JPH0637989A - Both-side copying device - Google Patents

Abstract

PURPOSE:To accurately and carefully copy the right and left pages of an opened original to both sides of the same recording medium and to copy the right and left pages to one side of a recording medium. CONSTITUTION:The device is provided with a copy mode selectin key 63 selecting a 1st copy mode copying the picture of the right and left pages of the opened original to both sides of the same recording medium and a 2nd copy mode forming the picture of the right and left pages to one side of the recording medium. Whichever mode is selected, the processing is speeded by reading all picture information of the opened original size in a batch by a picture reading means 6 and writing it in a storage means 8. Thus, the good image forming without image deviation can be performed by giving an oprator enough time to set the original and allowing him set the original without fail.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium for recording images of left and right pages of a spread original document such as a book in a spread state.
The present invention relates to a double-sided copying machine capable of forming images on both sides of (transfer paper).

[0002]

2. Description of the Related Art Conventionally, a double-page spread original, which has a document surface on both sides of a central binding portion in a spread state like a book, can be copied in the order of pages on the front and back sides of a transfer paper, respectively. As a copying apparatus, for example, JP-A-60-14625
As described in Japanese Patent Publication No. 5, the left and right pages of the original document in the spread state are divided and scanned twice by an exposure lamp, and the original document is first scanned depending on whether it is right-binding or left-binding. There is a system in which the page to be printed is specified so that the page order of the transfer paper, which is the recording medium copied, is not disturbed.

[0003]

However, such a conventional double-sided copying apparatus capable of forming an image of a two-page spread original in page order, when reading an image of the two-page spread original, divides it into two at the central binding portion. Since the document surfaces on both sides are separately scanned (reading scanning), there is a drawback that it takes a very long time to copy the whole.

Therefore, in order to shorten the copying time as much as possible, it is necessary to hurry as much as possible to change the original set by opening and closing the pressure plate to change the double-page spread for each copy. As a result, there is a problem in that the original may be set while being displaced from the regular position, or may be set obliquely, and a good copy may not be obtained.

The present invention has been made in view of the above problems, and copies the left and right pages of a two-page spread original to the front and back of one recording medium, or copies the left and right pages of the same recording medium. It is an object of the present invention to make it possible to accurately and easily carry out the work when copying the image on one side of a double-page spread original or the image of another page on the back side.

It is another object of the present invention to form an image in the same page order as that of the original on the front and back sides of the recording medium regardless of the orientation of the spread original. Further, even when a sheet-shaped double-sided original is fed by using the automatic original feeder, the same image as the original is efficiently copied in the page order on both sides of the recording medium. It is also intended to do.

[0007]

In order to achieve the above object, the present invention has an image reading means for reading image information from a document, a storage means for storing the read image information, and a storage means for storing the read image information. An image recording unit that reads out image information and forms the image on a recording medium and a recording medium having an image formed on one side are stacked, and the recording medium forms an image on the side on which the image is not formed. For this purpose, a double-sided sheet feeding means for re-feeding the sheet and a double-page spread original key for issuing a command to copy the double-page spread original on both the front and back sides of the recording medium are provided, and when the double-page spread original key is turned on, a copy start command is issued. Regardless of the presence or absence of the recording medium of the double-sided paper feeding means, the image information for the spread document size is written in the storage means, and the image information for the spread document size is divided into a specific area and two areas other than the specific area. An image of a specific area and an area other than the specific area is formed on both front and back surfaces of the same recording medium by using a normal paper feeding means for feeding a new recording medium and a double-sided paper feeding means. When a copy start command is issued in the first copy mode and the spread document key is ON, image information for the spread document size is written in the storage means, and if there is a recording medium in the double-sided paper feeding means, it is stored in the storage means. All the image information stored is read, the image is formed on the surface of the recording medium on which the image is not formed, and then the recording medium is ejected. If there is no recording medium in the double-sided paper feeding means, it is stored in the storage means. Read all the image information that is displayed,
A double-sided copying apparatus is configured by providing a means for selecting a second copying mode in which a new recording medium is fed by a normal feeding means to form an image on one side thereof and then stacked on the double-sided feeding means. It was done.

Further, the number of copies setting means, the image reading means for reading the image information from the original, the storage means for storing the read image information, the image information stored in the storage means, and the image is recorded. The image recording means formed on the medium and the recording medium having an image formed on one side are reversed,
A double-sided paper feeding means for re-feeding the recording medium to form an image on the side on which the image is not formed, and a two-page spread original key for issuing a command to copy the two-page spread document on both front and back sides of the recording medium. When a double-page spread original key is turned on and a copy start command is issued, the image information for the double-page spread original size is written in the storage means regardless of the presence or absence of the recording medium of the double-sided paper feeding means, and the image for the double-page spread original size is written. The information is divided into a specific area and two areas other than the specific area and is read from the storage means, and a normal paper feeding means for feeding a new recording medium and a double-sided paper feeding means are used for both front and back surfaces of the same recording medium. A first copy mode in which images are formed in a specific area and areas other than the specific area, respectively, by the number of copies designated by the copy number setting means, and the spread original key is turned on. When a copy start command is issued, the image information for the spread original size is written in the storage means, and if there is a recording medium in the double-sided paper feeding means, all the image information stored in the storage means is read and the image is recorded. After forming the image on the surface of the medium on which the image is not formed, the recording medium is ejected, and if there is no recording medium in the double-sided paper feeding means, all image information stored in the storage means is read out, and a new recording medium is read. A second copying mode in which the sheets are fed by a normal sheet feeding means, an image is formed on one side thereof, and then the sheets are stacked on the double-sided sheet feeding means by the number of copy designation copies set by the copy number setting means. It is advisable to configure a double-sided copying apparatus by providing a means for selecting.

