JPH0497369A - Image forming device - Google Patents

Abstract

PURPOSE:To output a recording medium as a front page to a paper ejecting port when a specific document is detected, regardless of the setting of various kinds of copying modes by detecting a colored document set to the document fed from an automatic document feeding means and automatically inserting the recording medium as the front page. CONSTITUTION:When a detecting means (for instance, an image processing part 402) detects the color information of the document fed by an automatic document feeder 51, during the setting of each copying mode by a mode setting means (the setting key for various kinds of modes of an operating part 41), a controller 42 selects a prescribed paper feeding port feeding the recording medium, and a carrying control means (by allowing the controller 42 to control a motor control part 48, a high voltage unit HTV, etc.) controls the carrying of the recording medium fed from the selected paper feeding port. Priority paper ejecting is carried out on the rarer ejecting port in a state where an image is not. Thus, the recording medium as the front page can be outputted to a paper ejecting tray when the specific document is detected, regardless of the setting of various kinds of the copying modes.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image forming apparatus capable of forming an image of a document fed from an automatic document feeding means on one or both sides of a recording medium fed thereto. It is something.

[Prior Art] Conventionally, when performing continuous copy processing, this type of device has been able to identify each page break with different content (for example, in units of jobs) and automatically insert a cover page for output. It is composed of

In this case, immediately before starting continuous copying, the operator inputs the number of sheets into which the cover page is to be inserted as numerical data from the operation unit.

Then, an image forming sequence is executed in which the number of output sheets is sequentially counted, and when a designated page number is reached, the cover page is automatically inserted.

[Problems to be Solved by the Invention] However, the above-mentioned cover page insertion process always requires the operator to perform a complicated operation of counting the number of pages indicating how many pages of the document to be continuously copied to create a cover page. .

Additionally, if the number of pages increases excessively, errors may occur in the process of counting the number of original pages, incorrect display pages may be specified, a display page may be inserted at an unexpected page, and a cover may be inserted at a page other than the original page. However, there were problems such as the management after output becoming rather complicated.

This invention was made to solve the above-mentioned problems, and anyone can use it by detecting a colored original set in the original fed by an automatic original feeding means and automatically inserting a cover page. It is an object of the present invention to provide an image forming apparatus capable of obtaining an output in which an identifiable cover page is inserted at a desired document position with a simple operation.

[Means for Solving the Problems] An image forming apparatus according to the present invention includes a detection method that detects color information of a document fed by an automatic document feeding device during each copy mode setting set by a mode setting device. a selection means for selecting a predetermined paper feed port for feeding the recording medium based on a result of detecting color information on the document by the detection means; and a paper feed port selected by the selection device. The apparatus is provided with a conveyance control means that controls the conveyance of the recording medium and preferentially discharges the paper to the paper discharge port in a non-image forming state.

It also includes a measuring means for measuring the number of originals inserted between specific originals fed from the automatic document feeding means, and a double-sided image of the recording medium fed based on the total number of originals measured by the measuring means. The image forming apparatus is provided with a setting means for setting the image forming start reference surface during the forming process to give priority to the surface.

[Operation] In the present invention, when the detection means detects color information of the original fed from the automatic document feeding means during each copy mode setting set by the mode setting means, the selection means selects the recording medium. selects a predetermined paper feed port for feeding the paper, and the transport control means controls the transport of the recording medium fed from the selected paper feed port to preferentially eject the recording medium to the paper discharge port in a non-image forming state;
To make it possible to output a recording medium that becomes a cover page when a specific document is detected, regardless of various copy mode settings.

Further, the number of originals existing between specific originals fed by the automatic original feeding means is measured by the measuring means, and the setting means forms a double-sided image of the fed recording medium based on the total number of the measured originals. The image formation start reference plane during processing is set to give priority to the front surface, and only the recording medium fed for a specific document can be ejected as a blank page serving as a cover page.

[Embodiment] FIG. 1 is a cross-sectional configuration diagram illustrating the configuration of an image forming apparatus showing an embodiment of the present invention, in which 1 is a main body of the image forming apparatus, document scanning section 2. Paper feeding section 3, image forming section 4. It consists of an intermediate tray part 5, etc.

First, the configuration of the document scanning section 2 will be explained.

Reference numeral 2a denotes a controller section, which is composed of a control board in which control elements for comprehensively controlling the image forming sequence are integrated. Note that the controller section 2a is equipped with hardware that functions as a transport control means and a setting means.

In the image forming apparatus configured as described above, during each copy mode setting set by the mode setting means (various mode setting keys of the operation section 41), the detection means (image processing section 4o2 in this embodiment) automatically detects the original document. When the color information of the document fed by the feeding means (automatic document feeding snowmaking 51) is detected, the selection means (controller 42 in this embodiment)
selects a predetermined paper feed port for feeding the recording medium, and the conveyance control means (in this embodiment, the controller 42 controls the motor control unit 48, high voltage unit HTV, etc.) from the selected paper feed port. The conveyance of the fed recording medium is controlled so that it is preferentially ejected to the paper ejection port in a non-image forming state, and the recording medium that will become the cover page is transferred to the paper ejection tray 24 when a specific document is detected, regardless of various copy mode settings. It is possible to output to

Further, the number of originals existing between specific originals fed by the automatic original feeding device 51 is measured by a measuring means (feeder control unit 50).
a), and the setting means sets the image formation start reference surface for the double-sided image forming process of the fed recording medium to front side priority based on the total value of the document to be measured, and This makes it possible to eject only the recording medium fed as a white background.

2b is a power switch, and 2C is an original exposure lamp, which together with a scanning mirror constitutes an optical scanning system, which scans and moves at a predetermined speed.

Reference numeral 2d denotes an imaging lens that forms an image of reflected light from the original onto the photosensitive drum 11 of the image forming section 4.

Reference numeral 2e denotes a buzzer that notifies a user of an error in an image forming mode set on an operation unit, which will be described later. 2f is an optical system drive motor (optical motor) that drives the optical scanning system etc. with high precision.

A CCD unit 401 is disposed near the imaging lens 2d on the analog optical path, and can read the color information of the original by scanning the original with a scanning mirror.

Next, the paper feed section 3 will be explained.

3a and 3b are paper feed rollers, and these paper feed rollers 3a and 3b
The cut sheet hsH is fed into the image forming section 4 by driving.

Next, the image forming section 4 corresponding to the image forming means of the present invention
The configuration of is explained below.

12 is a registration roller and a paper feed roller 3a.

The cut sheet SH fed by the drive of the drive unit 3b is temporarily stopped, and after the image leading edge alignment is synchronized, the cut sheet SH is fed again.

Reference numerals 13a and 13b designate developing units that contain different color developers (red and black), and selectively move one of the developing units h13a and 13b closer to the photosensitive drum 11 by driving solenoids 14a and 14b. and the other is retracted from the photosensitive drum 11. Note that when the recording mode is set from the operation section described later, the controller section 2a selects the recording material (cut sheet S) for a specific document.
The controller unit 2a controls the driving of the solenoids 14a and 14b so that red/black color development is performed only for H).

