Abstract: An image forming apparatus including a controller configured to start feeding a sheet from a feeding unit without confirming a presence or absence of an insert sheet to be inserted before the sheet when an amount of insert sheets stacked on a stacking tray as a feed source is higher than a predetermined amount, wherein in a case in which the amount of the insert sheets on the stacking tray is lower than the predetermined amount, the controller starts feeding a sheet from the feeding unit without confirming a presence or absence of the insert sheet when an other stacking tray on which an amount of insert sheets is higher than the predetermined amount is present, and the controller starts feeding the sheet from the feeding unit after confirming the presence or absence of the insert sheet when the other stacking tray is absent.

Abstract: An image forming system comprises: an image forming unit configured to form an image on a recording medium; a feeding unit on which the recording medium is placed and configured to convey the recording medium toward the image forming unit on a conveyance path; an insert unit on which an insert sheet is placed and configured to convey the insert sheet so as to insert the insert sheet between a plurality of recording mediums conveyed from the image forming unit; a storage unit configured to store information concerning feeding of the recording medium; and a control unit configured to control a feeding timing of the insert sheet by the insert unit based on the information stored in the storage unit.

Abstract: Provided is a puncher having activating/inactivating switch for post-processing function. The puncher prevents undesirable post processing even if the switch indicates activation of the post processing. When a puncher which is registered in the image forming apparatus is attached to the puncher, the puncher obtains information indicating whether or not to the post processing using a punch die is activated or not. When the obtained information indicates that the post processing using the punch die is inactivated, even if the switch indicates activation of the post processing, the post processing is not performed.

Abstract: An image forming system capable of properly managing maintenance information on a punch die mounted on a puncher. The puncher punches holes in a sheet using a removably mounted punch die. A punch die memory mounted on the punch die stores maintenance information concerning the punch die. A CPU of the image forming system detects mounting of a punch die. A RAM of the same stores maintenance information concerning each of punch dies mounted on the puncher. When a punch die is mounted on the puncher, the CPU performs comparison between maintenance information is stored in the RAM, and maintenance information stored in the punch die memory, and when the maintenance information stored in the RAM is older, the CPU updates the information in the RAM to the information in the punch die memory.

Abstract: An image forming apparatus transmits a sheet feeding request to the sheet feeding device, obtains a sheet through a receiving device and performs image formation on the sheet. The receiving device comprises an inlet sensor for detecting a sheet fed from the sheet feeding device. The image forming apparatus transmits the sheet feeding request to the sheet feeding device again in a case where the inlet sensor does not detect a sheet within a predetermined time after the sheet feeding device starts to feed a sheet and no signal indicating an abnormality with regard to a sheet is received from the sheet feeding device. If the number of times the sheet feeding request is transmitted exceeds a predetermined number of times, the image forming apparatus stops operation.

Abstract: An image forming apparatus to which a first feeding device which does not notify abnormal sheet feeding or a second feeding device which notifies the abnormal sheet feeding is connectable includes a sheet receiving portion, a sheet detector, an image forming unit, and a controller. In a case that the first feeding device is connected to the image forming apparatus, the controller discriminates that the abnormal sheet feeding occurs in the first feeding device when the detector does not detect the sheet at first timing. In a case that the second feeding device is connected to the image forming apparatus, the controller discriminates that the abnormal sheet feeding occurs at the sheet receiving portion when the detector does not detect the sheet at second timing and notification of the abnormal sheet feeding is not provided from the second feeding device.

Abstract: An image forming apparatus configured to execute a print job for printing on a sheet supplied from a sheet supplying mechanism constructed by a first sheet feeding apparatus configured to temporarily stop conveyance of the sheet within a conveyance path thereof or a second sheet feeding apparatus configured not to temporarily stop conveyance of the sheet within a conveyance path thereof, the image forming apparatus including: an image former configured to form an image on the sheet; an obtaining device configured to obtain apparatus information representing a type of an apparatus constructing the sheet supplying mechanism; and a controller configured to determine, based on the apparatus information and the sheet supplying mechanism instructed to feed the sheet by the print job, timings to send, to the sheet supplying mechanism, a feed request for starting to feed the sheet and a delivery request for instructing to deliver the sheet.

