Canon Kabushiki Kaisha

Ist Corporation, Limited

Mahito Yoshioka

Munehito Kurata

Daizo Fukuzawa

Kuniaki Kasuga

Masahide Hirai

Tomonori Sato

Masahiro Suzuki

Takashi Yano

Hiroshi Kita

Satoshi Saito

Yasuhiro Shimura

Masaki Hirose

Masaaki Takahashi

Akira Kato

Noriaki Sato

Tooru Imaizumi

Satoru Taniguchi

Taisuke Minagawa

Hirohiko Aiba

Takashi Honke

Satoru Izawa

Yasumasa Ohtsuka

Hiromitsu Kumada

Ken Nakagawa

Hideyuki Yano

Keita Nakajima

Toshihiko Ochiai

Shun-ichi Ebihara

Kazushi Nishikata

Fumiki Inui

Akira Hayakawa

Atsunobu Mori

Toshifumi Kitamura

Yasumasa Otsuka

Kenji Karashima

Yoji Tomoyuki

Satoru Koyama

Yoshimichi Ikeda

Akira Kuroda

Kazuo Kishino

Hiroshi Kataoka

Hideo Kawamoto

Toru Imaizumi

Yoshiro Saito

Kenichi Ogawa

Yasunari Watanabe

Shinji Hashiguchi

Yuki Nishizawa

Keisuke Mochizuki

Hikaru Osada

Hisashi Nakahara

Nobukazu Adachi

Teruhiko Namiki

Yuji Kitano

Yuuji Takayama

Yuji Mitsui

Takeshi Niimura

Manabu Takano

Yohji Tomoyuki

Masaki Shimomura

Hikaru Uchidate

Tetsuichiro Fujimoto

Shizuma Nishimura

Naoki Fuei

Koji Uchiyama

Kentaro Yamashita

Osamu Soutome

Seietsu Miura

Masafumi Matsumura

Kohei Haematsu

Osamu Mukataka

Kenta Inaba

Naoki Konishi

A fixing apparatus includes a rotatable fixing member, a rotatable pressurizing member, a heating portion, and a circuit portion including a contact member and configured to remove electric charge from the fixing member, the contact member being in contact with the fixing member. A surface layer of the pressurizing member is electrically connected to the circuit portion via a surface layer of the fixing member. In a case where a surface resistivity of the surface layer of the pressurizing member is represented by X (Ω/□) and a surface resistivity of the surface layer of the fixing member is represented by Y (Ω/□), 4.0≤log X≤13.0, 5.0≤log Y≤14.0, log Y≥13.0−log X, and log Y≤23.0−log X are satisfied.

Fixing apparatus and image forming apparatus

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 apparatus includes an image forming unit configured to form an image on a recording material based on first image data; a controller configured to control an image forming operation by the image forming unit; an acquisition unit configured to acquire property information related to a property of the recording material; a setting unit configured to set a control value to be used in the image forming operation; a reader configured to read an image formed on the recording material by the image forming unit and to output second image data; and a comparison unit configured to compare the first image data to the second image data, wherein the setting unit is further configured to set the control value based on a comparison result from the comparison unit and the property information.

Image forming apparatus configured to set control value

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 including a facing portion provided at a position facing a surface of an image bearing member that corresponds to a portion between a transfer unit and a cleaning unit, wherein a first space for conveying the recording material from the transfer unit to the fixing unit, and a second space between the surface of the image bearing member and the facing portion are formed in the image forming apparatus, and wherein the image forming apparatus includes a block member positioned in the second space and having one end side fixed to the facing portion on a side closer to the first space, the block member being configured to block a flow of an air current, the block member having the other end side in contact with the image bearing member.

Image forming apparatus with block member in contact with image bearing member for blocking airflow

An image forming apparatus includes an image forming portion configured to form a toner image on a recording material, a fixing portion configured to heat and to fix the toner image formed on the recording material, and a controller configured to control the apparatus, which is operable to form an image on a recording material having a first size and a recording material having a second size smaller than the first size in a direction perpendicular to a recording material feeding direction. If a printing instruction for printing on the recording material of the first size is received while continuously printing on the recording material of the second size at a first throughput, the controller controls the apparatus so as to print on the recording material of the second size at a second throughput, lower than the first throughput, before printing on the recording material of the first size.

Image forming apparatus having a controller that changes a throughput of a recording material of a size if the apparatus receives a printing instruction for printing on a recording material of another size

The fixing apparatus includes a cylindrical heating film, a nip portion forming member, a roller; a motor, a control unit, and an acquisition unit. The apparatus executes a fixing process of conveying and heating the recording material carrying the toner image to fix the toner image to the recording material at the nip portion. The apparatus is further configured to execute a first mode of stopping the supply of power to the motor just after the end of the fixing process and a second mode of stopping the supply of power to the motor after a low-speed rotation period for rotating the motor at a rotational speed set lower than the target rotational speed during the fixing process after the end of the fixing process, and to select one of the first and second modes.