Further, in the above-mentioned double-sided copying machine, it is preferable to provide a means for designating which side of the spread original is divided into two areas. Further, in the above-mentioned double-sided copying apparatus, it is effective to provide a means for changing the reading order of the specific area and the area other than the specific area from the storage means when forming an image on the recording medium.

[0010]

According to the double-sided copying apparatus having the above-described structure, when the double-page spread original key is turned on and a copy start command is issued,
All the image information for the spread document size is written in the storage means at once, and the image information stored in the storage means is
When the first copy mode is selected, the specific area and two areas other than the specific area are read separately, and the images in the respective areas are formed on both the front and back surfaces of the same recording medium.

When the second copy mode is selected, all the image information stored in the storage means is read out and the image is formed on one side of the recording medium. Therefore, the left and right pages of the two-page spread original are read at one time, which allows the operator to have time to work.

When the first copy mode is selected, the operation start key is pressed to set the copy start command to 1
Images can be formed on both the front and back sides of the same recording medium using the normal paper feed means and the double-sided paper feed means by simply feeding it out, saving the trouble of pressing operation keys on each side Is improved.

If a copy number setting means is provided and the double-sided paper feeding means is a mechanism for reversing and re-feeding the recording medium, the spread original document is copied in a plurality of copies in the first or second copying mode. 1 operation to start copying
The image is repeatedly formed on the recording medium up to the designated number of copies simply by turning the image, which saves labor.

Further, if a means for designating which side of the spread original is divided into two areas is provided, an image of the spread original is formed on both sides of the recording medium in the second copying mode. In this case, even if the original document set and the next document set are set in different directions, the images on the front and back of the document can be changed by changing the designation on the specific region side of the two-spread document. Can be copied on both the front and back sides of the recording medium without disturbing the page.

Further, if a means for changing the reading order of the specific area and the area other than the specific area from the storage means is provided, a plurality of sheet-shaped double-sided originals are conveyed by the automatic original feeding device to read the image. Even if two sheets are arranged in a two-page spread state and the two images are read at once and stored in the storage means, the page order of the recording medium on which the images are formed is changed by changing the reading order of the two areas. Since you can keep it from going crazy, you will have more time to work because the reading time is faster.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a block diagram showing a control device of a double-sided copying machine and its related configuration according to an embodiment of the present invention.
FIG. 2 is also an overall configuration diagram showing the entire double-sided copying apparatus. In this double-sided copying machine, as shown in FIG. 2, a document D such as a book is placed on a contact glass 1 provided on the upper part of the apparatus main body 11, and a copy start key 3 (FIG. 1).
When is pressed, the original surface of the original D is illuminated by the exposure lamp 13 of the image reading means 6 which reads image information from the original,
The light enters the CCD element 14.

Then, the exposure lamp 13 and the mirror unit 15 which also constitutes the image reading means 6 move to the left in FIG. 2, and all the image information on the document surface read by the scanning is read. The image information is stored in the storage means 8 (FIG. 1).

On the other hand, the paper feed cassettes 31, 32 at the selected stage of the normal paper feed means 16 (hereinafter, simply referred to as the paper feed means 16) for feeding the new transfer paper (recording medium) P, or When the transfer paper P is fed from any one of the large-volume paper feeding devices 33 and the sensor (not shown) detects the leading end of the transfer paper P on the conveyance path, the image information written in the storage unit 8 is read at a predetermined timing. Then, correspondingly, laser light is emitted from the image recording means 17 which forms an image on the transfer paper.

The laser light is condensed by a cylinder lens and is incident on a polygon mirror 18 which rotates and scans,
It enters the fθ lens 19, the mirror 20, and a synchronous mirror for detecting the scanning position of the laser light. Then, the laser light that does not enter the synchronous mirror is applied to the photoconductor 21 to form an electrostatic latent image on the surface thereof.

The latent image is visualized by the toner as it passes through the developing device 29, and the visible image is transferred by the transfer charger 22 to the transfer paper P conveyed to the photoconductor 21 and transferred. The visible image is fixed on the transfer paper P by the fixing device 23, which is conveyed in the direction of arrow A in FIG.

On the other hand, after the visible image is transferred onto the transfer paper P, the residual toner on the surface of the photoconductor 21 is removed by the cleaning device 25 having a cleaning blade, and the removed toner is stored in the toner recovery tank. Collected and housed.

Further, at the time of double-sided copying, the transfer sheets P, which are arranged below the discharge bin 24 and have an image formed on one side, are stacked, and the transfer sheet is formed with an image on the side on which the image is not formed. In order to re-feed the paper, the transfer paper P with the image transferred on one side is stacked on the double-sided tray 26 of the double-sided paper feeding means 9, and the re-feeding signal is output at a predetermined timing, so that the double-sided paper feeding The paper is re-fed in the direction of arrow B in FIG. 2 by the paper means 9, the image is transferred to the surface on which the image is not formed, and is guided by the switching claw 27 that is switched to the external discharge side. It is stacked on the discharge bin 24.

