Canon Kabushiki Kaisha

Shun-ichi Ebihara

Tsutomu Ishida

Norio Matsui

Shoichi Koyama

Tomonori Shida

Hiroshi Kita

Tomoharu Nakamura

Masahiro Suzuki

Ken Yokoyama

Mahito Yoshioka

Masatake Usui

Michio Sugano

Satoshi Saito

Tatsuya Kobayashi

Hiroshi Kataoka

Yoshiro Saito

Masahide Hirai

Kuniaki Kasuga

Tetsuichiro Fujimoto

Kentaro Yamashita

Toshiaki Sako

Yu Izaki

A diagnostic system may comprise an image forming apparatus that forms a diagnostic image on a sheet and an image capturing apparatus that captures an image of the sheet on which the diagnostic image is formed and which has been discharged from the image forming apparatus, and outputs the image captured as a sheet image. The image capturing apparatus may make a diagnosis for a component of the image forming apparatus based on a position of an image deficiency in the sheet image, and output a diagnosis result for the component of the image forming apparatus.

Diagnostic system for diagnosing image forming apparatus using image formed by image forming apparatus

An image forming system includes a first image forming apparatus and a second image forming apparatus connected with the first image forming apparatus by a network line. When a second stacking portion of the second image forming apparatus is associated with a first stacking portion of the first image forming apparatus by a setting portion, an arithmetic portion acquires information related to the characteristic of a second recording medium stacked by the second stacking portion via the network line and obtains a degree of deterioration of a feeding rotatable member of the first image forming apparatus based on the acquired information related to the characteristic of the second recording medium.

Image forming apparatus and image forming system

An image forming apparatus includes an image bearing member configured to bear a non-fixed toner image, a transfer portion configured to transfer the non-fixed toner image onto a sheet at a transfer nip, a fixing portion including a first rotary member, a second rotary member and a heating portion configured to heat the first rotary member, a control portion configured to execute a nip image forming process of forming a nip image, on the sheet, corresponding to a shape of the fixing nip, and a reading unit configured to read the nip image, wherein the control portion sets the heating portion to a first temperature in a case where the non-fixed toner image passes through the fixing nip and sets the heating portion to a second temperature which is lower than the first temperature in a case where the nip image passes through the fixing nip.

Image forming apparatus that can form a nip image corresponding to a fixing nip shape

An image forming apparatus includes an image forming unit, a control unit, a reading unit, an analysis unit, a storage unit, and a computation unit. The image forming unit forms an image on a sheet. The control unit controls the image forming unit. The reading unit reads the sheet. The analysis unit analyzes a reading result acquired by the image formed on the sheet being read by the reading unit, and outputs an analysis result. The storage unit stores a printing condition used when the image was formed and the analysis result in association with each other. The computation unit computes a control parameter to be used by the control unit in order to control the image forming unit, with reference to the analysis result and the printing condition stored in the storage unit.

Technology for ascertaining state of members constituting image forming apparatus

An image forming apparatus sets, on an image forming unit, one of a first transfer condition that does not cause an image to be formed on a sheet and a second transfer condition that causes an image to be formed on the sheet. The apparatus generates a first reading result by reading the sheet that has passed through the image forming unit set in the first transfer condition, and generates a second reading result by reading the sheet that has passed through the image forming unit set in the second transfer condition. The apparatus detects toner fogging based on the first reading result and a reading result out of the second reading result, the reading result concerning a non-image region in which no image is formed on a surface of the sheet.

Image forming apparatus that detects toner fogging

In an image forming apparatus, a first conveyance part conveys a sheet, a detection unit detects a leading edge of the sheet conveyed by the first conveyance part, a second conveyance part is provided downstream of the detection unit in a conveyance direction of the sheet and conveys the sheet, a measurement unit measures a conveyance time of the sheet from when conveyance of the sheet by the first conveyance part is started until the leading edge of the sheet is detected by the detection unit, and an estimation unit estimates a remaining lifetime of the second conveyance part based on the conveyance time measured by the measurement unit.

