Abstract: An image recording apparatus is disclosed. The apparatus includes a print engine; a fixing unit; a medium sensor that outputs a detection signal when a recording medium passes said medium sensor; and a controller that determines from the detection signal whether an abnormal transportation of the recording medium has occurred or not, wherein when said controller determines from the detection signal during continuous printing that a following one of two consecutive pages of recording medium remains in said print engine after removing a preceding one of the two consecutive pages that has been abnormally transported, said controller controls said fixing unit to a predetermined temperature and subsequently allows the following one of the two pages to pass through said fixing unit at a first speed so that the following one of the two pages is discharged from the image recording apparatus.

Abstract: A document reading apparatus has a controller for conveying original documents from a section for loading documents via a section for reading documents to a section on which the documents are stacked, and controlling an operation of reading the documents. The apparatus includes respective sections for reporting apparatus information, detecting a start instruction when reading a document, and counting sheets conveyed to the reading section.

Abstract: An image forming apparatus is provided. The image forming apparatus includes: a printing section configured to perform duplex printing including printing N sheet on a first side thereof and subsequently printing M sheet on a second side thereof, wherein M is equal to or smaller than N, a suspension section which is configured to suspend the duplex printing in response to receiving a request for image adjustment during the duplex printing, while the sheet having the first face thereof printed is caused to stay in the image forming apparatus during the suspension, a correction section which is configured to update a correction data for image adjustment while the duplex printing is suspended by the suspension section, and a restarting section which is configured to restart the duplex printing suspended by the suspension section after the correction data has been updated by the correction section.

Abstract: The present invention provides an image processing apparatus which can promptly detect whether or not a jam has been removed in the case of occurrence of the jam such as a paper jam. A paper feeding apparatus 1b includes a paper feed tray 11, a pickup roller 61, a paper roller 63, a sorting roller 64, feeding rollers 66a, resist rollers 67, a paper ejection roller 73, a passage detection sensor 69, an overlapped feeding detection sensor 68 and a second detection apparatus 71. An image processing apparatus 100 includes a position detection portion 41 for detecting a location of a jam which occurs during feeding of recording paper, a determination portion 42 for determining a jam state based on a detection result of the position detection sensor 69, an examination portion 43 for examining whether the jam has been resolved and a resuming portion 44 for resuming the processing when an examination of the jam location by the examination portion 43 is finished.

Abstract: In an image forming apparatus 1 capable of reserving a plurality of printing jobs, the suspended state retention time for retaining the suspended state is preset by the operation of an operation section 142. When a printing job during output operation has been suspended, a timing section 17 starts to measure the preset suspended state retention time. If the printing job having been suspended is not resumed even after the lapse of the suspended state retention time and there is a subsequent printable job, the order of the printing jobs is changed and the subsequent printing job is executed.

Abstract: An automated banking machine (10) determines consecutive receipt jam event indications, involving at least two receipts, prior to generating a receipt jam signal. The machine, upon determining a jam event involving a first receipt, implements a jam annunciation delay routine. The routine delays generation of a receipt jam signal until at least the next receipt is also determined to be involved in a receipt jam event indication. The delay provides the opportunity for a user to clear the indicated receipt jam prior to generation of a receipt jam signal.

Abstract: An image-forming device is configured so that a process to print confidential print data is not automatically resumed after the printing process has been interrupted and the cause of the interruption has been resolved. Accordingly, the printing of confidential print data is not resumed when the user who requested the printing operation is not near the printer during an interruption and another person resolves the cause of the interruption. In this way the image-forming device prevents content of the confidential print data from being exposed to another person.

Abstract: A recording medium is moved to a transfer printing station and print images are transfer-printed. The recording medium is transported to a fixing station. A print stop is initiated whereby the recording medium is halted, a further transfer printing is prevented, and a fixing is deactivated. It is checked whether a transfer-printed but unfixed page is still located in the printing apparatus. If so, a warning notification is automatically generated. A query is made as to whether an operating command has been input. If so, it is checked whether the unfixed page would also be output unfixed. If no, the operating command is executed. If yes, the print stop is automatically maintained. It is also inspected as to whether the unfixed page would be output upon execution of an additional operating command. If no, the additional operating command is executed. If yes, an error message is automatically generated.