15 is a transfer charger and a developing unit 13a.

The toner image developed by 13b is transferred onto the cut sheet SH, and after the transfer, the toner image is transferred to the photosensitive drum 11 by the separation charger 16.
The cut sheet SH is separated from the paper. 17 is a pre-exposure lamp that neutralizes the surface potential of the photosensitive drum 11 and prepares for the next charging. A cleaning device 18 is composed of a cleaning blade and a cleaning roller, and is connected to the photosensitive drum 11.
Collect residual toner.

A fixing device 19 fixes the toner image transferred to the cut sheet SR using heat and pressure. 20 is a conveyance roller;
Reference numeral 1 denotes a flapper which switches the conveying direction of the cut sheet SH after the fixing process is carried out via the paper discharge roller 23 or the conveyance path 22 to the intermediate tray part 5 direction.

24 is a paper discharge tray; 25 is a scanner motor that rotates a rotary polygon mirror at a predetermined speed and deflects a laser beam emitted from a semiconductor laser 26; Note that the scanner motor 2
5. A digital scanning unit includes a semiconductor laser 26 and the like, emits a laser beam according to font information corresponding to the input add-on information, forms a superimposed image on the original image and the add-on information, and also forms an image on the photosensitive drum 11. The latent image area is irradiated with a laser beam to selectively erase the latent image. Alternatively, the latent image is selectively erased by irradiating a laser beam using laser data subjected to image processing based on color information read from the CCD unit 401.

An exposure shutter 27 blocks part or all of the reflected image light to prevent latent image formation. 403 is a red filter for erasing a red image.

28 is a primary charger. Note that 22a is the transport direction, M
M is the main drive motor.

Next, the configuration of the intermediate training part 5 will be explained.

Reference numeral 30 denotes an intermediate tray, which temporarily stores the cut sheets SH conveyed via the conveyance roller 34, and stores the cut sheets SH conveyed via the conveyance roller 34.
The image is retransmitted to the image forming section 4 via the conveyance path 31 by driving. Note that 32 is a flapper, and 36 is a conveyance path.

Note that S1 to S15 in the figure. Sensors S19 to S23 are sensors, and sensor S1 detects the home position of the optical system serving as an analog scanning unit, and the optical system stops at this position during standby. Sensor S2 detects that the optical system has moved to a position corresponding to the leading edge position of the original image, and controls the timing of the copy sequence based on this sensor output. Sensor S3 is at the limiter position (inverted position) during maximum scanning. The optical system reciprocates with a scan length according to the cassette size and magnification specified by an operating section, which will be described later.

FIG. 2 is a block diagram illustrating the configuration of the controller section 2a shown in FIG. 1, and the same parts as in FIG. 1 are given the same reference numerals.

In the figure, reference numeral 41 is the operation unit, which includes copy modes (single-sided, double-sided, multiplex, etc.) and copy modes (magnification, paper size, etc.)
42 is a control unit (controller), C
PU42a, ROM42b, RAM42c
etc., and performs overall control of the image forming sequence based on a control program stored in the ROM 42b.

Reference numeral 43 denotes an editor for inputting area designation for a predetermined area of the document. Reference numeral 44 denotes a shutter section, which is composed of an exposure shutter 27 and a solenoid.

A CCD unit 401 detects color information of a document, performs image processing in an image processing section 402 under instructions from a controller 42, and transmits a signal to a laser section 45.

The laser section 45 includes a semiconductor laser 26. scanner motor 2
Consists of 5th grade. Reference numeral 46 denotes an AC driver that supplies AC power to an AC load 47 such as the original exposure lamp 20. 4
A motor control section 8 controls the drive of the motor section. 49
is a DC load control section that controls the driving of the solenoids 14a, 14b, clutch, fan, and the like.

A feeder control section 50a controls driving of the document feeding section. A sorter 50b discharges cut sheets SH discharged by the drive of the paper discharge roller 23 into a designated paper discharge bin.

HTV is a high-voltage unit that includes a charging system and developing unit 1.
A voltage of a predetermined potential is applied to the developing sleeves 3a and 13b.

DCP is a DC power supply and supplies a control potential +5■ to the controller section 28 and the like.

When the power switch 2b is turned on, first, the heater in the fixing device 19 is energized and waits (wait time) for the fixing roller to reach a predetermined temperature at which fixing can be performed. When the fixing roller reaches a predetermined temperature, the main drive motor MM is driven for a certain period of time, and the photosensitive drum 11. The fixing device 19 and the like are driven to set the rollers in the fixing device 19 at a uniform temperature (weight release rotation). Thereafter, the main drive motor MM is stopped and the copying device is placed on standby (standby state).

Here, the main drive motor MM includes the photosensitive drum 11, the fixing device 19 . The developing units 13a and 13b and various transfer paper conveyance rollers are driven. Then, when a copy command is input from the operation unit 41, an image forming sequence is started.

(1) Explanation of image formation The main drive motor MM rotates in response to a copy command, and the photosensitive drum 11 starts rotating in the direction of the arrow, and high voltage is supplied from the high voltage unit HTV to the - wide charger 28 to uniformly spread it on the photosensitive drum 11. gives an electric charge. Next, the original exposure lamp 2C is turned on, the optical motor 2f is driven, the original placed on the original table is exposed and scanned in the direction of the arrow, and the photosensitive drum 1
Project onto 1. In this way, an electrostatic latent image is formed on the photosensitive drum 11.

Next, this latent image is developed by the developing unit 13a or 13b, transferred to the cut sheet SH at the transfer charger 15, and separated from the photosensitive drum 11 at the separation charger 16.

Next, the toner remaining on the photosensitive drum 11 is collected by the cleaner device 18, and the static electricity is uniformly removed by the pre-exposure lamp 17, after which the copy cycle is repeated again.

At this time, unnecessary charges outside the image area are erased by a laser unit composed of a semiconductor laser 26, a rotating polygon mirror, and the like.

In addition, the laser unit can irradiate a laser beam to any location in the image to erase part of the image, and stamp information (Important, Immediately read once, Copy prohibited, Add-on information input from the operation unit 41) It is possible to irradiate a laser beam according to the color information (e.g. secret) or a laser beam according to the color information provided by the CCD unit 401, and copy the cut sheet SH in an overlapping manner.

The developing units 13a and 13b are brought into contact with one of the photosensitive drums 11 in response to a selection command from the operating section 41.

In this embodiment, the developing unit 13a stores color toner (for example, red toner), and the developing unit 13b stores color toner (for example, red toner).
contains black toner, and the solenoids 14a and 14b
Approaching/retreating from the photosensitive drum 11 is performed by this. Note that a developing bias voltage is applied to the developing sleeves of the developing units 13a and 13b from the high voltage unit HTV.

