JP2007171573A - Image forming system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maintain high image quality and high productivity by prolonging service life (durability) of developer and the materials such as a blade, a photoreceptor of an image forming system having multifunctional post-processing apparatuses and by preventing degradation in image quality. <P>SOLUTION: The image forming system has an electrophotographic image forming apparatus and the post-processing apparatuses that perform post-processing of printed paper. The image forming system includes: a storage means for registering and storing the contents of two or more types jobs and the sequence data of a printing operation corresponding to the content of each job into the image forming system in advance; an operation part for inputting set data corresponding to one of the contents of the respective jobs; and a control means for collating the set data with the registered content in the storage means and selecting a sequence circuit that matches the set data. Any one of the accelerated, decelerated, or stopped state of the drive of an image forming system unit is selected for the sequence data by the time the trailing end of the first one of the adjacent sheets is detected and then the leading end of the subsequent sheet is detected. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention enables smooth and efficient image formation while maintaining stable high image quality while avoiding toner and photoconductor deterioration even when a post-processing apparatus such as bookbinding is incorporated in the image forming apparatus as an option. The present invention relates to an image forming system.

  In recent years, with the advancement of advanced information technology, the need for an image forming system having high image quality, high productivity, and various post-processing functions based on digital technology has increased along with the image forming apparatus main body.

  However, in the realization of various functions, the image forming apparatus main body side inserts different paper sizes and paper types, so-called slip sheets, and post-processing functions include insertion, cutting, and pasting of front and back covers. A book with functions such as bookbinding using staples and staples appears, and a command combining some of these processes is input from the operation unit, and a series of work performed based on the command is defined as Job. In the middle of the process, the time interval between adjacent prints is widened, post-processing, etc. is performed, and there is a need to wait for the start of the next print without printing. The image forming unit with functions such as charging, developing, and cleaning is simply idled and waits for wear of the cleaning blade due to contact rotation with the latent image carrier (photoreceptor) and development. Deterioration is accelerated, shortening of image quality deterioration and the developer life has fallen in progress associated with it. To solve these problems, a technique as disclosed in Patent Document 1 is disclosed, but a high-speed machine is still insufficient, and further improvement is desired.

That is, when the time interval between the image forming steps in the image forming system unit (time interval between the leading edge and the trailing edge of the image area) is longer than a predetermined steady value, a driving motor for driving the developing device and the photosensitive drum is provided. As shown in FIG. 4, the drive motor off timing is determined based on a signal from a paper discharge sensor that detects discharge of a transfer material such as recording paper (hereinafter referred to as paper) from the apparatus. . That is, in the invention of the above-mentioned patent document 1, since the sensor detects that the print interval time has become longer than a certain specified interval time and then switches to a predetermined stop operation, an idling operation is required for a specified interval time. Therefore, this portion has a disadvantage that the idling cannot be shortened and reduced as shown by the portion A in FIG. In addition, a time for stopping and a start-up operation for starting rotation again are required, and as a result, as shown in part B of FIG. 5, the next print start time is delayed, which eventually increases the print productivity. There is a case where it is lowered.
JP 2000-10359 A

  The present invention eliminates the above disadvantages, extends the life (endurance performance) of materials and developers such as blades and photoconductors that are replacement parts of image forming apparatuses, and has a multifunctional post-processing device. An object of the present invention is to provide an image forming system which prevents image quality deterioration and has high image quality and high productivity.

This object is achieved by any one of the following technical means 1 to 5.
1. An electrophotographic image forming apparatus that develops an electrostatic latent image formed on an electrostatic latent image carrier with a developer carried on the developer carrier and prints it on paper, and post-processing on the printed paper In an image forming system having a post-processing device for performing
Storage means for registering and storing a plurality of types of job contents and sequence data of print operations corresponding to each job contents in the image forming system in advance;
An operation unit for inputting setting data for any one of the job contents;
Control means for selecting the sequence data to be matched by comparing the setting data with the registered content of the storage means;
The sequence data indicates that the rear end of the first sheet is detected between adjacent sheets, and the driving of the image forming system unit is in a steady speed state, a deceleration state, and a stop state until the front end of the next sheet is detected. An image forming system, wherein any one of the states is selected.
2. 2. The image forming system according to 1, wherein the data incorporated in the plurality of types of job contents includes at least one of the number of sheets, a sheet size, and a type of post-processing function.
3. The image forming apparatus according to claim 1 or 2, wherein the member that makes the drive in a decelerated state or a stopped state in the image forming system unit is at least an electrostatic latent image carrier and a stirring member of a developing device. system.
4). The sequence data for setting the drive of the image forming system unit to the deceleration state or the stop state is a condition between the paper supplied at the end of the bookbinding unit and the paper supplied at the beginning of the next bookbinding unit. The image forming apparatus according to any one of claims 1 to 3, wherein a type of the post-processing function is selected in response to the item No. 1 and a steady speed state is selected between sheets other than the above-described conditions. system.
5. 5. The image formation according to any one of claims 1 to 4, wherein the job content data and the sequence data registered in the storage unit are stored in a control table incorporated in a matrix. system.