Abstract: A method in an information processing apparatus which communicates with a printing apparatus which stores print data and print setting information is disclosed. This method includes: an obtaining step of obtaining the print setting information from the printing apparatus; a discriminating step of, if the print setting information obtained in the obtaining step is edited, discriminating whether or not it is necessary to recreate the print data for the printing based on the edited print setting information; and a transmitting step of, if it is determined in the discriminating step that it is unnecessary to recreate the print data, transmitting the edited print setting information to the printing apparatus in order to allow the printing apparatus to print the print data stored in the printing apparatus.

Abstract: To solve the problem of incorrect jam recovery, a printer is equipped with one or more sensors to detect the number of sheets outputted to the output tray(s) of the printer. The number of sheets outputted to the tray(s) for a print job is counted, and compared to the number of pages to be printed in the print job. If the numbers do not match, the printer notifies the user of the mismatch. The user may then inspect the printed sheets to determine whether some pages are missing or extra pages have been printed, and take appropriate corrective actions.

Abstract: An image-forming device capable of image-forming on both sides of at least one sheet member, the device including an image-forming unit configured to form an image on the at least one sheet member, a sheet member supplying unit configured to supply the at least one sheet member, an image processing unit configured to process print job information, and an image-forming control unit configured to control, according to the print job information transmitted from the image data processing unit, image-forming operations on the at least one sheet member, wherein, in the event that a defect occurs in the at least one sheet member being supplied from the sheet member supplying unit during image formation on both sides of the at least one sheet member, the image-forming control unit transmits to the image data processing unit the print job information corresponding to the at least one sheet member at which a defect occurred.

Abstract: When an abnormality factor occurs in a second heating device, a sheet located upstream of a branch portion is discharged onto a discharge tray through a second conveying path. After the abnormality factor in the second heating device is removed and the sheet discharged to the discharge tray through the second conveying path is set in a paper refeeding tray, a sheet feeding portion feeds the sheet set in the paper refeeding tray to the second heating device.

Abstract: A control apparatus which makes it possible to realize a configuration for processing a plurality of print jobs efficiently without waste while meeting needs for performing a glossing process on prints. When a sheet printed in a first process is fed from a sheet feeder, the printing apparatus executes a second printing process for processing the fed sheet. When an interrupting factor occurs during execution of the second printing process to cause interruption of the processing, the interrupted processing is resumed on condition that the interrupting factor is removed. A resuming method of resuming the processing is determined based on contents of the processing in the second process.

Abstract: At step S301, since none of conveyance sensors 114, 116 and 121 detect residual paper, a CPU 203 notifies a CPU 201 that it is in a residual paper check start instruction waiting mode. At step S302, since a conveying path sensor 111 in an optional paper feed unit 101 does not detect residual paper, the CPU 202 notifies the CPU 201 that it is in a residual paper check start instruction waiting mode. At step S303, since an inlet sensor 122 of an optional paper output unit 103 does not detect residual paper, the CPU 204 notifies the CPU 201 that it is in a residual paper check start instruction waiting mode. After confirming that all the units are in the waiting mode, the CPU 201 issues a residual paper check start instruction to all the units simultaneously to improve usability by reducing initializing time.

Abstract: A printing system enabling a less wasteful and rapid printing restart for both cases where an interrupted job utilizes an ordered sheet, and where such a job utilizes a disordered sheet. A job processing unit executes a job outputting at least one sheet included in a set of a plurality of sheets in a case where sheets printed by a printing operation are outputted. A control unit controls to output, to a predetermined sheet-ejecting unit, a sheet which has not been outputted by the job processing unit among the set of a plurality of the sheets used by the job when the job executed by the job processing unit is interrupted. The job processing unit restarts to execute the interrupted job based on an instruction of a user after the sheet which has not been outputted by the job processing unit is outputted to the predetermined sheet-ejecting unit.

Abstract: When printing is interrupted, the selection between the use of a sheet bundle stacked on an accumulating tray and no use thereof is appropriately made. A bookbinding system includes a bookbinding apparatus having the accumulating tray for stacking a plurality of printed sheets thereon as the sheet bundle. When an interrupting factor is generated for interrupting a printing job, the printing is interrupted. Upon restarting the printing after the interrupting factor is cancelled, the printing apparatus determines whether the sheet bundle stacked on the accumulating tray is used for forming a bound book or not.