In addition, the image forming apparatus of this embodiment can perform not only normal one-sided copying but also double-sided copying and multiplex copying.
The cut sheet SH that has passed through the fixing device 19 has different conditions such as the resistance value of the paper compared to when the first side was copied. Also, the first side and both sides or the second side when making multiple copies.
Conditions are different depending on face. Each high voltage value of these developing biases or transfer 5 separations is determined by the high voltage unit H.
Controlled by TV.

The optical system controls the motor control unit 4 according to instructions from the control unit 42.
The reciprocating control is performed by rotating the optical motor 2f forward or reverse via 8.

(2) Control of cut sheet SH Sensor S9 in FIG. Sll detects whether the upper and lower cassettes are out of paper, and sensors 10 and 12 detect the lifting state of paper feed rollers 3a and 3b. Moreover, sensor S22. S23 detects the cassette size.

Hereinafter, since the upper and lower stages perform similar operations, the paper feeding operation for the upper stage will be described.

First, when the upper cassette is inserted, the sensor S22 reads the size and identifies the cassette size, turns off the paper out indicator of the operation section 41, and selectively turns on the cassette size.

Next, when the copy operation starts with the copy command,
Turn on the middle plate lifting clutch (not shown) to raise the middle plate in the cassette and raise the cassette sheet SH. As a result, the cut sheet SH rises, and the paper feed roller 3a
When it comes into contact with and reaches a predetermined height, the sensor SIO outputs an output, turns off the clutch, and drives the paper feed roller 3a to feed the cut sheet SH into the machine.

As described above, the cassette sheet SH in the cassette is raised by the middle plate raising clutch, and thereafter held at the raised position, and does not perform the raising operation at the next copy start.

Also, during continuous copying, the cut sheet S in the cassette
When H decreases and the upper surface of the cut sheet SH falls below a predetermined position, the clutch is similarly turned on and the cut sheet SH is raised to a predetermined height.

The cut sheet SH supplied into the machine reaches the sensor S7, and since the registration rollers 12 are stopped, it forms an appropriate loop and stops.

Next, in order to align the leading edge of the image formed on the photosensitive drum 11, the registration roller 12 is driven by a timing signal from the optical system, and after the leading edge is aligned, the image on the photosensitive drum 11 is cut by the transfer charger 15. After transferring to sheet SH,
The cut sheet SH is transferred to the photosensitive drum 1 by the separation charger 16.
1 and sent to the fixing device 19 by a transport mechanism.

In the fixing device, the surface of the fixing roller is controlled to a predetermined temperature by a temperature sensor and a heater (not shown) arranged on the surface of the fixing roller, the image is fixed on the cut sheet SH, and then the discharge is detected by a sensor S4, The paper is discharged to the outside of the machine by the paper discharge roller 23.

Next, in the case of multiple copies, the flapper 21 is operated by a solenoid (
The cut sheet SH, which has been fed, transferred, separated, and fixed, passes through the conveyance path 22 and is sequentially conveyed in the conveyance direction 22a, and is detected by the sensor S5. After this is detected, it is detected by sensors S6, 38, etc., and the lateral registration alignment is performed by a solenoid for lateral registration alignment.

Next, the registration rollers 12 are driven by a multiple copy command from the operation unit 41, and the cut sheet SH is sent to the position of the registration rollers 12.

Thereafter, the paper is ejected to the paper ejection tray 24 in the same manner as described above.

In addition, during double-sided copying, the transfer sheet is ejected halfway by the paper ejection roller 23 as in the case of the normal copying operation, but the trailing edge of the cut sheet SH is ejected by the flapper 23.
After passing through the cut sheet SH, the paper discharge roller 23 is driven in the reverse direction, and the cut sheet SH is guided by the flapper 21 and introduced into the conveyance path 22.

This reverse drive is performed by a solenoid that controls forward and reverse rotation. The subsequent operations are the same as in the case of multiple copying described above. In this way, in the case of double-sided copying, the cut sheet SH is ejected from the machine from the -degree paper discharge roller 23, and the cut sheet SH is turned upside down and reversed by the reverse drive of the paper discharge roller 23, and
Sent to 2a.

Although multiple copying of one sheet and double-sided copying have been described above, in the case of multiple copying of a plurality of sheets or double-sided copying, the intermediate tray portion 5 is used. As shown in FIG. 1, the intermediate tray portion 5 is provided with an intermediate tray 30 that temporarily stores the cut sheet SH on the conveyance path 31. As shown in FIG. In the case of multiple copying of multiple sheets, the fixed cut sheet SH is partially ejected by the paper ejection roller 23 under the same control as in the case of double-sided copying of the single sheet copy described above, and then the paper ejection roller 23 is driven in the reverse direction. By doing so, the conveyance path 22 and the flapper 32. It is stored in the intermediate tray 30 via the conveyance path 36.

This operation is repeated, and after all of the first side is stored in the intermediate tray 30, the feeding roller 33 is driven for the second side in response to the next copy command, and copying of the second side is executed via the conveyance path 36.

On the other hand, in the case of multiple double-sided copying, under the same control as in the case of single-sheet multiple copying, the paper passes from the fixing device 19 through the conveyance path 22.36 by the flapper 21 and is stored in the intermediate tray 30.

The subsequent operations are the same as in the case of multiple copying described above, and will therefore be omitted.

Note that in an apparatus in which an intermediate tray is configured in the image forming section 4, there is a limit to the length of the cut sheets SH that can be primarily stored, as shown in FIG. SH is paper that is half size or smaller.

FIG. 4 is a sectional view illustrating an example of an automatic document feeder disposed on the top surface of the image forming apparatus main body 1 shown in FIG. 1, and the same parts as in FIG. It is.

The structure and operation will be explained below.

