JP2003037704A - Imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging device that can accurately print on a tab position and prevent the device from becoming dirty, even when number of tab divisions of tab paper sheets included in an original bundle differs from number of tab divisions of tab paper sheets set to a paper cassette, in the case of copying the original bundle including tab paper sheets. SOLUTION: When number of tab divisions of tab paper sheets included in an original bundle differs from number of tab divisions of tab paper sheets set to a paper cassette in the a case of copying the original bundle including tab paper sheets, the image forming device of this invention corrects a tab image and prints out the corrected tab image on the tab paper sheets.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a copying machine or a printer having a tab insert function for inserting a tab sheet into a bundle of recording sheets and outputting the tab sheet.

[0002]

2. Description of the Related Art Conventionally, a tab sheet on which a heading can be entered is inserted as a partition of a section of a recording sheet,
2. Description of the Related Art Copiers and printers having a tab insert function for outputting a set of recording paper bundles are known.

In the tab insert function, a tab sheet bundle whose tab positions are sequentially displaced is used. For example,
"A tab sheet bundle with a tab division number of 5" in which one tab sheet bundle is composed of 5 tab sheets, and "A tab sheet bundle with a tab division number of 7 in which one tab sheet bundle is composed of 7 tab sheets By sequentially inserting "tab sheet bundle" or the like into a predetermined page of the recording sheet, it is possible to create the partition with the heading position shifted.

A copy mode for copying a document bundle containing tab sheets created by the tab insert function is also conceivable.

[0005]

However, when the copy mode for duplicating an original bundle containing the tab sheets is executed, the tab division number of the tab sheets included in the original bundle and the number of tab sheets set in the sheet cassette are set. The number of tab divisions of the existing tab sheet bundle may be different. For example, this is a case where the tab sheets included in the original bundle are created with a tab sheet bundle having a division number of 5, and the tab division number of the tab sheet bundle set in the paper cassette is 7.

As described above, the tab position and the tab size are different in the tab sheet bundle having different tab division numbers. Therefore, when copying is performed in this state, the tab position of the tab sheet set in the paper cassette is set. Not only will it be misaligned and copied, but not only will the tab sheet not have a heading, but there will be the problem that toner will stick to the device and stain it.

According to the present invention, when a document bundle including tab sheets is duplicated, the tab division number of the tab sheets included in the document bundle and the tab division number of the tab sheet bundle set in the paper cassette are set. It is an object of the present invention to provide an image forming apparatus capable of accurately printing at a tab position even when they are different and preventing the apparatus from being soiled.

[0008]

SUMMARY OF THE INVENTION According to the present invention, when a document bundle including tab sheets is duplicated, the number of tab divisions of tab sheets included in the document bundle and the tab sheet bundle set in a paper cassette are set. When the tab division number is different, the tab image is corrected and printed on the tab paper.

According to a first aspect of the present invention, there is provided tab-free paper accommodating means for accommodating tab-free recording paper which is a recording paper having no tab.
A tab sheet storage unit for storing a tab sheet bundle in which the tab positions of the tab sheets in the tab sheet bundle formed by a plurality of tab sheets are sequentially displaced, and the number of tab sheets included in one tab sheet bundle. A tab sheet number storage means for storing the following, a sheet feeding means for feeding a sheet from the tabless sheet storage means or the tab sheet storage means, and an image forming means for forming an image on the fed sheet. An output sheet bundle forming unit that executes a tab insert mode for forming an image of the specified image data on the tabless sheet or the tab sheet and forming one output sheet bundle, and a tab original included in the original sheet bundle. The tab original number setting means for setting the number of tab originals, the tab original reading means for reading the image data of the tab originals, the number of tab originals set by the tab original number setting means, and the storage means. In the case where the number of the tab sheets are different, an image forming apparatus and a tab image position correction means for correcting the position of the image data of the tab document the tabs original reading means it has read.

According to a second aspect of the present invention, the tab image position correcting means is means for moving the image data of the tab original document.

According to a third aspect of the present invention, there is provided an image forming apparatus in which the tab image position correcting means is means for scaling the image data of the tab original document.

According to a fourth aspect of the present invention, there is provided tab-free paper accommodating means for accommodating tabless paper which is a recording paper having no tab.
A tab sheet storage unit for storing a tab sheet bundle in which the tab positions of the tab sheets in the tab sheet bundle formed by a plurality of tab sheets are sequentially displaced, and the number of tab sheets included in one tab sheet bundle. A tab sheet number storage means for storing the following, a sheet feeding means for feeding a sheet from the tabless sheet storage means or the tab sheet storage means, and an image forming means for forming an image on the fed sheet. An output sheet bundle forming unit that executes a tab insert mode for forming an image of the specified image data on the tabless sheet or the tab sheet and forming one output sheet bundle, and an original sheet bundle including a tab original sheet are provided. A document feeding device for feeding onto the platen, a document tab position detecting means for detecting a tab position in the tab document, and a document reading means for reading image data of the document conveyed by the document feeding device. When the tab position detected by the document tab position detection means and the tab position based on the number of tab sheets stored in the storage means are different, the image data of the tab document read by the document reading means is corrected. The image forming apparatus includes a tab image correction unit.

According to a fifth aspect of the present invention, there is provided an image forming apparatus in which the tab image correction means is means for moving the image data of the tab document.

According to a sixth aspect of the present invention, there is provided an image forming apparatus in which the tab image correction means is means for scaling the image data of the tab document.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the configuration of a digital copying machine DC1 which is an embodiment of the present invention.

In the digital copying machine DC1, the reader unit 1 reads an image of a document and outputs image data corresponding to the document image to the image memory unit 3. The printer unit 2 records an image according to the image data from the image memory unit 3 on recording paper. The image memory unit 3 compresses the image data transferred from the reader unit 1, stores the compressed compressed image data, and decompresses the stored compressed image data,
The decompressed image data is transferred to the printer unit 2, the stored image data is transferred to the external I / F processing unit 4, and the image data transferred from the external I / F processing unit 4 is stored.

The external I / F processing unit 4 performs a predetermined process on the image data transferred from the image memory unit 3 and then outputs the image data to a predetermined external device so that the image data sent from the external device is predetermined. Then, the image data is transferred to the image memory unit 3. Further, the automatic document feeder 6 is connected to the reader unit 1 and feeds the placed document to a predetermined position.

FIG. 2 is a vertical sectional side view showing the structure of the digital copying machine DC1.

