Canon Kabushiki Kaisha

Akihiro Kawakita

Koji Yumoto

Satoru Yamamoto

Riki Fukuhara

Toshiyuki Miyake

Takashi Yokoya

Katsuya Nakama

Akinobu Nishikata

Yutaka Ando

Hiroto Nishihara

Yohei Katto

Kenji Morita

Yasuharu Chiyoda

Akihiro Arai

Teruhito Kai

Masahiro Tsujibayashi

Yuichiro Oda

Nobuhiro Kikuchi

Tomohiro Hasegawa

An image forming apparatus includes a sheet accommodating portion, an image forming portion, an accommodating portion opening portion, a lifter plate, a lifter plate lifting and lowering mechanism, a lower-limit detecting portion, a control unit lowering the lifter plate and opening the accommodating portion in accordance with an operation in a set mode of a plurality of modes when the control unit receives an instruction to open the accommodating portion, wherein the modes includes a first mode in which the accommodating portion is opened irrespective of whether or not the lifter plate lowers to the lower-limit position and a second mode in which the accommodating portion is opened after the lifter plate lowers to the lower-limit position; and an operating portion operable by an operator for changing setting of the mode, between the modes, executed when the control unit receives the instruction to open the accommodating portion.

Image forming apparatus

An apparatus including: a forming unit configured to form a measurement image on a sheet; a fixing unit configured to fix the measurement image; a measurement unit provided downstream of the fixing unit in a sheet conveyance direction and configured to measure a color of the fixed measurement image; a detector configured to detect whether a cooling device having a cooling function valid is connected between the fixing unit and the measurement unit; and a controller configured to determine, in a case in which the color of the measurement image is measured, a time to be taken after the sheet has passed through the fixing unit until the measurement unit starts measuring the color of the measurement image based on a result of the detector, and to control sheet conveyance based on the determined time.

An image forming system includes a first feeding portion configured to feed a recording sheet, an image forming portion, a sheet conveyance path, a second feeding portion configured to feed an inserting sheet from any of a plurality of supporting portions including a first supporting portion and a second supporting portion, a detection portion, and a controller. The controller is configured to execute, during execution of a process of feeding a first inserting sheet from the first supporting portion to the sheet conveyance path, a movement processing of moving a second inserting sheet supported on the second supporting portion to a position where a trailing edge of the second inserting sheet is placed downstream in a sheet conveyance direction of a detection position of the detection portion and thereafter stopping the second inserting sheet.

Image forming system

An image forming apparatus is configured to execute a print job for printing on a sheet supplied from a sheet supplying mechanism formed of 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 includes 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 forming 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.

Image forming apparatus and image forming system

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.

An image forming system includes a first feeding portion to feed a recording sheet, a second feeding portion 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 starts 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 starts 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.

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.

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.

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.

An image forming apparatus includes 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. 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 another 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.

Image forming apparatus, method for controlling the same, and non-transitory computer-readable storage medium

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.

Image forming apparatus for suppressing discharged paper adhesion

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.

Image forming apparatus, image forming system and detecting method of abnormal feeding

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.

Image forming apparatus, image forming system, and image forming method with sheet feeding abnormality control

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.

Image forming apparatus that controls an execution frequency of a rubbing treatment of a fixing device

An image forming apparatus includes a fixing unit configured to fix a toner image to a sheet; a sheet moving motor configured to move the sheet in a width direction orthogonal to a conveyance direction of the sheet; and a controller configured to determine a movement amount of the sheet to be moved by the sheet moving motor for each sheet, wherein the controller sets a first movement amount for a first sheet when an image is formed on a first side of the first sheet, the controller sets a second movement amount for a second sheet when an image is formed on a first side of the second sheet, and controls the sheet moving motor such that the first sheet is moved in the width direction by the first movement amount when an image is formed on a second side of the first sheet.

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Abiko, Japan

Akihiro Kawakita