  According to the present invention, even in a case where time-consuming post-processing functions are connected and continuously operated, the idle rotation time is selected and controlled so as to reduce the idle rotation time as much as possible. The life (durability) of the body and other materials was extended, image quality deterioration was prevented, and an image forming system having high image quality and high productivity could be provided.

  Embodiments of the present invention will be described below with reference to the drawings. In the description of the best mode for carrying out the present invention, the technical scope of the present invention is not limited by the terms used in this specification and the assertive description.

  First, the image forming system 200 will be described in detail with reference to FIG.

  The image forming system 200 includes an image reading unit 1, an image processing unit 2, an image forming unit 3, an operation unit 110, a cassette paper feeding unit 5, a large capacity paper feeding unit (LCT) 6 containing recording paper S, and a fixing device 7. , An image forming apparatus G having a paper discharge unit 8 and an automatic double-sided copy paper supply unit (ADU) 9, and a recording paper post-processing device (finisher) FS. The automatic document feeder ADF occupies the upper part of the image forming apparatus G.

  The document d placed on the document table of the automatic document feeder ADF is conveyed in the direction of the arrow, and an image on one or both sides of the document is read by the optical system of the image reading unit (scanning exposure device) 1, and the CCD image sensor 1A. Is read.

  The analog signal photoelectrically converted by the CCD image sensor 1A is subjected to analog processing, A / D conversion, shading correction, image compression processing, and the like in the image processing unit 2, and then sent to the image forming unit 3.

  In the image forming unit 3, after charging the photosensitive drum 10 as an electrostatic latent image carrier, the output light from the semiconductor laser irradiates the photosensitive drum 10 to form a latent image on the photosensitive drum 10. . Thereafter, development processing is performed by the developer 11 having the developer agitating member 12 and the developer carrier 13 for carrying the developer, and an image is formed on the paper S as a recording medium conveyed from the large-capacity paper feeding unit 6. Transcribed. After the transfer, the residual toner on the photosensitive drum 10 is cleaned by a cleaning member 17 equipped with a blade 18. The paper S carrying the image is fixed by the fixing device 7 and sent from the paper discharge unit 8 to the paper post-processing device FS. Alternatively, the single-sided image processed paper S sent to the automatic double-sided copy paper feeding unit 9 by the conveyance path switching plate 8A is again formed in the image forming unit 4 from the paper discharge unit 8 to the paper post-processing device FS after double-sided image formation. It is sent.

  The sheet post-processing device FS includes, from the top in the drawing, an insertion sheet feeding unit 40, a stacking unit 30, a stapling unit 50, and a folding unit 60 that store insertion sheets (used for front and back covers). They are arranged in a column in a substantially vertical direction. In the vicinity of the folding means 60, a cutting means 90 for cutting the edge of the saddle-stitched booklet is disposed. In this embodiment, the recording paper post-processing apparatus FS includes a cutting unit. However, after the booklet is discharged, the booklet may be cut using a general-purpose cutting machine.

  An inlet conveyance unit 70 is disposed at the upper right of the sheet post-processing device FS in the figure. Further, on the left side of the sheet post-processing device FS in the drawing, a post-processing is not performed, and a movable discharge tray 81 corresponding to Job for discharging and stacking printed sheets as they are, and a booklet booklet that has undergone saddle stitching processing. And a fixed sheet discharge tray 82 for loading the sheets.

