Abstract: An image forming apparatus to which a sheet treating apparatus is to be connected, including: a communication device, having a serial port used for serial communication with the sheet treating apparatus and a parallel port used for parallel communication with the sheet treating apparatus, configured to communicate with the sheet treating apparatus, one or more processors. The at least one of the one or more processors operates to determine a communication method to communicate with the sheet treating apparatus based on configuration information representing a connection configuration of the sheet treating apparatus, switch an operation of the serial port such that the serial port of the communication device is used in the parallel communication in a case where a determined communication method is a method in which the parallel communication is performed and the serial communication is not performed.

Abstract: An image forming apparatus includes an image processor performing image processing to image data, an image forming unit forming an image on a sheet based on the image data, and a controller changing an image forming condition of the image forming unit based on user information, in a case where a first measuring image is formed by the image forming unit to generate a first conversion condition for image data conversion in image processing to be performed by an external image processing apparatus, controlling the image forming unit based on the changed image forming condition, and in a case where a second measuring image is formed by the image forming unit to generate a second conversion condition for image data conversion in image processing to be performed by the image processor, controlling the image forming unit based on a default image forming condition.

Abstract: An image forming apparatus includes a controller configured to control a first image forming unit such that while a plurality of images are being sequentially formed, a first pattern image is formed in a first sheet-to-sheet area between a first black image and a second black image among the plurality of images on a first photosensitive body, and control the second image forming unit such that while the plurality of images is being sequentially formed, a second pattern image are formed in a second sheet-to-sheet area between a first color image and a second color image among the plurality of images on a second photosensitive body. The first sheet-to-sheet area in a case where the first pattern image is formed without the second pattern image being formed is narrower than the first sheet-to-sheet area in a case where the first pattern image and the second pattern image are formed.

Abstract: A control unit of an image forming device determines a remaining amount threshold value and selects a first mode or a second mode. In the first mode, a sheet feeding unit of the image forming device starts feeding a sheet based on presence/absence of an insertion sheet that is to be inserted by an inserter device immediately prior to a sheet fed from the sheet feeding unit. In the second mode, the sheet feeding unit starts feeding a sheet regardless of presence/absence of an insertion sheet that is to be inserted by the inserter device immediately prior to a sheet fed from the sheet feeding unit.

Abstract: An image forming apparatus that is capable of reducing influence of a failure on execution of a print job even if a post-processing apparatus that has a sheet stacking unit breaks down. Post-processing apparatuses are connected at a downstream side of an image forming apparatus in a sheet conveyance direction and apply post-processes to the sheet discharged from the image forming apparatus. A specifying unit specifies an available downstream-most apparatus from among the post-processing apparatuses. A setting unit can set a forced discharge mode in which a sheet is discharged to the downstream-most apparatus when the downstream-most apparatus is not provided with a sheet stacking unit. When the forced discharge mode is set, apparatuses at an upstream side of the downstream-most apparatus are controlled so as to discharge a sheet to the downstream-most apparatus and the downstream-most apparatus is controlled so as to discharge the sheet outside the apparatus.

Abstract: An image forming system includes a first feeding portion configured to feed a recording sheet, a second feeding portion configured to feed an inserting sheet from one of a plurality of supporting portions, and a controller capable of executing a feed-before-detection mode in which a feeding process of a current recording sheet is started before a detection portion detects whether or not a last preceding inserting sheet is present on a supporting portion selected as a feeding source of an inserting sheet from among the plurality of supporting portions. The controller is configured to start the feeding process of the current recording sheet in the feed-before-detection mode and cause the second supporting portion to feed the last preceding inserting sheet.

Abstract: An image forming apparatus includes a storage unit to store recording sheets, an image forming unit, an insertion unit, including an interleaving sheet tray on which an interleaving sheet is to be stacked, and to insert the interleaving sheet fed from the interleaving sheet tray between recording sheets conveyed from the image forming unit. The control unit selects between a first mode and a second mode to execute based on a detected remaining amount of recording sheets in the storage unit. The first mode is a mode for feeding the interleaving sheet, which is to be inserted, from the interleaving sheet tray regardless of whether a presence of the recording sheet in the storage unit is detected. The second mode is a mode for feeding the interleaving sheet from the interleaving sheet tray based on that presence of the recording sheet in the storage unit is detected.

