An image forming apparatus according to the present disclosure includes: a hardware processor configured to control an image former on a basis of a job pertaining to a printing execution command. The hardware processor is configured to divide the job pertaining to the printing execution command into a plurality of shortjobs, and configured to stop conveyance of the roll sheet and forcibly eject degraded toner from a developing device of the image former at a pause timing between short jobs temporally adjacent to each other among the plurality of short jobs; and the hardware processor sets a job content of each of the plurality of short jobs such that an image of a printing target is inverted upside down for each job switching of the plurality of short jobs.

An image forming apparatus includes a sheet stacking portion, an image forming portion, a detection portion configured to detect a position, in a sheet width direction, a storage configured to store position information of a sheet, and a controller. The controller is configured to cause the storage to store the position information based on a position of a sheet detected by the detection portion during execution of the job, and if sheet information of a sheet used in a previous job is matches sheet information of a sheet used in a current job, cause the image forming portion to start formation of an image to be formed on a first sheet, before a position of the first sheet is detected by the detection portion, based on the position information stored in the storage in the previous job.

Provided is an image-forming apparatus that prevents a drop in processing speed even when a preceding job is interrupted by a simple job (interrupt job). The image-forming apparatus includes a printer unit that prints on paper, a first transporting path that passes by the printer unit, a second transporting path that path branches off from the first transporting path and moves paper that has been turned over from front to back further upstream than the printer unit, a storage unit that stores a condition table indicates conditions for which a preceding job can be interrupted by an interrupt job, and a system-control unit that references the condition table, and when the preceding job can be interrupted, sets a printing order so that printing of the interrupt job is inserted into the printing order of the preceding job.

In a first image formation mode, an image is formed with a first development contrast C1 and a specific dot pattern is formed with a second development contrast C2, which is lower than the first development contrast C1; in a second image formation mode, an image is formed with a third development contrast C3 and a specific dot pattern is formed with a fourth development contrast C4, which is lower than the third development contrast C3; and when ΔC1 (=C2/C1) denotes a ratio between the second development contrast C2 and the first development contrast C1, and ΔC2 (=C4/C3) denotes a ratio between the fourth development contrast C4 and the third development contrast C3, ΔC2<ΔC1 is satisfied.

This image forming apparatus determines, in accordance with state information indicating the state of the image forming apparatus, whether or not a timing for executing an authentication process of a removable cartridge has arrived. Furthermore, if the timing for executing a cartridge authentication process has arrived, this image forming apparatus obtains authentication information regarding authentication from the cartridge, and determines, from the authentication information, whether or not an authentication process is required to be executed. When an authentication process has been executed, an authentication result is written in a storage area of the cartridge.

The image forming apparatus includes a control unit for converting image information into an image signal and output the image signal with reference to a timing signal, a sheet feeding control unit for feeding a recording material, an image forming unit for forming the image on a photosensitive drum based on the image signal output from the control unit, a transmission unit for transmitting a length of the image corresponding to a length of an output period of the image signal, an automatic sheet length detection mechanism for acquiring a length of the recording material in a conveyance direction thereof, and an image control unit for controlling a time interval at which the timing signal is output based on the size of the image and the size of the recording material.

An image forming apparatus includes: an image forming unit configured to form an image on a continuous transfer medium on the basis of image data of a job; and a controller configured to manage the job and control the image forming unit, wherein the controller has a function of adjusting an image print position on the continuous transfer medium when a job medium width size specified in the job is different from a fed medium width size used in printing.

A post-processing device for applying a post-process to a sheet fed from a device of a preceding stage is provided. The post-processing device includes a holding tray; an alignment mechanism; an output mechanism; and a control unit. In the case where a first sheet and a second sheet are different in size, the control unit performs a control in such a manner that, when the first sheet is fed, the alignment mechanism or the output mechanism shifts the first sheet to match the side edge of the first sheet and the side edge of the second sheet to be fed following the first sheet, and that, after the second sheet is fed, the output mechanism outputs the sheet bundle.

An image forming apparatus includes a first processor configured to control a transporter that transports a sheet and a first image forming section that forms an image on the sheet transported by the transporter, and a second processor configured to control a second image forming section that forms an image on the sheet transported by the transporter. The first processor and the second processor are contained in a single housing. When the first processor receives an image formation command from outside the housing and determines to perform an image forming process at the first image forming section, the first processor is configured to perform transport preparation for transporting the sheet at the transporter and receive, from the second processor, a completion notification corresponding to a preparation command, for performing image formation preparation in the second image forming section, transmitted to the second processor via an inside of the housing, and subsequently cause the transporter to transport the sheet and the first image forming section to form the image. If the first processor ascertains that an independent process involving not forming the image at the first image forming section but forming the image at the second image forming section is to be performed, the first processor is configured to perform the transport preparation before receiving the completion notification, and cause the transporter to transport the sheet after receiving the completion notification.

Copy and scan printing may include scanning, by scanner disposed along a paper path between a paper delivery roller and a paper pickup roller, content of documents (302). Further, copy and scan printing may include determining whether the documents are to be copied (304), in response to a determination that the documents are to be copied, determining whether a page count of the documents to be copied is available (306), and generating copies of the documents (310).