In the image forming system, the present invention includes a storage unit 120 that stores a plurality of types of job content and print operation sequence data 126 corresponding to each job content in advance in the image forming system.
An operation unit 110 for inputting setting data for any one of the job contents;
Control means 100 for selecting the matching sequence data 126 by matching the setting data with the registered content of the storage means 120;
The sequence data includes a photosensitive drum, which is an image forming unit, between the adjacent sheets until the trailing edge of the first sheet is detected by the leading edge detector 15 and the leading edge of the next sheet is detected. 1 and the developing device 11, in particular the driving of the stirring member 12, is selected from one of the same states, a deceleration state, and a stopped state as in the case of image formation at a steady speed. is there.

  This is shown in a block circuit diagram in FIG.

  A control table combining job contents 124 storing the size, number of sheets, material, type of bookbinding of the post-processing apparatus, and presence / absence of post-processing, and appropriate sequence data 126 corresponding thereto in the storage unit 120. 121 is stored.

  By inputting the instruction data for setting Job to the operation unit 110, it is input from the operation unit 110 to the control unit 100, further collated from the control unit 100 to the storage unit 120, and the appropriate sequence data is selected, The detection value of the paper detection unit 130 is transmitted to the control unit 100, and the job is controlled to be executed.

  This is shown in a flowchart in FIG.

  In other words, the content data of the job is input to the operation unit at St1, the matching sequence data is selected at St2, and whether or not the job includes the post-processing option is determined at St3. Optional sequence data for post-processing is selected, and if it is not included, steady sequence data of St4 is selected. Then, a desired size and number of copies are obtained according to the job data input at St5, and a predetermined job is completed at St6.

  On the other hand, when St7 is selected, when the necessary number of copies is copied to one booklet selected for post-processing in St8, bookbinding in the bookbinding machine, which is the post-processing device FS, is started in St9, and St10 As soon as one book is bound, the number of books is counted and counted at St11, the process returns to St7, the next number of copies is resumed at St8, and St8 to St11 are repeated as many times as necessary (number of books). After confirming that the number of copies has reached the set value, the job is completed at St13.

  Next, the above sequence will be described more specifically with reference to an operation diagram (time chart).

In the conventional example shown in the operation diagram of FIG. 4, as described above, the printing operation is temporarily stopped between the Nth sheet and the (N + 1) th sheet, and the reactivation of the (N + 1) th sheet is performed after bookbinding or the like. It is a slow case because the processing action is inserted,
Since the N + 1th sheet, which is the next sheet, does not come after waiting the specified interval time, the drive unit (engine) side of the image forming system unit is stopped, and then the N + 1th sheet feed signal is received to resume the next printing operation. Therefore, the drive unit (engine) of the image forming system unit (photosensitive member and developing device) is rotated.

  A portion indicates a specified interval time, and the engine side is idling.

  In the conventional example shown in the operation diagram of FIG. 5, a) is a case where there is a temporary stop between sheets, and the (N + 1) th sheet comes immediately after the stop, and b) is a temporary stop in a). The productivity is compared with the case where it is not allowed.

  The conventional example shown in the block diagram of FIG. 6 represents a configuration of an idle rotation state and a rotation stop state when post-processing such as bookbinding is performed. That is, when 420 sheets are printed on A4 size paper and case binding is performed every 20 sheets, the bookbinding operation is executed for 20 seconds after the completion of the 20 printings, and the next printing is resumed after the bookbinding operation is completed. It is repeating.

  In the present invention, data to be incorporated into a plurality of job contents is organized according to the number of sheets, sheet size, and type of processing contents of the post-processing apparatus, and each job has corresponding sequence data incorporated therein. When the data is input to the operation unit, a specific job corresponding to the data is executed.

  The sequence data shown in the operation diagram of FIG. 7 executed based on the present invention is that the image forming unit is temporarily stopped in the printing operation between the Nth sheet and the (N + 1) th sheet, and bookbinding and the like. Since the post-processing operation is inserted, this is done in correspondence with the case of the conventional type in which the re-operation of the (N + 1) th sheet is delayed, and is controlled by the control means from the stored data of the image forming apparatus of the present invention. It is an example of the sequence selected and executed. That is, when the trailing edge of the Nth sheet arrives, the engine side of the image forming unit is immediately stopped without waiting for a predetermined interval time, and the idle rotation time is completely eliminated, and the N + 1th sheet, which is the next sheet. When the N + 1 sheet feeding signal for detecting the leading edge is received, the next printing operation is resumed, the engine (photosensitive member and developing unit) is rotated, and appropriate sequence data is obtained in the drive control between adjacent sheets. This is the case when selected and functioning.