Abstract: A method and a device are provided for printing value-added information onto a continuous printing medium. The continuous printing medium comprises the first printing medium connected with the second printing medium. The first printing medium has the first transaction information area and a first value-added information area. The second printing medium has the second transaction information area and the second value-added information area. The first transaction information area, the first value-added information, the second transaction information area and the second value-added information area are aligned sequentially. The printing method comprises the steps of firstly printing the first transaction data and the value-added information respectively onto the first transaction information area and the second value-added information area, and secondly, moving the continuous printing medium. And the last step is to print the first the second transaction data onto the second transaction information area.

Abstract: An operator sets a distance from the page head of an alignment mark using a mark position setting switch mounted in a duplex printing system. A first printer forms the alignment mark in a position of the distance from the page head of a web, and reports position information about the alignment mark to a second printer. The alignment mark is detected by mark detection means of the second printer. Control means performs control of a web transport speed so that a phase between generation timing of a mark detection signal which the mark detection means generates by detecting the alignment mark and control timing calculated from alignment mark position data, alignment mark interval data and a web feed control signal generated at a preset period becomes constant.

Abstract: An image forming device includes an intermediate transfer member to which a toner image formed on an image bearing member is primarily transferred and which is able to simultaneously support a plurality of toner images, a secondary transfer member for secondarily transferring a toner image held on the intermediate transfer member to a sheet, a cleaning unit for removing the toner images from the intermediate transfer member after the secondary transfer, and a feeding member for feeding a sheet into the secondary transfer member. The secondary transfer member features a sheet-delay transfer mode in which a subsequent toner image on the intermediate transfer member is transferred if a previous toner image on the intermediate transfer member is out of sync with the timing at which the toner image is transferred to the fed sheet.

Abstract: An image recording apparatus includes a print engine that transfers a toner image on a recording medium, and a medium sensor disposed at an entrance of the print engine. The medium sensor outputs a detection signal when a recording medium passes by the medium sensor. When a following one of two consecutive pages of the recording medium is jammed at an entrance of the print engine, a controller completes a printing operation of a preceding one of two consecutive pages and indicates the jam of the following one of the two consecutive pages. Alternatively, the controller may control the fixing unit to a predetermined temperature, subsequently allowing the recording medium to pass through the fixing unit at a first speed and to be discharged. Still alternatively, the controller causes the print engine to stop and subsequently discharges the recording medium.

Abstract: A method and a device for accessing data wherein the data is sequentially stored as data objects. The data objects are identified by a control variable having consecutive integer values. The control variable and the memory address is determined of a first known data object and an estimate for the size of a data object is determined therefrom. The control variable of the requested data object is multiplied by the estimate, as a result whereof an initial value for a memory address of the requested data object is formed. The actual control variable of the data object stored under the initial value is determined, the search for the requested data object being terminated in the case of correspondence between the actual control variable and the desired control variable, and otherwise the search is continued.

Abstract: In an image processing apparatus of the present invention, an image storage device stores a plurality of image data. A status holding unit holds a status table having respective status descriptors, corresponding to the plurality of image data stored in the image storage device, each status descriptor indicating a status of execution of a series of image processing steps of the image data related to the status descriptor, and being updated every time one of the image processing steps of the related image data is performed.

Abstract: An image forming apparatus includes a sheet feeding cassette, transport rollers, a pick-up roller, a sheet detector, and a control section. The sheet feeding cassette stores sheets for developer images to be transferred thereonto at a secondary transfer position. The transport rollers transport a sheet at variable speeds along a sheet transport path which extends from the cassette to the secondary transfer position. The pick-up roller feeds a sheet into the sheet transport path. The sheet detector detects whether a sheet is fed from the cassette. When the detector detects that a sheet is not fed, the control section controls the pick-up roller to feed the sheet again. The control section varies respective transport speeds of the pick-up roller, a sheet feed roller, and the transport rollers, according to number of attempts to feed the sheet.

Abstract: In an image forming apparatus capable of automatically detecting an abnormality therein, thus interrupting the operation and executing a recovery operation after the abnormal state is released, a starting position of a recovery image formation desired by a user within an object page of recovery is inputted; an address of image data, corresponding to the recovery start position input by way of the input unit is determined; and an image data corresponding to the address of the recovery image data, determined by the address determining unit, is read, and the image formation is re-started after the release of the abnormality. According to the present invention, the mage forming apparatus can achieve a saving in consumables in the recovery operation and output a recovered image with a satisfactory appearance for the user.

