Canon Kabushiki Kaisha

Naoka Omura

Kiyoharu Kakomura

Yuya Ohta

Takuya Hayakawa

Seita Inoue

Noriaki Matsui

Takayuki Inoue

Shunsuke Nishimura

Kuniyasu Kimura

Junichiro Nakabayashi

Nozomi Kumakura

Satoru Kojima

Toshiyuki Miyake

Satoru Yamamoto

Koichi Taniguchi

Daisuke Aruga

Koji Yumoto

Yasuhito Shirafuji

Katsuya Nakama

Ryuichi Araki

Kunio Takane

Provided is a technology relating to an image forming apparatus configured to calculate a toner usage amount per day. The image forming apparatus stores the calculated toner usage amount per day in a list when a toner usage history is permitted to be stored, and avoids storing the calculated toner usage amount per day in the list when the usage history is inhibited from being stored. When the toner usage history is permitted to be stored, the image forming apparatus extracts a feature amount indicating a toner consumption tendency exhibited by a user based on the toner usage amount per day corresponding to a predetermined period stored in the list, and avoids extracting the feature amount when the toner usage history is inhibited from being stored.

Information processing apparatus that enables communication with image forming apparatus that has consumable and control method for image forming apparatus that has consumable

An information processing apparatus that is capable of improving estimating accuracy of a usable period of a fixing device. The information processing apparatus enables communication with an image forming apparatus to which one of fixing devices is selectively attachable. A controller obtains information about a type of a fixing device attached, determines a remaining period of a second fixing device based on second data about a consumption amount of the second fixing device in a case where a first fixing device of a first type is replaced with the second fixing device of a second type, and determines a remaining period of a third fixing device based on first data about a consumption amount of the first fixing device and third data about a consumption amount of the third fixing device in a case where the first fixing device is replaced with the third fixing device of the first type.

Information processing apparatus that enables communication with image forming apparatus to which fixing devices of different types are selectively attachable, image forming apparatus, and control method therefor

An image forming system comprises an image forming apparatus for forming an image on a sheet and a sheet processing apparatus for performing binding processing on a sheet bundle formed of a plurality of sheets having formed the image. The sheet processing apparatus performs binding processing by a stapler on the sheet bundle placed on an intermediate tray and an opening. The image forming apparatus controls image forming preparation and timing of movement of the stapler in accordance with presence/absence of the sheet bundle on the opening, position of the stapler and timing to obtain an image forming instruction including binding processing.

Image forming apparatus, image forming method and sheet processing apparatus

An image forming apparatus is capable of easily performing jam processing. When an occurrence of a jam of a sheet which is conveyed on a conveying path is detected, the image forming apparatus displays a jam processing display screen which guides processing in accordance with a position where the jam has occurred. After the processing in accordance with the jam processing display screen is performed, if a state of the jam remains unchanged, the image forming apparatus performs forced feeding, which forcibly conveys the sheet to a predetermined position. The image forming apparatus displays the jam processing display screen urging to perform processing in accordance with the position of the sheet after the sheet is forcibly conveyed.

Image forming apparatus, jam processing method

An image forming apparatus () is capable of continuing, when detecting running out of sheet in a cassette () during image formation, the image formation by performing switching to another cassette (). When it is determined that sheets are run out based on a signal supplied from a sheet sensor () of a cassette being used after exposure is started based on image data of a certain page, cleaning is performed on a secondary transfer roller () and exposure is started based on the image data of a target page before the cleaning is terminated.

Image forming apparatuses employing an electrophotographic method

A controller of an image forming apparatus calculates a density difference between a measurement result of a toner image having the highest density formed on a photosensitive drum, which is obtained by an image density sensor, and the highest density of a density target. When the density difference falls within a predetermined range, the controller generates a tone correction table based on a density value of a first toner image formed with a plurality of densities including the highest density, and sets, based on the density difference, an exposure amount of laser light to be applied to the photosensitive drum by an exposure device. When the density difference falls out of the predetermined range, the controller generates the tone correction table based on a density value of a second toner image having a larger number of tone levels than that of the first toner image.

Image forming apparatus

An image forming apparatus including a controller, which starts rotation of a rotary polygon mirror when a predetermined condition is satisfied, rotates the rotary polygon mirror at a predetermined rotation speed based on a first pulse in a first state in which light beams are not emitted from a light source, thereafter starts emission of the light beams, switches a rotation control based on the first pulse to a rotation control based on the second pulse, and rotates the rotary polygon mirror at the predetermined rotation speed based on the second pulse in a second state in which the light beams are emitted from the light source, and thereafter detects a temperature of a drive circuit board by a temperature detector, and corrects color misregistration using a detected temperature of the temperature detector and the detection result of a pattern detector.

