Canon Kabushiki Kaisha

Manabu Takano

Masahiro Goto

Takahiro Inoue

Koichi Suwa

Shinichi Tsukida

Koichi Hiroshima

Yasumasa Ohtsuka

Junichi Kato

Yohji Tomoyuki

Makoto Takeuchi

Masaki Ojima

Yoji Serizawa

Atsuyoshi Abe

Daizo Fukuzawa

Seiji Uchiyama

Kazuro Yamada

Yukihide Ushio

Akio Noguchi

Shimpei Matsuo

Akira Hayakawa

Hiromichi Yamada

Hiroshi Sasame

Hideyuki Yano

Kenichi Ogawa

Yasunari Watanabe

Kouichi Okuda

Hiroshi Hashimoto

Shunji Nakamura

Akira Kuroda

Koji Masuda

Mahito Yoshioka

Kensaku Kusaka

Takashi Soya

Nobukazu Adachi

Tatsunori Ishiyama

Takeshi Sugita

Yasumasa Otsuka

Hidenobu Suzuki

Osamu Mukataka

Hiromiichi Yamada

An image heating apparatus includes a heater provided with a heat generating element generating heat upon electric energization to a base; a supporting member for supporting the heater; a back-up member press-contacted to the heater; wherein an image on a recording material is heated by heat from the heater; wherein at least such a portion of the supporting member as supports the heater is of thermoplastic material.

Image heating apparatus

An image heating apparatus includes a heater; a film having a side for sliding movement relative to the heater through a lubricant and another surface contactable to a recording material carrying an image; driving member for driving the film in contact therewith; and wherein when the heater is not effecting its heating operation, a friction between the film and the driving member is smaller than a friction between the film and the heater.

An image forming apparatus has a movable image bearing member on which an unfixed image is formed, transfer device for transferring the unfixed image on the image bearing member onto a recording medium, fixing device for heating and fixing the unfixed image transferred by the transfer means on the recording medium. The fixing device has a driving rotatable member for conveying the recording medium. The recording medium during the transfer by the transfer device is conveyed by the driving rotatable member. The apparatus is provided with detecting device for detecting information regarding the peripheral velocity of the driving rotatable member, and control device for controlling the movement speed of the image bearing member on the basis of the result of the detection by the detecting device.

Image forming apparatus preventing change of size of image

An image forming apparatus which converts character or pattern information into bit map information (pixel information) and forms an image based thereon. The image forming apparatus includes a light-beam generator for generating a modulated light beam, a light-beam deflector for scanning an image carrier, a device for feeding a sheet to registration rollers and a driver for driving the image carrier. A time period is provided to operate the light-beam deflector and the feeding device before the driver starts to drive the image carrier to form an image.

Image forming apparatus with image carrier and sheet feed drive control

An image forming apparatus for forming an image on a recording medium, having an image bearing member; an image forming device for forming an image on the image bearing member; a transfer device for transferring the image formed on the image bearing member by the image forming device onto a recording medium; a heat fixing unit for fixing the image transferred to the recording medium by the transfer device onto the recording medium; a power source; and a controller for detecting a temperature increased condition of the heat fixing unit when the power source is turned ON and for determining a temperature adjust temperature of the heat fixing unit at a fixing operation in accordance with the detected result.

Image forming apparatus capable of setting fixing temperature

An image fixing apparatus includes a heating member for heating an unfixed image carried on a recording material; a fixing temperature controller for providing a variable fixing temperature of the heating member; wherein when the fixing temperature is lowered, an interval of recording material supply to the heating member is increased.

Image fixing apparatus

An image heating apparatus includes magnetic flux generating means, having an excitation coil and a core member therein, for generating magnetic flux; an electroconductive member, movable together with a recording material having and image, for generating heat by eddy current generated therein by the magnetic flux generated by the magnetic flux generating means, wherein the image is heated by the heat; wherein the core member is divided into first and second portions in a direction substantially perpendicular to a movement direction of the electroconductive member.