  Compared to the conventional example shown in the operation diagram of FIG. 4 described above, during the operation of the post-processing apparatus for 20 seconds, there is almost no idling of the image forming system unit. In addition, fogging is greatly suppressed. In this case, the productivity is the same.

  The operation diagram shown in FIG. 8 is based on the input of job execution data to the operation unit between the Nth sheet and the (N + 1) th sheet. This shows that a steady sequence for performing time control between sheets by steady driving is selected and executed as a steady operation by the control means from the storage means of the image forming apparatus of the present invention.

  The job content data and the sequence data registered in the storage unit are stored in a control table of the image forming apparatus incorporated in a matrix, but an appropriate sequence can be obtained by inputting execution data to the operation unit. Data is selected and a printing operation is performed.

  In the above description, the imaging system unit is stopped, but the same effect can be obtained even when the imaging unit is decelerated instead of stopped.

  Now, when the image is formed with the image forming apparatus of the present invention that employs the above sequence data, and when continuous printing is performed between the image forming with the option such as bookbinding according to the conventional sequence, the density decreases. Compare the occurrence of fog and fog.

  The specifications used for image formation are as follows.

  The image forming apparatus of the present invention: a black and white copying machine capable of forming 105 A4 sheets per minute, and optionally a post-processing bookbinding machine (after stacking a set number of sheets, centering with a staple and then folding back at the center The edge is trimmed and finished, and 20 seconds are required to bind once), and the control by the sequence data of the present invention is incorporated.

  Conventional image forming apparatus: A black-and-white copying machine capable of forming 105 sheets of A4 paper per minute, and optionally a post-processing bookbinding machine (after stacking a set number of sheets, centering with a staple, then folding back at the center The book is made by trimming the edges and finishing, and 20 seconds are required for one bookbinding), but these are controlled by a conventional sequence.

  Developer: Polymerized toner (styrene-acryl, volume average particle size 6.5 μm) was used as the toner.

          The carrier used was a ferrite carrier (acrylic resin coat, volume average particle size 60 μm).

  The types of paper to be passed are as follows.

Plain paper: Konica Minolta copy paper J paper A4 size,
The evaluation method was as follows.

Print Image Quality Confirmation Test (1) Continuous copying was performed in A4 size with a 6% printing rate on the original, and the number of jobs per job was set as appropriate. Then, 300,000 copies were discarded.

  (2) An image sample was taken every 50,000 copies, and each of the three samples of A3 size, solid black, full halftone, and full white, was sampled to confirm the image.

  Then, a visual evaluation check was performed to check whether the image area was “light image density” and the non-image area was not fogged.

  Judgment criteria for “fogging”: The image with the worst image fogging on the blank paper portion is visually extracted, and the image with the worst fogging portion in one image sample with an image reflection densitometer (product name: Macbeth densitometer RD-918) Measure the fog density.

  When the density difference from the absolute reflection density of the unprinted paper is less than 0.006, “◯” is judged, and when it is 0.006 or more, “x” is judged.

  Criteria for “light image density”: The thinnest image portion of solid black is visually determined, and the image density at that location is measured by an image reflection densitometer (product name: Macbeth densitometer RD-918).

A reflection density of 1.3 or more is determined as “◯”, and a reflection density of less than 1.3 is determined as “x”.
Examples of the present invention and comparative examples (conventional) are as follows.
(1) Conventional example (comparative example 1): As shown in FIG. 4, there is a temporary stop between sheets, and the re-operation of the (N + 1) th sheet is delayed because a post-processing operation such as bookbinding is inserted.

  A “bookbinding machine” is installed as post-processing.

  A4 size / 20 sheets are collectively bound once, and the time required for this is 20 seconds.

  The operation of performing the bookbinding once every 20 sheets was repeated, and a running test was performed.

  The specified interval “A” between sheets was set to 10 seconds, and the engine was temporarily stopped for the second half 10 seconds after the first idle rotation.

  In this case, in the portion A, the engine is idling.

  Since the next sheet (N + 1 sheet) does not come after waiting for a specified interval (time), the engine automatically stops, and then receives the sheet feeding signal to the N + 1 sheet feeding unit to resume the next printing operation, and the engine (photosensitive member). And the developer) were rotated.