Abstract: An integrated printing system is provided comprising a first image marking engine and a second image marking engine. The first and second image marking engines can be serially arranged with one another in a first operating mode. The first operating mode includes marking and passing of media to and from the first and second marking engines. A control system is provided for detecting a failure within one of the first and second image marking engines. A second operating mode is provided wherein the control system detects the failure and enables passing of the media through one of the first and second marking engines and marking of the media in another of the first and second marking engines when the failure is of a specified type.

Abstract: A document processing system where system software interfaces with transport hardware is provided. A medium stores the system software which includes an API for application software. The system software further includes instructions for a track control module and an exception handler. The track control module creates an object for each read document. The object reports document completion to the application software. The application software requires that document completions be reported in the same order in which the objects were created. When a document jam occurs, the track control module identifies all documents involved in the jam, and for each document involved in the jam the track control module checks if all operations are complete and if the document entered the correct pocket, and sets a flag if both events are true. The exception handler hides the documents involved in the jam that have a set flag, but displays the others.

Abstract: In an image processing apparatus of the present invention, an image storage device stores a plurality of image data. A status holding unit holds a status table having respective status descriptors, corresponding to the plurality of image data stored in the image storage device, each status descriptor indicating a status of execution of a series of image processing steps of the image data related to the status descriptor, and being updated every time one of the image processing steps of the related image data is performed.

Abstract: A controller outputs a PRE CPF-N signal and a CPF-N signal following the PRE CPF-N signal to an electrophotographic printer. The electrophotographic printer 1 starts a predetermined preparation process in response to the PRE CPF-N signal, and starts irradiation in response to the CPF-N signal. The preparation process completes by the time of when a toner image for a first page formed on a photosensitive drum reaches a transfer point where the toner image is transferred onto a recording medium.

Abstract: A multifunctional printer retains image data in an image memory when paper runs out during a copying operation, until another operation is requested or a predetermined time period expires. Also, the multifunctional printer retains information of the document that has not been recorded in a RAM when erasing the image data. Then, the information is displayed on an operation panel when the document needs to be re-scanned in order to enable the user to re-scan the document.

Abstract: A laser printer is equipped with a device for conveying a recording medium, the device being capable of detecting errors that might occur along each possible conveying path and the total number of steps involved in error resolution methods stored in an error table and capable of storing this data along with the conveying paths. The device sorts the conveying paths in order beginning from the error resolution methods involving the least total number of steps and updates the error table to reflect this order. The device then displays at least one resolution method based on the updated error table, along with the conveying path and total number of steps required to perform each resolution method.

Abstract: A plurality of photosensitive drums are disposed in a sheet transport direction so as to be in contact with a transfer belt and a transfer voltage for transferring toner images on the photosensitive drums onto a sheet transported by the transfer belt is applied thereto. A sensor for sensing a temperature or humidity in the working atmosphere of the image forming apparatus is provided; when a jam occurs, sheet transportation is ceased at a first stage to thereby enable the sheet in the jam to be removed; at a second stage subsequent thereto, transportation of the sheet is restarted; and a transport distance of the sheet is controlled based on a printing ratio of an image formed on the sheet.

Abstract: Methods for detecting mismatches between print job attributes and printer resources and capabilities that arise after rendering of the print job has begun but before rendering is complete. The method involves detecting the mismatch, placing the print job in a mismatch state and notifying the operator through the printer user interface that a given problem has occurred on a given page.

Abstract: Disclosed is a method, system, and program for generating a blank side of a page in a print job. Bitmap data is received for at least one side of at least one page of a print job. The bitmap data for the at least one side is sent to a printer engine to control the printer to print the print job over a data path. For a blank side in one page in the print job, a command is issued to resend bitmap data for one side previously sent to the printer engine. A further command is issued to disable the data path to cause the transmission of white data to the printer engine. This disabling of the data path prevents the resent bitmap data from reaching the printer engine, which, in turn, causes the printer to produce the blank side in response to receiving the white data.

Abstract: A main CPU causes a sheet jam indicator in a status display portion to blink when a sensor unit detects a sheet jam, produces a correct action sound when a cover related to the jam cleaning process is opened, and produces an error sound when a cover unrelated to the jam cleaning process is opened.