An automatic document feeder 51 is disposed facing the platen glass 52 of the document scanning section 2, and includes a conveyor belt 53 wound around a drive roller 54 and a subordinate roller 62. A document stacking table 55 is arranged above the conveyor belt 53 on which a document stack consisting of a plurality of documents S constituting the document stacking section can be stacked. is provided, and the document S stacked on the document stacking table 55 is partitioned by the recycle lever 56 into a processing section document and a processed document. Further, a half-moon-shaped paper feed roller 57 is disposed at the base end 55a of this document stacking table 55, and further downstream of this paper feed roller 57, there is a separator consisting of a separation section conveyance roller 59 and a separation belt 6o. The document S stacked on the document stacking table 55 is fed by the paper feed roller 57 toward the separation section transport roller 599 and the separation belt 60, and the separation belt 6o rotates in the document feeding direction. The documents are separated and fed one by one starting from the lowest document. In addition, these paper feed rollers 57, separation section conveyance rollers 591 and separation belts 6
A paper feed stopper 61 is disposed between the paper feed stopper 61 and the paper feed stopper 61, which is located at the solid line position to position the leading edge of the document when the document S is set, and is moved to the broken line position when the stopper solenoid is energized when the document is fed. Furthermore, the separation section conveyance roller 5
A paper feed path 63 is provided from the downstream side of the 92 separation belt 60 to the above-mentioned transport belt 53, and the document sent out from these separation unit transport rollers 591 and the separation belt 6o is
The paper is fed between the conveyor belt 53 and the platen glass 52 through this paper feed path 63, and placed at a predetermined position on the platen glass 52. In the vicinity of this paper feed path 63, the document loading table 55 is placed along the outer periphery of the reversing roller 65.
A paper ejection path 66 is provided extending to the paper ejection path 66, and the document placed at a predetermined position on the platen glass 52 is conveyed again and passes through the paper ejection path 66, and is provided at the downstream end of this paper ejection path 66. The document is discharged onto the top of the stack of documents stacked on the document stacking table 55 by a paper discharge roller 67 located thereon. Further, the paper ejection path 66 branches off above the reversing roller 65, and the paper feed path 66
A reversing path 69 that merges with the paper output path 66 is disposed, and a flapper 70 that switches the conveyance path of the original is provided at the branching point between the reversing path 69 and the paper ejection path 66. When the document is reversed, the flapper solenoid is energized to be displaced to the position indicated by the broken line, and the document is guided toward the platen glass 52 via the reversal path 69. Further, a conveyance roller 71 is disposed downstream of the confluence of the paper feed path 63 and the reversal path 69, and conveys the document guided to the paper feed path 63 or the reversal path 69 toward the platen glass 52. It is configured as follows.

FIG. 5 is a plan view illustrating the scanning operation of the semiconductor laser 26 shown in FIG. 1.

In the figure, 71 is a polygon mirror, which is rotated by the scanner motor 25 at a constant speed in the direction of the arrow. The polygon mirror 71 deflects the laser beam emitted from the semiconductor laser 26, and the spherical lens 72. Toric lens 73. Photosensitive drum 1 via folding mirror 75
1, a laser beam corresponding to digital information is focused.

Reference numeral 74 denotes a beam sensor composed of, for example, a photodiode, which receives a laser beam immediately before image writing and outputs a beam detect signal to a pulse width shaping circuit 9Q, which will be described later.

FIG. 6 is a circuit diagram illustrating the configuration of the laser section 45 shown in FIG. 2, and the structure and operation will be described below.

Laser unit control information such as the position of the blank area, copy magnification 2 paper size, photo mode, add-on character code, add-on position, base color area, etc. is notified from the controller 42 to the laser unit controller 80 via the well-known 2-bot RAM 83. be done. The laser unit controller 8o alternately rewrites erase data in the blank RAMs 85 and 86 according to an external program. The blank area data read control circuit 96 outputs control signals to the blank address counter 95 and 8-bit shift register 88, and outputs area data to the data control circuit 100. 81 is a program ROM, and the laser section 45
It stores various control procedures for controlling.

The blanking RAMs 85 and 86 each have a capacity to write one line of data. The laser unit controller 80 sets the area data to R for blanking.
While writing data to one AM85.86, a control signal is output to the address switching circuit 84 and the blank data switching circuit 87 so that data can be read from the other.

Furthermore, address control will be explained.

The font ROMB2 contains stamp information 14, which will be described later.
Font data of 0 (Confidential, Urgent, 1 Circulation 5 Important, Copy Prohibited, and the font corresponding to the character code designated from the input information area is stored) is stored in advance. The laser unit controller 80 reads font data from the font ROMB 2 according to the add-on character code and sets it in the add-on RAM 103. Add-on character position designation data is written in the laser unit controller 80. The add-on controller 89 starts the add-on RA in response to a start signal from the laser unit controller 80.
Data is read from M103 and output to the data control circuit 1°O.

As shown in FIG. 5, the laser beam emitted from the semiconductor laser 26 is deflected by a rotating polygon mirror 71, and is deflected by a spherical lens 72. Pass through the toric lens 73,
The photosensitive drum 11 is scanned.

At this time, in order to extract the horizontal synchronization signal, a beam sensor 74 composed of a photodiode or the like is arranged above the laser beam scanning. The beam detect signal output from the beam sensor 74 is input to the laser section 45. Then, after being manually inputted to the pulse width shaping circuit 9o and subjected to waveform shaping, the pulse width shaping circuit 91. The BD double signal is input to the interrupt terminal of the laser section controller 80 and the pulse synchronization circuit 92.

The laser section controller 80 generates an interrupt every time the BD double signal is generated, and writes control data to the blanking RAMs 84 and 85. Further, the laser unit controller 80 outputs a control signal in the sub-scanning direction by counting the number of interruptions of the BD double signal and the like. The pulse synchronization circuit 91 outputs a reset pulse to the horizontal synchronization clock generation circuit 93 in synchronization with the rise of the BD multiplied signal described above. The horizontal synchronization clock generation circuit 93 outputs a clock HCLK synchronized with the BD multiplied signal, and is composed of a reference clock generation circuit and a frequency dividing circuit.

The pulse synchronization circuit 92 receives a BD synchronization signal H5Y for synchronizing the BD double signal with reference to the horizontal synchronization clock HCLK.
Generates NC2. The horizontal synchronization clock HCLK is counted by this BD synchronization signal H3YNC2. The output of the horizontal line counter 94 is sent to the timing signal generation circuit 9.
8, and a horizontal timing signal is output from the horizontal line counter 94 at the set count number.

7 and 8 are timing charts illustrating the sending timing of each signal shown in FIG. 6, and the same parts as in FIG. 6 are given the same reference numerals.

As can be seen from FIG. 7, the horizontal synchronization clock generation circuit 8
The horizontal synchronization clock HCLK is generated by resetting the reference clock frequency division counter in 3 with the rising detection pulse H3YNCI. Next, a BD synchronization signal H3YNC2 is generated using the horizontal synchronization clock HCLK,
Reset the horizontal line counter 94.

In addition, as can be seen from FIG. 8, the horizontal line counter 9
A set signal VBSET and a reset signal VBR3T are created from the output of 4, and an image area signal blank signal is generated. Further, the horizontal synchronization clock HCLK is used as a clock for reading data from the add-on RAM 103.

As the data read clock from the blanking RAM 85.86, a clock CLKM obtained by dividing the horizontal synchronization clock HCLK is used to make the resolution of blank area specification variable.

In addition, set signal VBSET, reset signal ■BR
3T generates a BD enable signal BDENB,
If the horizontal synchronization waveform (beam detect signal) is not input within a predetermined period, the horizontal synchronization signal error detection circuit 97
As a result, a BD error signal is output to the laser section controller 80. When the laser unit controller 80 detects the above-mentioned BD error signal, it sends the abnormal status to 2-vote RA.
The controller unit 2a is notified through M83.

A dot erase circuit 99 outputs erase data DEDATA to the data control circuit 100 so that dot patterns set for the base color mode and screen mode are formed. 101 is a laser drive circuit, which receives a control start signal A from the controller section 2a.
Light amount control is started using the PCON and APC clocks. At that time, the ready signal A is sent from the laser drive circuit 101.
PCRDY is output to the controller section 2a.