This double-sided copying apparatus, as shown in FIG. 1, has a recording medium size detecting means 4 for detecting the size of a transfer sheet as a recording medium, a transfer magnification setting means 5 for setting a transfer magnification, and a spread original. And a two-page spread original key 7 for issuing a command to copy both sides of the transfer sheet.

When the left and right pages of a two-page spread original document such as a book are to be copied on both front and back sides of the same transfer sheet by the double-sided copying apparatus, first, the two-page spread original document key 7 is pressed to make a copy as shown in FIG. When the desired page is opened and placed on the contact glass 1, one end of the page is set to be aligned with the end of the original scale 2 and a copy start command is issued to start copying, the transfer paper of the double-sided paper feeding means 9 is started. Regardless of the presence or absence of the image information, the image information corresponding to the size of the document (two pages) in the spread state is read and stored in the storage unit 8.

Then, as shown in FIG. 3, the manuscript scale 2
Of the two areas divided into a specific area Ba (hereinafter also simply referred to as area Ba) on the side away from the area and an area Aa other than the specific area, only the area Aa other than the specific area is read and an image of the area is supplied. The transfer paper P fed from the paper means 16 is transferred onto one side and is stacked on the double-sided paper feeding means 9 shown in FIG.

Next, the transfer paper P is re-fed from the re-feeding means 9, and this time, the image in the specific area Ba on the side away from the original scale 2 in FIG. 3 is read out and the surface on which the image is not formed. , And discharge it to the discharge bin 24. In this way, the pages to be copied are sequentially reset and copied to obtain the required number of copies.

As described above, this double-sided copying apparatus is provided with the first copy mode for copying the images of the left and right pages of the two-page spread original on both the front and back sides of the same recording medium. A second copy mode is also provided in which the image of the page is copied onto one side of the transfer paper and the image on the back side of the double-page spread original or the double-page spread original of another page is copied on the back side thereof.

The selection of the first copy mode and the second copy mode is performed by the copy mode selection key 63 shown in FIG.
When the first copy mode is selected and the double-page spread document key 7 is turned on and the copy start key 3 is pressed to issue a copy start command, double-sided paper feeding is performed as described above. The image information for the spread document size is written in the storage unit 8 regardless of the presence or absence of the transfer paper of the unit 9, and the image information for the spread document size is divided into a specific region and two regions other than the specific region and the storage unit 8 is provided. Ordinary paper feeding means 1 for feeding new transfer paper read from
6 and double-sided paper feeding means 9 are used to form images on the front surface and the back surface of the same transfer paper, respectively, in the specific area and areas other than the specific area.

When the spread original key 7 is turned on with the second copy mode selected and the copy start key 3 is turned on to issue a copy start command, image information for the spread original size is stored in the storage means. 8 and the transfer paper is present in the double-sided paper feeding means 9, all image information stored in the storage means 8 is read out and the image is formed on the surface of the transfer paper on which the image is not formed. After it is discharged,
If there is no transfer paper in the double-sided paper feeding means 9, all the image information stored in the storage means 8 is read out, a new transfer paper is fed by the normal paper feeding means 16, and the image is printed on one side thereof. After being formed, they are stacked on the double-sided sheet feeding means 9.

A series of controls in the first and second copying modes are all performed by the control device 10 shown in FIG. The control device 10 uses a central processing unit (CPU) having various judgment and processing functions, a signal from the spread original key 7 and a mode selection signal from the copy mode selection key 63, and the like to select the first copy mode or the second copy mode. A ROM that stores a program for each process including a program for executing the signal mode and fixed data, a RAM that is a data memory that stores the process data, and an input / output circuit
(I / O) and a storage means 8.

The storage means 8 is, as shown in FIG. 4, a memory control circuit (a part of the function of the microcomputer) 5
A main scanning address management circuit 51 that manages an address in the main scanning direction by counting a clock CLK of one pixel unit of image information according to the address data from 3, and a sub scanning address management circuit 52 that manages an address in the sub scanning direction. , Which is a bit-map type storage means composed of a bit-map storage circuit (RAM) 50 whose addresses are managed by them, and inputs write video data WVD and sequentially writes it to designated addresses. Reference numeral 54 is a sync signal switching circuit for switching the write / read W / R and the sync signal Lsync.

The control device 10 outputs a signal output when the copy start key 3 shown in FIG. 1 is pressed,
A size signal output from the recording medium size detection means 4 according to the transfer paper size stored in the paper feed cassette of the paper feed stage selected by the paper feed means 16 is output from the transfer magnification setting means 5 to the operator. The transfer magnification signal input by the operation key, the image information signal read by the image reading means 17, and the signal output when the spread original document key 7 is pressed by the recording medium size designating means 62.
From the double-sided sheet feeding means 9 and a signal output according to the size of the transfer sheet P designated by the operator.
A signal output according to the presence / absence of the transfer paper in 6 and a mode selection signal output when the first or second copy mode is selected from the copy mode selection key 63, further according to the document size. In addition to inputting the original size signal output by the above, various detection signals and the like are input from various other sensors.

Then, a signal for causing the image reading means 6 to read the image information corresponding to the size of the spread document and a signal for forming (recording) the image on the transfer sheet are supplied to the image recording means 17. A paper feed signal for feeding a transfer paper on which an image is not formed is fed to the paper means 16, and a transfer paper having an image transferred on one side is stacked on the double-sided tray 26 for the double-sided paper feed means 9. It outputs various driving signals for causing the sheet to be re-fed, and various driving signals for driving the other driving systems of the double-sided copying machine.

