Canon Kabushiki Kaisha

Shimpei Ishikawa

Shuichi Tetsuno

Toshihiko Takayama

Shinsuke Kobayashi

Kenichi Iida

Junichi Sekiyama

Jun Hara

Shuhei Tokiwa

Shunsuke Matsushita

Keisuke Fujita

Gen Kitamura

Marehiko Hirajima

Mikihiko Hamada

Dai Naito

An image forming apparatus to perform an image forming operation for forming an image on a transfer material includes a photosensitive drum, a moving member, a detection unit, and a control unit. The detection unit detect information about a first movement in which the moving member moves from an open position to a shielding position or a second movement in which the moving member moves from the shielding position to the open position. During execution of a non-image forming operation, the control unit executes a multiple switching operation for performing a switching operation a plurality of times. The switching operation is an operation in which the control unit stops the photosensitive drum from being driven and then rotatably re-drives the photosensitive drum. Where the detection unit detects the information about the first movement or the second movement, the control unit performs control to execute the multiple switching operation.

Image forming apparatus

An image-forming apparatus to execute an image-forming operation includes an image bearing member, a charging member to charge at a charging portion a surface of, and a developing member to supply at a developing portion toner to, the image bearing member. When a rotating image bearing member stops rotating, a surface potential of the image bearing member formed on the developing portion is defined as V, a developing voltage applied to the developing member is defined as V, a charging voltage applied to the charging member is defined as V, and a surface potential of the image bearing member formed on the charging portion is defined as V. A first potential difference, which is a potential difference between Vand V, and a second potential difference, which is a potential difference between Vand V, are controlled based on information about a number of execution times of the image-forming operation.

Image-forming apparatus to control potential difference based on image-forming operation

An image forming apparatus including: a container unit configured to contain a recording material; an image forming unit configured to perform image formation onto the recording material conveyed from the container unit; a control unit configured to perform a preparatory operation for the image formation at an image forming speed before the image forming unit performs the image formation onto the recording material; and a first detection unit configured to detect a size of the recording material contained in the container unit, wherein the control unit is configured to judge whether to execute the preparatory operation based on the size of the recording material detected by the first detection unit.

Image forming apparatus for conveying a recording material to perform an image forming operation

An image pickup apparatus that is capable of improving heat dissipation while reducing a cost and securing reliability of flange back. The image pickup apparatus includes a lens mount to which a lens unit is attachable, and a housing that is formed by inserting a metal member into a resin member and that has a mount portion to which the lens mount is attached. The metal member has a first planar portion that is perpendicular to an optical axis of the lens unit and a second planar portion including at least one planar plate that is bent in an optical axis direction from the first planar portion. The at least one planar plate is inserted into the mount portion.

Image pickup apparatus capable of improving heat dissipation

An image stabilizing apparatus includes a first wireless communication unit, a second wireless communication unit configured to communicate with the first wireless communication unit and disposed to face the first wireless communication unit, a first substrate mounted with the first wireless communication unit, a second substrate mounted with the second wireless communication unit, a third substrate provided opposite to the first substrate with respect to the second substrate in an optical axis direction and mounted with an image sensor, and an electromagnetic shield member provided between the second substrate and the third substrate. The image stabilizing apparatus provides an image stabilization by moving the second and third substrates relative to the first substrate in planes formed in directions different from the optical axis.

Image stabilizing apparatus and image pickup apparatus

A transmission unit transmits driving force to be supplied from a motor to a roller pair. A switching unit acts on the transmission unit to switch a rotation direction of the roller pair by the driving force between a normal rotation and a reverse rotation. A control unit controls a rotation speed of the motor to convey the sheet at a second conveyance speed in a part of a first time period. The second conveyance speed is lower than a first conveyance speed. The first conveyance speed is a conveyance speed when the sheet is conveyed in the image forming unit. In the first time period the sheet having the image formed on the first surface is conveyed in a first direction. In a second time period the sheet is conveyed in a second direction.

Image forming apparatus that can form images on both sides of sheet by inverting sheet

A heating member of a fixing unit is situated in a fixing portion, and a commercial power source applies an alternating-current voltage to the heating member so that the heating member heats a transfer medium held in the fixing portion. In a case of transferring the toner image from an image bearing member onto the transfer medium in a transfer portion, a control unit controls a transfer power source based on a result of a comparison between a frequency obtained from a first detection result input from a detection unit with a predetermined frequency range including the frequency of the alternating-current voltage.

Image forming apparatus controlling transfer power source based on detection result of detection unit connected to transfer portion

A control unit can execute regulation control referred to as active transfer voltage control (ATVC) for setting a transfer voltage output from a second voltage unit to a transfer member so as to transfer a toner image from a photosensitive member to a transfer material based on an electric current value detected by a detection unit and a voltage value output from a voltage output unit. When changing a voltage value output from the voltage output unit during execution of the ATVC, the control unit interrupts execution of a predetermined operation of the ATVC in a predetermined time period including a point of time including when the voltage output from the voltage output unit is changed.

Growing community of inventors

Kawasaki, Japan

Shimpei Ishikawa