In FIG. 2, the digital copying machine DC1 includes a digital copying machine main body 200 and an automatic document feeder (DF) 6
And a platen glass 201 as a document placing table and a scanner 202, and the scanner 202 is composed of a document illumination lamp 203, a scanning mirror 204 and the like.

The scanner is reciprocally scanned in a predetermined direction by a motor (not shown), and the reflected light of the original is transmitted through the lens 207 via the scanning mirrors 204 to 206 and is focused on the CCD sensor in the image sensor unit 208.

An exposure control unit 209 including a laser and a polygon scanner is converted into an electric signal by the image sensor unit 208, and a laser beam modulated based on an image signal subjected to a predetermined image processing described later. The photosensitive drum 211 is irradiated with 219. Around the photosensitive drum 211, a primary charger 212, a developing device 213, a transfer charger 216, a separation charger 217, and a pre-exposure lamp 214.
And a cleaning device 215.

In the image forming section 210, the photosensitive drum 211 is rotated in the direction of the arrow shown in the figure by a motor (not shown), and is charged to a desired potential by the primary charger 212. Laser light 21
9 is irradiated and an electrostatic latent image is formed.

The electrostatic latent image formed on the photosensitive drum 211 is developed by the developing device 213 and visualized as a toner image.

On the other hand, the pick-up rollers 225, 226, 2 from the right cassette deck 221, the left cassette deck 222, the upper cassette 223 or the lower cassette 224.
The transfer papers fed by 27 and 228 are sent to the main body by paper feed rollers 229, 230, 231, and 232, and are fed to the transfer belt 234 by the registrar 233, and the visualized toner image is transferred to the transfer charger 216. Is transferred to the transfer paper by.

After the transfer, the cleaner drum 215 cleans the residual toner on the photosensitive drum 211, and the pre-exposure lamp 214 erases the residual charge. The transfer paper after the transfer is separated from the photosensitive drum 211 by the separation charger 217.
And a fixing device 235 separated by a transfer belt 234.
Sent to.

In the fixing device 235, fixing is performed by applying pressure and heat, and the sheet is discharged outside the main body 200 by the discharging roller 236. The main body 200 is equipped with a deck 250 that can store, for example, 4000 sheets of transfer paper.

The lifter 251 of the deck 250 rises according to the amount of transfer paper so that the transfer paper always contacts the pickup roller 252, and the transfer paper is sent to the main body 200 by the paper feed roller 253. Further, a multi-purpose manual feed 254 capable of accommodating 100 sheets of transfer paper is equipped.

Further, in FIG. 2, the paper discharge flapper 23
7 switches the route between the transport path 238 side and the discharge path 243 side. The lower transport path 240 guides the transfer paper sent from the paper discharge roller 236 through the reversing path 239 to the re-feed path 241 by turning over the transfer paper.

From the left cassette deck 222 to the paper feed roller 2
The transfer paper fed by 30 is also guided to the paper re-feed path 241. The re-feed roller 242 re-feeds the transfer sheet to the image forming unit 210. The discharge roller 244 is arranged near the paper discharge flapper 237, and discharges the transfer paper switched to the discharge path 243 side by the paper discharge flapper 237 to the outside of the machine.

At the time of double-sided recording (double-sided copying), the paper discharge flapper 237 is raised and the conveying path 238 and the reverse path 23 are used.
9. Transfer the copied transfer paper through the lower transport path 240,
The sheet is guided to the sheet re-feeding path 241. At this time, the reversing roller 24
The trailing edge of the transfer sheet is completely removed from the transport path 238 by 5, and is drawn into the reversing path 239 to a position where the transfer sheet is caught by the reversing roller 245, and the reversing roller 245 is rotated in the reverse direction to convey the transport path 240. Send to. In order to reverse and eject the transfer sheet from the main body 200, the sheet ejection flapper 237 is raised and the reversing roller 2 is moved to a position where the trailing edge of the transfer sheet remains in the transport path 238.
The reversing roller 2 is pulled into the reversing path 239 by 45.
By reversing 45, the transfer paper is turned over and sent to the discharge roller 244 side.

The paper discharge processor 290 aligns and closes the transfer paper discharged from the main body 200 of the digital copying machine, and stacks and arranges the transfer paper discharged one by one on the processing tray 294. When the discharge of a part of the image formation is completed, the transfer sheet bundle is stapled, and the discharge tray 292 or the discharge tray 2 is stapled.
It is discharged as a bundle to 93. The paper discharge trays 292 and 293 are vertically moved and controlled by a motor (not shown), and are moved to the processing tray position before the image forming operation is started.

The paper tray 291 is a paper tray for stacking separator sheets to be inserted between the discharged transfer sheets, and is a Z tray.
The folding machine 295 is a Z-folding machine that Z-folds the discharged transfer paper. Further, the bookbinding machine 296 binds a part of the discharged transfer papers, folds the sheets in the center, and performs the bookbinding by stapling, and the bound paper bundle is discharged to the discharge tray 297.

FIG. 3 is a block diagram showing the control system of the digital copying machine DC1.

The CPU 171 is a CPU that performs basic control of the digital copying machine DC1, a ROM 174 in which a control program is written, and a work RAM for performing processing.
175 and the input / output port I / O 173 are connected via an address bus and a data bus.

Input / output port I / O 173 is connected to various loads (not shown) such as a motor and a clutch for controlling the digital copying machine DC1, and inputs (not shown) such as a sensor for detecting the position of the paper. Has been done. The CPU 171 is the RO
In accordance with the contents of M174, input / output control is sequentially performed via the input / output port 173 to execute the image forming operation.

An operating unit 172 is connected to the CPU 171 and controls the display unit and the key input unit of the operating unit 172.

The operator instructs the CPU 171 to switch the display of the image forming operation mode, the scanner reading mode and the print output mode through the key input means,
The CPU 171 displays the state of the digital copying machine DC1 and the operation mode setting by key input. CPU171
An image processing unit 170 that processes a signal converted into an electric signal by the image sensor unit 208 and an image memory unit 3 that stores the processed image are connected to the.

Next, the image processing unit 17 in the above embodiment.
The detailed configuration of 0 will be described.

FIG. 4 shows the image processing unit 1 in the above embodiment.
It is a block diagram which mainly shows the detailed structure of 70.

CCD sensor 20 through lens 207
The image of the original image formed on the image pickup device 8 is input as the data of the luminance of Black and is converted into an analog electric signal by the CCD sensor 208.

