Fuji Xerox Co., Ltd.

Chikara Ando

Toshiyuki Miyata

Yasuhiro Uehara

Daisuke Yoshino

Ryuji Katsuno

Motofumi Baba

Kazuhiko Arai

Nobuhiro Katsuta

Junpei Amano

Tatsuo Okuno

Yasushi Kawahata

Masanori Kobayashi

Jun Kimura

Yasuo Sakaguchi

Sho Watanabe

Yuichi Fukuda

Toshinori Sasaki

Yoshihisa Kitano

Masaya Nakatsuhara

Masaru Funayanagi

Yuka Nakayama

A fixing unit includes: a support member; an endless-belt-like fixing member which is wound on the support member; a pressure member which rotates in a fixed rotation direction while being pressed onto the fixing member; a fixing portion in which the fixing member and the pressure member abut against each other to perform fixation on a recording medium; a separation unit which is provided in a space between the support member and the fixing member on a downstream side of the fixing member in a rotation direction of the fixing member and for separating the recording medium from the fixing member; a separation portion which is provided in the separation unit to press the fixing member onto the pressure member and guide the fixing member to leave the pressure member; and an adjustment unit as defined herein.

Fixing unit and image forming apparatus

A medium clamping device includes: a first circularly-moving body having a circumferential surface harder than a recording medium, a longer length in a direction orthogonal to a circularly-moving direction than the recording medium in a first direction; a second circularly-moving body where the recording medium passes between the surfaces of the two circularly-moving bodies in a second direction crossing the first direction; a load applying section applying a load to at least one of the two circularly-moving bodies to clamp the recording medium; a belt member surrounding the surface of at least one of the two circularly-moving bodies, at a place outside an area touching the recording medium when the recording medium passes; and a belt-member-protecting member which is aligned with the belt member in a recording-medium-passing direction, includes a portion closer to a recording-medium-passing path than the belt member to protect the belt member from contacting the recording medium.

Medium clamping device and image forming device

The fixing device is provided with: a fixing member that has a rotating member which rotates and a heat source which heats the rotating member; a pressure member that is driven to rotate while pressing the fixing member, and that forms a nip portion where a recording medium passes, between the fixing member and the pressure member; a separation unit that separates the fixing member and the pressure member from each other; and a cooling unit that cools a face of the pressure member separated by the separating unit. The face is opposed to the fixing member.

Fixing device, image forming apparatus, fixing method and image forming method

A fixing device includes: a fixing member that is driven to rotate; a pressurizing member that is rotated in accordance with rotation of the fixing member while pressing the fixing member, and that forms a pressing portion through which a recording medium passes, the pressing portion being formed between the pressurizing member and the fixing member; and a surface shape adjusting member that has a surface including plural spherical projections and that rotates with the surface being in contact with the fixing member.

Fixing device, image forming apparatus and adjustment of fixing device

A fixing device fixes a toner image carried on a recording medium. The fixing device includes a rotatable fixing roll member, a fixing belt member and a walk adjustment mechanism. The fixing belt member is wound on the fixing roll member so as to be rotatable. The walk adjustment mechanism changes a walk width of the fixing belt member in accordance with a width of the recording medium.

Fixing device, image forming apparatus and method for controlling fixing device

The fixing device is provided with: a fixing roll that is rotatable; a belt member that is stretched by the fixing roll; a pressure roll that presses the fixing roll through the belt member; and a peeling member that presses an outer surface of the belt member against the pressure roll. The pressure roll presses the belt member with pressure at an edge portion of the belt member larger than pressure at a central portion of the belt member in an axial direction, and the peeling member presses the belt member with pressure at the edge portion of the belt member equal to or larger than pressure at the central portion of the belt member in the axial direction.

Fixing device, image forming apparatus and fixing method

An elastic roll is used in a fixing device of an image forming apparatus. The elastic roll includes an elastic layer and a covering layer disposed on an outside of the elastic layer. The covering layer is made of a heat-resistant resin or a metal, which has higher rigidity than a material of the elastic layer.

Elastic roll and fixing device

A fixing device includes: a fixing roll member; a support roll member; a fixing belt member rotated while being mounted on and tensioned by the fixing roll member and the support roll member; a roll heating unit that heats the fixing roll member; a belt heating unit that heats the fixing belt member; a pressing member that is in press contact with a portion of the fixing roll member, around which the fixing belt member is wound, to form a nip portion; and a temperature controlling device that controls and drives the roll heating unit and the belt heating unit. The temperature controlling device controls the fixing roll member and the fixing belt member to be different temperatures.

Fixing device with temperature control and image forming apparatus

A fixing unit for fixing a toner image on a recording material includes: a rotatable fixing roll; a fixing belt stretched on the fixing roll; at least one tension roll stretching the fixing belt with the fixing roll; a pressurization member disposed to give a pressure to the fixing roll; and a stripping member disposed to press the outer surface of the fixing belt onto the pressurization member in a vicinity of a downstream side of a first contact portion between the fixing roll and the pressurization member.

An intermediate transfer body to be used in an image forming apparatus for transferring and fixing a toner image from a photosensitive body onto a recording medium using an intermediate transfer body having the surface of a material such as silicone rubber which image forming apparatus reduces the friction coefficient between the photosensitive body and the intermediate transfer body to allow easy driving running control of the intermediate transfer body, and reduces the fog toner transfer rate to prevent deterioration of the image quality when the medium (40 to 70%) gloss is employed, and an image forming apparatus using the intermediate transfer body are provided. The intermediate transfer body, which receives a toner image held on a toner image carrier and transfers again the toner image onto a recording medium to form an image on the recording medium, has the surface for receiving the transfer of a toner image on which the peak area and roughed recess area are formed mixedly.

Intermediate transfer body and image forming apparatus using the

An intermediate transfer medium and the like for image formation includes transferring and fixing a toner image from a photoreceptor onto a recording medium such as paper by using the intermediate transfer medium. The intermediate transfer medium can yield a high gloss desirable for color image and the control of the driving run of the intermediate transfer medium can be maintained readily by reducing the frictional coefficient with the photoreceptor and the intermediate transfer medium can reduce the fog toner transfer rate to prevent the deterioration of the resulting image quality. The surface of the intermediate transfer medium where the image is primarily transferred (primary image transfer medium) is of smooth surface with protrusions dispersed thereon in a manner such that the smooth surface and the protrusions might be discriminated from each other. The relation between the area ratio of the smooth surface on the primary image transfer surface [Cin %] and the height of the protrusions [h (.mu.m)] preferably satisfies the following experimental formula (1):

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Kanagawa, Japan

Chikara Ando