Canon Kabushiki Kaisha

Canon Kabuskiki Kaisha

Canon Kabushiki Saisha

Atsushi Iwasaki

Takahiro Uchiyama

Takashi Nomura

Akira Kato

Keisuke Mochizuki

Masato Sako

Hiroaki Sakai

Yasuhiro Shimura

Masaaki Takahashi

Kazuo Kishino

Katsuhisa Matsunaka

Masafumi Maeda

Hiroyuki Sakakibara

Norio Hashimoto

Yuko Sekihara

Tomoyuki Makihira

Daizo Fukuzawa

Naoto Tsuchihashi

Taro Ishifune

Tetsuya Yamamoto

Tomonori Sato

Masatoshi Itoh

Masaru Tsukada

Hiroshi Takami

Hiroyuki Kadowaki

Yusuke Jinkoma

Hiroshi Inoue

Takehiko Suzuki

Hiroshi Kataoka

Munehito Kurata

Eiji Uekawa

Ryota Ogura

Teruhiko Namiki

Fumiki Inui

Akira Hayakawa

Yasunari Kobaru

Seiji Inada

Shotaro Yoshimura

Takao Kawazu

Yusuke Jota

Takaomi Uezono

Toshiki Nagase

Seietsu Miura

Hirokazu Okugawa

In an image heating device having a plurality of heating blocks which are controllable independently in a longitudinal direction of a heater, an increase of the size of the heater can be suppressed, and temperatures of a plurality of heating block can be detected. The heater has a first temperature sensor corresponding to a first heating block, a second temperature sensor corresponding to a second heating block, a first electric conductor electrically coupled to the first temperature sensor, a second electric conductor electrically coupled to the second temperature sensor, and a common electric conductor electrically coupled to the first and second temperature sensors.

Image heating device and heater for use in image heating device

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

When a toner image is continuously formed on a plurality of recording materials, and the toner image is fixed onto the recording materials, a conveyance control portion changes throughput, which is the number of recording materials to be conveyed per unit time, from first throughput to second throughput, which is slower than the first throughput, when a second detection temperature detected by a second temperature detecting portion that detects a temperature at an end of a heating member in a longitudinal direction of the heating member perpendicular to a conveyance direction of the recording materials exceeds a first threshold, and changes the throughput from the second throughput to third throughput, which is slower than the second throughput, when the second detection temperature exceeds a second threshold, which is higher than the first threshold, after the recording material conveyed at the second throughput reaches the nip.

Image forming apparatus with recording material conveyance control

An image heating apparatus includes: a tubular film; a heater disposed in an inner space of the film; a roller that is in contact with the outer surface of the film and forms a nip between the roller and the film together with the heater; and a holder including an adhesion portion to which the heater adheres through an adhesive and supporting the heater. The image heating apparatus heats, using heat of the heater, an image formed on a recording material held and conveyed by the nip in case where the roller rotates. The adhesion portion includes a surface having an uneven shape of projections and recesses repeating in each of a conveyance direction of the recording material and in a longitudinal direction of the heater perpendicular to the conveyance direction, and a depth of the projections and recesses is 50 μm to 300 μm.

Image heating apparatus and image forming apparatus

An image forming apparatus includes an image forming unit to form an image on a recording material and a fixing unit. The fixing unit fixes the image formed on the recording material to the recording material. The fixing unit includes a heating member and a pressing member to form a nip portion to nip and convey the recording material with the heating member. The fixing unit further includes a pressure adjusting mechanism to apply pressure to the nip portion and release or reduce the applied pressure. If a parameter for a cumulative usage of the fixing unit is a first value, frequency of release or reduction of the applied pressure is a first frequency. If the parameter for the cumulative usage is a second value greater than the first value, the frequency of release or reduction of the applied pressure is a second frequency lower than the first frequency.