An image forming apparatus includes a plurality of image forming units configured to form images, an image bearing member, a detection unit configured to detect a pattern image formed on the image bearing member, the pattern image being used for detecting a color misregistration, a controller configured to control the plurality of image forming units to form a plurality of first pattern images, each having a different color, and control the detection unit to detect the color misregistration, and a storage unit configured to store data on the color misregistration, wherein the controller corrects an image forming position based on the stored data, and wherein in a case where an error is detected in the data, the controller controls the plurality of image forming units to form a plurality of second pattern images, different form the plurality of first pattern images, before the plurality of first pattern images is formed.

Image forming apparatus configured to detect color misregistration and method controlling image forming apparatus configured to detect color misregistration

Provided is an image forming apparatus, which is capable of detecting a color misregistration amount with high accuracy even when a density characteristic thereof is changed. The image forming apparatus includes a plurality of image forming units configured to form toner images of different colors on a predetermined intermediate transfer belt, and a density sensor configured to measure densities of the toner images formed on the intermediate transfer belt. The image forming apparatus determines a density target depending on a measurement result of a density correction image, which is formed by the plurality of image forming units, from the density sensor. The image forming apparatus causes the plurality of image forming units to form position detection images so that the position detection images have densities corresponding to the density target.

An image forming apparatus which performs an adjustment operation at appropriate timing. Whether to execute a first or a second adjustment processes is controlled based on the number of sheets on which images are formed. A first adjustment operation is executed in a case where the number of sheets has reached a first number since a previous first adjustment process was executed. A second adjustment operation is executed in a case where the number of sheets has reached a second number since a previous second adjustment process was executed. The first adjustment operation is executed in a case where the number of sheets has reached the first number prior to a designated time by a predetermined period. The second adjustment operation is skipped in a case where the number of sheets has reached the second number prior to the designated time by the predetermined period.

Image forming apparatus having timer function related to power consumption modes

An image forming apparatus includes a first image forming unit configured to form a first image in a chromatic color, a second image forming unit configured to form a second image in black, an intermediate transfer member, a sensor, a first adjustment unit configured to adjust the image forming position for the black based on an adjustment value, a second adjustment unit configured to adjust image forming position based on an adjustment condition, and a generation unit configured to generate the adjustment condition. The generation unit generates a first adjustment condition based on a user instruction relating to a first test image having chromatic color on a sheet input from the input unit. The generation unit generates a second adjustment condition based on the reading result of the second test image having black on a sheet from a reading device.

Image forming apparatus for adjusting position of image formed on sheet

The image forming apparatus controls each laser scanner by setting the writing start timing in the sub-scanning direction to form the color registration correction image for correcting color registration at position according to the detection result of the image detection sensor. When forming the image on the sheet, the image forming apparatus sets the writing start timing in the sub-scanning direction according to the detection result of the image detection sensor and the amount of skew of the sheet to control each laser scanner. When forming the density detection toner image for correcting the density, the image forming apparatus sets the writing start timing in the sub-scanning direction to form the image at a position shifted by a pixel unit from the image forming position on the sheet.

Image forming apparatus and image forming method

A detection unit detects a color registration pattern formed on a transfer member. A first correction unit detects an amount of color misregistration, relative to a forming position of a color pattern having a reference color, of a forming position of a color pattern having another color and determines an offset value for adjusting a write start timing of the other color. A measuring unit measures the inclination of the transfer member. A second correction unit determines, according to the inclination, an offset value for adjusting the write start timing of each of the plurality of image forming units and for adjusting, relative to the write start timing of a reference color, the write start timing of another color. The reference color for the first correction unit is different from the reference color for the second correction unit.

Image forming apparatus for adjusting write start timing of multicolor image

An image forming apparatus determines a time length of a non-image-forming period in which image formation is not performed, the non-image-forming period being from when image formation on one recording sheet ends to when image formation on the next recording sheet starts, and based on the determined time length, decides the number of times of executing measurement (BD interval measurement) of a generation timing difference between detection signals corresponding to light beams emitted from two light emitting elements. The image forming apparatus executes the decided number of times of BD interval measurement and calculates an average value of the resultant measurement values.

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Matsudo, Japan

Naoka Omura