A fixing apparatus includes a heating member; a temperature detecting member for detecting the temperature of the heating member; a power supply controller for controlling the power supply to the heating member so that the temperature detected by the temperature detecting element during a fixing operation is maintained substantially constant at a predetermined fixing temperature; and a temperature selecting device for selecting a fixing temperature in response to both the temperature of the heating member before beginning of the fixing temperature control and a rate of the temperature change of the heating member upon supplying a predetermined amount of power to the heating member or upon turning it off.

Fixing apparatus with variable fixing temperature

An image fixing apparatus includes a heating member; a film in slidable contact with the heating member; a pressing roller cooperable with the heating member to form a nip with the film therebetween; wherein the pressing roller comprises a core metal of aluminum; and a metal member for transferring heat from the heating member.

Image fixing apparatus having means for preventing temperature unevenness

An image forming apparatus includes a feeder means and a recorder. The feeder feeds a sheet of recording paper to a predetermined position in response to a spare paper feed signal instructing the feeding of the sheet of recording paper to the predetermined position preliminarily, and then feeds the sheet of recording paper being stopped at the predetermined position again in response to a record request signal. The recorder records an image on the sheet of recording paper fed by the feeder means through an electrophotographic process. The recorder means starts preparation to execute the electrophotographic process upon receiving the spare paper feed signal. As a result throughput is increased without causing other problems.

Image forming apparatus with fixer temperature control

An image heating apparatus has a heater, a film for transferring heat from the heater to an image on a recording material, a rotary backup member for forming a nip with the film and a cleaning member for cleaning a peripheral surface of the rotary backup member. A device for moving the cleaning member is provided so that the cleaning member comes in contact with, or moves away from, the surface of the rotary backup member such that the moving device places the cleaning member in contact with the surface of the rotary backup member after the temperature of the rotary backup member increases.

Image heating apparatus comprising backup roller provided with heat

A charging apparatus for electrically charging a member to be charged includes a charging member contactable to the member to be charged to electrically charge the member to be charged. The member to be charged includes a core. A voltage source for applying an oscillating voltage between the member to be charged and the charging member such that a frequency f (Hz) of the oscillating voltage, a Young's modulus E.sub.1 (N/m.sup.2) of the member to be charged, a Young's modulus E.sub.2 of the cure an outer circumferential length 1 (m) of the member to be charged, a thickness t.sub.1 (m) of the member to be charged, and a thickness t.sub.2 of the core satisfy: f1.sup.2 /E.sub.1 t.sub.1.sup.3 +E.sub.2 t.sub.2.sup.3&lt;1.5.times.10.sup.-2 Hz.m (200&lt;f&gt;1500 Hz)

Charging device for applying an oscillating voltage to a member to be

An image forming apparatus comprises includes a feeder means and recorder. The feeder feeds a sheet of recording paper to a predetermined position in response to a spare paper feed signal instructing the feeding of the sheet of recording paper to the predetermined position preliminarily, and then feeds the sheet of recording paper being stopped at the predetermined position again in response to a record request signal. The recorder records an image on the sheet of recording paper fed by the feeder means through an electrophotographic process. The recorder means starts preparation to execute the electrophotographic process upon receiving the spare paper feed signal. As a result, throughput is increased without causing other problems.

A feed interval of continuous feeding is changed according to the set temperature of a heating member or the size of a recording material, or a feed interval is long for a predetermined time after a state for forming an image is established and is then decreased after the predetermined time has passed, thereby causing a slight increase in the temperature of the non-passage portion.

Image forming apparatus with changeable feed interval for continuous feed

An image forming apparatus has an image supporting member for supporting a toner image, a transfer rotating member forming a nip with the image supporting member and electrostatically transferring the toner image formed on the image supporting member to a recording material, a fixing device for fixing the toner image to the recording material holding the toner image, and a guide member for guiding the recording material so that the angle between the direction of separation of the recording material from the transfer rotating member and the tangent to the image supporting member at the center of the nip is at least 2.degree. in a direction toward the image supporting member. The fixing device has a fixing rotating member, which contacts the toner image on the recording material and to which a bias of the same polarity as that of the toner is applied, and a pressure rotating member in pressure contact with the fixing rotating member so as to hold the recording material between the fixing rotating member and the pressure rotating member.

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Machida, Japan

Manabu Takano