Abstract: An image forming apparatus includes an image forming station, a mounting portion for mounting one of fixing devices, each including a first roller and a second roller which cooperate to form a nip for fixing a toner image on a sheet fed from the image forming station, a rubbing roller configured to rub a surface of the first roller, a storing portion capable of storing information, a counter for counting sheets fed to the fixing device mounted on the mounting portion and to store a number indicative of the number counted by the counter in the storing portion of the fixing device, and an executing portion for effecting a rubbing treatment to the first roller of the fixing device, when the number counted by the counter on the basis of the number in the storing portion of the fixing device mounted on the mounting portion exceeds a predetermined number.

Abstract: To prevent sheets from being allowed to be delivered after activation of a system when over-stacking has been detected before the activation of the system, a post-processing apparatus includes a stacking tray configured to allow sheets subjected to predetermined processing to be stacked thereon. The post-processing apparatus determines whether or not additional sheets are allowed to be stacked onto the stacking tray based on the number of sheets stacked on the stacking tray. The determination result indicating that the additional sheets are prohibited to be stacked onto the stacking tray is stored in a nonvolatile RAM. The post-processing apparatus determines, after being activated, whether or not the determination result is stored in the nonvolatile RAM, and determines that the additional sheets are prohibited to be stacked onto the stacking tray when the determination result is stored in the nonvolatile RAM.

Abstract: A punching apparatus capable of performing update work for updating maintenance information, irrespective of whether or not a punch die is mounted. A puncher includes a punching unit that punches a sheet using an exchangeable punch die provided with a die memory, and a CPU that detects mounting of a punch die in the punching unit. The CPU receives an update request requesting update of maintenance information stored in the die memory of the punch die. If mounting of the punch die is detected, when the update request designating the punch die is received, the CPU updates the maintenance information of the punch die based on the update request. If mounting of the punch die is not detected, the CPU updates the maintenance information of the punch die when mounting of the punch die is detected.

Abstract: An image forming apparatus has an image forming station, a mounting portion, and a fixing portion that includes a first rotatable member, a second rotatable member, a rubbing rotatable member configured to rub a surface of the first rotatable member during a rubbing treatment, and a storing portion capable of storing number information. A number of recording materials fed to the fixing portion is counted, written into the storing portion, and used to determine whether to execute the rubbing treatment. In a case in which, in sequence, the recording material is fed to the mounted fixing portion, the mounted fixing portion is removed and replaced with another fixing portion, and the removed fixing portion is remounted, both number information acquired from the storing portion and the number of recording materials fed to the remounted fixing portion are used to determine whether to execute the rubbing treatment.

Abstract: A sheet processing apparatus that is capable of properly performing fold line processing at a position depending on a sheet bundle. In a sheet processing apparatus, sheets sequentially received from an image forming apparatus are stacked on a bookbinding processing tray to form a sheet bundle. The sheet bundle is folded at the center thereof, and is conveyed to a processing position. A press unit moves along a fold line portion of the sheet bundle to thereby perform flattening processing for flattening the fold line portion by pressing the fold line portion from a direction orthogonal to a thickness direction. A first pressing strength set by a user using the image forming apparatus and the second pressing strength acquired information on the sheet bundle are compared with each other, and the processing position is determined based on a result of the comparison.

Abstract: An image forming apparatus includes an image forming unit to form an image on a sheet, an intermediate processing tray where sheets conveyed through a first conveyance path are stacked as a sheet bundle, a sensor disposed at a second conveyance path to detect a conveyed sheet bundle, and a stacking tray in which sheets discharged through a discharging path diverging from the first conveyance path are stacked. In response to a sensor detected paper jam, a control unit determines the intermediate processing tray as the discharging destination for a sheet among the remaining sheets, and determines the stacking tray as the discharging destination for a sheet among the remaining sheets. After the paper jam is cleared, the control unit causes execution of bookbinding and cutting for a sheet bundle including the remaining sheets stacked in the intermediate processing tray.