The converted image information is input to an analog signal processing section (not shown), where after sample & hold, dark level correction, etc. are performed, the A / D conversion section 501 as a signal processing section. Analog-to-digital conversion (A / D
Then, the digitalized signal is subjected to shading correction (correction of variations in sensors for reading a document and light distribution characteristics of a document illumination lamp). Then log
It is sent to the conversion unit 502.

The log conversion unit 502 stores an LUT (look-up table) for converting the input brightness data into density data, and outputs the table value corresponding to the input data to output the brightness data. Convert to concentration data. After that, the scaling unit 503 scales the image to a desired magnification and inputs the image to the γ correction unit 504.

When outputting the density data, the γ correction unit 504 performs conversion by the LUT in consideration of the characteristics of the printer, and performs output adjustment according to the density value set by the operation unit 172. Then, it is sent to the binarization unit 505.

The binarizing unit 505 binarizes the multivalued density data, and the density value becomes "0" or "255".
The 8-bit image data is binarized and converted into 1-bit image data of "0" or "1", and the amount of image data stored in the memory is reduced. However, when the image is binarized, the number of gradations of the image is changed from 256 gradations to 2 gradations. Therefore, image data with many halftones such as a photographic image is converted into 2 gradations.
When the value is converted, the deterioration of the image is generally remarkable. So 2
It is necessary to make a pseudo halftone expression by the value data.
Here, the error diffusion method is used as a method for pseudo-halftone representation of binary data.

In the error diffusion method, if the density of a predetermined image is higher than a certain threshold value, the density data is "255", and if it is less than the predetermined threshold value, the density data is "0". After binarizing as, the difference between the actual density data and the binarized data is used as an error signal and distributed to surrounding pixels.

In this case, the error is distributed by multiplying a weighting coefficient on a matrix prepared in advance with the error generated by binarization and adding it to surrounding pixels.

As a result, the average value of the densities of the entire image is preserved, and the halftone can be represented in a pseudo binary manner. The binarized image data is sent to the image memory unit 3 and stored as an image. Further, the image data from the computer, which is input from the external I / F processing unit 4, has been processed as binary image data by the external I / F processing unit 4, so it is sent to the image memory unit 3 as it is.

The image memory unit 3 has a high-speed page memory and a large-capacity memory (hard disk) capable of accumulating a plurality of page image data. The plurality of image data stored in the hard disk are output in the order according to the edit mode designated by the operation unit 172 of the digital copying machine DC1.

For example, in the case of sorting, the images of the document bundle read from the automatic document feeder 6 are sequentially output. Read out the image data once stored in the hard disk,
This is repeated multiple times for output. This makes it possible to play the same role as a sorter having a plurality of bottles. The image data output from the image memory unit 3 is sent to the smoothing unit 506 provided in the printer unit 2. The smoothing unit 506 interpolates the data so that the line ends of the binarized image are smooth, and outputs the image data to the exposure control unit 209. Exposure control unit 209
Then, the image data is formed on the transfer paper by the above processing.

Next, the image memory unit 3 in the above embodiment.
The detailed configuration of will be described.

FIG. 5 is a block diagram mainly showing the detailed structure of the image memory unit 3 in the above embodiment.

In the image memory unit 3, the binary image is written from the external I / F processing unit 4 and the image processing unit 170 to the page memory 301 composed of a memory such as DRAM via the memory controller 302. , The image is read out to the external I / F processing unit 4 and the printer unit 2, and the image is input / output to / from the HD (hard disk) 304 which is a large-capacity storage device.

The memory controller 302 generates a DRAM refresh signal for the page memory 301, and
Access is arbitrated from the external I / F processing unit 4, the image processing unit 170, and the HD (hard disk) 304 to the page memory 301.

Further, according to the instruction of the CPU 171, the write address to the page memory 301, the page memory 3
The read address from 01, the read direction, etc. are controlled. As a result, the CPU 171 causes the page memory 30
A plurality of original images are laid out side by side on one and output, and the function of outputting to the printer unit 2, the function of cutting out and outputting only a part of the image, and the image rotating function are controlled.

Next, the configuration of the external I / F processing unit 4 in the above embodiment will be described.

FIG. 6 is a block diagram mainly showing the configuration of the external I / F processing unit 4 in the above embodiment.

As described above, the external I / F processing unit 4 fetches the binary image data of the reader unit 1 into the external I / F processing unit 4 via the image memory unit 3 and also the image memory unit. From the external I / F processing unit 4 to the printer unit 2 via
The binary image data is output to and an image is formed.

The external I / F processing section 4 includes a core section 406, a facsimile section 401, a hard disk 402 for storing communication image data of the facsimile section, an external computer 1.
A computer interface unit 403 connected to
It has a formatter unit 404 and an image memory unit 405.

The facsimile section 401 is connected to a public line via a modem (not shown), receives facsimile communication data from this public line, and transmits the facsimile communication data to the public line. In the facsimile unit 401,
You can send at a specified time that is a facsimile function,
Images for facsimile, such as sending image data in response to an inquiry using the specified password by the other party,
It is stored in the hard disk 402 and processed.

As a result, after the image is once transferred from the reader unit 1 to the facsimile unit 401 and the facsimile hard disk 402 via the image memory unit 3, the reader unit 1 and the image memory unit 3 are facsimiled. Facsimile transmission can be performed without using it as a function.

The computer interface section 403 is
An interface unit for performing data communication with the external computer 11, which has a LAN (Local Area Network), a serial I / F, a SCSI I / F, a Centro I / F for data input of a printer, and the like. This I / F
The external computer 11 is informed of the states of the printer unit 2 and the reader unit 1 via the external computer 1 or the image read by the reader unit 1 is read by the external computer 1 according to an instruction from the computer.
1 and also receives print image data from the external computer 11.

Since the print data notified from the external computer 11 via the computer interface section 403 is described by a dedicated printer code,
The formatter unit 404 converts the dedicated printer code into raster image data for forming an image in the printer unit 2 via the image memory unit 3.

The formatter unit 404 expands the raster image data in the image memory unit 405. The image memory unit 405 is used as a memory for the raster image data to be expanded by the formatter unit 404, as described above, or the computer interface unit 4 is used.
Image of the reader unit 1 via the external computer 1
1 (image scanner function), the image memory unit 3
It is also used when the image data sent from the computer is expanded once in the image memory unit 405, converted into the format of the data sent to the external computer 11, and the data is sent from the computer interface unit 403.