FIGS. 5 and 6 are flow charts showing a routine relating to the copy operation processing executed by the control device 10, and the control device 10 repeatedly executes judgment and processing at a predetermined timing according to this routine.

First, in step 1 of FIG.
It is determined whether or not the double-page spread original key 7 on the operation panel (not shown) provided outside the printer is turned on. If the result is NO, and the double-page spread original key 7 is not pressed, the mode is the one-sided copy or double-sided copy of the originals other than the double-page spread original.
Then, the process proceeds to step S4 and the copy operation processing other than the spread original mode is performed.

If YES in step 1 and proceed to step 3, it is determined whether or not the copy start key 3 has been pressed and a copy start command has been issued, and the copy start key must be turned on. For example, if it waits as it is and it is turned on, the process proceeds to step 4, and the image information of the spread original document size of the spread original document set on the contact glass 1, that is, “Aa + for two sheets of transfer paper size shown in FIG.
The image information in the “Ba” area is read and stored in the storage means 8.
To memorize.

Next, in step 5, it is judged whether or not the first copy mode is selected by the copy mode selection key 63 in FIG. 1, and if it is not selected, the process proceeds to step 6, but it is selected. If so, the process proceeds to step 7 in FIG. 6 to start feeding the first transfer sheet P from the sheet feeding means 16 in FIG. 2, and in step 8 the storage means 8 in the previous step 4.
The image information of the area Aa other than the specific area of one transfer sheet near the original scale 2 shown in FIG. 3 is read from the image information of the spread original size (the area of “Aa + Ba”) stored in FIG. An image is formed on one side of the transfer paper P by means of, and in step 9, it is discharged onto the double-sided tray 26 of the double-sided paper feeding means 9 and stacked.

In the next step 10, the re-feeding of the transfer paper P having the image transferred on one side, which is stacked on the double-sided tray 26 of the double-sided paper feeding means 9, is started. Also,
In the next step 11, the spread document size stored in the storage means 8 in the previous step 4, that is, "Aa + Ba"
Of the image information in the area
Read out the image information only and re-feed the transfer paper P
An image is formed on the surface on which the image is not formed, and is discharged onto the discharge bin 24 in step 12.

Then, in step 13, it is judged again whether the double-page spread original key 7 is turned on. If it is not turned on, the process returns to the main routine, and if it is turned on, copying is continued with the double-page spread original. The processing from step 3 onward in step 5 is repeated.

When the determination in step 5 is NO (the second copying mode is selected) and the process proceeds to step 6, the transfer sheet P is placed on the double-sided tray 26 of the double-sided sheet feeding means 9.
It is determined whether or not there is, and if there is, the process proceeds to step 14, but since there is no beginning, the process proceeds to step 15 and the sheet feeding means 1 of FIG.
The feeding of the first transfer sheet P from 6 is started, and all the image information ("A
(a + Ba ”area image information) is read, the image is formed on one side of a new transfer paper P, and in step 17, it is discharged onto the double-sided tray 26 of the double-sided paper feeding means 9 and stacked, and then the main Return to routine.

Then, when the original is set again and the copy start key 3 is pressed again while the spread original key is in the ON state, the process proceeds again to steps 1 → 3 → 4 → 5 to select the second copy mode. If so, the process proceeds to step 6, and this time, since the transfer sheets having the image formed on one side are stacked in the double-sided sheet feeding means 9, the determination in step 6 is YES, so the process proceeds to step 14. move on. In step S14, the re-feeding of the transfer sheets P having the image formed on one side, which is stacked on the double-sided tray 26 of the double-sided sheet feeding means 9, is started.

Then, in the next step 18, after reading all the image information stored in the storage means 8 and forming the image on the surface of the re-fed transfer sheet P on which the image is not formed, In step 19, it is discharged onto the discharge bin 24, the processing is terminated, and the process returns to the main routine.

As described above, in this double-sided copying apparatus, when the page to be copied is opened in the spread state and set on the contact glass 1 and the copy start key 3 is pressed, the spread original key 7 is turned on. The image information of the spread (for example, two sheets of transfer paper in the case of the same size) is read at once without scanning (scanning), and the image information is stored in the storage means 8. Due to the faster copying operation, it is possible to have time margin for changing the original set by opening and closing the pressure plate 28 (FIG. 2).

Therefore, when the original is set, it is unlikely that the original is set in a hurried manner, and the original is set obliquely, so that a good copy can be obtained. It should be noted that the double-page spread original can be efficiently set on the contact glass (FIG. 3) regardless of whether the book is left-opening or right-opening by changing the setting direction. .

FIGS. 7 to 10 are views showing different embodiments of the double-sided copying apparatus, and the portions corresponding to FIGS. 1 to 4 are designated by the same reference numerals. The double-sided copying apparatus according to this embodiment is different from the above-described embodiment shown in FIGS. 1 to 6 in that a copy number setting means 71 for designating the number of copies is provided, and the operation content of the control device 60 is the control shown in FIG. The mechanism of each part is the same as that of FIG. 2 except for a little difference from the device 10, and therefore the illustration thereof is omitted, and it will be described with reference to FIGS. 2 to 4 as necessary.

The control device 60 of this double-sided copying machine is shown in FIG.
The control device 10 includes a microcomputer similar to that of the control device 10 of FIG. 1 and a storage unit 8. Various signals are input from each unit described with reference to FIG. 1, and output according to the number of copies specified by the copy number setting unit 71. Input signal.