Abstract: A sheet processing apparatus that is capable of facilitating a process by eliminating waste of a result even if a translucent sheet is conveyed. A conveyance unit conveys a sheet received from an image forming apparatus. An optical sensor detects a sheet end conveyed. An alignment unit aligns sheets based on information detected by the optical sensor. A post-process unit performs a post-process to the sheets aligned. An input unit inputs sheet information about a type of the sheet to be received from the image forming apparatus. A control unit stops sheet conveyance when the sheet information indicates a first type sheet and when the optical sensor cannot detect the sheet end, and continues sheet conveyance when the sheet information indicates a second type sheet of which transmittance is higher than the first type sheet and when the optical sensor cannot detect the sheet end.

Abstract: An image forming system capable of properly managing maintenance information on a punch die mounted on a puncher. The puncher punches holes in a sheet using a removably mounted punch die. A punch die memory mounted on the punch die stores maintenance information concerning the punch die. A CPU of the image forming system detects mounting of a punch die. A RAM of the same stores maintenance information concerning each of punch dies mounted on the puncher. When a punch die is mounted on the puncher, the CPU performs comparison between maintenance information is stored in the RAM, and maintenance information stored in the punch die memory, and when the maintenance information stored in the RAM is older, the CPU updates the information in the RAM to the information in the punch die memory.

Abstract: An image forming system capable of properly managing maintenance information on a punch die mounted on a puncher. The puncher punches holes in a sheet using a removably mounted punch die. A punch die memory mounted on the punch die stores maintenance information concerning the punch die. A CPU of the image forming system detects mounting of a punch die. A RAM of the same stores maintenance information concerning each of punch dies mounted on the puncher. When a punch die is mounted on the puncher, the CPU performs comparison between maintenance information is stored in the RAM, and maintenance information stored in the punch die memory, and when the maintenance information stored in the RAM is older, the CPU updates the information in the RAM to the information in the punch die memory.

Abstract: A sheet conveying apparatus that restricts conveyance of sheets to a post-processing apparatus which has become incapable of continuing a post-processing operation. The sheet conveying apparatus is communicably connected to the post-processing apparatus that performs post-processing on a sheet bundle formed by sheets. The sheet conveying apparatus includes a conveying unit for conveying sheets and an escape tray for receiving conveyed sheets which are not conveyed to the post-processing apparatus. A value corresponding to the number of sheet bundles formed by conveyed sheets is counted. A CPU circuit section determines based on communication with the post-processing apparatus whether or not the post-processing operation can be continued thereby. When it is determined that the post-processing operation cannot be continued, the CPU circuit section switches the sheet conveying destination from the post-processing apparatus to the escape tray, based on the counted value.

Abstract: A sheet processing apparatus capable of properly stacking sheets by detecting abnormality of a sheet stacking state during a sheet stacking operation to thereby prevent stack overflow. In the sheet processing apparatus, a conveyed sheet is stacked on a stacking tray. A sheet presence sensor detects a sheet on a sheet stacking surface of the stacking tray. A sheet height reduction sensor detects sheets within a predetermined distance downward from the uppermost surface of sheets stacked on the stacking tray. When the sheet presence sensor detects no sheet, and the sheet height reduction sensor detects a sheet during an operation for discharging a plurality of sheets onto the stacking tray, it is determined that an abnormal stacking state has occurred, and conveyance of a sheet is stopped.

Abstract: An image forming system capable of producing a center-folded or saddle-stitched brochure having punched holes at identical positions between the front and back sides thereof even when a saddle-stitching or center-folding position is set to a location shifted from a sheet center position. A puncher punches holes in a sheet. A finisher folds a sheet bundle formed by sheets each having the holes punched therein. A console sets an adjustment value for adjusting a folding position at which the sheet bundle is folded by the finisher, according to a manual operation. When the adjustment value is larger than a reference value, the puncher determines a punching position with respect to a folding position having the adjustment value reflected thereon and punches the holes in the determined punching position.

Abstract: An image forming system capable of properly managing maintenance information on a punch die mounted on a puncher. The puncher punches holes in a sheet using a removably mounted punch die. A punch die memory mounted on the punch die stores maintenance information concerning the punch die. A CPU of the image forming system detects mounting of a punch die. A RAM of the same stores maintenance information concerning each of punch dies mounted on the puncher. When a punch die is mounted on the puncher, the CPU performs comparison between maintenance information is stored in the RAM, and maintenance information stored in the punch die memory, and when the maintenance information stored in the RAM is older, the CPU updates the information in the RAM to the information in the punch die memory.