The core unit 406 is a facsimile unit 401,
It controls and manages each data transfer among the computer interface unit 403, the formatter unit 404, the image memory unit 405, and the image memory unit 3. As a result, even if the external I / F processing unit 4 has a plurality of image output units or only one image transfer path to the image memory unit 3, exclusion is performed under the management of the core unit 406. The image is output by control and priority control.

Next, the operation of the automatic document feeder 6 in the above embodiment will be described.

FIG. 7 is a schematic sectional view showing the structure of the automatic document feeder 6 in the above embodiment.

First, each part of the automatic document feeder 6 will be described with reference to FIG.

The paper feed roller 601 drops onto the paper surface of the original bundle 621 placed on the original tray 620 on which the original bundle 621 formed of at least one sheet material is placed, and rotates to cause the original bundle 621 to rotate. The document D on the uppermost surface of the sheet 621 is fed. Note that reference numeral D1 is a reference numeral indicating the edge of the front (front) surface of the original D, and reference numeral D2 is a reference indicating the rear end of the original D.

The stopper 611 is provided before the start of document feeding.
As shown in FIG. 7A, the original stack 621 is restricted by the stopper 611 and cannot advance downstream. The document fed by the paper feed roller 601 is separated into one sheet by the action of the separation roller 602 and the separation belt 603. This separation is realized by the well-known retard separation technique.

The conveying roller 604 conveys the document separated by the separation roller 602 and the separation belt 603 to the registration roller 605. The document is abutted against the registration rollers 605 to form a loop, thereby eliminating the skew in the document transportation.

A reversal paper feed flapper 613 for guiding the original passing through the registration roller 605 to the paper feed path 652 which is a conveyance path toward the platen 201 or the reversal entrance path 653 is arranged below the registration roller 605. ing.

The first reversing roller 614 and the second reversing roller 615 both rotate when reversing the original.
The reversing flapper 612 allows the reversing path 650 or the re-feeding path 6 to pass the document coming from the direction of the second reversing roller 615.
Guide to 51.

The belt driving roller 606 drives the feeding belt 607 for placing the original on the platen 201. The feeding belt 607 is in contact with the platen 201. The paper feeding and discharging roller 617 discharges the document fed and discharged from the manual sheet feeding port 622 and the document fed by the feeding belt 607 to the document discharging port 623. The paper discharge flapper 616 guides the document to the manual paper feed / discharge path 654 or the document discharge path 655. Paper ejection flapper 616
Serves to prevent the document from being discharged toward the manual sheet discharge port 622 when the document is discharged. Manual paper feed and discharge roller 619
Feeds and ejects manually fed documents. The discharge roller 618 is
Eject the original. Further, three sensors 608, 609, 610 are arranged below the document tray 620.

The document set detection sensor 610 is used for the document stack 6
21 is a document set detection sensor that detects that 21 is set and forms a transmissive optical sensor. The document trailing edge detection sensor 608 is a document trailing edge detection sensor that forms a reflection type optical sensor for determining whether the document is a half size document.

The final document detection sensor 609 is a reflection type optical sensor which is provided between the document set detection sensor 610 and the document trailing edge detection sensor 608 and determines whether or not the document being conveyed is the final document. This is the final document detection sensor to be formed. Further, the document size detection sensors 624, 625, 6
Reference numeral 26 denotes an original size detection sensor that detects the size of the original being conveyed, and three sensors are arranged side by side in the width direction of the original.
The document width is detected in three stages by the three sensor values, and the document width between A system and B system or the document width between A4 and A5 is determined. Further, the document length is detected based on the document passage time. As a result, it is possible to detect individual document sizes even in a document bundle in which documents of different sizes are mixed. However, at this time, the document stack is placed with the rear side in the document width direction aligned.

Next, the operation of the automatic document feeder 6 at the time of reading both sides of a document printed on both sides (double-sided document) in the above embodiment will be described.

When the automatic document feeder 6 is instructed to start the operation for feeding a double-sided document, as shown in FIG. 7B, the stopper 611 is lowered and the paper feed roller 6 is moved.
01 drops onto the upper surface of the document.

By the actions of the paper feed roller 601, the separation roller 602, the separation belt 603, and the conveyance roller 604, only one original is separated from the uppermost surface of the original bundle 621, and as shown in FIG. Delivered up to 605. At this time, the reverse paper feed flapper 613 is set in the direction in which the original is conveyed to the reverse path.

FIG. 8 is a diagram for explaining the operation of the automatic document feeder 6 when reading both sides of a document printed on both sides (double-sided document) in the above embodiment.

When the registration rollers 605 rotate, the document is conveyed to the position shown in FIG. 8E via the path shown in FIG. 7D. From here, the first reversing roller 614
The driving direction of the second reversing roller 615 is reversed, and the document is fed to the platen 201 and stopped at the position shown in FIG.

When the reading of the original is completed, FIG.
As shown in FIG. 8A, the document is turned upside down via the re-feeding path 651, and as shown in FIG.
Will be fed again.

When the reading of the original is completed, the original is fed to the right and discharged from the automatic document feeder 6 through the original discharge port 623.

By repeating the above operation, it is possible to separate the double-sided originals one by one from the uppermost side, read both sides, and discharge the sheet with the upper side facing down (face down).

Next, with respect to the operation of the original reading method (flow reading) in which the scanner 202 is fixed at a predetermined position, the original is moved, and the image is read, the original is of a small size and the original is of a large size. The description will be divided into cases where it is included.

In the above embodiment, the small size is the size of the original document which the original document trailing edge detection sensor 608 does not detect when the original document stack 621 is placed on the original document tray 620.

First, the case where the original of only the small size is read in the flow direction will be described.

FIG. 9 is a diagram for explaining the operation of the original reading system (flow-reading) in which the scanner 202 is fixed at a predetermined position, the original is moved, and the image is read. When the original is only a small size. It is a figure explaining about.

The operation until the document reaches the registration roller 605 is as described with reference to FIGS. 7 (a) to 7 (c). In the case of the flow-reading, as shown in FIG. 9 (i), the reverse paper feed flapper 613 further scans the original on the platen 20.
Lead up one. The document is conveyed at a predetermined speed on the point A in the figure, and the image of the document is read by the scanner 202 waiting below the point A as shown in FIG. 9 (j).

