Canon Kabushiki Kaisha

Dow Corning Toray Company, Ltd.

Canon Kabushikl Kaisha

Hirohiko Aiba

Masaki Hirose

Satoru Taniguchi

Takashi Honke

Mahito Yoshioka

Taisuke Minagawa

Jun Asami

Keita Nakajima

Hiroyuki Sakakibara

Kazushi Nishikata

Fumiki Inui

Masato Sako

Tomoki Fujikawa

Keisuke Mochizuki

Takahiro Uchiyama

Noriaki Sato

Tomonori Sato

Hideo Nanataki

Munehito Kurata

Takaaki Akamatsu

Hisashi Nakahara

Hideaki Yonekubo

Shuji Saito

Masahito Omata

Daisuke Sato

Yusaku Iwasawa

Kouichi Uchida

Yoshihiro Matsuo

Yoshihito Oshima

Koichi Yamada

Shinkichi Yamamoto

Teruyoshi Tanaka

Kohei Haematsu

Koichi Sugawara

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

A grease composition for heat fixing devices contains a base oil and polytetrafluoroethylene. The base oil contains a perfluoropolyether having at least one of the structures represented by formulas (I) and (II) in the molecule and has a kinematic viscosity v40 of 800 mm/s to 2500 mm/s at 40° C., and whose kinematic viscosity v200 at 200° C. is 1/50 or less of the kinematic viscosity v40.

Grease composition for heat fixing devices and heat fixing apparatus

An image forming apparatus, including: an image forming portion that forms an image on a recording material based on image data; a fixing portion that includes a heater having a plurality of heat generating members arranged in a direction perpendicular to a conveying direction of a recording material, and that fixes the image to the recording material using heat of the heater; a storage portion that stores history information on the recording material when image forming operation is performed in which the image forming portion forms the image and the fixing portion fixes the image, a control portion that sets power to be supplied to the heat generating members based on the history information before a type of the recording material on which the image is formed or content of the image data of the image to be formed on the recording material is determined.

Image forming apparatus

A controller controls power to be supplied to a plurality of heat-generating blocks obtained by dividing a heater in a direction orthogonal to a transport direction for a recording material, and when images formed on a plurality of sheets of the recording material having an equal size are continuously heated, and the controller determines whether each of the heat-generating blocks is a heat-generating block which is passed by the recording material or a heat-generating block which is not passed by the recording material on the basis of a detection temperature by a temperature detecting element when prescribed power is supplied to the heat-generating block and changes a control condition in heating on the basis of the determination.

Image heating apparatus that controls plural heat generating blocks based on whether a recording material passes the respective block, and image forming apparatus

An image heating apparatus includes a plurality of heat generating elements, a plurality of temperature detecting elements, and an energization controlling portion for selectively controlling, based on the temperature detected by each of the plurality of temperature detecting elements, electrical power to be supplied to the plurality of heat generating elements. The plurality of temperature detecting elements are arranged in each of the plurality of heat generating elements, and the energization controlling portion controls electrical power supply to the plurality of heat generating elements for the purpose of heating a non-sheet-passing heating region, through which a recording material does not pass, among the plurality of heating regions, based on a temperature detected by a temperature detecting element that is farthest from a conveyance reference position of the recording material, among the plurality of temperature detecting elements arranged in the non-sheet-passing heating region.

Image heating apparatus and image forming apparatus that control electrical power supply to a plurality of heat generating elements based on a temperature detected by a temperature detecting element

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 includes a rotatable cylindrical film, a contact member, a nip forming member, and regulating member. The regulating member includes an inner surface regulating surface that contacts and regulates a position of an inner surface of the film, and that, with respect to a rotational direction of the film, includes a first region remotest from a nip and a second region closer to the nip than the first region, the second region being positioned in a side upstream of a center of the nip with respect to a recording material feeding direction. The inner surface regulating surface is inclined so as to be spaced from the inner surface of the film toward a longitudinal center of the film, and a degree of inclination of the inner surface regulating surface is greater in the first region than in the second region.

Fixing device that regulates a position of an inner surface of a film

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

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.

Provided is a heat fixing apparatus, which suppresses the depletion of a lubricant applied to an inside of the heat fixing apparatus and which has long life and high reliability, the heat fixing apparatus including a heating rotary member and a pressurizing rotary member, and containing, as a lubricant in a sliding portion, (A) perfluoropolyether oil having a kinetic viscosity at 40&#xb0; C. of from 100 to 200 mm/s and an evaporation loss being 1.2 mass % or less in a case where 10 g of a sample of the perfluoropolyether oil is placed in a petri dish having an inner diameter of 41 mm and allowed to stand still at 250&#xb0; C. for 200 hours and (B) polytetrafluoroethylene.

Growing community of inventors

Suntou-gun, Japan

Hirohiko Aiba