105 is a CCD data control circuit into which signals such as image data and marker area data from the CCD unit 401 are input and stored in the line memory 104;

Data is read out from the line memory 104 in accordance with the scaling factor based on the scaling signal from the controller 42, and includes the add-on information signal FDETA, the blank information signal BDATA, and the dot erase signal DEA.
Signals such as image data and marker area data are sent to the data control circuit 100 in synchronization with TA. The CCD data control circuit 105 also outputs the image address on the document of area data based on the marker, such as the start point, end point, and start point in the horizontal line direction in the horizontal synchronization direction.
The address signal of the end point address is written into the two-point RAM 83 via the laser section controller 80.

A laser scanner motor controller 102 executes drive control of the scanner motor 25 in synchronization with a control start signal LSCOH from the controller section 2a. At this time, the laser scanner motor controller 102 outputs a ready signal LSCRDY to the controller section 2a.

Next, add-on information mode setting and add-on information input processing will be described with reference to FIGS. 9 and 10.

FIG. 9 is a plan view illustrating the configuration of the editor 43 shown in FIG. 2, in which reference numeral 110 denotes an editor section, which also serves as a document pressure plate for pressing down a copy document.

Reference numeral 711 denotes a document setting surface on which a document is placed when specifying an area. Reference numeral 112 is a reference mark against which the edge of the document is abutted. Reference numeral 114 is an input information area in which character information shown in the diagram can be input.

Reference numeral 121 denotes an area designation key, which is pressed when setting an area designation mode. In addition, area specification key 1
When 21 is pressed, the area designation moto display 120 lights up. 122 is the area memory key, area specification key 1
When 21 is pressed, the area information specified by the stylus pen 113 is to be written down. 123
is a mode selection key, and when the area specification key 121 is pressed, the specified area is transferred to the developing unit 13a13b.
Press to specify and print by color.

Note that when the mode selection key 123 is pressed, seven types of two-color combinations are displayed on the display 132 according to the colors set in the replaceable developing unit 13b.

When the area memory key 122 is pressed, the display 131 lights up depending on the number of memorized areas; in this embodiment, if three areas are memorized.

124 is a clear key, which is pressed to cancel the set area designation mode. When the clear key 124 is pressed, the area designation mode display 120 turns off. 125
is an add-on mode setting key corresponding to the first mode setting means described above, which is pressed when writing characters on a copy image. When the add-on mode setting key 125 is pressed, the display 134 lights up. 126 is a character size specification key, and in this embodiment, the character size for superimposed writing is 4 m, 8 m.
Display device 1 of the specified size can be specified as m.
35,136 lights up.

Reference numeral 127 denotes a direction designation key, which is pressed to designate the writing direction of the add-on character to be vertical or horizontal, and the indicators 137 and 138 of the designated direction light up. Further, 305 is an auto key, which is pressed to recognize a marker written on a document and automatically determine the writing direction of an add-on character.

Reference numeral 128 denotes an input end key, which is pressed to end the input of add-on characters. 129 is a clear key, which is pressed to cancel the add-on mote.

130 is a stamp mode setting key corresponding to the second mode setting means. When this stamp mode setting key 130 is pressed, the display 139 lights up and the document setting surface 111
Stamp information 140 (secret 1 important, urgent 1 circulation, copy prohibited) etc. printed in advance on the stylus pen 113
The second recording mode setting is notified to the editor 43 by giving an instruction at . Furthermore, 114 is a key for instructing the front and back sides of a double-sided document. Reference numerals 742 and 143 are indicators showing the indicated state of the front and back sides.

141 is a clear key, and when this clear key 141 is pressed, the second recording mode is canceled.

FIG. 10 is a block diagram illustrating the control configuration of the editor 43 shown in FIG. 2, and the same components as in FIG. 9 are given the same reference numerals.

In this figure, reference numeral 151 denotes an editor control unit that analyzes coordinate information output from a coordinate reading unit 152 and a key input unit (various keys shown in FIG. 9), and selects a mode designated and input to the controller unit 2a. and output character codes, etc. Reference numeral 154 denotes a display, which corresponds to the various displays shown in FIG. 9, and displays the above-mentioned mode, etc. Note that N3 is the key personnel department.

[Description of Operation Unit] Next, the configuration of the operation unit 200 shown in FIG. 11 will be described.

In the figure, 201 is a power switch that controls power supply to the image forming apparatus. A reset key 202 operates as a key for returning to the standard mode during standby. 203 is a copy key. Reference numeral 204 is a color developing device switching key, and this key switches the developing unit 13a.
, 13b. Numeric keys 205 are used to mainly input the number of images to be formed.

Reference numeral 236 is a PIN entry key, which allows a specific operator to perform copying operations, while operators other than those listed above cannot make copies unless a PIN is entered using the PIN entry key 236. It becomes possible to prohibit the operation.

206 is a key for selecting cassette 3. 207 is a copy density adjustment key. 20B is a key for selecting full size copy. 20
9 is a zoom key that specifies the image formation magnification by a predetermined magnification, for example, in 1% increments; 230 is an auto magnification key that automatically enlarges or reduces according to the size of the transfer paper; 210 is a standard key that specifies a fixed reduction or fixed enlargement ratio; Magnification key 211 is a key for specifying border erasure on copy paper 212 is a key for specifying binding offset at one end of copy paper 213 is a key for specifying photo mode for copying halftone images such as photo originals ;:,・225 is an area designation key for specifying an area; 226 is an area call key for partially modifying the contents of the area set by the area designation key 225; 231
is the preheating mode key used to set the preheating mode.

214 is a multiple key that selects multiple mode. 215 is a continuous copy key that divides the copy area of the original glass stand into two left and right and automatically makes two copies. 216 is a key that selects double-sided copy mode. It is.

300 is an auto color key that is pressed to recognize the red and blue colors of the original and reproduce them in red and blue, respectively. 301 is an auto cover key that is pressed to reproduce the red and blue colors of the original, respectively. 301 is the auto cover key that allows you to create a cover, for example, by inserting colored paper as a key original into the original loaded on the feeder. Press this button when configuring palm cut paper in a desired position using colored paper.

A base color key 302 adds a base color to a portion of the document surrounded by red or blue markers. Reference numeral 303 is a shading key, which is pressed when it is desired to cast a shading on a document image.

304 is a marker processing key, which is pressed when erasing an area within or outside the area surrounded by markers on the document;
It is also used when making selections inside and outside the area while looking at the display 138.

219 and 220 are keys for specifying the operation of the sorter 50b. Numerals 222 to 224 are keys for specifying a mode for writing predetermined character data on a copy image, and specify the date write mode, memo write mode, numbering write mode, etc., respectively. Reference numerals 227 to 229 indicate mode memory keys for storing the set copy mode, and store three copy modes M1 to M3.

