Canon Kabushiki Kaisha

Shinichiro Wakahara

Jiro Shirakata

Koji Takematsu

Koki Watanabe

Shinichiro Hosoi

Shouhei Takeda

Tetsuro Fukusaka

Katsuhiro Ishido

Kazunori Togashi

Yuichi Makino

Takashi Soya

Masafumi Kamei

Jiro Futagawa

Koichiro Nishimura

Kazuo Shishido

Yasumi Yoshida

Shohei Takeda

The present invention relates to an image forming apparatus comprising: an operating part which operates the image forming apparatus; an optional first speaker which outputs information guiding operation of the operating part; and a second speaker which outputs sound information that is different from operation guidance information; wherein when the first speaker and the second speaker disposed such that a surface of the first speaker is directed to a front surface of the image forming apparatus that is opposed to the operating part, and a surface of the second speaker is directed to a side surface of the image forming apparatus that is different from the first speaker.

Image forming apparatus

An image heating device has a magnetic flux generator, a heat generating element for generating heat by a magnetic flux from the magnetic flux generator; a magnetic flux confining member, the magnetic flux confining member including a magnetic flux confining portion for confining the magnetic flux directed toward a predetermined region of the heat generating element at a predetermined magnetic flux confining position and a connecting portion connecting with the magnetic flux confining portion in a longitudinal direction of the heat generating element to hold the magnetic flux confining portion; and a moving unit for moving the magnetic flux confining member to a magnetic flux confining position or to a retracted position where the magnetic flux confining member is retracted from the magnetic flux confining position, wherein the connecting portion has a regulating member for preventing movement to the magnetic flux confining position.

An image reading apparatus reads an image from a document being simultaneously fed by the apparatus. A document feeder unit feeds the document on a original plate. A first image reading unit reads an image from the fed document at a first document-read position on the original plate. A second image reading unit reads an image from the fed document at a second document-read position located at a predetermined distance from the first document-read position in a document feeding direction. An abnormal pixel detection unit detects abnormal pixels resulting from rubbish moved between the first document-read position and second document-read position on the original plate together with the document.

Image reading apparatus and method for controlling the same

There is provided an image reading apparatus for acquiring a read signal of an image by receiving and photoelectrically converting a light reflected from a document. The location of an alien substance on an original plate is detected based on a reflected light received by a light receiving unit adapted to receive a light reflected from a document. When an alien substance is detected, an illumination unit selectively illuminates the location in which the alien substance has been detected. Also, a message which prompts cleaning of the alien substance is displayed. A method of displaying the alien substance location are also provided. Thereby, the image reading apparatus of the present invention can assists a user in cleaning the alien substance such as a dust or dirt on the original plate.

Image reading apparatus and method of displaying alien substance location thereof

An image heating member includes a first region having a Curie temperature higher than a preset temperature, and a second region having a Curie temperature lower than the Curie temperature of the first region. A width of the first region in a conveying direction of a recording material is equal to or larger than a width of the recording material of a maximum size to be fed. The second region is provided outside the first region.

Image heating device using induction heating system

An image heating apparatus includes a heating roller for heating an image on a recording material; a coil unit disposed in said heating roller and including a coil for induction heat generation in said heating roller; a supporting member for rotatably supporting said heating roller, wherein said supporting member including a holding portion for substantially non-rotatably holding said coil unit.

Image heating apparatus and method for manufacturing image heating apparatus

An image forming apparatus has a fixing apparatusthat performs electromagnetic induction-heating due to an operation of magnetic fluxes emitted from a magnetic flux generating unit, and a high-frequency power supply circuit which supplies a high-frequency current to the magnetic flux generating unit. The high-frequency power supply circuit is disposed in a casing frame of a main body of the apparatus.

Image forming apparatus with casing having metal plates on each peripheral side

An image heating apparatus includes a coil for generating magnetic flux, a rotatable heat generation member for generating heat by the magnetic flux generated by the coil to heat a recording material, and a magnetic flux adjusting member for adjusting a distribution of the magnetic flux from the coil toward the heat generating member. The apparatus further includes a motor, a first drive transmission member, and a second drive transmission member for moving the magnetic flux adjusting member.

Image heating apparatus

In order to prevent non-sheet passing portion temperature rise occurred in a non-sheet passing area of an electromagnetic induction heating member, leakage of magnetic flux is reduced by setting a Curie temperature of the heating memberto be smaller than an acceptable upper limit temperature and setting a thickness of the heating member so that a thickness tk in a Curie temperature arrival area (P&#x2212;P) is larger than a thickness tn in a Curie temperature non-arrival area Pwhich is a conveyance area of a material to be heated having a minimum passing size.

Induction image heating apparatus

An image heating apparatus includes magnetic flux generating means; a rotatable heat generation member for generating heat by a magnetic flux generated by the magnetic flux generating means to heat a recording material; a magnetic flux adjusting member, disposed between the magnetic flux generating means and the heat generation member, for adjusting a magnetic flux effective region for the heat generation member, with respect to a longitudinal direction which is perpendicular to a feeding direction of the recording material; moving means for moving the magnetic flux adjusting member to a predetermined magnetic flux adjusting position to adjust a temperature distribution of the heat generation member with respect to the longitudinal direction; and a drive receiving portion, disposed at opposite end portions of the magnetic flux adjusting member, for receiving a driving force from the moving means.

A manufacturing method for an image heating apparatus for heating an image on a recording material by a heat from a heat generating element for producing heat by a magnetic flux generated by magnetic flux generating means, the apparatus including a magnetic flux confining member for confining a magnetic flux directing toward a predetermined region of the heat generating element from the magnetic flux generating means, and a first drive transmission member, provided at one end of the magnetic flux confining member, for transmitting rotational drive to the magnetic flux confining member and a second drive transmission member, provided at the other end of the magnetic flux confining member, for transmitting rotational drive to the magnetic flux confining member, the method comprising an adjusting step of adjusting such that first and second drive transmission members are supported by the magnetic flux confining member with a predetermined rotational position relation, using marks provided on the first and second drive transmission members, respectively.

An image forming apparatus includes a controller controlling a movement of a moving member to successively move a plurality of developing devices to a developing position in an image forming operation. A moving distance in at least one moving operation is different from a moving distance in other moving operations. A controller performs at least one moving operation and other moving operations during a transfer operation by a primary transferring device. The controller controls a moving speed of the moving member so that a relative position of a trailing edge of an image forming region on the image bearing member with respect to the developing position is controlled for the at least one moving operation and the other moving operations and so that the moving speed is uniform when the moving member performs a developer supplying operation in a non-image forming operation.

Image forming apparatus including a controller for controlling a moving speed of a moving member holding a plurality of developing devices

A fixation apparatus having a good fixability in its longitudinal direction and an image forming apparatus are provided. The fixation apparatus includes an electromagnetic induction heating member which is a hollow rotation member, and a magnetic flux generation member for causing the electromagnetic induction heating member to generate heat by generating magnetic flux in the electromagnetic induction heating member. The fixation apparatus fixes a toner image on a recording material by imparting heat energy by heat generation of the electromagnetic induction heating member to the recording material to be conveyed. The electromagnetic induction heating member has a different thickness in the longitudinal direction thereof and a uniform diameter at a surface facing the magnetic flux generation means in the longitudinal direction.

Growing community of inventors

Tokyo, Japan

Shinichiro Wakahara