Point A is defined as the position where the trailing edge of the small size original has passed the registration roller 605. The original document is conveyed as it is to the right in FIG.
As shown in, the document is discharged from the document discharge port 623 to the outside of the automatic document feeder 6.

Next, the non-stop scanning of a document including a large size document will be described.

FIG. 10 is an operation explanatory diagram of a document reading system (flow reading) in which the scanner 202 is fixed at a predetermined position, the document is moved, and the image is read. The document includes a small size and a large size. It is a figure explaining the case where it is.

The large size means that when the document stack 621 is placed on the document tray 620, the document trailing edge detection sensor 608.
Is the size of the original that detects the original.

The operation until the original reaches the registration roller 605 is the same as the operation described with reference to FIGS. 7 (a) to 7 (c). In the case of non-stop scanning, FIG.
As shown in (l), the reverse paper feed flapper 613 guides the document onto the platen 201. The original is conveyed at a predetermined speed above the point B in FIG. 10, and the image of the original is read by the scanner 202 waiting below the point B.

Point B is defined as the position where the trailing edge of the large-sized original has passed the registration roller 605. The original document is conveyed as it is in the right direction in FIG. 10, and is ejected out of the automatic document feeder 6 through the original document ejection port 623 as shown in FIG.

FIG. 11 shows the correspondence between the orientation of the original bundle 621 set on the original tray 620 of the automatic original feeder 6 and the orientation of the original bundle 621 that has been conveyed and discharged to the original discharge port 622. It is a figure.

The document shown on the left side of FIG. 11 is the document stack 621 set on the document tray 620. Since the document with the number 1 on the uppermost surface of the document is conveyed in order and the front and back are reversed and output, as shown in the right side of FIG.
The top document is turned upside down and the bottom face is ejected.

Next, the tab sheet insert mode using the tab sheet and the setting in the operation unit when executing the tab sheet creating mode will be described.

FIG. 12 and FIG. 13 show the above-mentioned embodiment.
6 is a diagram showing a liquid crystal screen provided on an operation unit 172. FIG.

FIG. 12A is a standard screen for making basic settings for the copy function. Advanced mode icon 1201
When is pressed, a sub-window for setting various modes opens. When the paper feed stage selection icon 1202 is pressed,
A sub-window for selecting a paper feed tray as shown in FIG. 12B opens, and the paper feed tray can be displayed and selected. The trial copy icon 1203 is used for trial copying only the first copy and outputting a sample when there are a plurality of copies.

The key group 1204 for determining the image mode is
When you select an image mode such as "Auto Density Correction", "Text Mode", "Text Photo Mode", "Photo Mode", etc., and when "Text Mode", "Text Photo Mode" or "Photo Mode" is selected , "Light", "Koku" keys,
The concentration can be changed.

Key group 1205 for changing the magnification of the original
Includes 100% “actual size”, “reduction”, “enlargement”, “zoom” in 1% increments, and “slightly smaller” keys used when copying the entire document. In either case,
The magnification of the original is changed, and after the magnification is set, the set magnification is displayed.

A "sorter" key 1206 sets finishing after the paper is output. For example, a sort mode when changing one copy of a plurality of originals to a multiple copy output, a group sort in which one page of each original is output by the set number of copies, and one copy of paper output in the sort mode A staple mode and the like, in which staples are collectively performed for each, are included.

A "double-sided" key 1207 sets a double-sided mode of reading or outputting one side of a document or paper.
Single-sided mode that scans the original on one side and outputs on both sides of the paper, double-sided mode that reads the original on both sides and outputs on both sides on the paper, double-sided mode that reads the original on both sides and outputs on the single side on the paper, A page continuous copying both-side mode in which one side is divided into two and read and output on both sides of the paper is included.

FIG. 12A shows a display example in which the single-sided mode in the double-sided mode is set, and a single-sided balloon is displayed above the double-sided icon.

A favorite function key 1208 that allows an arbitrary function to be used like a shortcut is displayed as a favorite key in FIG. 12 when the one-sided copy is performed. When pressed, the mode setting for the one-sided copy is performed. To be done.

FIG. 12B is a diagram showing a sub-window displayed when the “paper selection” key 1202 shown in FIG.
Right cassette deck 221, left cassette deck 222,
The paper feed stage to be selected is set from among the paper feed stages of the upper cassette 223 or the lower cassette 224, the deck 250, and the multi-manual feed 254.

At this time, the icon 1211 indicates the multi-manual feed 254, the icon 1212 indicates the right cassette deck 221, and A4 paper is currently inserted.
The icon 1213 indicates the left cassette deck 222,
Currently, A5 paper is inserted. The icon 1214 is
The tab paper feed tray set as the tab paper feed tray in the upper cassette 223 is displayed.

Presently, it indicates that an A4 size tab sheet is inserted, and by this, the user can recognize where the tab sheet is set or where it is set.

The icon 1215 indicates the lower cassette 224.
Indicates that there is currently no A3-size paper set, but there is no paper. The icon 1216 is on the deck 250,
This indicates that A4 paper is currently inserted. An icon 1217 is an automatic paper selection key. When the automatic paper selection is selected, the optimum paper is automatically detected from the original size and the set copy mode, and if not found, the second candidate paper size is selected. select.

FIG. 12C shows an application mode key 1201.
It is a figure which shows the subwindow which appears when is pressed, and the icons of the functions for setting each copy mode are displayed.

A "page continuous shooting" key 1221 is a key for executing a mode in which the document is regarded as a spread and divided into two and read as two documents.

The "Cover / Slip Sheet" key 1222 is used to select the output sheet, which is the front cover, the back cover, or a slip sheet for partitioning, and
This is a key to execute a mode for outputting a copy of a copy.

The "bookbinding mode" key 1223 is a key for executing a mode in which when a document is copied, it is folded in the center of the output sheet and is output like a spread book.

A "negative / positive inversion" key 1224 is a key for executing a mode for copying a white portion of a document image to black and a black portion to white.

The mode memory key 1225 is used for the application mode, the sort mode set in the key 1206, and the key 12
This is a key for collectively storing various mode settings such as the variable magnification mode set in 05 and the image mode set in the key 1204.

The "OHP middle insertion" key 1226 is used when OHP paper is set by multi-manual feeding 254 or the like.
OHP medium feed paper that feeds and prints OHP from multi-manual feed 254, prints the same image on normal paper from other paper feed stages, and outputs without printing This is a key to set the mode inserted between.