Further, 238 is a liquid crystal display element that displays the number of copies, transfer paper size, set magnification, message, etc. 21
7 is a guide key, 232 is an asterisk key, 233 is an up key, 234 is a down key, and 235 is a registration key.

239 to 250 are indicators using LEDs (light emitting diodes), and first, 239 functions as a sorter use indicator when a sorter is used. The display 240 functions as an automatic exposure adjustment display that lights up when the automatic exposure adjustment (AE) key 237 is pressed. The display 241 functions as a density display corresponding to the copy density adjustment key 207. The display 242 displays a color corresponding to the color of the developer when the color developer switching key 204 is pressed and a color developer in the main unit or in the optional multiple developer storage device is selected. Functions as a lighting indicator. The display 243 functions as an auto-magnification display that indicates that the auto-magnification key 230 has been pressed.

Display 244 functions as a photo mode indicator. The display 245 functions as a date writing mode display.

Display 246 functions as an area designation display. The display 247 functions as a binding margin mode display. Indicator 248 functions as a memo writing mode indicator. Indicator 249 functions as a frame erase mode indicator. Display 250 functions as a number writing display.

FIG. 12 is a block diagram illustrating the configuration of the image processing section 402 shown in FIG. 2, and the configuration and operation will be described below.

When the document to be copied is a multicolor document, the CCD sensor 311 is configured to read the document and extract color information, and in this embodiment, the configuration is such that blue, red, and black can be detected.

At the same time as the original placed on the original table is exposed and scanned in the direction of the arrow to form an electrostatic latent image on the photosensitive drum 11, the CC
The D sensor 311 reads image information of the document. C
The continuous analog output signal from the CD sensor 311 is
After being sampled by a sample hold circuit 312 and converted into a digital image signal by an A/D converter 313, a shading circuit 314 performs shading correction on the digital image signal.

315 is a color discrimination circuit that uses a lookup table (LUT) 3 preset from two digital image signals.
16, the aforementioned blue and red.

The signal is converted into a total of three color image signals including black. The three color image signals are input to a marker processing circuit 318 and an expansion circuit 317. When a region is designated on a document with a marker pen, the marker processing circuit 318 generates a section signal for the region from a color image signal corresponding to the marker color (blue or red).

The expansion circuit 317 performs arbitrary expansion on the color image signal selected by the controller 42. For example, if this dilation operation is performed on a color image signal such as a character, a color image signal with thick lines or shapes can be obtained.

A data synthesis circuit 319 synthesizes the color image signal of the marker processing circuit 318 and the color image signal of the expansion circuit 317. The output signal from the data synthesis circuit 319 is input to the line memory 320, and the line control circuit 321 controls the readout timing from the line memory 320, thereby converting the analog latent image formed on the photosensitive drum 11 by exposure scanning. The digital electrostatic latent image is aligned on the photosensitive drum 11 using a laser beam.

The output signal CCDDATA from the line control circuit 321 is input to the CCD data control circuit 105 shown in FIG. 6, and becomes an 0N10FF control signal for the laser beam.

The first automatic cover mode processing operation in the image forming apparatus according to the present invention will be described below with reference to FIGS. 13 and 14.

[First Automatic Cover Mode Processing 1 FIG. 13 is a schematic diagram illustrating the relationship between the document stack and the output paper stack during the first automatic cover mode processing in the image forming apparatus according to the present invention.

In this figure, IN indicates the stack of originals stacked on the original stacking table 55 of the automatic document feeder 51. IC○1 and IC○2 are color originals, the remaining IPI to IP4 are single-sided originals, and one-sided original I
The documents are sequentially placed on the document table starting from P4. OUT is a bundle of output sheets, and output sheets ○U1 to OU6 are stacked on the sheet discharge tray 24 in this order.

FIG. 14 is a flowchart showing an example of the first automatic cover mode processing procedure in the image forming apparatus according to the present invention. Note that (11 to (8)) indicate each step.

First, the controller 42 instructs the feeder control unit 50a to feed the original, and the single-sided original loaded on the original stacking table 55
Feeding P4 to the document table (1) At this time, the image processing unit 40
2) analyzes the image information read from the CCD unit 401 to determine whether the original is a color original 2), and notifies the controller 42 of this fact.

If this judgment determines that the original is not a color original,
The copy paper is fed (3), the predetermined copying sequence is executed (4), the original is ejected (5), and the copy paper on which the copying sequence has been completed is ejected to the paper ejection tray 24 (6). It is determined whether or not the original to be fed from the original feeding device 51 has been completed (7). If NO, the process returns to (1) and executes the original feeding process.

On the other hand, if it is determined in step (2) that the original is a color original, feed the copy paper from a predetermined cassette8).
Proceed to step (5) with the copy sequence not executed;
For example, copy paper with a blank background is directly ejected and conveyed outside the machine.

This allows the first automatic cover mode processing (for single-sided originals)
One-sided copy) is completed, and the output paper OUI shown in Figure 13 is
○U6 is discharged to the paper discharge tray 24.

The second automatic cover mode processing operation in the image forming apparatus according to the present invention will be described below with reference to FIGS. 15 and 16.

[Second Automatic Cover Mode Processing 1 FIG. 15 is a schematic diagram illustrating the relationship between the document stack and the output paper stack during the second automatic cover mode processing in the image forming apparatus according to the present invention.

In this figure, IN is a stack of originals stacked on the original stacking table 55 of the automatic document feeder 51, IC○1 and IC○2 are color originals, remaining IPI to IP4 are double-sided originals, and double-sided original I
The documents are sequentially placed on the document table starting from P4. 0TJT is a bundle of output sheets, and output sheets ○U1 to OU6 are stacked on the discharge tray 24 in this order.

FIG. 16 is a flowchart showing an example of the second automatic cover mode processing procedure in the image forming apparatus according to the present invention. Note that (1) to (11) indicate each step.

First, the controller 42 instructs the feeder control unit 50a to feed the original, and the single-sided original I stacked on the original stacking table 55
Feeding P4 to the document table (1) At this time, the image processing unit 40
2) analyzes the image information read from the CCD unit 401 to determine whether it is an original or a color original 2), and notifies the controller 42 of this fact.

If this judgment determines that the original is not a color original,
Feed the copy paper 3), execute a predetermined copying sequence to copy the back side of the original 4), reverse the original (5), reverse the fed original 6), and execute the predetermined copying sequence. Then, the front side of the original is copied (7), and the original is ejected (8).Then, the copy paper on which the copying sequence has been completed is ejected to the paper ejection tray 24 (9).Then, the original is fed from the original document feeding device 51. It is determined whether or not the document to be processed is finished (10), and if NO, the process returns to f1+ and executes the document feeding process.

On the other hand, if it is determined in step (2) that the original is a color original, feed the copy paper from the specified cassette.11)
, the copy sequence and the reverse conveyance process (via multiple or double-sided conveyance paths) of the original and the copy paper are not executed, and the process proceeds to step (8), where, for example, the blank copy paper is ejected and conveyed as it is outside the machine. This completes the second automatic cover mode process (duplex copying for double-sided originals).
Output paper 0tJ1 to OU6 or paper output tray 2 shown in Fig. 15
The paper is ejected at 4.

