Canon Kabushiki Kaisha

Mitsubishi Heavy Industries Limited

Canon Kabushiki Saisha

Keisuke Mochizuki

Atsushi Iwasaki

Takahiro Uchiyama

Masato Sako

Hiroshi Kataoka

Eiji Uekawa

Takashi Nomura

Naoto Tsuchihashi

Tetsuichiro Fujimoto

Noriaki Sato

Masao Uyama

Munehito Kurata

Norihito Naito

Yuichiro Hirata

Kodai Hayashi

Yasutaka Yagi

Hirohiko Aiba

Shuji Saito

Takayuki Mizuta

Daisuke Baba

Makoto Tokudome

Kohei Haematsu

Tomoo Akizuki

Michio Uchida

Mahito Yoshioka

Shinji Hashiguchi

Atsutoshi Ando

Satoru Taniguchi

Kenji Kanari

Hideki Ohta

Hideaki Yonekubo

Jiro Moriya

Tohru Saito

Hiroki Eguchi

Masatake Usui

Junji Suzuki

Katsuyoshi Takeuchi

Yuusuke Shimizu

Ichiro Awaya

Hirohisa Kuramoto

A fixing apparatus for fixing a toner image on a recording material includes a heating member; an opposing member which nips the recording material; and a control unit that sets a target temperature of the heating member. The control unit acquires toner amount information for each of a plurality of regions which are separated in a direction perpendicular to the conveying direction, and sets, based on (i) a first value which is based on toner amount information in each region of a first toner image formed on a first recording material, (ii) a conveying interval between the first and a second recording material, and (iii) a second value which is based on toner amount information in each region of a second toner image formed on the second recording material, the control unit sets the target temperature to heat the second recording material.

Fixing apparatus for controlling target temperature of second conveyed recording medium and image forming apparatus

An image forming apparatus includes an image forming portion, a fixing unit including a fixing member, a heating member, and a temperature detection portion, and a control portion configured to execute warm-up processing. If a temperature of the heating member at a first timing in a period of time in which the heating member is being heated in the warm-up processing is a first temperature, a temperature of the heating member at a second timing that is in the period of time and that is later than the first timing is a second temperature, and a temperature of the heating member at a timing different from the first timing and the second timing is a third temperature, the control portion is configured to change a fixing condition used in the job, based on the first temperature, the second temperature, and the third temperature.

Image forming apparatus that changes a fixing condition based on temperatures of a heating member detected at different times

Provided is an image heating apparatus including: a heater having a plurality of heating elements arranged in a direction orthogonal to a conveying direction of the recording material; and a control portion that controls electric power to be supplied to the plurality of heating elements and is capable of individually controlling the plurality of heating elements, the image heating apparatus heating an image formed on the recording material with heat by the heater, wherein the control portion sets a heating condition when controlling each of the plurality of heating elements, according to the thermal history of a heating region heated by one heating element and the thermal history of a heating region heated by a heating element adjacent to the one heating element.

Image forming apparatus and image heating apparatus

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

An image forming apparatus includes an image forming unit configured to form a toner image on a recording material, a fixing unit configured to fix the toner image formed on the recording material by the image forming unit to the recording material, and a controller configured to cause the image forming unit to form an image on a basis of image information, the controller being configured to cause the image forming unit to form the image in which a first toner image and a second toner image is superimposed on each other on the recording material, the first toner image being a toner image corresponding to the image information, the second toner image being constituted by a pattern having anisotropy such that glossiness of the image changes depending on a direction in which the image is viewed.

Image forming apparatus

An image forming apparatus includes a control unit configured to execute a first mode and a second mode. The first mode is a mode in which a toner image is formed on a sheet at a time when a sheet passes through an image formation position for a first time after detecting a property of the sheet by a detection unit. Wherein the second mode is a mode in which a toner image is not formed on a sheet at the time when the sheet passes through the image formation position for the first time after detecting the property of the sheet by the detection unit and is formed on the sheet at a time when the sheet is conveyed via the second conveyance path and passes through the image formation position for a second time.

An image heating apparatus includes an endless film, a pressing member forming a nip portion together with the film, and a film holding member provided at a longitudinal end portion of the film. The film holding member includes a movable member including a restriction surface configured to restrict a longitudinal movement of the film and a guide surface configured to guide a rotation of the film, the guide surface including a lubricant application unit. The film holding member further includes a biased member supporting the movable member and including a force reception portion, and is configured to cause the movable member to move upstream in a conveyance direction of the recording material at the nip portion relative to the biased member and cause the lubricant application unit to abut against an inner peripheral surface of the fixing film, when the movable member moves longitudinally.

Image heating apparatus

An image heating apparatus includes a heater including a first heat generating block and a second heat generating block, and a power control portion that controls electrical power to be supplied to the respective heat generating blocks. When a recording material passes the position of the heater, and, in a longitudinal direction of the heater, when an entire range in which the second heat generating block is provided is a range in which the recording material passes and only a portion of a range in which the first heat generating block is provided is a range in which the recording material passes, the power control portion controls the electrical power to be supplied to the respective heat generating blocks so that electrical power Wd supplied to the first heat generating block is less than electrical power Wc supplied to the second heat generating block.

Image heating apparatus and image forming apparatus that control electrical power supplied to first and second heat generating blocks

An image heating apparatus fixes a toner image by heating a recording material bearing an image when a film rotates around a support member which supports a nip forming member forming a nip portion with a rotating member while sliding on the nip forming member. The image heating apparatus includes a temperature detection element which outputs information about a detected temperature to a control unit which controls a temperature of the heating member supplying heat to the rotating member or the film, a first supply member which supplies a lubricant to the film in contact with the film, and a second supply member which is different from the first supply member and supplies the lubricant to the film in contact with the film, wherein the temperature detection element is arranged between the first supply member and the second supply member in a longitudinal direction of the support member.

Image heating apparatus which attains secure fixing of an unfixed image and reduction of energy to be consumed while securing slidability of a film

An image heating apparatus includes a heater having a plurality of heating elements arranged in a direction orthogonal to a conveying direction of a recording material, each of the plurality of heating elements having a heating region, and a control portion that controls electrical power to be supplied to the plurality of heating elements, the control portion being capable of individually controlling the plurality of heating elements. The control portion executes control of a heat generating quantity of each of the plurality of heating elements such that a heat generating quantity when heating a first region of the recording material including an image, a heat generating quantity when heating a second region of the recording material not including an image, and a heat generating quantity when heating a third region, in which there is no recording material, are different from each other.

Image forming apparatus and image heating apparatus for controlling a heat generating quantity of a plurality of heating elements

A control portion determines the lengths of time required to raise a plurality of heat generating elements to prescribed start-up completion target temperatures, and when a heat generating element determined to have the longest start-up requirement time among a plurality of heat generating elements is a second heat generating element, and a heat generating element determined to have shorter start-up requirement time than that of the second heat generating element among a plurality of heat generating elements is a first heat generating element, the control portion controls power to be supplied to the first heat generating element by changing a start-up control parameter for the first heat generating element with reference to the start-up performance of the second heat generating element.

Image heating apparatus and image forming apparatus

Growing community of inventors

Suntou-gun, Japan

Keisuke Mochizuki