Canon Kabushiki Kaisha

Takayuki Iikura

Shinya Suzuki

Toshifumi Kakutani

Kazunori Miyake

Yousuke Hata

Kazumi Sato

Takeyuki Suda

Mitsuhiro Sugeta

Hirohisa Nakajima

Toshiyuki Abe

Manabu Koseki

Shuji Obata

Jiro Shirakata

Shusuke Miura

Toru Ikeda

Tomoya Sato

Yuya Hasegawa

Satoru Ikeda

Kanta Kumagai

Shinya Ikeda

A display control method for an image forming apparatus includes detecting that a document is placed on a document reading unit, determining, when it is detected that the document is placed on the document reading unit, whether the size of the document is a predetermined size, displaying a first function screen on a display when a first function capable of performing one of a plurality of functions accompanying a reading operation for a document placed on the document reading unit is performed, and displaying a second function screen to which a screen is switched from the first function screen and that is displayed when a second function created by modifying the first function based on a specific setting is performed, in a case where, while the first function screen is displayed, it is determined that the size of the detected document is not the predetermined size.

Image forming apparatus, display control method, and storage medium

An image forming unit includes a first receptor, a light source, a photosensitive member, a rotational polygon mirror, a light receiving unit, an identifier configured to identify a reflection face, and a generator. An information processing apparatus includes a second receptor, a first detector, a second detector, a determiner, a corrector configured to correct image data, and an output unit configured to output corrected image data to the image forming unit. When the first change is newly detected in a predetermined period, the determiner determines, based on a time period from the second timing at which the first change is newly detected to a timing at which the second change is detected and a time period from the first timing to a timing at which the second change is lastly detected before the second timing, whether the first change is a change corresponding to the identified reflection face.

Information processing apparatus and image forming apparatus

An image forming apparatus which can control to turn on/off a light emitting element depending on a sheet state on a manual sheet tray is provided. The image forming apparatus includes the manual feed tray on which the sheet is placed. The image forming apparatus is configured to be switchable between normal power mode and power saving mode. In the normal power mode, normal power is supplied. In the power saving mode, less power is consumed as compared to the power consumed in the normal power mode. The image forming apparatus includes a manual sheet feeding sensor which detects presence/absence of the sheet on the manual feed tray. The image forming apparatus includes a sheet length sensor S and a sheet length sensor L which include the light emitting element and a light receiving element to detect approximate sheet length of sheet placed on the manual feed tray in a conveying direction.

Image forming apparatus

An image forming apparatus includes an image forming portion; a discharge portion configured to discharge a recording material on which an image is formed by the image forming portion, wherein a delivery conveyance portion having a power source circuit is mountable in a space adjacent to the image forming portion and configured to convey the recording material to a post-processing apparatus; a detection unit configured to detect a temperature; a cooling unit configured to cool the image forming portion; and a control unit configured to control, in a case where the delivery conveyance portion is mounted, rotation of the cooling unit based on the temperature detected by the detection unit in a standby state in which an image forming operation is not performed.

Image forming apparatus and image forming system

An image forming apparatus includes a developing unit configured to develop an electrostatic latent image, a mounting detection unit configured to detect that a container T is mounted on a mounting unit, a driving unit configured to rotate the container T, a rotation detection unit configured to detect rotation information about the container T, and a controller configured to control the driving unit based on the rotation information. If the container T is detected to be mounted on the mounting unit, control of the driving unit is not carried out based on the rotation information until replenishment information satisfies a predetermined condition.

Image forming apparatus including a developing unit to develop an electrostatic latent image on a photosensitive member

An image forming apparatus including: an image formation unit including an accumulation unit accumulating toner, and forms an image based on image data using the accumulated toner; a measurement unit measures toner density of an developer in the accumulation unit; a replenishment unit replenishes toner to the accumulation unit from an attached container; a first determination unit determines a first value based on the image data; a second determination unit determines a second value based on the measurement result of the measurement result; a third determination unit determines a third value by accumulating the second value; and a controller controls the replenishment unit based on the first value, the second value, and the third value, wherein in a case where the container has been replaced, the third determination unit changes the third value into a predetermined value before the difference is determined by the second determination unit.