Fixing apparatus the fixes an image on recording material and performs motor control after fixing the image

A fixing device for fixing an image formed on a recording material onto the recording material. The fixing device includes a heater contacting an inner surface of the film, a supporting member for supporting the heater, the supporting member being provided in a hollow space, a first portion for preventing lateral movement of the film in a generatrix direction of the film, the first portion being supported by a frame of the fixing device and holding the supporting member, and a second portion opposed to a surface of the heater where the heater contacts the film and elongated along a widthwise direction of the heater, the second portion being provided at the same position with the generatrix direction of the film.

Fixing device

An image-forming apparatus includes an image-forming unit, a fixing device including a heating rotator and a pressure member forming a nip portion together with the heating rotator, and a bias-applying unit applying bias to the heating rotator. Image forming modes each having a time interval between a preceding recording material and a succeeding recording material which is different from each other can be performed. A control unit executes a first control while the recording materials are being conveyed at the nip portion, and a second control while the recording materials are not being conveyed at the nip portion due to the time interval. A switching time in the image forming mode in which the time interval is a first time interval is determined to be longer than in the image forming mode in which the time interval is a second time interval shorter than the first time interval.

Fixing device and image-forming apparatus

An image forming apparatus includes an image forming unit, an acquisition unit, a fixing unit including a heating member and a pressure member forming a nip, a temperature detecting unit, and a control unit. In a case where a toner density of a toner image on a k-th recording material of a plurality of recording materials is less than the toner density of the toner image on a (k-1)-th recording material of the plurality of recording materials, k being an integer greater than or equal to two, the control unit sets a fixing temperature of the k-th recording material to a temperature which is greater than a predetermined temperature predetermined based on image information of the toner image to be formed on the k-th recording material.

Image forming apparatus and image forming method

An image heating apparatus for heating an image formed on a recording material includes a tubular rotary member including a conductive layer, a magnetic core inserted into a hollow portion of the rotary member, a coil helically wound around an outer side of the magnetic core in the hollow portion, and a control unit configured to control a frequency of an alternating current flowing through the coil, in which the conductive layer generates heat by an electromagnetic induction in an alternating magnetic field formed when the alternating current flows through the coil, and the control unit controls the frequency in accordance with a size of the recording material.

Image heating apparatus

A fixing device includes a cylindrical film; a plate heater including an electrode portion, wherein a lubricant is applied in a region where the heater contacts the film; a supporting member; and a sealing member contacting a surface of the heater where the electrode portion of the heater is provided, the sealing member being provided at a position closer to a center of the heater than the electrode portion is. The sealing member includes an engaging portion engaging with an end portion of the supporting member with respect to a widthwise direction of the heater and a cantilever contact portion contacting the surface of the heater where the electrode portion is provided.

An image forming apparatus for forming an image on a recording material by a plurality of color materials, the apparatus includes: a determination unit configured to determine, based on converted data that are converted from image data corresponding to each image formed by the plurality of color materials, values each relating to an area of a respective color material caused to adhere to a recording material; and a detection unit configured to detect, based on the values each relating to the area of the respective color material that the determination unit determines, an overlapping of color materials.

Image forming apparatus that detects overlap of color material, image processing apparatus and image processing method

The image forming apparatus includes an image forming unit, a fixing unit having a heating member, a temperature detector, an acquisition unit, and a controller. When image formation is consecutively performed, and the acquisition unit acquires a first density, which is the density information of the image formed on a k-th recording material, and a second, higher density, which is the density information of the image formed on an l-th recording material, while the image is being fixed on the k-th recording material, the controller controls the power so that the detection temperature becomes a temperature higher than a fixing temperature according to the first density, and lower than a fixing temperature according to the second density. While the image is being fixed on the l-th recording material, the controller controls the power so that the detection temperature becomes the fixing temperature according to the second density.

The image forming apparatus includes an image processing section that converts image data into pixel data, an image forming section that forms a toner image based on the pixel data, and a fixing section that fixes the toner image to the recording material by heating the recording material with the toner image formed thereon while conveying the recording material through a nip portion. The image processing section divides the pixel data corresponding to one recording material into a plurality of areas each formed of a predetermined number of pixels and acquires density information on some of the pixels within each of the areas as representative values. The fixing section carries out a process of fixing the toner image for which the density information has been acquired, under a fixing condition according to a maximum value of the representative values.

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Numazu, Japan

Mahito Yoshioka