The third automatic cover mode processing operation in the image forming apparatus according to the present invention will be described below with reference to FIG. 17 and Section 18.

[Third Automatic Cover Mode Processing] FIG. 17 is a schematic diagram illustrating the relationship between the document stack and the output paper stack during the third automatic cover mode processing in the image forming apparatus according to the present invention.

In the same figure (a), IN is IC01, IC○2 of the document stacked on the document stacking table 55 of the automatic document feeder 51.
The originals are color originals, and the remaining originals IPI to IP5 are single-sided originals, which are placed on the original table in order from the single-sided original IP4. 0 (JT is the output paper stack, and the output paper OUI to OU is placed in the output tray 24 in this order.
6 is loaded. In addition, color original IC0L and color original IC○
This corresponds to the case where an even number of originals are set between 2 and 2.

In FIG. 5B, the IN transfers the stack of originals stacked on the original stacking table 55 of the automatic original feeder 51 to IC○1. IC○2
The originals are color originals, and the remaining originals IPI to IP5 are single-sided originals, which are placed on the original table in order from the single-sided original IP5. ○tJT is the output paper stack, and the output papers ○U1 to ○U are placed in the output tray 24 in this order.
6 is loaded. In addition, color original IC○1 and color original IC○
This corresponds to the case where an odd number of originals are set between 2 and 2.

FIG. 18 is a flowchart showing an example of the third automatic cover mode processing procedure in the image forming apparatus according to the present invention. Note that (1) to (19) indicate each step.

It is determined whether the number of originals existing between the color original IC○1 and the color original ICO2 is an odd number or an even number by circulating the stack of originals stacked on the original stacking table 55. If it is an even number, the controller 42 The feeder control unit 50a is commanded to feed the original, and the single-sided original IP4 stacked on the original stacking table 55 is fed to the original table (2).

At this time, the image processing unit 402 analyzes the image information read from the CCD unit 401 to determine whether the original is a color original (3), and notifies the controller 42 of this fact.

If this judgment determines that the original is not a color original,
The copy paper is fed (4), the predetermined copy sequence is executed to copy the back side of the original (5), the original is reversed (6), the fed document is reversed (7), and the predetermined copy sequence is performed. The copying sequence is executed to copy the front side of the original (8), and the original is ejected (9).Then, the copy sheet on which the copying sequence has been completed is ejected to the paper ejection tray 24 (10).

Next, it is determined whether or not the document to be fed from the automatic document feeder 51 is finished (11), and if NO, step (2) is performed.
Return to , and execute the document feeding process.

On the other hand, if the determination in step (3) is YES, that is, if it is determined that the original is a color original, the copy paper will be fed from the specified cassette (12) and the original will be ejected (13).
), the copying sequence and the reverse conveyance process (through multiple or double-sided conveyance paths) of the original and the copy paper are not executed, and for example, the blank copy paper is ejected and conveyed as it is outside the machine (14).

Next, it is determined whether or not the document to be fed from the automatic document feeder 51 is finished (15), and if No, step (2) is performed.
Returning to , the document feeding process is executed, and if YES, the process ends.

On the other hand, if it is determined in step (1) that the number is odd, the controller 42 instructs the feeder control unit 50a to feed the original, and the single-sided original IP4 stacked on the original stacking table 55
is fed to the document table (16).

At this time, the image processing unit 402 analyzes the image information read from the CCD unit 401 to determine whether the original is a color original (17), and notifies the controller 42 of this fact.

If this judgment determines that the original is a color original, step (
Return to step 12). If no, feed the copy paper. 18)
, execute the copying sequence on the front side of the copy paper19)
, return to step (9).

As a result, the third automatic cover mode process (duplex copying of a single-sided original) is completed, and FIG. 17(a) or FIG. 17(
Output paper ○U1~004 or output paper OUI~ shown in b)
OU5 is discharged onto the paper discharge tray 24.

The fourth automatic cover mode processing operation in the image forming apparatus according to the second invention will be described below with reference to FIGS. 19 and 20.

[Fourth automatic cover mode processing] FIG. 19 is a schematic diagram illustrating the relationship between the document stack and the output paper stack during the fourth automatic cover mode processing in the image forming apparatus according to the present invention.

In this figure, IN indicates the stack of originals stacked on the original stacking table 55 of the automatic document feeder 51, with IC○1, IC○2 or color originals, the remaining IP1 to IP4 are double-sided originals, and double-sided originals I
The documents are sequentially placed on the document table starting from P4. OUT is a bundle of output sheets, and output sheets ○U1 to ○UIO are stacked on the paper discharge tray 24 in this order.

FIG. 20 is a flowchart showing an example of the fourth automatic cover mode processing procedure in the image forming apparatus according to the present invention. Note that (1) to (11) indicate each step.

First, the controller 42 instructs the feeder control unit 50a to feed the document, and the double-sided document I stacked on the document stacking table 55.
Feeding P4 to the document table (1) At this time, image processing 140
2) analyzes the image information read from the CCD unit 401 to determine whether the original is a color original 2), and notifies the controller 42 of this fact.

If this judgment determines that the original is not a color original,
It feeds the copy paper (3), executes a predetermined copying sequence to copy the back side of the original (4), flips the original (5), ejects the fed original, and feeds the next copy paper. 6) Then, a predetermined copying sequence is executed to copy the front side of the original, and the original is ejected (8).Then, the copy paper on which the copying sequence has been completed is ejected to the paper ejection tray 24 (9). Then, it is determined whether or not the document to be fed from the automatic document feeder 51 is finished (1o). If NO, the process returns to (1) and executes the document feeding process.

On the other hand, if it is determined in step (2) that the original is a color original, feed the copy paper from the specified cassette.11)
, the copying sequence and the reversal conveyance process C of the original and copy paper (through multiple or double-sided conveyance paths) are not executed, and the process proceeds to step (8), where, for example, the blank copy paper is ejected and conveyed as it is outside the machine. As a result, the fourth automatic cover mode processing C (single-sided copying of a double-sided original) is completed, and the output sheets OUI to 0UIO shown in FIG.
The paper is ejected.

The fifth automatic cover mode processing operation in the image forming apparatus according to the present invention will be described below with reference to FIGS. 21 and 22.

[Fifth Automatic Cover Mode Processing 1 FIG. 21 is a schematic diagram illustrating the relationship between the document stack and the output paper stack during the fifth automatic cover mode processing in the image forming apparatus according to the present invention.

In this figure, IN indicates the stack of originals stacked on the original stacking table 55 of the automatic document feeder 51, IC01 is the original, IC○2 is the color original, the remaining IPI to IP4 are the page speed copy originals, and the originals are sequentially read from the double-sided original IP4. placed on a table. OUT is the output paper stack, and the output paper OUI~00 is placed in the output tray 24 in this order.
10 is loaded.