Abstract: An image forming system includes a first feeding portion configured to feed a recording sheet, a second feeding portion configured to feed an inserting sheet from one of a plurality of supporting portions, and a controller capable of executing a job. In a case of performing a feeding process on a current recording sheet subsequent to a preceding inserting sheet, the controller is configured to start the feeding process of the current recording sheet at a predetermined timing in a state in which sheets of a first amount are supported on the first supporting portion, and start the feeding process of the current recording sheet at a timing later than the predetermined timing in a state in which sheets of a second amount smaller than the first amount are supported on the first supporting portion.

Abstract: An image forming system includes a first feeding portion configured to feed a recording sheet, a second feeding portion configured to feed an inserting sheet from one of a plurality of supporting portions, and a controller capable of executing a feed-before-detection mode in which a feeding process of a current recording sheet is started before a detection portion detects whether or not a last preceding inserting sheet is present on a supporting portion selected as a feeding source of an inserting sheet from among the plurality of supporting portions. The controller is configured to start the feeding process of the current recording sheet in the feed-before-detection mode and cause the second supporting portion to feed the last preceding inserting sheet.

Abstract: An image forming system includes a first feeding portion configured to feed a recording sheet, a second feeding portion configured to feed an inserting sheet from one of a plurality of supporting portions, and a controller configured to execute a determination process of determining whether or not there is a supporting portion usable as a new feeding source other than a supporting portion serving as a current feeding source of an inserting sheet. The controller is capable of switching between first control and second control in which a feeding process of a recording sheet is executed respectively in a first mode and a second mode in a case where it has been determined in the determination process that there is no supporting portion usable as the new feeding source.

Abstract: An image forming apparatus configured to change an interleaf control mode from a not confirmed sheet-feeding mode to a sheet-presence confirmed sheet-feeding mode when a remaining amount of recording sheets is less than a first threshold, wherein the image forming apparatus has a first mode of changing a feeding origin of a recording sheet, according to detection of absence of a recording sheet in a storage unit by a sheet presence/absence detection unit during execution of an image forming job, and a second mode of changing a feeding origin of a recording sheet, according to detection of a recording-sheet remaining amount of the storage unit less than a second threshold during execution of an image forming job, and wherein the second threshold is larger than the first threshold for changing an interleaf control mode.

Abstract: An image forming apparatus includes: an image forming unit configured to form an image on a sheet being conveyed on a horizontal path; and a double feed sensor configured to execute double feed detection processing of detecting a state in which a plurality of sheets being conveyed on the horizontal path are conveyed in a duplicate manner. The image forming apparatus includes a double feed detection function table, in which whether to enable or disable the double feed detection processing is set according to a type of a sheet. The image forming apparatus determines whether to execute the double feed detection processing at a time of image formation in accordance with sheet setting information including information on a characteristic of a sheet to be used for the image formation and setting information on whether to execute the double feed detection processing, and the double feed detection function table.

Abstract: An image forming apparatus comprises a first conveyance unit, an image forming unit, a second conveyance unit, a stacking unit, and a control unit. The control unit controls, in a case where a sheet stacking condition of the stacking unit does not satisfy a predetermined stacking condition, the second conveyance unit to convey the sheet at a second conveyance speed that is faster than the first conveyance speed. The control unit controls, in a case where the sheet stacking condition of the stacking unit satisfies the predetermined stacking condition, the second conveyance unit to convey the sheet at a third conveyance speed that is slower than the second conveyance speed.