Abstract: A dynamic job recovery system for an electronic reprographic printing system provides warranted performance by monitoring and ensuring variable data job integrity and consistent output appearance through close control of image quality and content integrity. The system monitoring the performance of a particular attribute indicative of one of image quality and variable data content integrity, preferably with real-time control, with one or more warranted performance sensors while in a customer print job mode. If monitored attributes are within desired specification and integrity, processing of the customer print job is continued. A warranted performance fault action is conducted if one or more attributes are out of range. When this occurs, print sheets in progress are purged to a purge tray (those with compromised integrity or quality and upstream incomplete sheets). Then, a diagnostic routine is initialized without machine cycle down to identify sources of the fault.

Abstract: The present invention relates to providing supplemental counts or “clicks” to account for recovery conditions in a document processing system. Furthermore, these recovery condition “clicks” will be further modified depending upon the type of recovery condition encountered. The application of recovery counts thus modified when combined with the system cycle count and suitably summed will provide superior measure of the wear for a replaceable element as well as improved indication for the determination of the end of life of a replaceable element in that system. In this manner, the more timely service or substitution for that replaceable element in the system can be provided, thereby allowing costs and service down-time to be minimized.

Abstract: A dynamic job recovery system for an electronic reprographic printing system provides warranted performance by monitoring and ensuring variable data job integrity and consistent output appearance through close control of image quality and content integrity. The system monitoring the performance of a particular attribute indicative of one of image quality and variable data content integrity, preferably with real-time control, with one or more warranted performance sensors while in a customer print job mode. If monitored attributes are within desired specification and integrity, processing of the customer print job is continued. A warranted performance fault action is conducted if one or more attributes are out of range. When this occurs, print sheets in progress are purged to a purge tray (those with compromised integrity or quality and upstream incomplete sheets). Then, a diagnostic routine is initialized without machine cycle down to identify sources of the fault.

Abstract: The present invention relates to providing supplemental counts or “clicks” to account for recovery conditions in a document processing system. Furthermore, these recovery condition “clicks” will be further modified depending upon the type of recovery condition encountered. The application of recovery counts thus modified when combined with the system cycle count and suitably summed will provide superior measure of the wear for a replaceable element as well as improved indication for the determination of the end of life of a replaceable element in that system. In this manner, the more timely service or substitution for that replaceable element in the system can be provided, thereby allowing costs and service down-time to be minimized.

Abstract: When a jam happens at the second printer in a tandem printer system, the printing operation is terminated at the first and second printers. The continuous sheet after establishment of the primary page images at the first printer is reserved between the first and second printers. The first recovery page for the second printer is determined based on the primary page images on the continuous sheet remaining between the first and second printers. Accordingly, it is not necessary to remove the entire continuous sheet remaining between the first and second printers when the printing operation should be recovered. It is possible to minimize the loss of the continuous sheet reserved between first and second printers even when a jam happens at the second printer.

Abstract: A printing system comprises at least one input source for storing a medium prior to printing or otherwise operating on the medium and a second input source to store at least one set of an ordered media comprising a plurality of sheets having different physical characteristics. A central processing unit stores a graphical representation of the set of ordered media. Upon the occurrence of a jam in the printing system, the central processing unit determines which sheet of the set of ordered media is the correct one to recover to. The central processing unit generates a graphical representation indicating the correct sheet of the set of ordered media to be recovered to and displays the representation on a display for the operator.

Abstract: When a jam happens at the second printer in a tandem printer system, the printing operation is terminated at the first and second printers. The continuous sheet after establishment of the primary page images at the first printer is reserved between the first and second printers. The first recovery page for the second printer is determined based on the primary page images on the continuous sheet remaining between the first and second printers. Accordingly, it is not necessary to remove the entire continuous sheet remaining between the first and second printers when the printing operation should be recovered. It is possible to minimize the loss of the continuous sheet reserved between first and second printers even when a jam happens at the second printer.

Abstract: The system monitors the number of sheets that should be housed in the finishing tray based on the information from the copying machine, the output from the sensor located on the sheet conveyance path to the finishing tray unit and the signals that indicate ejection of the sheets from the finishing tray. When jam correction is performed, the system determines the number of sheets for which image formation should be re-performed in accordance with the output from the finishing tray paper detection sensor.