The "mixed originals" key 1227 is a key for executing a mode set when a plurality of originals are placed on the automatic original feeder 6 and A4 and A3 are mixed.

The "image composition" key 1228 is a key for registering a background image or for superimposing a previously registered background image on a document and outputting it.

The "tab paper insert" key 1229 is used when the tab paper feed stage is provided, as in the upper cassette 1214 shown in FIG. It is a key for executing a tab sheet insert mode in which an image is moved to print on a tab of a copy document corresponding to the tab portion.

The "tab paper creation" key 1230 is shown in FIG.
When there is a tab sheet feeding stage like the upper cassette 1214 shown in (b), the tab sheet is fed, and the image corresponding to the tab portion printed on the original is moved to the tab position and the tab sheet is fed. This key executes the mode to print on the tab part of.

A "call" key 1231 is a key for executing a mode for recalling the settings at the previous copying. A “move” key 1232 is a key for executing a mode for setting how to move a document image output sheet.

A "binding margin" key 1233 is a key for executing a mode in which an image is moved to form a binding margin on a sheet for outputting a document image.

A "frame erase" key 1234 is a key for executing a mode of erasing the outer frame of the original image or erasing the image of the outer frame of the paper at the time of printing.

The "reduced layout" key 1235 is used for laying out and printing a plurality of originals on one sheet.
It is a key to execute the mode to be set.

The "enlargement layout" key 1236 is a key for executing a mode for dividing and printing a plurality of images per sheet created by a reduction layout or the like.

The 1237 key is a key for closing the sub window of the application mode and returning to the standard surface of FIG.

The "tab document" key 1238 is used to read the document when part or all of the read document is a tab sheet, and when the tab sheet feed stage is present as in the upper cassette 1214 in FIG. In the case of paper, the mode is such that the tab sheet is fed, the image printed on the tab portion of the document is moved to the tab position of the fed tab sheet, the magnification is changed, and the tab portion of the tab sheet is printed.

FIG. 13D shows a tab sheet insert key 1
229 is a diagram showing a sub-window opened when the tab sheet creation key 1230 is pressed, and the number of tab divisions is input.

In general, five tab sheets, each of which is composed of five tab sheets, are used. In the above-described embodiment, two tab sheets of which one set is composed of two tab sheets are divided into 12 tab sheets. 1 set that consists of a sheet of tab paper
It is possible to make settings so that 2 tab sheets can be handled.

Here, the "tab division number" is the number of tab sheets included in one set. The area 1301 indicates the number of tab divisions currently set, and the "minus" key 1302 and the "plus" key 1303
It is possible to increase or decrease the number of tab divisions.

An "OK" key 1304 is a key for setting the input tab division number. "Cancel" key 1305
Is a key to be pressed when returning to the sub window of the application mode from the sub window for inputting the tab division number without setting the tab division number.

FIG. 13 (e) is the same as FIG. 13 (d).
FIG. 11 is a diagram showing a sub-window for setting the amount of tab image movement after the “OK” key 1304 is pressed. That is, it is the amount of movement for moving the tab image in order to print the image printed on the tab portion included in the document on the tab portion.

Normally, 12 mm for A4 size tab paper.
Although it is sufficient to move the tab image, the amount of movement changes depending on the size of the characters printed on the tab and the position on the document in the above embodiment. It can be set so that the image can be moved.

The "minus" key 1311 is a key for reducing the normal movement amount of the tab image, which is 12, and the "plus" key 1312 is a normal movement amount of the tab image, which is 1.
The key to increase 2.

The display portion 1313 is a portion for displaying the amount of movement currently set. "Cancel" key 1
A key 314 is a key for canceling the setting of the movement amount and returning to the input screen (FIG. 13D) for setting the tab division number.
The “OK” key 1315 is a key for reflecting the value displayed on the display unit 1313 at the time of printing.

Next, as shown in FIG. 13 (f), the number of pages at which the tab sheet is inserted (tab sheet insertion page) is set.

When selecting the first tab sheet, the insertion page window 1321 representing the page to be inserted is depressed by pressing the first tab sheet and a ten-key pad (not shown) on the operation unit.
Enter the number of pages on which you want to insert the tab paper.

In the above embodiment, as shown in FIG. 13F, the insertion position of the first tab sheet is set before the second page. Similarly, the insertion position of the second tab sheet is set before the third page, the insertion position of the third tab sheet is set before the fourth page, and the insertion position of the fourth tab sheet is set. The insertion position is set before page 5, and the insertion position of the fifth tab sheet is set before page 8.

The "cancel" key 1322 cancels the number of pages as the insertion position for inserting the tab sheet and sets the image movement amount of the tab image (see FIG. 13).
This is a key for returning to (e)).

The scroll up key 1323 is a key for scrolling up the insertion page window 1321 when there are seven or more pages into which tab sheets are inserted.

The scroll down key 1324 is a key for scrolling down the insertion page window 1321 when there are seven or more pages into which tab sheets are inserted.

An "OK" key 1325 is an "OK" key for reflecting the tab sheet insertion page set in the insertion page window in the copy job, whereby the tab sheet insert mode setting is completed.

When set in this way, FIG.
From the tab division number, the tab image movement amount, and the tab sheet insertion page set by (d), (e), and (f), at which position of one sheet bundle the tab sheet is inserted in the copy job, and the tab sheet is inserted. The amount of movement of the image when printing on a set is determined, and on which page the tab sheet should be fed.

FIG. 14 is a diagram showing an example of a document to be copied and an output sheet according to the tab sheet insert setting set in FIG.

FIG. 14A shows an original, and FIG.
(B) shows the output paper. At this time, the document size and the paper size match, but the tab document size and the tab paper size differ only in the tab portion.

The tab original 1401 is an original that is sandwiched between the originals 1402 and is printed (image is formed) on the tab sheet. The output paper output corresponding to this is shown in FIG.
, The image printed on the tab document 1401 is
The tab image is moved by the movement amount set in FIG. 13E and is printed on the tab portion of the tab sheet 1411.

FIGS. 15C and 15D are shown in FIGS.
FIG. 6 is a diagram showing an example of an original document (tab original document) to be copied and a copied output paper sheet (output tab paper sheet) according to the tab sheet creation mode setting set in (e).

FIG. 15C is a diagram showing a tab document, and FIG. 15D is a diagram showing an output tab sheet.