The results are as shown in Table 1, and the “image density” of the solid black original portion starts to decrease at 200,000 prints, “fogging” occurs on the blank white paper portion at 250,000 prints, and the image quality decreases. End continuation of.
(2) Conventional example (Comparative Example 2a): a) This is a case where there is a temporary stop between sheets, and the (N + 1) th sheet comes immediately after the stop.

      Conventional example (Comparative Example 2b): b) This is a case where the vehicle is not temporarily stopped.

  This productivity comparison clearly appears in FIGS. 5 (a) and 5 (b).

  In the case of a), a sequence for temporarily stopping the engine after the specified interval between sheets (this is essential for preventing the developer from adhering to the latent image carrier and cleaning the toner remaining on the latent image carrier) is operated. To do. However, immediately after that, a sequence for resuming the next printing operation upon receiving a paper feed signal to the paper feeding unit of the next print (N + 1th sheet) (starting up the rotation of the latent image carrier and stabilizing the potential of the latent image carrier). Pre-rotation for preventing the developer from adhering to the latent image carrier).

  In the case of b), the operation of temporarily stopping the engine is prohibited and idling is continued as it is.

Even if a paper feed signal is input to the paper feed unit for the next print (N + 1) at the same timing as in a),
Since there is no need to perform the engine stop + start-up sequence, the next print can be started earlier by “B” than in the case of a).

  Since a), which needs to be stopped and started up, can immediately start the next printing, continuous print productivity is reduced as compared with b).

  When the prescribed interval between sheets to be temporarily stopped is set, there is a disadvantage that productivity is lowered when continuous printing comes immediately after the prescribed interval time between sheets.

In the case of Comparative Example 2a and Comparative Example 2b, the same test as in Comparative Example 1 was performed, and the results shown in Table 1 were obtained. That is, the 150,000 print density was reduced and fogging occurred at 200,000 prints.
(3) Conventional Example (Comparative Example 3): As an example, as shown in the block diagram of FIG. 6, post-processing is performed as a bookbinding operation, and the idle rotation is continued without stopping the engine between sheets.

  420 sheets of A4 size are printed, and the bookbinding is performed every 20 sheets.

  Bind once for every 20 prints and run for 20 seconds.

  After the bookbinding operation, the next printing was resumed and repeated.

  For example, the total printing time is 240 seconds (= 21 times × 11.4 seconds), the total bookbinding time is 420 seconds (= 21 times × 20 seconds), and the total time from start to end is 660 seconds.

  The wasteful idling time becomes a total of 420 seconds.

  A running test was repeated for a longer time. The results are as shown in Table 1. The density decreased at 100,000 copies, and “fog” appeared at 150,000 copies, and the test was terminated.

During this time, the latent image carrier and the cleaning blade are worn out. Further, the toner in the developing device stays in the developing device as it is, and is subjected to stress and deteriorates (reduction in charging performance and fluidity due to embedding and detachment of the external toner additive). As a result, an image fog due to a decrease in image density due to a decrease in transfer efficiency and a decrease in the charge amount of toner in the developing device is likely to occur.
(4) The present invention (Embodiment 1a): As an example, as shown in the operation diagram of FIG. 7 and the block diagram of FIG. 9, a control table for decreasing or temporarily stopping the engine speed is registered and stored in advance. , The case where the control is performed based on the contents of the job, this corresponds to the case where there is a temporary stop.

  A4 size, input of bookbinding every 20 sheets is input from the operation unit of the image forming apparatus.

  Based on the control table recorded in advance in the print control unit, the operation sequence for temporarily stopping the engine between adjacent sheets was selected in the above setting.

  The engine was temporarily stopped immediately in anticipation of the sequence timing when the trailing edge of the 20 sheets after the start passed the leading edge detector 15.

  Approximately 20 seconds after the engine is stopped, a paper feed signal is input to the paper feed unit for the next print (N + 1th sheet), and the engine startup sequence is immediately executed. Then, the engine speed (the number of revolutions) and preparation for normal image creation before the start of the next print is supplied, and preparation of the image for the next print is resumed.

  The above operation is one cycle and is repeated until the end of 420 sheets. This was repeated further and the running test was continued.

  The results are shown in Table 1. That is, image quality degradation such as “density reduction” and “fogging” has not occurred up to 300,000 pudding, and good image quality could be maintained.