Then, when the first copy mode is selected and a copy start command is issued with the spread original document key 7 in the on state, the control device 60 irrespective of the presence or absence of the transfer paper in the double-sided paper feeding means 9. Image information corresponding to the size of the spread document is stored in the storage unit 8
The normal paper feeding means 1 for writing new transfer paper by writing the image data into the specific area and two areas other than the specific area
6 and the double-sided paper feeding means 9 are used to form images of a specific area and areas other than the specific area on both front and back surfaces of the same transfer paper without stacking the transfer papers on the double-sided paper feeding means 9. The copying is repeated for the designated number of copies set by the copy setting unit 71.

When the second copy mode is selected and the copy start command is issued while the spread document key 7 is on, the image information for the spread document size is written in the storage means 8 and the double-sided paper feeding means 9 is used. If there is a transfer sheet, the entire image information stored in the storage means 8 is read out, the image is formed on the surface of the transfer sheet on which the image is not formed, and then the transfer sheet is ejected, and double-sided feeding is performed. If there is no transfer paper in the paper means 9, all the image information stored in the storage means 8 is read out, a new transfer paper is fed by the normal paper feeding means 16 and the image is formed on one side thereof Stacking on the paper feeding means 9 is repeated for the designated number of copies set by the copy number setting means 71.

The selection of the first copy mode and the second copy mode is performed by the operator operating a copy mode selection key 63 provided on, for example, an operation panel outside the double-sided copying apparatus.

Next, as an example of making a copy using the double-sided copying apparatus according to this embodiment, a double-page spread of a document, which is a book, is copied in the first copy mode, and the image is transferred onto one sheet. A case will be described below in which 5 copies are made of pages transferred on both sides of paper. Here, as shown in FIG.
For example, the condition of the length of the conveyance path (the length of one loop of the loop) in the re-feeding path 68 of the double-sided copying apparatus is set within the path in consideration of the image forming timing and the reversal timing of the transfer paper P of the size used. It is assumed that the length is set so that three sheets can be continuously conveyed at the same time.

First of all, as shown in FIG.
When you open the page you want to copy (book), set it on the contact glass 1 and press the copy start key 3, the image information "Aa + Ba" for the spread original size is read,
The image information is stored in the storage means 8.

Further, a new transfer sheet P is fed from a sheet feeding cassette 31 (only one stage is shown and the others are omitted) shown in FIG. 8, and the image recording means is provided on the photosensitive member 21 on one side thereof. The image of the area Aa other than the specific area is formed among all the image information stored in the storage means 8 formed by 17, and the paper is continuously fed at a predetermined interval as shown in FIG. 3 times (P1 to P3), and the image of the area Aa is formed on each of the transfer sheets.

Then, the first transfer sheet P1 on which the image is formed on one side and the front and back sides are inverted by the reversing device 81 and is conveyed without being stacked is the double-sided sheet feeding means 9
(The stack mechanism is not shown in FIGS. 8 and 9)
Detected by the sensor 65 of the
When the position of the photoconductor 21 is again reached for the second image formation, the image of the specific area Ba among all the image information stored in the storage means 8 is transferred, and the second and third transfer sheets P2 are transferred. , P3 is also transferred the image of the specific area,
It is discharged outside the aircraft.

When the image is transferred to the back surface of the third transfer paper P3, the fourth transfer paper P4 is already fed from the paper feed cassette 31 of the paper feeding means 16 as shown in FIG. When the transfer sheet P4 reaches the position of the photoconductor 21, the image of the area Aa other than the specific area is formed again, and the image is similarly formed on the fifth sheet of transfer paper P5 that is subsequently fed. Is transferred, and then the 1st to 3rd transfer sheets P1 to
As in the case of P3, it is inverted and the specific area Ba
Image is formed and is ejected out of the machine.

When the second copy mode is selected and the copy start key is pressed, the image information "Aa + Ba" for the spread document size of the document D set in the spread state is stored as shown in FIG. The image information is written in the means 8 and all the image information is read out, the image is formed on one side of a new transfer paper which has been fed, and it is stacked on a double-sided tray (not shown) of the double-sided paper feeding means 9.

Then, the image formation for two pages on one side of the transfer paper is repeated for the number of copies set by the copy number setting means 71 (FIG. 7), and when it is completed, each of them is next. In order to set an image to be copied on the back surface of the transfer paper, the page of the original is changed and the copy start key 3 is pressed again.

Then, the image information corresponding to the size of the two-page spread original is written in the storage means 8 and the transfer papers stacked in the double-sided paper supply means 9 are sequentially re-fed, and the image of the transfer papers is not formed. An image of all image information (“Aa + Ba” in FIG. 10) stored in the storage unit 8 is formed on the side surface, and the image is ejected to the outside of the machine. Then, this operation is repeated for the number of copies set by the copy number setting means 71.

According to this embodiment, when the first copy mode is selected, the transfer paper is continuously formed without being stacked on the double-sided paper feeding means 9, so that the processing time can be shortened. In addition, since the double-sided paper feeding means 9 does not align the transfer paper by the jogger and then re-feed the paper, the risk of jamming is reduced and the reliability of the transfer paper transportation is improved.

By the way, in each of the above-mentioned embodiments, a means for designating which side of the spread original is divided into two areas is used as a specific area designating key on the operation panel outside the double-sided copying machine, for example. It is good to arrange.