Image forming apparatus and control method of image forming apparatus to replenishment control of toner

An image forming apparatus includes a developing unit configured to develop using toner an electrostatic latent image formed on a photosensitive member, a mounting unit to which a container is mounted, the container including a containing unit configured to contain toner and a pump unit, and performing a supplying operation for supplying toner by expansion and contraction of the pump unit, a driving unit configured to rotationally drive the container to cause the container to perform the supplying operation, and a controller configured to control a rotational speed of the container based on a time for which the supplying operation has been performed.

A sheet feeding apparatus includes a stacking member, an optical sensor, a detected member, and a control unit. As an amount of sheets stacked on the stacking member decreases, the detected member moves from a first position in which optical sensor light is not interrupted, then once interrupts the light, and then moves to a second position in which the light is not interrupted. Information regarding an amount of sheets transmitted by the control unit, when stored information is about the detected member in the second position, is information notifying that an amount of sheets stacked on the stacking member is less than that of information regarding an amount of sheets stacked on the stacking member transmitted by the control unit when stored information is about the detected member is in the first position.

Sheet feeding apparatus and image forming apparatus

An image forming unit forms a toner image on an image carrier, and transfers the toner image to a recording medium. A voltage generation circuit generates a high voltage used for the image forming unit. A control circuit is connected to the voltage generation circuit via a cable, and controls the high voltage generated by the voltage generation circuit. A detection unit detects a current flowing in a load of the image forming unit to which the high voltage generated by the voltage generation circuit is applied. A determination unit determines an error in accordance with a current range in which the current detected by the detection unit falls. The current range is included among a plurality of current ranges that are in one-to-one correspondence with a plurality of errors.

Image forming apparatus that forms image on image carrier

An image forming apparatus including: a reading device; an operating portion; a light source; a rotary polygon mirror; a motor configured to rotate the rotary polygon mirror; and a motor control portion configured to start the motor to control the motor at a first rotation speed in response to a fact that a predetermined action is performed on one of the operating portion and the reading device in a stopped state of the rotary polygon mirror, and then to control the motor at a second rotation speed higher than the first rotation speed in response to an instruction to start image formation from the operating portion, the motor control portion being configured to control the motor at the second rotation speed, without controlling the motor at the first rotation speed, in response to a fact that the receiving portion receives image data before the motor reaches the first rotation speed.

Image forming apparatus with rotary polygon mirror speed control

An image forming apparatus including a replaceable container having toner stored therein includes: an image forming unit including an accumulating unit for accumulating developer containing toner and configured to form an image by using the developer in the accumulating unit; a measurement unit configured to measure a toner density in the accumulating unit; a portion to which the container is attached; a supplementing unit configured to supplement the toner from the attached container to the accumulating unit; and a controller configured to control the supplementing unit based on first information corresponding to a difference between the toner density and a target toner density and second information corresponding to an accumulated value obtained by accumulating differences, wherein the second information does not change in a period from replacement of the container by another container until a predetermined number of times of supplement is performed.

Image forming apparatus supplying toner from container to accumulating unit based on tower density developer in the accumulating unit, and method of controlling image forming apparatus

An image forming apparatus detecting container's dismounting. A drive unit rotates the container for replenishing toner to a development unit. An output unit outputs a first signal while a predetermined portion of the container is detected, and outputs a second signal while the predetermined portion is not detected. A decision unit decides a count of changes from the second signal to the first signal based on a toner replenishing amount. A detection unit detects dismounting of the container in a case where the first signal is changed to the second signal during not rotating. The controller stops the rotation in a case where the count of changes reaches the count decided, controls the drive unit to output the first signal in a case where containers should be exchanged, and does not control the drive unit to output the first signal in a case where containers should not be exchanged.

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Kashiwa, Japan

Takayuki Iikura