described as the fifth original. The copy destinations of the four originals before the specified original are specified in the order of front side, back side, front side, and back side of the paper, as in the normal single-sided original / duplex copy mode. The copy destination of the original designated on the back side and following the original is designated in the order of the front side, the back side, the front side, and the back side of the paper. In the figure, a is a sheet of paper which is copied from one side of a new sheet fed from the sheet feeder 21 and is stored in the double-sided tray 24, and b is a sheet of paper which is re-fed from the double-sided tray 24 and is copied onto the non-copy side. A predetermined paper discharge unit (for example, the finish tray 4 of the finisher 44)
8) Paper to be ejected, c is a paper of a newly fed paper from the paper feeding unit 21, and the image of the designated original is copied only to the finish tray 48 or the like without passing through the double-sided tray 24. It is a sheet of paper.

First, in the order of copying, in the process of feeding all nine originals through the ADF once and reading the images in the order of the originals, the surface of the first paper fed from the paper feed unit 21 is The image of the first original is copied, and the copied sheet a is sent to the double-sided tray 24. In this case, the number of sheets to be copied for each original is arbitrary, and when a plurality of copies is set, continuous copying is performed for each original. The example shown in FIG. 21 is a duplicate copy.
The image of the second original is copied onto the non-copy side of the paper a re-fed from the double-sided tray 24, and the copied paper b is copied.
Is discharged to the finish tray 48 or the like. Similarly, the image of the third original is copied from the paper feeding unit 21 onto the front surface of the paper newly fed, and the copied paper a is printed on the double-sided tray 2.
The image of the fourth original is sent to the non-copy side of the sheet a re-fed from the double-sided tray 24, and the copied sheet b is discharged to the finish tray 48 or the like. The image of the fifth original whose copy destination is specified on the back side of the sheet is copied onto one side of the sheet newly fed from the sheet feeding section 21, and the copied sheet c is directly discharged to the finish tray 48 or the like. To do. For subsequent manuscripts,
Copy in the same order as you would copy a document.

In the case of discharging the papers copied on both sides in this way, when the papers copied on both sides are viewed individually,
Since the back side copy is performed after the front side copy, FIG.
In the above, the sheet that has passed through the fixing device 35 is discharged with the back copy surface facing upward, and if it is discharged to the finish tray 48 without being reversed, it is discharged with the back copy surface facing upward. The next ejected paper is stacked on top of the paper with the back side copy side facing up. Papers obtained by copying the designated original on only one side are stacked with the copy side facing up. The sheets discharged thereon are stacked with the front copy side corresponding to the original facing downward and the back copy side corresponding to the original facing upward. In this state, the first page of paper that has been ejected first is the bottom layer, so the state in which the copy bundle is turned over after all copying is completed
It is a normal state where the pages can be turned from top to bottom. In this state, the image of page 5 corresponding to the original document and the image of page 6 corresponding to the original document face each other due to the relationship between the back surface of the front sheet and the front surface of the rear sheet, and therefore, there is a relation of 5, The image on page 6 can be viewed in a two-page spread state.

The above is the embodiment in which the double-sided copying apparatus according to the first aspect is realized by the double-sided copying method according to the sixth aspect.

[0068]

The double-sided copying apparatus according to the first aspect of the present invention makes it possible to select the designated original back side copy mode, and when a specific original for which the copy destination is designated on the back side of the sheet is designated by the original designation means, it is designated. The copy destination of the image of the original document is copied to the back side of the paper, and the copy destination of the image of the original document to be fed next is copied to the front surface of the paper to be fed next. When the images of two continuous originals among the plurality of originals to be processed are related to each other, both images can be easily compared in the spread state.

According to a second aspect of the present invention, in the double-sided copying apparatus according to the first aspect, a continuous original designation prohibiting means for prohibiting the original designation by the original designating means for a plurality of consecutive originals is provided. It is possible to prohibit designating the copy destination of the original document on the back surface of the sheet, and thus prevent an error in copying a related image to be viewed in the spread state to a distant page.

According to a third aspect of the present invention, in the double-sided copying apparatus according to the first aspect, a sheet corresponding to the designated original designated by the original designating unit and the copy destination of the succeeding original is provided in the second paper feeding unit. Since I tried to feed more paper, by storing different paper from normal paper in the second paper feed section,
The image of the designated original designated by the original designating unit and the image of the next original can be copied on a sheet different from normal sheets to give a strong impression to the person who views the copy.