If such a specific area designating key is provided,
When forming a double-page spread original in the second copy mode on both sides of the transfer paper, set the orientations of the first original set and the next original set different (the characters are turned upside down). Even in such a case, by changing the designation of the specific area side of the two-spread original area, it is possible to copy the image on both the front and back sides of the transfer paper while maintaining the page relation between the front and back sides of the original. Therefore, it is possible to prevent the page order from being out of order.

Further, means for controlling so as to change the reading order of the specific area and the area other than the specific area from the storage means when forming an image on the transfer paper (for example, FIGS. 1 and 7).
If a microcomputer similar to the control devices 10 and 60) is provided, a plurality of sheet-shaped double-sided originals are conveyed by the automatic original feeding device and two sheets are arranged in a spread state at the image reading position. Even if the image of the entire surface (two sheets) is read at once and stored in the storage means,
By changing the reading order of the areas, it is possible to prevent the page order of the transfer paper on which the image is formed from being disturbed, so that efficient copying can be performed.

The operation contents will be specifically described below with reference to FIGS. 11 to 13. FIG. 11 is a schematic diagram showing the entire copying apparatus used in this embodiment, and FIG. 12 is a schematic configuration diagram showing the automatic document feeder installed in the copying apparatus. This copying apparatus is equipped with an automatic document feeder 80 on its upper part, and a document D set on a document table 81 of the automatic document feeder 80 is fed from the last page side, and the contact glass 1 The image on the lower surface side is read by the image reading unit 6 after being fed to the upper reading position, and the image information is stored in the storage unit (not shown because it is similar to the storage unit 8 described in FIG. 7). To be done.

On the other hand, the transfer sheet P is fed to the sheet feeding section 86 below the apparatus.
Alternatively, the paper is fed from the manual feed tray 82, and an image is formed on the upper surface side by the image recording means 17 including the photoconductor 21 or the like, and either the paper discharge tray 83 or the discharge bin 94 of the sorter 90 is selected depending on the selected content. Is discharged to the crab.

Further, in the case of double-sided copying, the transfer sheet P having an image formed on one side thereof is not discharged, but the reversing path 85 is used.
To the double-sided sheet feeding means 9
Then, it is re-fed to form an image on the side on which the image is not formed, and then it is discharged.

When copying a single-sided original, the automatic original feeder 80 clearly shows the original table 81 in FIG. 12 so that the image side to be copied faces up and the final page is at the bottom. Set it on top and insert it lightly to the left in FIG. Thereby, the document set detection 8
7 detects the insertion of the original.

When the copy start key of the copying machine is pressed in this state, the calling lever 88 is rotated to press the document D against the calling roller 89, and the transport system is driven by the transport motor to drive the document D to the bottom. From the last page on the side 1
It is separated into sheets and fed onto the contact glass 1 by the conveyor belt 91.

When the leading edge of the document D comes into contact with the stop claw 92 at the position where one end (the left end side in FIG. 12) of the document D projects on the transport path, the transport motor stops and the transport of the document D is stopped. The image of the document is read by the reading means 6 (FIG. 11), and then the stop claw 92 is rotated to the retracting side and the conveyance belt 91 is rotated in the arrow C direction to convey the document D to the right in FIG. Then, it is rotated around the reversing roller 93 and discharged onto the document receiver 97 by the paper discharging roller 96.

In the case of a double-sided original, the first page is set on the original table 81 so that the first page is the uppermost side, and it is fed from the lower side as in the case of the single-sided original.
The document D fed from the lower side is the contact glass 1
Since the image surface of the last page is on the upper side, the originals are conveyed on the contact glass 1 without being stopped and rotated around the reversing rollers 93 due to the necessity of page alignment, and are shown by imaginary lines in FIG. The reversal switching claw 95 rotated to the position shown in the figure reverses the front and back sides, and feeds from the right side to the left side on the contact glass 1 again by the conveyor belt 91 that is reversely rotated in the direction opposite to the arrow C. Then, it is stopped at a predetermined image reading position on the contact glass 1.

Then, after the image is read, the original is inverted again using the above-mentioned inversion path to read the image on the back side, and then it is discharged onto the original receiver 97 by the paper discharge roller 96, The operation is repeated for all the originals on the original table 81. In this copying apparatus, when the transfer paper P on which an image has been formed is directly discharged to the discharge bin 94 of the sorter 90 in FIG. 11 and the page order is not aligned, the transfer paper P is reversed. , And then reverse the front and back, and then discharges them onto the discharge bin 94 to arrange them in page order.

In the case of a user who does not need the sorter 90, since the paper discharge tray 83 is provided in the apparatus main body without mounting the sorter 90, there is no problem, and the space is saved. When this copying machine copies a double-sided original of, for example, 20 pages onto both sides of the transfer paper and attempts to discharge it to the paper discharge tray 83, as described above, in this copying machine, the image of the last page is first transferred. Image is formed on both sides first, so that the fixing device 2
An image of page 19 is formed on the upper surface side of the transfer paper which is directed to 3. Therefore, when the sheet is discharged to the sheet discharge tray 83, the front side and the reverse side are reversed, so that the 19th page side becomes the lower side and the pages are not arranged in the page order.

However, in this embodiment, as described above, since the means for changing the reading order of the specific area and the area other than the specific area from the storage means when the image is formed on the transfer paper is provided, the two-page spread When a document key (not shown because it is the same as the two-page spread document key 7 described in FIG. 7) is turned on and a copy start command is issued, the transfer sheet after the image formation is discharged onto the sheet discharge tray 83. Even in the case of discharging the sheets, it is possible to process them in a short time and arrange them in the page order and discharge them.

