Canon Kabushiki Kaisha

Ichiro Sasaki

Akinobu Nishikata

Naoto Watanabe

Mitsuhiko Sato

Manabu Yamauchi

Keizo Isemura

Hidenori Sunada

Takayuki Fujii

Shunsuke Nishimura

Naohisa Nagata

Toshiyuki Miyake

Takashi Yokoya

Hiroshi Matsumoto

Satoru Yamamoto

Kunio Tsuruno

Hitoshi Kato

Takahiro Watanabe

Keita Takahashi

Takuya Kawamura

Noriaki Matsui

Kenji Fukushi

Shinsuke Ubayashi

Masahiro Serizawa

Mitsuo Nimura

Ikuo Takeuchi

Hiroto Nishihara

Tetsuya Morita

Atsushi Nakagawa

Tomoyasu Yoshikawa

Masahiro Kurahashi

Yasuo Fukatsu

Akihiko Sakai

Hiroaki Tomiyasu

Shinichi Onodera

Satoshi Okawa

Yuzuru Yano

Takashi Nakanishi

Shigemi Kumagai

An image forming apparatus accumulates the number of input print jobs when a control circuit of the image forming apparatus recognizes that, during the execution of the first print job having a sheet post-processing setting, a subsequent new print job having no sheet post-processing settings is input. If the accumulated number of input print jobs is less than or equal to a predetermined value, the image forming apparatus allows the interruption of the first print job by the subsequent new job.

Image forming apparatus

There are provided an image forming apparatus which is capable of efficiently performing necessary actions to thereby reduce downtime. At least one job can be registered. Image formation is performed according to the at least one registered job. Action objects are detected on which actions necessary for the image forming apparatus should be taken.

Image forming apparatus and image forming system

A sheet conveying system which is capable of preventing a jammed sheet from being mixed with processed sheets, reducing waste in sheets and toners, and further alleviating the user's operations, when jamming has occurred during passing of a sheet between respective sheet conveying devices of upstream and downstream apparatuses. A puncher control section of a puncher as an upstream apparatus of the system issues a passing completion notification as to the passing of a sheet to a staple stacker control section of a staple stacker as a downstream apparatus of the system. Upon reception of the notification, when the staple stacker control section determines that the parameter of auxiliary information of the notification indicates an abnormal discharge of the sheet from the puncher, the staple stacker stops the conveyance of the sheet.

Sheet conveying system, control method therefor, control program for implementing the method, and storage medium storing the program

An image forming system comprises a selection unit for selecting a post-processing apparatus that executes post-processing to a recording medium on which an image is formed from among a plurality of post-processing apparatuses, and a selection limitation unit for determining an insertion apparatus whose supply of the insertion medium to be limited for a selected post-processing apparatus and limiting selection of the insertion apparatus.

Image forming system and control method for the same

An image forming system is provided that alleviates throughput reductions and enables reductions in power consumption and lower noise. The image forming system includes an image forming apparatus that forms an image on a recording material and a plurality of sheet-conveying devices that convey the recording material. Furthermore, the image forming apparatus includes a storage unit configured to store connecting orders of the plurality of sheet-conveying devices and a determination unit configured to determine which of the sheet-conveying devices should be given notification by an operation start request or an operation end request according to designation information that designates the sheet-conveying device to which the recording material is conveyed and the connecting orders for the plurality of sheet-conveying devices. Further still, the image forming apparatus includes a transmitting unit configured to transmit an operation start request or an operation end request to each determined sheet-conveying device.

Image forming system, image forming apparatus, and control method thereof

An image forming apparatus/method transports a sheet to an image forming unit that can form images on both sheet sides. The sheet is fed to the image forming unit at a predetermined image formation start timing for the first side image formation, thereafter is reversed, and re-fed to the image forming unit for the second side image formation while the first side image-formed sheet waits at least one of sheet waiting positions. A full state, where all the sheet waiting positions are full of the first side image-formed sheets, is detected. The number of sheets transported is controlled so that it is greater than the number of the sheet waiting positions. When the full state is detected, the sheet re-feeding is controlled so that a head sheet among the first side image-formed sheets waiting at the sheet waiting positions is fed in advance of the predetermined image formation start timing.

Image forming apparatus and control method therefor that circulate sheets for duplex printing

An image forming apparatus capable of reducing damage in a fixing section and printing a high-quality image on a sheet at low cost without reducing productivity. A sheet shifting mechanism is arranged upstream of a transfer roller and moves the sheet in a sheet lateral direction orthogonal to the sheet conveying direction. In order to change a position at which a sheet passes through a fixing roller, the sheet shifting mechanism is controlled for every conveyance of a predetermined number of sheets, whereby sheet movement in the sheet lateral direction is controlled. A correction amount for an error due to sheet shifting by the sheet shifting mechanism is stored for each of sheet shift positions. An image forming position in the sheet lateral direction of a photosensitive drum is shifted on the basis of the sheet shift position and the stored correction amount.

Image forming apparatus with multiple lateral alignment positions

An image forming system executes image forming with pages kept continuous by controlling supplying of sheets corresponding to pages for which sheets have not fed in consideration of pages for which sheets have already been fed, even if image forming processing is temporally suspended.

Image forming system

An image forming apparatus which is capable of bringing processing devices, such as sheet feed devices and post-processing devices connected respectively to the image forming apparatus, into operable states in timing optimal for carrying out an image forming job, thereby improving productivity and operation rate of the image forming apparatus as well as saving energy. A print job is analyzed to determine at least one sheet feed device and at least one post-processing device to be used in executing the print job, and states of the determined devices are checked to determine at least one of the sheet feed device and the post-processing device to be caused to start a preparatory operation in advance before the print job is executed. Power supply to the at least one of the sheet feed device and the post-processing device is turned on in timing such that the preparatory operation is completed in time for the start of execution of the print job.

Image forming apparatus with sheet-handling device preparatory operation control

Timing information for use to determine the timing to discharge a sheet from an image forming apparatus is transmitted. The timing information is relayed, by being edited repeatedly, from a first sheet processing apparatus connected directly with the image forming apparatus to a second sheet processing apparatus which actually processes the sheet. The timing information is edited on each sheet processing apparatus by considering, for example, transit time of the sheet, processing time of the sheet, preparation time for the sheet to get ready to be processed, and the like. The second sheet processing apparatus transmits the timing information to the image forming apparatus. The image forming apparatus determines the discharge timing of the sheet based on the received timing information and discharges the sheet with the determined discharge timing.

An image forming apparatus is configured, in performing changing of a rotation speed of a scanner motor and forming of an image density adjustment patch in the same page interval, to change the rotation speed of the scanner motor before forming the image density adjustment patch.

An image forming apparatus determines process items needed as exchanged components and an order of executing the process items needed for a plurality of kinds of exchanged components based on priority order information of the process items and causes a display unit to control a display for ordering to execute process items needed for the components according to the determined order of execution.

Image forming apparatus that displays process information requiring execution relating to exchanged components,controlling method of the same

An image forming system that has an apparatus that receives recording media from an apparatus upstream from it, executes image formation processing, and conveys the recording media to an apparatus positioned downstream from it. The apparatus controls whether to continue conveyance of recording media, change their discharger, and accept recording media in accordance with condition of its own or the downstream apparatus regardless of the configuration of the entire system.

Growing community of inventors

Toride, Japan

Ichiro Sasaki