Abstract: When a jam process is completed and a copying operation is restarted, a main CPU determines whether the copying operation which is presently set relates to copying of plural copy sets. If it is determined that the copying of plural copy sets is to be performed, the main CPU conforms which original in an order of originals is in the process of copying. If it is confirmed which original is in the process of copying, copies of this original already delivered on sort bins are discharged onto a recycle tray. Then, the set copying operation is restarted from copying of this original.

Abstract: A printing system comprises at least one input source for storing a medium prior to printing or otherwise operating on the medium and a second input source to store at least one set of an ordered media comprising a plurality of sheets having different physical characteristics. A central processing unit stores a graphical representation of the set of ordered media. Upon the occurrence of a jam in the printing system, the central processing unit determines which sheet of the set of ordered media is the correct one to recover to. The central processing unit generates a graphical representation indicating the correct sheet of the set of ordered media to be recovered to and displays the representation on a display for the operator.

Abstract: An image forming apparatus is provided with an automatic document feeder. Even if a document is jammed in the automatic document feeder, what is required of the user is to set all documents on a document tray once again, including the jammed document, documents from which image information have already been copied, and documents from which image information have not yet been copied. Of the documents re-set on the document tray, the documents from which image information have been copied are discharged onto a discharge tray, without executing a copying operation. In other words, a copying operation is executed only for the documents from which image information have not been copied. The number of documents from which image information are copied is counted by checking the outputs from an alignment sensor.

Abstract: An image forming apparatus includes an image bearing member; a charging member for charging a surface of the image bearing member while contacting thereto with a predetermined voltage applied to the charging member; exposure member for exposing the surface of the image bearing member to form an electrostatic latent image; a toner carrying member contacted to the image bearing member with a predetermined voltage applied to the toner carrying member to visualize the electrostatic latent image into a toner image with toner carried thereon; an image transfer member for urging a transfer material to contact the transfer material to the image bearing member with a predetermined voltage applied to the image transfer member to transfer the toner image onto the transfer material; a device for applying the predetermined voltages to the charging member, the toner carrying member and the transfer member; and a controller for controlling the device that applies the predetermined voltage, the controller being operable in a

Abstract: A printing apparatus and a printing method for the printing apparatus, along with a paper ejecting position control method and apparatus of the printing apparatus are provided wherein a print control unit is provided with an instruction evacuating area and a paper ejection evacuating area both for storing information associated with the ejecting position. The ejecting position is contained in an instruction provided to a printing portion based on offset information and contents stored in the instruction evacuating area. The contents of the paper ejection evacuating area are updated based on ejecting position contained in the instruction provided to the printing portion. The paper ejection evacuating area is updated based on the actual ejecting position, and the contents of the instruction evacuating area are updated based on the contents of the paper ejection evacuating area in a recovery after printing failure occurred, therefore, paper can always be ejected to the proper position.

Abstract: Disclosed are a multifunctional apparatus equipped with a jam recovery device and a selective jam recovery method. The multifunctional apparatus has an image forming unit enabling the apparatus to record image data onto a recordable medium. The multifunctional apparatus can record two types of data. When a page of a first type of data is stored in a page queue processor of the multifunctional apparatus and starts to be recorded onto a first page of a recordable medium, the page queue processor deletes the page of the first type of data according to whether the first page of the recordable medium has been successfully discharged from the multifunctional apparatus and, importantly, also according to a condition of a discharge error recovery function.

Abstract: A finisher is disclosed which is connected to a copying machine and possessed of a stapler which effects a stapling treatment on the sheets discharged from the copying machine and a binder which inserts the discharged sheets into a cover and binds by adhesion the sheets and the cover for bookbinding. This finisher has a memory for memorizing the stapling treatment or the binding treatment as a treating mode in advance, a staple sensor for detecting the existence of the staple, and a cover sensor for detecting the existence of the cover. When either of the sensors detects the lack of staple or cover, a feasible treating mode other than the unfeasible treating mode due to the lack of staple or cover in the treating mode memorized in the memory is executed prior to the unfeasible treating mode.

Abstract: An image forming apparatus capable of simultaneously performing an image forming operation of a first job and an image reading operation of a second job wherein the jobs comprise a plurality of sheets. The apparatus has a controller which continues the image reading operation of the second job even when the image forming operation of the first job is stopped, and prohibits the start of an image reading operation of a third job different from said first and second job when the image reading operation of said second job ends.