Hereinafter, the operation process of processing in a short time by reading an image in a two-page spread double-sided original will be described in detail with reference to FIG. Figure 12
On the document table 81 of the automatic document feeder 80, the first page is set at the top and the last 20 pages are set at the bottom, and the spread document key is turned on and the copy start key is set. Is turned on and a copy start command is issued, the two pages from the bottom of the original on the original table 81 are sequentially inverted on the contact glass 1 as shown in FIG. D19 and D17) are respectively on the lower side, and they are conveyed to a predetermined image reading position in a spread state (horizontal side-by-side state) and stopped.

In this state, the images of the specific areas of pages 19 and 17 and the areas other than the specific area are read at once and stored in the storage means. After that, the two originals are turned upside down using the reversing roller 93 and the reversing switching claw 95 described in FIG.
The 0th page and the 18th page (indicated by D20 and D18) are arranged on the lower side, and the images of the specific area and the area other than the specific area for the two pages are read at once and stored in the storage means.

Next, for page alignment at the time of ejection,
Using the reversing path again, the two originals are reversed again so that page 17 and page 19 are on the lower side, respectively, as shown in FIG. 13C, and the image is not read this time. First, eject the last page from the original side, and
As shown in FIG. 3D, the document is discharged onto the document receiver 97.
Therefore, on the original receiver 97, the originals 20 and 18 are on the lower side and are arranged in page order.

Then, in synchronization with this document discharge, two documents of the next page, that is, a document having 16 pages and one document
When a document with 4 pages (indicated by D16 and D14) is similarly fed onto the contact glass 1 and the same process is repeated, and when the discharge of the document of the last 1 page (D1) is completed, all The process ends.

On the other hand, when the discharge destination of the transfer sheets sequentially fed is designated to the discharge tray 83, the 19th page and the 17th page stored at the first time when the image of the first transfer sheet is formed.
Of the images of the specific area of the page and the area other than the specific area, the image information of page 19 on the specific area side is first read, and then the specific area of pages 18 and 20 stored the second time and the area other than the specific area The image information of 20 pages of the area other than the specific area in the image is read to form an image on the front and back of the transfer sheet, and the image is ejected to the sheet ejection tray 83.

On the second transfer sheet, the image information of the 17th page of the area other than the specific area among the image information stored for the first time is read out first, and then the image information stored for the second time is read out. The image information of 18 pages on the specific area side is read, the images of the respective areas are formed on the front and back of the transfer paper, and the paper is discharged to the paper discharge tray 83, and the same processing is repeated for the subsequent pages.

Further, when the discharge destination of the transfer paper is designated to the discharge bin 94 of the sorter 90, the first transfer paper has the 20th area other than the specific area in the image information stored the second time. The image information of the page is read out first, and then the image information of the 19th page of the specific area is read out from the stored image information stored for the first time, and the image of each area is formed on the front and back of the transfer paper. Discharge it into the discharge bin 94, 2
Of the image information stored the second time, the image information of page 18 on the specific area side is read out on the first transfer sheet, and then the page information of the page 17 of the area other than the specific area of the stored image information stored for the first time is read. The image information is read, images are formed on the front and back of the transfer paper, and the images are discharged to the discharge bin 94, and the same processing is repeated for the subsequent pages.

In this way, a plurality of sheet-shaped double-sided originals are conveyed by the automatic original feeding device two by two and arranged in a spread state at the image reading position, and the two images are read at once and stored. By storing it in the device and changing the reading order of the image information of the specific area and the area other than the specific area according to each discharge destination, it is possible to efficiently output a plurality of double-sided originals without changing the page order. Can be duplicated.

[0080]

As described above, according to the present invention, the image information of the left and right pages of a two-page spread original is read at once and written in the storage means, and the operation key or the like is pressed in the first copying mode. By this, it is possible to form images on both left and right pages on both front and back sides of the same recording medium by issuing one copy start command. In the second copying mode, images on both left and right pages are formed on one side of the recording medium. Since the image of the back side of the double-page spread original and the image of another page can be formed on the back side, it is possible to secure the set as much as the original can be set, so a good image without image misalignment Can be formed.

Since the selection of the first and second copy modes can be easily made by means of selecting those modes, when it is sufficient to simply copy both pages of the two-page spread original, the first copy mode is selected. When the copy mode is a document such as a book or a map that is used in a two-page spread, the second copy mode may be selected, which improves usability.

Further, if the copy number setting means is provided, when copying a plurality of copies of the spread original document in the first or second copy mode, the number of copies to be designated can be set by only one operation to start copying. Since an image is repeatedly formed on the recording medium, labor is saved and operability is improved.

Further, if a means for designating which side of the spread original is divided into two areas is provided, an image is formed on the front and back surfaces of the recording medium in the spread original in the second copy mode. In this case, even if the first original set and the next original set are set in different directions, by changing the designation on the specific area side of the area divided into two, the front and back images of the original Can be copied on both the front and back sides of the recording medium without disturbing the page.

Further, if a means for changing the reading order of the specific area and the area other than the specific area from the storage means is provided, a plurality of sheet-shaped double-sided originals are conveyed two by two by the automatic original feeding device. Even if the two images are arranged in a spread state at the image reading position and the two images are read at once and stored in the storage means, the page order of the images formed on the recording medium is changed by changing the reading order of the two areas. Since it is possible to prevent deviation, it is not necessary to provide a separate reversing device for page alignment, which leads to cost reduction, space saving, and image forming speed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a control device of a double-sided copying machine and its related configuration according to an embodiment of the present invention.