According to a fourth aspect of the present invention, in the double-sided copying apparatus according to the first aspect, a stapling device is connected to the discharge side of the printer, and when the designated original back side copy mode is set, the stapling device is connected to the stapling device. Since the stapling control means for automatically setting the operation mode of the stapling device is provided so as to bind two central portions in the longitudinal direction of a plurality of conveyed sheets, when the designated original back side copy mode is set, By the stapling device, it is possible to bind a plurality of positions on the side edges in the longitudinal direction of a plurality of sheets and reliably bind the images copied on the back surface of one sheet and the front surface of the next sheet in a spread state.

The double-sided copying method according to the fifth aspect is the first aspect.
In the double-sided copying machine described above, a circulating automatic document feeder is provided for feeding a document stacked on a document stacking unit to a document reading surface of a scanner and then returning it to the document stacking unit, and a designated document backside copy mode is set. In this case, in the process of circulating the document multiple times by the circulation type automatic document feeder and feeding the document to the scanner, the image of the document whose copy destination is set on the front surface of the sheet is fed from the paper feeding unit. Do not copy the image of the original whose copy destination is specified on the back side of the paper by the original specifying unit to the one side of the paper that has been copied to one side of the paper that has been fed from the paper feeding unit. The sheet is ejected to the double-sided tray, and the image of the original document whose copy destination is determined on the back side of the sheet other than the original document designated by the original document designation unit is fed from the double-sided tray. Since a copy is made on the non-copy side and the copied paper is ejected to the paper ejecting section, there is a relation of continuous originals in the process of feeding the originals to the scanner by the circulation type automatic original feeder. Images can be copied so that they can be viewed in a two-page spread.

The double-sided copying method according to the sixth aspect is the first aspect.
In the double-sided copying machine described above, a non-circulating automatic document feeder for feeding documents to the scanner is provided, and when the designated document back side copy mode is set, the documents are stacked in the stacking order by the automatic document feeder. In the process of feeding once to the scanner, for the image of the document whose copy destination is set on the back side of the paper, copy it on one side of the paper fed from the paper feed section and discharge the paper to the double-sided tray, As for the image of the original specified by the original specifying means and the copy destination is set on the back side of the paper, the image is copied onto one surface of the paper fed from the paper feeding unit, and the paper is ejected to the paper ejecting unit. For an image of a document whose copy destination is determined on the back side of the paper other than the document specified by the document specifying means, is copied to the non-copy side of the paper fed from the double-sided tray and the paper is ejected. To eject Since the, in the process of feeding the document on the scanner by the automatic document feeder, it can be copied as can be seen in a state spread the image that is relevant for the document to be continuous.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a double-sided copying machine according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional side view showing the circulating automatic document feeder of FIG.

3 is an explanatory view showing a scanner, a printer, a paper feeding unit, and a double-sided tray of the double-sided copying apparatus of FIG. 1 in section along with a control block diagram.

FIG. 4 is a development view showing a part of the belt photoreceptor of FIG.

5 is a plan view showing an operation unit of the double-sided copying apparatus of FIG.

6 is a plan view showing a display unit of the operation unit of FIG.

FIG. 7 is a plan view showing a screen of a display unit when a special copy mode is set.

FIG. 8 is a plan view showing a screen of a display unit when a chapter division mode and a designated document back surface copy mode are set.

FIG. 9 is a control block diagram of an operation unit.

FIG. 10 is an explanatory diagram showing a copy operation sequence in a normal single-sided original / double-sided copy mode.

FIG. 11 is a flowchart showing a key type determination process.

FIG. 12 is a flowchart showing ten-key processing.

FIG. 13 is a flowchart showing a clear process.

FIG. 14 is a flowchart showing original designation data processing.

FIG. 15 is a flowchart showing a chaptering mode setting process.

FIG. 16 is a flowchart showing a designated original back surface copy mode setting process.

FIG. 17 is a flowchart showing enter key processing.

FIG. 18 is a flowchart showing an input data all cancel process.

FIG. 19 is an explanatory diagram showing a copy operation sequence in a designated original back surface copy mode.

FIG. 20 is a diagram for explaining the relationship between an original and a printed material in the designated original backside copy mode, (a) is an explanatory view showing a state in which the originals are arranged in order, and (b) is an explanatory view in which printed materials are arranged in order. Is.