FIG. 22 is a flowchart showing an example of the fifth automatic cover mode processing procedure in the image forming apparatus according to the present invention. Note that (1) to (11) indicate each step.

First, the controller 42 instructs the feeder control unit 50a to feed the document, and feeds the page continuous copy document IP4 stacked on the document stacking table 55 to the document table (1) At this time, the image processing unit 402 controls the CCD unit. Analyze the image information read from 4Q1 to determine whether the original is a color original 2
), and notifies the controller 42 of this fact.

If this judgment determines that the original is not a color original,
The copy paper is fed (3), the predetermined copying sequence is executed to copy the right side of the document (4), the copy paper is ejected (5), the next copy paper is fed (6), and the predetermined copy is made. Execute the sequence and copy the left side of the original 7).
Eject the original (8) Next, eject the copy paper on which the copying sequence has been completed to the paper ejection tray 24 (9) Next, it is determined whether or not the original fed from the automatic document feeder 51 is finished (10). ), if No, the process returns to (1) and executes the document feeding process.

On the other hand, if it is determined in step (2) that the original is a color original, the copy paper is fed from the specified cassette.
, the copying sequence and the reverse conveyance process (via multiple or double-sided conveyance paths) of the original and the copy paper are not executed, and the process proceeds to step (8), and for example, the blank copy paper is ejected and conveyed as it is outside the machine. The automatic cover mode process No. 5 (single-sided copying of a page quick-copy original) is completed, and the output sheets ○U1 to OUI○ shown in FIG. 21 are discharged to the paper discharge tray 24.

C. Effects of the Invention As described above, the present invention includes a detecting means for detecting color information of a document fed by an automatic document feeding means during each copy mode setting set by the mode setting means;
a selection means for selecting a predetermined paper feed port for feeding a recording medium based on the color information detection result on the document by the detection means; Since a transport control means is provided to control the transport and preferentially eject the paper to the paper ejection port in the non-image forming state, no matter what copy mode is set, the document fed by the automatic document feeder has no color difference. When it is detected that information has been added, the recording medium that will become the cover page can be fed from a predetermined paper feed port and ejected and conveyed as is. Therefore, the complicated time and effort of counting the insertion positions in advance as in the conventional method is eliminated, and a cover page that can be identified at a desired position can be automatically inserted and output without mistakes.

It also includes a measuring means for measuring the number of originals inserted between specific originals fed from the automatic document feeding means, and a double-sided image of the recording medium fed based on the total number of originals measured by the measuring means. Since a setting means is provided to set the image formation start reference surface during the formation process to give priority to the front surface, no matter what copy mode is set, only the recording medium fed from the specified paper feed port will always be given priority to the white surface. It is possible to avoid outputting the page as a page, that is, a recording medium that is ejected with the white surface facing up in the reversal process and a blank cover page being continuous.

Therefore, it is possible to ascertain the inserted page without error, and it is possible to prevent mistakes in sorting in post-processing.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional configuration diagram illustrating the configuration of an image forming apparatus showing an embodiment of the present invention, FIG. 2 is a block diagram illustrating the configuration of the controller section shown in FIG. 1, and FIG. FIG. 4 is a cross-sectional view of a main part explaining the structure of a part of the intermediate tray shown in FIG. 1, and FIG. cross-sectional view,
5 is a plan view illustrating the scanning operation of the semiconductor laser shown in FIG. 1, FIG. 6 is a circuit block diagram illustrating the configuration of the laser section shown in FIG. 2, and FIGS. The figure shows the 6th
9 is a plan view illustrating the configuration of the editor shown in FIG. 2, and FIG. 10 is a control configuration of the editor shown in FIG. 2. 11 is a block diagram explaining the third
Detailed plan view illustrating the configuration of the operating section shown in the figure, 12th
13 is a block diagram illustrating the configuration of the image processing section shown in FIG. 2, and FIG. 13 is a relationship between a document stack and an output paper stack during processing in the first automatic cover mode in the image forming apparatus according to the present invention. FIG. 14 is a flowchart showing an example of the first automatic cover mode processing procedure in the image forming apparatus according to the present invention, and FIG. 15 is a schematic diagram illustrating the second automatic cover mode in the image forming apparatus according to the present invention. A schematic diagram illustrating the relationship between a document stack and an output paper stack during processing, FIG. 16 is a flowchart showing an example of the second automatic cover mode processing procedure in the image forming apparatus according to the present invention, and FIG. A schematic diagram illustrating the relationship between a document stack and an output paper stack during third automatic cover mode processing in the image forming apparatus according to
FIG. 18 is a flowchart showing an example of the third automatic cover mode processing procedure in the image forming apparatus according to the present invention;
FIG. 19 is a schematic diagram illustrating the relationship between the document stack and the output paper stack during the fourth automatic cover mode processing in the image forming apparatus according to the present invention, and FIG. FIG. 21 is a flowchart showing an example of the automatic cover mode processing procedure in the image forming apparatus according to the present invention, and FIG. The figure is a flowchart showing an example of the fifth automatic cover mode processing procedure in the image forming apparatus according to the present invention. In the diagram, 1 is the main body of the image forming apparatus, 2 is a document scanning section, 2a is a controller section, 3 is a paper feeding section, 4 is an image forming section, and 5 is a part of an intermediate tray. Figure Figure - Bebe 1v)! 0 RO, -00, 龜cJ -+++(Jm+-+ Figure Figure ○ OO-Orange QQ+ RangeQ -= 0-- Figure (a) Manuscript Higashi Ward 0 ■ No To10 Pus Dimension Fl
To -n-ko :):) Ko Ko Ko
Corif Qo-o, Qcl+Q. U--U -,- Fig. Original bundle 2] Fig. UT Copy paper fed UTIO-1' from a specified cassette Paper PA OUT9-■ 0UT8 2 OUT7-■ 0°1°--j-o. kaya) fs, 1t=ttftO
UT5 Copy paper PAOUT4 5 0UT3 6 UT2J OUTl---Ichikoku copy paper stack

Claims (2)

[Claims] (1) A mode setting means for setting a desired copy mode according to the type of document; and a mode setting means for feeding the image of the document fed from the automatic document feeding means during each copy mode setting set by the mode setting means. In an image forming apparatus capable of forming on one side or both sides of a paper recording medium, color information of a document fed by the automatic document feeding device is detected during each copy mode setting set by the mode setting device. a detection means for selecting a predetermined paper feed port for feeding a recording medium based on the detection result of color information on the document by the detection means; An image forming apparatus comprising: a conveyance control means that controls the conveyance of a recording medium to preferentially discharge the paper to a paper discharge port in a non-image forming state. (2) Measuring means for measuring the number of originals inserted between specific originals fed from the automatic document feeding means, and both sides of the recording medium fed based on the total number of originals measured by this measuring means 2. The image forming apparatus according to claim 1, further comprising a setting means for setting an image forming start reference surface to give top priority during image forming processing.