FIG. 2 is also an overall configuration diagram showing the entire double-sided copying apparatus.

FIG. 3 is a plan view showing a specific area Ba of an original reading area and an area Aa other than the specific area when a spread original is set on the double-sided copying apparatus.

FIG. 4 is a block diagram showing a configuration of a storage unit 8 in FIG. 1 and its related configuration.

5 is a flow chart relating to a copy operation process executed by the control device 10 of FIG.

FIG. 6 is a flowchart showing a part of the copying operation processing of the same.

FIG. 7 is a block diagram similar to FIG. 1, showing a different embodiment of the double-sided copying apparatus.

FIG. 8 is a schematic diagram illustrating that three sheets are simultaneously inserted in the re-feeding path in the embodiment of FIG.
It is a schematic diagram showing a state where a sheet of transfer paper is being conveyed.

FIG. 9 is a schematic view showing how the fourth transfer sheet is fed during image transfer of the third transfer sheet in the double-sided copying apparatus.

FIG. 10 is an explanatory diagram showing a document set state when copying a two-page spread document.

FIG. 11 is an overall configuration diagram showing a further different embodiment of the double-sided copying apparatus.

FIG. 12 is a schematic configuration diagram showing an automatic document feeder also mounted on the double-sided copying apparatus.

13A to 13C are explanatory views showing the movement of the originals in the case of performing a copying process in a short time by reading an image in a spread state of a plurality of double-sided originals by using the double-sided copying apparatus of FIG.

[Explanation of symbols]

1 Contact Glass 3 Copy Start Key 6 Image Reading Means 7 Spread Original Key 8 Storage Means 9 Double-sided Paper Feeding Means 10, 60 Control Device 16 Paper Feeding Means 17 Image Recording Means 63 Copy Mode Selection Keys 71 Copy Number Setting Means 80 Automatic Original Feeding Feeder D Original P Transfer paper (recording medium)

Claims (4)

[Claims] 1. An image reading unit for reading image information from a document, a storage unit for storing the read image information, and an image for reading the image information stored in the storage unit and forming the image on a recording medium. A recording means, a recording medium having an image formed on one side thereof, and a double-sided paper feeding means for re-feeding the recording medium to form an image on the side on which the image is not formed; A double-page spread original key for issuing a command to make a copy on both the front and back sides of the recording medium, and when a copy start command is issued with the double-page spread original key on, the double-sided paper feeding means operates regardless of the presence or absence of the recording medium. Image information for the spread document size is written in the storage means, and the image information for the spread document size is divided into a specific area and two areas other than the specific area and read out from the storage means to newly record. A first copy mode in which an image of the specific area and an image of each area other than the specific area are respectively formed on the front and back surfaces of the same recording medium by using a normal paper feeding means for feeding a body and the double-sided paper feeding means. When a copy start command is issued while the spread document key is on, image information for the spread document size is written in the storage means, and if there is a recording medium in the double-sided paper feeding means,
The entire image information stored in the storage means is read out, the image is formed on the surface of the recording medium on which the image is not formed, and then the recording medium is ejected. For example, all image information stored in the storage means is read out, a new recording medium is fed by the ordinary paper feeding means to form an image on one side thereof, and then stacked on the double-sided paper feeding means. A double-sided copying machine, characterized in that it is provided with means for selecting one of the two copying modes. 2. A copy number setting means, an image reading means for reading image information from a document, a storage means for storing the read image information, and image information stored in the storage means for recording the image. An image recording unit formed on a medium and a recording medium having an image formed on one side thereof are reversed, and the recording medium is re-fed for forming an image on the surface on which no image is formed. Means and a double-page spread original key for issuing a command to copy the double-page spread original on both the front and back sides of the recording medium. When a copy start command is issued while the double-page spread original key is in the ON state, the recording medium of the double-sided paper feeding means is provided. Irrespective of the presence or absence of the spread document, the image information for the spread document size is written in the storage unit, and the image information for the spread document size is divided into a specific area and two areas other than the specific area and read from the storage unit. Then, an image of the specific area and each area other than the specific area are formed on both front and back surfaces of the same recording medium by using a normal paper feeding means for feeding a new recording medium and the double-sided paper feeding means. The first copy mode in which the copy copy number setting unit sets the copy specification number of copies to be repeated, and when a copy start command is issued while the spread document key is on, image information for the spread document size is displayed. If there is a recording medium in the storage means and the double-sided paper feeding means,
All the image information stored in the storage means is read out, the image is formed on the surface of the recording medium on which the image is not formed, and then the recording medium is ejected. For example, it is possible to read all the image information stored in the storage means, feed a new recording medium by the normal paper feeding means, form an image on one side thereof, and then stack it on the double-sided paper feeding means. 2. A double-sided copying machine, characterized by further comprising means for selecting a second copy mode in which the number of copies designated by the copy number setting means is repeated. 3. The double-sided copying apparatus according to claim 1, further comprising means for designating which side of the spread original is divided into two areas. Double-sided copying machine. 4. The double-sided copying apparatus according to claim 1, wherein a reading order of the specific area and the area other than the specific area from the storage unit when forming an image on a recording medium is set. A double-sided copying machine provided with means for changing.