Although the document size and the paper size are the same, the tab document size and the tab paper size are different only in the tab portion. The output papers output corresponding to the different sizes are shown in FIG. 15D, and the image printed on the tab document in FIG. 15C has the movement amount set in FIG. 13E. The tab image moves by the amount and is printed on the tab portion of the tab sheet.

Next, the setting in the operation unit when the tab sheet document mode for copying a document bundle including tab sheets is executed will be described.

FIG. 16 is a display diagram of a liquid crystal screen on the operation unit 172.

FIG. 16A shows a sub-window opened when the tab document key 1238 is pressed.

In this sub-window, the tab division number of the tab sheet included in the tab original is input. Area 16
The number 01 indicates the number of tab document divisions that are currently set, and can be increased or decreased by the "minus" key 1602 and the "plus" key 1603.

The "cancel" key 1604 is pressed without returning from the sub window for inputting the tab division number of this tab document to return to the sub window of the application mode. The “OK” key 1605 can reflect the setting of the division number of the input tab sheet document.

FIG. 16 (b) is the same as FIG. 16 (a).
It is a figure which shows the subwindow which comes out after the "OK" key 1605 is pressed.

Enter the tab division number of the tab sheet bundle set in the sheet cassette. In the area 1611, the number of divisions of the tab sheet bundle of the sheet cassette currently set is shown, and the "minus" key 1612 and the "plus" key 16
It is possible to increase or decrease by 13.

The "cancel" key 1614 is used to input the tab division number of the tab sheet included in the tab sheet original from the sub window for inputting the tab division number of the tab sheet bundle of this paper cassette without setting. This key is pressed when returning to the sub window.

The "OK" key 1615 is a key that can reflect the setting of the division number of the input tab document.

FIG. 17 is a diagram showing an example of an original and an output paper to be copied in the tab original mode set in FIG.

FIG. 17 (a) is a diagram showing a document, and FIG. 17 (b) is a diagram showing output paper.

At this time, although the document size and the paper size are the same, the position and size of the tab part of the tab document and the tab part of the tab paper to be output are different.

When the image data obtained by reading the tab portion of the tab original is moved, scaled, and printed on the tab portion of the output paper, the image shown in FIG.
The output sheet is shown in 7 (b). In the output paper shown in FIG. 17B, the tab original is composed of only tab paper. However, as shown in FIG. 14B, even in the original bundle in which tab paper and plain paper are mixed, the original is tabbed. This can be realized by performing the same processing as described above on paper.

Next, an example of control when the tab original mode is executed in the image forming apparatus will be described.

FIG. 18 is a flowchart showing the control operation when the tab original mode is executed in the image forming apparatus.

When the tab original mode is set and the paper corresponding to each original is printed, the operation is started. First, in step S101, it is determined whether or not the document is a tab sheet, that is, whether or not the output sheet is a tab sheet.

If the paper to be output is a tab paper, the process proceeds to step S102, and it is determined whether the tab division number of the document is the same as the tab division number of the output sheet. If they are the same, the process proceeds to step S105, the tab sheet is directly printed, and then the process proceeds to step S107.

In step S102, if the tab division number of the original is not the same as the tab division number of the output paper,
In step S103, the print position is corrected. Succeedingly, in a step S104, since the tab portion has a different size, the printing magnification is corrected.

Next, the process proceeds to step S105, the tab sheet to be output is printed at the corrected position, and then the process proceeds to step S107.

On the other hand, if the paper output in step S101 is plain paper, the process proceeds to step S106, after printing on the plain paper, the process proceeds to step S107. In step S107, it is determined whether or not the output sheet is the final sheet, and if it is not the final sheet, the process returns to step S101, and thereafter, the processes of steps S101 to S107 are repeated. If it is determined in step S107 that the sheet is the last sheet, the process ends.

By controlling as described above, printing is performed on plain paper or tab paper corresponding to each original, and when it is tab paper, the print position and size of the tab portion are also corrected. You can

The above is an example of control when the tab original mode is performed.

Further, in the above embodiment, the document size detecting sensors 624, 625, 626 are sensors for detecting the size of the document being conveyed. By arranging a plurality of these sensors side by side in the width direction of the document, The document width can be accurately detected, and the document length in each sensor unit can be detected based on the document passage time.

By this, not only the size of the original but
The position and size of the tab portion can be detected, and the tab original mode can be realized without performing the operation of inputting the tab division number of the tab sheets forming the original bundle.

That is, in the above-described embodiment, the tab-free paper accommodating means for accommodating the tab-free recording paper, which is a recording paper without tabs, and the tab position of the tab paper in the tab paper bundle constituted by a plurality of tab papers are arranged. A tab sheet storage means for storing a tab sheet bundle that is sequentially displaced, a tab sheet number storage means for storing the number of tab sheets included in one tab sheet bundle, the tabless sheet storage means or the tab. Paper feeding means for feeding paper from the paper storing means, image forming means for forming an image on the fed paper, and designated image data for forming an image on the tabless paper or the tab paper. An output sheet bundle creating means for executing a tab insert mode for producing one output sheet bundle, a tab original sheet number setting means for setting the number of tab originals included in the original bundle, and image data of the tab original Read The tab original read by the tab original reading unit when the tab original reading unit and the number of tab originals set by the tab original number setting unit are different from the number of tab sheets stored in the storage unit 2 is an example of an image forming apparatus having a tab image position correction unit that corrects the position of the image data.

Further, in the above-described embodiment, the tab-free paper accommodating means for accommodating the tab-free recording paper having no tab and the tab position of the tab paper in the tab paper bundle constituted by a plurality of tab papers are arranged. A tab sheet storage means for storing a tab sheet bundle that is sequentially displaced, a tab sheet number storage means for storing the number of tab sheets included in one tab sheet bundle, the tabless sheet storage means or the tab. Paper feeding means for feeding paper from the paper storing means, image forming means for forming an image on the fed paper, and designated image data for forming an image on the tabless paper or the tab paper. An output sheet bundle creating means for executing a tab insert mode for producing one output sheet bundle, an original document conveying device for conveying an original sheet bundle containing a tab original document onto a platen, and a tab position in the tab original document. Do The manuscript tab position detecting means, the manuscript reading means for reading the image data of the manuscript conveyed by the manuscript conveying device, the tab position detected by the manuscript tab position detecting means, and the tab paper stored in the storing means. This is an example of an image forming apparatus having tab image correction means for correcting the image data of the tab original read by the original reading means when the tab position based on the number of sheets is different.