Abstract: An image forming apparatus that is capable of reducing influence of a failure on execution of a print job even if a post-processing apparatus that has a sheet stacking unit breaks down. Post-processing apparatuses are connected at a downstream side of an image forming apparatus in a sheet conveyance direction and apply post-processes to the sheet discharged from the image forming apparatus. A specifying unit specifies an available downstream-most apparatus from among the post-processing apparatuses. A setting unit can set a forced discharge mode in which a sheet is discharged to the downstream-most apparatus when the downstream-most apparatus is not provided with a sheet stacking unit. When the forced discharge mode is set, apparatuses at an upstream side of the downstream-most apparatus are controlled so as to discharge a sheet to the downstream-most apparatus and the downstream-most apparatus is controlled so as to discharge the sheet outside the apparatus.

Abstract: An image forming apparatus includes a controller configured to control a first image forming unit such that while a plurality of images are being sequentially formed, a first pattern image is formed in a first sheet-to-sheet area between a first black image and a second black image among the plurality of images on a first photosensitive body, and control the second image forming unit such that while the plurality of images is being sequentially formed, a second pattern image are formed in a second sheet-to-sheet area between a first color image and a second color image among the plurality of images on a second photosensitive body. The first sheet-to-sheet area in a case where the first pattern image is formed without the second pattern image being formed is narrower than the first sheet-to-sheet area in a case where the first pattern image and the second pattern image are formed.

Abstract: An image forming apparatus includes a mounting portion that detachably mounts either one of a fixing portion and another fixing portion. Each fixing portion includes a first rotatable member and a second rotatable member that, together, form a nip for fixing a toner image on a sheet, and a memory. A rubbing rotatable member executes a rubbing process of rubbing a surface of the first rotatable member, and a moving mechanism moves the rubbing rotatable member between a rubbing position, in which the rubbing rotatable member is in contact with the first rotatable member, and a stand-by position, in which the rubbing rotatable member is separated from the first rotatable member. In addition, a controller stores information corresponding to an execution frequency of the rubbing process designated by an operator through an operating panel, in the memory of the fixing portion that has been mounted in the mounting portion.

Abstract: An image forming apparatus, includes: a conversion unit configured to convert image data based on a conversion condition corresponding to a halftone process type; an image processing unit configured to perform a halftone process to the image data; and a controller configured to control an image forming unit to form a predetermined measurement image on an image carrier, to control the measurement unit to measure the predetermined measurement image, and to generate a predetermined conversion condition corresponding to a predetermined halftone process type based on a measurement result. In a case where the predetermined halftone process type is not performed by the image processing unit from when the predetermined measurement image is formed last time, the controller skips formation of the predetermined measurement image by the image forming unit.

Abstract: An image forming apparatus configured to change an interleaf control mode from a not confirmed sheet-feeding mode to a sheet-presence confirmed sheet-feeding mode when a remaining amount of recording sheets is less than a first threshold, wherein the image forming apparatus has a first mode of changing a feeding origin of a recording sheet, according to detection of absence of a recording sheet in a storage unit by a sheet presence/absence detection unit during execution of an image forming job, and a second mode of changing a feeding origin of a recording sheet, according to detection of a recording-sheet remaining amount of the storage unit less than a second threshold during execution of an image forming job, and wherein the second threshold is larger than the first threshold for changing an interleaf control mode.

Abstract: A control unit of an image forming device determines a remaining amount threshold value, and selects a first mode or a second mode. In the first mode, a sheet feeding unit of the image forming device starts feeding a sheet based on presence/absence of an insertion sheet that is to be inserted by a inserter device immediately prior to a sheet fed from the sheet feeding unit. In the second mode, the sheet feeding unit starts feeding a sheet regardless of presence/absence of an insertion sheet that is to be inserted by the inserter device immediately prior to a sheet fed from the sheet feeding unit.

Abstract: An image forming apparatus includes a storage unit that stores recording sheets, an image forming unit that forms an image on a recording sheet, an insertion unit that inserts an interleaving sheet between recording sheets, a first detection unit configured to detect presence or absence of a recording sheet in the storage unit, a second detection unit configured to detect a remaining amount of recording sheets in the storage unit, and a control unit configured to control sheet feeding start timing of the interleaving sheet based on detection results acquired by the first detection unit and the second detection unit