As Example 1b, good image quality was maintained up to 300,000 prints even when the speed of the latent image carrier and the developing device was reduced to 1/20 of that at the time of image creation instead of temporarily stopping. This is also shown in Table 1.
(5) The present invention (Embodiment 2): As an example, as shown in the operation diagram of FIG. 8, the image forming apparatus does not stop driving in advance and keeps the steady speed or decreases the driving speed. This is a case where a control table that classifies whether or not to stop is registered and stored, and when the control is performed based on the job contents, no stop is once selected.

  This is a case where A4 size paper is used, an optional function (the bookbinding function is turned off) is not provided, and continuous printing is input from the operation unit of the image forming apparatus.

  That is, based on the control table recorded in advance in the print control unit, the operation sequence is selected so that the image forming unit engine is idled at the same speed without stopping or slowing down the engine of the image forming unit between sheets in the above setting. .

  As shown in Table 1, the time between sheets is minimized and productivity is not reduced (no waste), and idle rotation between sheets is minimized. Since there was no useless increase in stress on materials such as toner, image quality degradation such as “density reduction” and “fogging” did not occur up to 300,000 pudding, and good image quality could be maintained.

1 is a schematic configuration diagram of an image forming system of the present invention. FIG. 3 is a block circuit diagram illustrating a control unit of the image forming system of the present invention. 3 is a flowchart showing control of the image forming system of the present invention. FIG. 6 is an operation diagram showing a state at the time of bookbinding in a conventional image forming system. (A), (b) is an operation diagram which shows the state at the time of bookbinding in the conventional image forming system. FIG. 10 is a block diagram illustrating a state at the time of bookbinding in a conventional image forming system. FIG. 3 is an operation diagram illustrating an example of a bookbinding state in the image forming system of the present invention. FIG. 3 is an operation diagram illustrating an example of a state where only normal image formation is performed in the image forming system of the present invention. FIG. 3 is a block diagram illustrating an example of a bookbinding state in the image forming system of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image reading part 2 Image processing part 3 Image processing part 5 Cassette paper feed part 6 Paper feed part 7 Fixing device 8 Paper discharge part 9 Automatic back surface paper feed part 10 Photosensitive drum (electrostatic latent image carrier)
DESCRIPTION OF SYMBOLS 11 Developer 12 Stirring member 13 Developer carrier 15 Leading end detector 17 Cleaning member 18 Blade 30 Stack means 40 Insert paper feeding means 50 Staple means 60 Folding means 70 Entrance conveyance part 81 Movable paper discharge tray 82 Fixed paper discharge Plate 90 Cutting means 100 Control means 110 Operation unit 120 Storage means 121 Control table 124 Job contents 126 Sequence data 130 Paper detection means 200 Image forming system G Image forming apparatus FS Post-processing apparatus S Paper

Claims (5)

An electrophotographic image forming apparatus that develops an electrostatic latent image formed on an electrostatic latent image carrier with a developer carried on the developer carrier and prints it on paper, and post-processing on the printed paper In an image forming system having a post-processing device for performing
Storage means for registering and storing a plurality of types of job contents and sequence data of print operations corresponding to each job contents in the image forming system in advance;
An operation unit for inputting setting data for any one of the job contents;
Control means for selecting the sequence data to be matched by comparing the setting data with the registered content of the storage means;
The sequence data indicates that the rear end of the first sheet is detected between adjacent sheets, and the driving of the image forming system unit is in a steady speed state, a deceleration state, and a stop state until the front end of the next sheet is detected. An image forming system, wherein any one of the states is selected. 2. The image forming system according to claim 1, wherein the data incorporated in the plurality of types of job contents includes at least one of the number of sheets, the sheet size, and the type of post-processing function. 3. The member according to claim 1, wherein the member that makes the drive in a decelerated state or a stopped state in the image forming system unit is at least an electrostatic latent image carrier and a stirring member of a developing device. Image forming system. The sequence data for setting the drive of the image forming system unit to the deceleration state or the stop state is a condition between the paper supplied at the end of the bookbinding unit and the paper supplied at the beginning of the next bookbinding unit. The type of the post-processing function is selected corresponding to the above, and a steady speed state is selected between sheets in cases other than the above-described conditions. Image forming system. 5. The job content data and the sequence data registered in the storage unit are stored in a control table incorporated in a matrix. 6. Image forming system.

Images