In the above case, the tab image position correcting means is means for moving the image data of the tab original,
It is also a means for scaling the image data of the tab document.

Further, the tab image correction means is a means for moving the image data of the tab document and a means for scaling the image data of the tab document.

[0178]

According to the present invention, when a document bundle including tab sheets is duplicated, the number of tab divisions of the tab sheet included in the document bundle and the tab of the tab sheet bundle set in the paper cassette are set. Even if the number of divisions is different, it is possible to accurately print at the tab position and prevent the device from being soiled.

[Brief description of drawings]

FIG. 1 is a digital copying machine DC1 according to an embodiment of the present invention.
It is a block diagram showing.

FIG. 2 is a vertical sectional side view showing the configuration of a digital copying machine DC1.

FIG. 3 is a block diagram showing a control system of a digital copying machine DC1.

FIG. 4 is a block diagram mainly showing a configuration of an image processing unit 170 in the above embodiment.

FIG. 5 is a block diagram mainly showing a detailed configuration of an image memory unit 3 in the above embodiment.

FIG. 6 is a block diagram mainly showing a configuration of an external I / F processing unit 4 in the above embodiment.

FIG. 7 is a schematic sectional view showing a configuration of an automatic document feeder 6 in the above embodiment.

8A and 8B are both sides of a document printed on both sides (double-sided document) in the above embodiment.

FIG. 9 is a document reading method in which a scanner 202 is fixed at a predetermined position, a document is moved, and an image is read (flow scanning)
FIG. 6 is a diagram for explaining the operation of the above, and is a diagram for explaining the case where the original is only a small size.

FIG. 10 is an operation explanatory diagram of a document reading method (flow scanning) in which a scanner 202 is fixed at a predetermined position, a document is moved, and an image is read, and the document includes a small size and a large size. It is a figure explaining a case.

11 is a diagram showing the correspondence between the orientation of a bundle of documents 621 set on a document tray 620 of the automatic document feeder 6 and the direction of a bundle of documents 621 conveyed and discharged to a document discharge port 622. FIG. .

FIG. 12 is a diagram showing a liquid crystal screen provided on an operation unit 172 in the above embodiment.

FIG. 13 is a diagram showing a liquid crystal screen provided on an operation unit 172 in the above embodiment.

FIG. 14 is a diagram showing an example of an original document to be copied and an output sheet according to the tab sheet insert setting set in FIG.

FIG. 15 is a diagram showing an example of an original document to be copied (tab original document) and a copied output paper sheet (output tab paper sheet) according to the tab sheet creation mode setting set in FIG. 13;

FIG. 16 is a display diagram of a liquid crystal screen on the operation unit 172 in the above embodiment.

FIG. 17 is a diagram showing an example of a document and output paper to be copied in the tab document mode set in FIG.

FIG. 18 is a flowchart showing a control operation in the above embodiment.

[Explanation of symbols]

DC1 ... Digital copier, 1 ... Leader part, 2 ... Printer section 3 ... memory part, 4 ... External I / F processing unit, 6 ... Automatic document feeder, 200 ... Digital copier body, 202 ... Scanner, 620 ... Original tray, 1042 ... manuscript, 1401 ... Tab document, 1411 ... Tab paper.

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) G03G 21/00 378 G03G 21/00 380 5C076 380 H04N 1/387 H04N 1/387 1/393 1/393 G03G 21/00 382 (72) Nobuo Sekiguchi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Tadaaki Saita 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Hidenori Sunada 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Yoshito Nagato 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. F-term (reference) 2C087 AA03 AA09 AA16 AA18 AC08 BB10 BD06 BD07 BD40 CA03 CA05 CB12 DA14 DA18 2H027 DB01 DB02 DC19 ED17 FA27 FA30 FB05 FD01 2H076 BA14 BB07 BB10 3F107 AA01 AB22 AB02 AB30 AB22 AB30 AB10 AB22 AB10 AB42 AB30 AB10 AB42

Claims (6)

[Claims] 1. A tabless storage means for storing tabless recording paper, which is a recording paper without tabs; tabs in which tab positions of tab sheets in a tab sheet bundle composed of a plurality of tab sheets are sequentially displaced. Tab paper storage means for storing a bundle of paper; 1
A tab sheet number storage means for storing the number of tab sheets included in one of the tab sheet bundles; a sheet feeding means for feeding sheets from the tabless sheet storage means or the tab sheet storage means;
Image forming means for forming an image on the fed sheet;
Output sheet bundle creating means for forming an image of the designated image data on the tabless sheet or the tab sheet and executing a tab insert mode for producing one output sheet bundle; tab originals included in the original bundle A tab original number setting means for setting the number of tab originals; a tab original reading means for reading image data of the tab original; a tab original number set by the tab original number setting means; and a tab original number stored in the storage means. An image forming apparatus comprising: a tab image position correcting unit that corrects the position of the image data of the tab document read by the tab document reading unit when the number of tab sheets is different. 2. The image forming apparatus according to claim 1, wherein the tab image position correcting means is means for moving the image data of the tab document. 3. The image forming apparatus according to claim 1, wherein the tab image position correcting unit is a unit that magnifies image data of the tab document. 4. A tabless sheet storage means for storing tabless recording paper, which is a recording sheet having no tab, and tabs in which tab positions of tab sheets in a tab sheet bundle formed by a plurality of tab sheets are sequentially displaced. Tab paper storage means for storing a bundle of paper; 1
A tab sheet number storage means for storing the number of tab sheets included in one of the tab sheet bundles; a sheet feeding means for feeding sheets from the tabless sheet storage means or the tab sheet storage means;
Image forming means for forming an image on the fed sheet;
An output sheet bundle creating means for executing a tab insert mode for forming an image of the specified image data on the tabless sheet or the tab sheet and producing one output sheet bundle; and an original sheet bundle including tab originals. An original document conveying device for conveying the document onto the platen; an original document tab position detecting means for detecting a tab position in the tab original document; an original document reading device for reading image data of the original document conveyed by the original document conveying device; When the tab position detected by the detection unit is different from the tab position based on the number of tab sheets stored in the storage unit, the tab image correction unit that corrects the image data of the tab document read by the document reading unit And an image forming apparatus. 5. The image forming apparatus according to claim 4, wherein the tab image correction means is means for moving the image data of the tab document. 6. The image forming apparatus according to claim 4, wherein the tab image correction unit is a unit that magnifies image data of the tab document.