FIG. 21 is an explanatory diagram showing an operation sequence of copying in a designated document back side copy mode according to the second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Double-sided copying apparatus 3 Circular automatic document feeder 19 Scanner 20 Printer 21 Paper feeder 22 Paper feeder, second paper feeder 23 Paper feeder 24 Double-sided tray 52 Paper transport control means 76, 78 Original designation means 83 , 103, 106 Designated original back side copy mode setting means st. 9 Continuous manuscript designation prohibition means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kunio Hayakawa 1-3-6 Nakamagome, Ota-ku, Tokyo In stock company Ricoh (72) Inventor Hiroshi Masuyama 1-3-6 Nakamagome, Ota-ku, Tokyo Shares Inside Ricoh Company (72) Inventor Ryoichi Suzuki 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Company, Ltd.

Claims (6)

[Claims] 1. A printer that outputs an image of a document read by a scanner, a paper feed unit that stores a large number of paper sheets, a double-sided tray that temporarily stores paper sheets discharged from the printer, and the paper feed unit. And a paper transport device for selectively feeding the paper in the paper tray and the double-sided tray to the printer, and when the single-sided original / duplex copy mode is set, the paper transport device is used to feed the paper. And a double-sided copying apparatus capable of selectively feeding a sheet from the double-sided tray to the printer and alternately copying an image drawn on one side of the original onto the front side and the back side of the sheet. A designated original back side copy mode setting means for setting a designated original back side copy mode for designating a specific original by the original designation means for designating the copy destination of the image drawn on one side of the sheet on the back side of the paper When the designated original back side copy mode is set, the original designated by the original designation means is adhered to while complying with the order of copy destinations on paper determined by the single-sided original / double-sided copy mode. Paper conveyance control means for controlling the operation of the paper conveyance device so that the copy destination of the image is designated on the back side of the paper and the copy destination of the image of the original to be fed next is determined on the front surface of the paper to be fed next. A double-sided copying machine characterized by being provided with. 2. A double-sided copying apparatus according to claim 1, further comprising continuous document designation prohibiting means for prohibiting document designation by the document designating means for a plurality of consecutive documents. 3. The paper corresponding to the copy destination of the designated original designated by the original designating means and the succeeding original is fed from a different second paper feed section. 1. The double-sided copying machine described in 1. 4. When a stapling device is connected to the paper discharge side of the printer and a designated original backside copy mode is set, a plurality of papers conveyed to the stapling device at a plurality of side edges in the longitudinal direction. 2. The double-sided copying apparatus according to claim 1, further comprising stapling control means for automatically setting an operation mode of the stapling apparatus so that the stapler is bound. 5. The double-sided copying apparatus according to claim 1,
A circulation type automatic document feeder is provided for feeding the documents stacked on the document stacking unit to the document reading surface of the scanner and then returning them to the document stacking unit. In the process of circulating the document multiple times by the automatic document feeder and feeding it to the scanner, the image of the document whose copy destination is set on the front side of the paper is copied onto one side of the paper fed from the paper feed unit. Then, the image is ejected to the double-sided tray, and the image of the original document whose copy destination is designated on the back side of the sheet by the original designation unit is not copied to the sheet fed from the sheet feeding section, and the sheet is placed on the double-sided tray. The image of the original that is ejected and the copy destination of which is specified on the back side of the paper other than the original specified by the original specifying means is copied to the non-copy side of the paper fed from the double-sided tray. Duplex method is characterized in that the copy the paper to be discharged to the paper discharge portion. 6. The double-sided copying apparatus according to claim 1,
A non-circulating automatic document feeder for feeding documents to the scanner is provided, and when the designated document back side copy mode is set, the automatic document feeder feeds the documents once to the scanner in the stacking order. In the process, for the image of the original document whose copy destination is set on the back side of the paper, copy it on one side of the paper fed from the paper feed section, discharge the paper to the double-sided tray, and specify it by the original designation means. The image of the original document whose copy destination is set on the back side of the paper is copied on one side of the paper fed from the paper feeding unit, is ejected to the paper ejection unit, and is designated by the document designation unit. In addition to the above-mentioned originals, images of originals whose copy destination is set to the back side of the paper are copied to the non-copy side of the paper fed from the double-sided tray and the paper is ejected to the paper ejection unit. Double-sided compound characterized by Method.