Method of estimating lifetime of conveyance part provided in image forming apparatus

An image forming apparatus includes a feeding unit for feeding a recording material, and a calculating unit for calculating a degree of deterioration of the feeding unit, while making correction depending on stiffness of the recording material and a content of a filler contained in the recording material.

Image forming apparatus and management system

Provided is an image forming apparatus including a process unit that is used for an image forming operation for forming an image on a sheet and detachable from a main body of the image forming apparatus, a storage unit that stores operation history information indicating an operation history of the process unit, a detection unit that detects that the process unit is replaced with a new process unit, and a determination unit that determines a replacement timing of the new process unit on a basis of the operation history information of the process unit.

Image forming apparatus

An image forming apparatus includes a stacking portion, a feeding unit, an image forming unit, a storing unit, an inputting unit for inputting paper kind information of the recording material, and a calculating unit. When the paper kind information of the recording material inputted by the inputting unit is different from paper kind information of the recording material stored in the storing unit, the image forming unit forms the image on the recording material in an image forming condition determined on the basis of the paper kind information of the recording material inputted by the inputting unit, and the calculating means calculates the degree of deterioration of the feeding unit depending on the paper kind information of the recording material stored in the storing unit.

Image forming apparatus and management system for calculating a degree of deterioration of a fixing portion

A fixing apparatus including: an acquiring portion that acquires a difference value between a detection temperature of a first temperature detecting member and a detection temperature of a second temperature detecting member; and an alarming portion that sends a notification of an abnormality in the apparatus. The alarming portion sends the notification of an abnormality in the apparatus according to an amount of change in the difference value acquired during a fixing process.

Fixing apparatus

An image forming apparatus includes first and second feeding units for feeding a recording material while nipping the recording material; a guiding member for guiding the recording material passed through the first feeding unit toward the second feeding unit; a measuring unit for measuring a time required for the recording material to pass from a first point to a second point provided downstream of the first point with respect to a recording material feeding direction; and a discriminating unit for discriminating stiffness of the recording material on the basis of a measurement result of the measuring unit. The guiding member is flexed and is in a non-overlapping state with a virtual line connecting a first nip where the first feeding unit nips the recording material and a second nip where the second feeding unit nips the recording material.

Image forming apparatus with function for determining recording material stiffness

A spectral color sensor including a spectroscopic unit that disperses reflected light from a measurement target, and a light detection element that detects the dispersed light from the reflected light, comprises: a storage unit that stores a correspondence relationship between a pre-measured wavelength of the dispersed light projected on the light detection element and a projection position, as well as a stray light component; a first correction unit that, based on a measurement result when a color is measured, corrects the correspondence relationship between the wavelength of the dispersed light projected on the light detection element and the projection position stored in the storage unit; and a second correction unit that carry out wavelength correction on the stray light component stored in the storage unit using the corrected correspondence relationship between the wavelength and the projection position.

Spectral color sensor and image forming apparatus

The color measurement device and an image forming apparatus using the same includes a light source for irradiating a color measurement object with white light; a diffraction grating for dispersing the light reflected from the color measurement object; and a line sensor formed of multiple pixels that generate an electric signal corresponding to the intensity of the light dispersed by the diffraction grating, wherein the light source includes a light-emitting diode having a peak value of emission intensity in a wavelength zone of 380 nm to 420 nm, and a plural types of fluorescent members each having a peak value of fluorescence intensity in a wavelength zone of 420 nm to 730 nm.

Color measurement device and image forming apparatus

By providing a step in a pressing member for pressing a recording material P to a reading surface of an image-pickup unit, surface images in a tight contact area and a non-tight-contact area are picked up. By identifying the type of the recording material P based on the two surface images, the accuracy of identifying the recording material is improved without using a plurality of sensors.

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Suntou-gun, Japan

Shun-ichi Ebihara