Canon Kabushiki Kaisha

Tatsuomi Murayama

Haruhiko Omata

Sumito Tanaka

Sho Ikemoto

Akihiro Noguchi

Isami Itoh

Yuichiro Toyohara

Riki Fukuhara

Masanori Shida

Hiroyuki Eda

Fumitake Hirobe

Hiromi Shimura

Yuya Ohta

Shin Iwasaki

Yasuki Kamimori

Rumi Konno

Yuko Kiyota

Yuga Yamauchi

Takeshi Menjo

Motohide Shiozawa

Jiro Ishiduka

An information processing apparatus, which communicates with an image forming apparatus and a reader, including: a display; and a controller configured to: obtain read image data output from the reader; determine an error of the read image data based on the read image data and reference data; cancel image forming operation of the image forming apparatus in a case where the error is determined in succession a predetermined number of times; cancel reading operation of the reader in the case where the error is determined in succession the predetermined number of times; notify, on the display, the cancellation of the image forming operation and the reading operation in the case where the error is determined in succession the predetermined number of times; and receive a user's instruction information about the predetermined number of times.

Information processing apparatus with automatic detection and interruption of defective image forming operations

An image forming apparatus includes an image processor configured to convert image data based on a first conversion condition; an image forming unit configured to form an image on a sheet based on the image data converted by the image processor, the image forming unit having an image bearing member on which the image is to be formed, a transfer unit configured to transfer the image from the image bearing member onto the sheet, and a fixing unit configured to fix the image to the sheet; a conveyance roller configured to convey the sheet having the image fixed thereto; a reading unit configured to read a pattern image on the sheet conveyed by the conveyance roller; and a detector configured to detect a pattern image on the image bearing member.

Image forming apparatus

An image forming apparatus includes an image bearing member, an image transfer device for transferring a toner image from the image bearing member to a sheet, an application device for applying a transfer voltage to the image transfer device, and a controller for controlling an output mode operation for outputting a predetermined chart in which test halftone toner images transferred with different transfer voltages are formed to adjust the transfer voltage. When outputting a maximum size of the chart, the controller forms the test toner images in a region within 50 mm from an edge in a width direction perpendicular to a feeding direction of the sheet.

Image forming apparatus outputting plural test toner images for use in adjusting transfer voltage

An image forming apparatus includes a controller configured to control a first and a second voltage applied to a transfer device when transferring an image to a first and a second side of a recording material, respectively. The controller controls a mode that outputs a test chart on which at least one of a plurality of first test images for adjusting the first voltage and a plurality of second test images for adjusting the second voltage is formed. In a case of forming the second test images on a second side of the test chart, and before forming the second test images, the controller forms a plurality of predetermined toner images under a same image forming condition on a first side of the test chart so that the predetermined toner images are formed on a plurality of predetermined areas overlapping each area where the second test images are to be formed.

Image forming apparatus using test chart for adjusting transfer voltage

In an image forming apparatus including a pressing member arranged on an inner circumferential surface of an intermediate transfer belt, configured to correct a position of the intermediate transfer belt in the width direction to be fit within a movable region, positions of both ends of the pressing member in the width direction are respectively arranged outside positions of both ends of the movable region.

Image forming apparatus having deviation suppression mechanism for intermediate transfer belt

An image forming apparatus includes an intermediary transfer member, a toner image forming unit, a rotatable transfer member, a cleaning unit, a feeding unit, a feeding portion and an executing portion configured to execute a supplying operation for supplying a supplying toner image to a cleaning portion. The executing portion forms the supplying toner image at a position including a position different from a position where an adjusting toner image for adjusting an image forming condition is formed, with respect to a widthwise direction crossing a movement direction of an intermediary transfer member provided in contact with the rotatable transfer member. The executing portion performs the supplying operation at least one time in a double-sided image forming job and does not perform the supplying operation in a single-sided image forming job.

When a drive roller is at a stopped state, an execution portion executes a move mode in which a time from when a rotation of a drive roller has been stopped is measured, and based on the measured result, rotation of the drive roller is started and stopped. In the move mode, a portion of a secondary transfer belt having been at a first contact position in the stopped state is moved to a position other than the first contact position and the second contact position, and the rotation of the drive roller is stopped.

An image forming apparatus includes a movable intermediary transfer member, a toner image forming unit, a rotatable transfer member, a fixing unit, a recording material feeding portion, an executing portion, and first and second cleaning units. The first cleaning unit includes a first brush roller, a first rotatable member and a first blade member. The second cleaning unit includes a second brush roller, a second rotatable member, a second blade member and a third blade member. The third blade member is disposed downstream of the cleaning portion and upstream of a contact portion, between the second rotatable member and the second brush roller, with respect to a rotational direction of the second rotatable member, and scrapes a deposited matter off the second rotatable member with the rotation of the second rotatable member.

Transfer apparatus having pressing member for transfer belt

Relationships of LB1&#x3e;LR1 and LN1&#x3c;LN2 are satisfied, where LB1 is a length of a first contact area in which a first brush roller and an endless belt come into contact with each other. LR1 is a length of a second contact area in which the first roller and the endless belt come into contact with each other. LN1 is a length of an area in which the first contact area and the second contact area overlap with each other. A third contact area is an area in which the second brush roller and the endless belt come into contact with each other. A fourth contact area is an area in which the second roller and the endless belt come into contact with each other. LN2 is a length of an area in which the third contact area and the fourth contact area overlap with each other.

A controller measures a stop duration time when an intermediate transfer belt and a secondary transfer belt are stopped, and based on a measurement result, rotates and stops the intermediate transfer belt such that the stretched position by stretch rollers of the intermediate transfer belt is changed. At the same time, the controller rotates and stops the secondary transfer belt such that a stretched position by stretch rollers of the secondary transfer belt is changed. A time from starting to stopping the rotation of the intermediate transfer belt and a time from starting to stopping the rotation of the secondary transfer belt are overlapped.

An image forming apparatus includes: an image bearing member; an image forming portion; an intermediary transfer member; a transfer member; an executing portion capable of executing a first mode in which a transfer voltage based on a current detected when a predetermined voltage is applied to the transfer member is applied to the transfer member and capable of executing a second mode in which a transfer voltage is applied to the transfer member to provide a predetermined constant-current; and a controller enabling transition between a stand-by state where the image formation is enabled and a sleep state less than in power consumption than the stand-by state. The controller executes the first mode in a job after main switch actuation and before the transition to the sleep state, and executes the second mode in an initial job after the transition from the sleep state to the stand-by state.

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Abiko, Japan

Tatsuomi Murayama