Image forming apparatus

A heater for use in an image heating apparatus includes a substrate, first and second conductors provided on the substrate, and heating elements. The heating elements are arranged between, and electrically connected in parallel to, the first and second conductors. When n denotes a number of heating elements, connected to one second conductor, in one row of the heating elements, a width L denotes a sum (n×Wh) of widths, as seen in a longitudinal direction of the substrate, of shortest current paths of all respective heating elements connected to the one second conductor plus a sum of widths, as seen in the longitudinal direction, of respective gaps between adjacent shortest current paths, and a ratio R denotes a ratio of the sum (n×Wh) of widths to the width L, the heating elements are configured so as to satisfy 0.54≤the ratio R<1.

Heater and image heating apparatus

In a longitudinal direction of a heater, a distance from a center portion of the heater to a first temperature detection element is a first distance, and a distance from the center portion of the heater to a second temperature detection element is a second distance greater than the first distance. In a first area which is farther from the center portion of the heater than the second temperature detection element is from the center portion of the heater in the longitudinal direction of the heater, a distance between a first conductor and a second conductor in a transverse direction of the heater is a first inter-conductor distance and a distance between a third conductor and a fourth conductor in the transverse direction is a second inter-conductor distance longer than the first inter-conductor distance.

Heater, fixing apparatus, and image forming apparatus

In an image heating device having a plurality of heating blocks which are controllable independently in a longitudinal direction of a heater, an increase of the size of the heater can be suppressed, and temperatures of a plurality of heating block can be detected. A heater has a first temperature sensor corresponding to a first heating block, a second temperature sensor corresponding to a second heating block, a first electric conductor electrically coupled to the first temperature sensor, a second electric conductor electrically coupled to the second temperature sensor, and a common electric conductor electrically coupled to the first and second temperature sensors.

Provided is an image heating apparatus including: a film that contacts with the recording material; a heater unit configured to be in contact with an inner surface of the film, the heater unit including a heater, and a heater support supporting the heater, wherein the heater is fixed to the heater support; a pressing roller that forms a nip together with the heater unit through the film, the nip being for nipping and conveying a recording material; a pressing member that presses the heater toward the pressing roller without through the heater support; a pressing force adjustment mechanism for adjusting pressing force in the nip; and a control portion that controls the pressing force adjustment mechanism, wherein the control portion causes the pressing force adjustment mechanism to adjust the pressing force based on temperature detected by a temperature detection member that detects temperature of the heater.

Provided is an image forming device including: an image heating portion which includes a heater including a plurality of heating blocks divided in a direction orthogonal to a conveying direction of a recording material and heats an image formed on the recording material; a temperature sensing element which senses a temperature of each of the heating blocks; and a control portion which controls electric power supplied to each of the heating blocks on the basis of the temperature sensed by the temperature sensing element, wherein the control portion determines whether or not the recording material is in a skewed state in which the recording material is conveyed in an obliquely inclined state with respect to the conveying direction on the basis of a variation of the electric power supplied to end heating blocks for heating end portions of the recording material among the plurality of the heating blocks.

Image forming device that determines whether a recording material is in a skewed state

In a heater according to the present invention, one of conductive lines is arranged to extend from a temperature detection element toward one end portion of a substrate in a lengthwise direction of the substrate, whereas the other the conductive line is arranged to extend from the temperature detection element toward the other end portion of the substrate in the lengthwise direction of the substrate, and at least one of the two conductive lines has an area that is inclined in both of the lengthwise direction and the widthwise direction of the substrate.

Heater and fixing device

An apparatus includes a control portion. When a toner image formed on a first recording material is fixed onto the first recording material by the fixing portion, and then an image is formed on a second recording material of which width is larger than that of the first recording material, the control portion can execute a cooling sequence to cool a non-passing region of the fixing portion through which the second recording material passes but the first recording material does not pass, before the toner image formed on the second recording material is fixed by the fixing portion. The control portion sets an execution condition to execute the cooling sequence in accordance with information on the toner image in the region of the second recording material corresponding to the non-passing region.

Growing community of inventors

Susono, Japan

Atsushi Iwasaki