Kabushiki Kaisha Toshiba

Toshiba Tec Kabushiki Kaisha

Other

Shoko Shimmura

Takeshi Watanabe

Masashi Takahashi

Satoshi Kinouchi

Toshihiro Sone

Ryota Saeki

Kazutoshi Takahashi

Minoru Yoshida

Takashi Hatakeyama

Osamu Takagi

Shigeru Fujiwara

Takafumi Amano

Kazuhiko Kikuchi

Daisuke Ishikawa

Shuji Yokoyama

Toshihiro Kasai

Masahiro Doi

Tadashi Noguchi

Hiroyuki Ishikawa

According to one embodiment, a fuser includes a heat roller, an endless belt, a first press roller and a second press roller. The heat roller rotates and contacts a toner surface side of a sheet, and heats the sheet. The endless belt contacts a part of an outer peripheral surface of the heat roller. The first press roller contacts a part of an inner peripheral surface of the endless belt, and is provided at an insertion part of the sheet in a nip portion where the heat roller contacts the endless belt. The second press roller contacts a part of the inner peripheral surface of the endless belt, is provided at an exit part of the sheet in the nip portion, and has a lower rotational resistance than the first press roller.

Fuser using endless belt and image forming apparatus

According to one embodiment, a fixing device includes determination means for determining the size of a medium, heating means for including plural heat-generating members which are two-dimensionally arranged such that the heat-generating members are lined up along two parallel lines or more which are vertical to a transport direction of the medium and divided at locations on the parallel lines, and are disposed so as to come into contact with an inner side of the rotating body, and a switching unit which switches individual conduction, and heats the medium, pressing means for forming a nip by performing pressing and contact at a position of the plural heat-generating members, and heating control means for selecting a group of the heat-generating members which are lined up in the two-dimensional arrangement, conducting the selected group of the heat-generating members, and controlling the heating means.

Fixing device and fixing temperature control method of fixing device

An image forming apparatus includes a photoreceptor, an exposure unit having a plurality of light emitting elements that are configured to emit light corresponding to an image to be formed towards the photoreceptor, a developing unit containing toner that is transferred to the photoreceptor therefrom, and a control unit configured to control a potential of the developing unit. The control unit is configured to control the potential of the developing unit, such that the toner is selectively transferred to a region of the photoreceptor that has received light of an intensity that is greater than a predetermined value. The predetermined value is equal to or greater than 40% and equal to or smaller than 60% of an average peak intensity of the plurality of the light emitting elements that are driven with a maximum current value.

Image forming apparatus and method for forming a streakless image by setting a potential of a developing unit

According to one embodiment, a fuser includes a fixing belt including a conductive layer, an induction-current generating section to electromagnetically induction-heat the conductive layer, an opposed section to form a nip in cooperation with the fixing belt, an auxiliary heat generating section electromagnetically induction-heated by the induction-current generating section, and a moving section to move the auxiliary heat generating section with respect to the fixing belt.

Fuser for equalizing temperature of heat generating section

According to one embodiment, an image forming apparatus includes an image bearing member on which an electrostatic latent image is formed by exposure, an exposing device including a plurality of light sources and a plurality of lenses, which are provided along a longitudinal direction of the image bearing member, and configured to radiate light on the image bearing member, and a developing device arranged at a fixed distance apart from the image bearing member and configured to develop, according to application of a direct-current bias, the electrostatic latent image formed on the image bearing member into a visible image using a two-component developer.

Image forming apparatus and method using electrophotographic two-component development

An image forming apparatus according to an embodiment includes: an image erasing section including a first member which has an elastic layer and heats a recording medium having a thermally decolorizable toner image on the toner image side and a second member which erases the toner image by allowing the recording medium in cooperation with the first member; an image forming section which transfers a thermally decolorizable toner image onto the recording medium on which the toner image is erased to form an unfixed toner image; and an image fixing section including a third member which does not have an elastic layer and heats the recording medium on the unfixed toner image side and a fourth member which fixes the unfixed toner image by allowing the recording medium in cooperation with the third member.

Image forming and erasing apparatus and image forming and erasing method

A fuser is equipped with a heating roller, fixing belt, pressure roller, pad, and spring. The heating roller is located on the downstream side of the fixing belt with respect to the sheet conveyance direction, and as the heating roller rotates, contacts the sheet toner side of a sheet, heating the sheet. The fixing belt contacts the side of the sheet opposite to the toner side of the sheet. The pressure roller comes into contact with the heating roller via the fixing belt. The pad is of a softer material than the fixing belt, and, as the pad exerts a force on the heating roller by pressing on the fixing belt, a downstream side of the pad with respect to the sheet conveyance direction is inclined away from the pressure roller. Springs urge the pad toward the pressure roller and the heating roller.

Fuser and image-forming apparatus that use endless belt

According to one embodiment, an image forming apparatus includes a photoconductive member, an intermediate transfer belt, a transfer and fixing belt, a fixing and pressing roller, and a heating device. The heating device heats a toner image on the transfer and fixing belt between a first toner image transfer position for transfer from the intermediate transfer belt onto the transfer and fixing belt and a second toner image transfer position for transfer from the transfer and fixing belt onto a sheet in a moving direction of a belt surface of the transfer and fixing belt and, at the same time, heats the sheet conveyed to the second toner image transfer position.

Image forming apparatus, toner image transfer and fixing method, and computer-readable recording medium having recorded thereon toner image transfer and fixing program

An electrophotographic developer including: magnetic particles, and a toner containing toner particles charged with the magnetic particles and having a particle diameter distribution, wherein the toner exhibits cumulative toner weight distributions of both square of charge amount q[C] and attachment force F [N] per particle with respect to a representative toner particle diameter in the particle diameter distribution, giving a linear approximation of plots of the attachment force F [N] versus the square of charge amount q[C] per particle at a plurality of corresponding cumulative toner weight ratios, and the linear approximation satisfies a slope of the linear approximation of from 5&#xd7;10to 3&#xd7;10and a squared multiple correlation coefficient (R) of 0.6 or more. As a result, the developer allows good control of transferability under the control of an electric field and allows a reduction in transfer residual amount of the toner.

Growing community of inventors

Yokohama, Japan

Shoko Shimmura