Toshiba Tec Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Takehiro Meguro

Yoshiki Kogiso

Hiroshi Ishii

Koji Takahashi

Sunao Takenaka

Koichiro Sato

Kazufumi Ishida

Suguru Kurita

According to one embodiment, a belt positioning structure includes a belt roller around which an endless belt is wound. The belt comprises a belt-side positioning component curbing position aberration from the belt roller in a roller shaft direction. The belt roller comprises a roller-side positioning component curbing position aberration of the belt in a belt shaft direction. The roller-side positioning component comprises a regulation plate formed along a virtual tapered surface that has a diameter on one side in the roller shaft direction larger than a diameter on an opposite side of the regulation plate. The regulation plate comprises a movement regulation component that regulates movement of the belt-side positioning component to the one side of the belt-side positioning component in the roller shaft direction and strengthens a movement regulation force to the one side of the belt-side positioning component in the roller shaft direction.

Belt positioning structure, belt roller unit, and image forming apparatus

According to one embodiment, there is provided a belt positioning structure including a belt roller, a belt, a projection, and a first rotating body. The belt roller is rotatable about a roller axis. The belt is wound around the belt roller. The projection is provided so as to protrude from an inner peripheral surface of the belt. The first rotating body regulates the projection from moving in a first direction approaching the belt roller along the roller axis. The first rotating body is rotatable around an axis. At least a portion of an outer peripheral surface of the first rotating body faces a side surface of the projection on the first direction side.

Belt positioning structure, belt and roller unit, and image forming apparatus

Certain embodiments provide a transfer apparatus, which including: an conductive intermediate transfer member; a transfer section configured to secondarily transfer a toner image onto an image receiving medium in a constant current system; a conveyance section configured to convey the image receiving medium; and a high voltage transformer configured to apply a bias to the transfer member, wherein the sum of the products of the volume resistivities [&#x3a9;&#xb7;cm] and the thicknesses [cm] of the intermediate transfer member and the transfer member is equal to or greater than 3.6&#xd7;10&#x3a9;&#xb7;cm, and the conveyance speed V[mm/s] of the image receiving medium={the output upper limit value A[V] of the absolute value of the voltage output from the transfer polarity side of the high voltage transformer}&#xd7;0.009.

Transfer apparatus and image forming apparatus

In accordance with an embodiment, the marking apparatus comprises a marking section configured to print, with a color erasable material, a mark in the margin area of a sheet and a marking control section configured to overprint, using the marking section, a mark at a specific position of the sheet every time an image is formed in the image printing area of the sheet with a color erasable material.

Marking apparatus and color erasing apparatus

A cleaning device comprises a device case having a toner collecting space, a blade holder swingably supported in directions in which the blade holder approaches and leaves from the photosensitive drum, an elastic seal member attached to one of a wall of the toner collecting space and the blade holder, between an outer face of the wall forming the toner collecting space and the blade holder, in order to be forcibly brought into contact with one of the wall forming the toner collecting space and the blade holder, wherein the blade holder or the wall forming the toner collecting space has a protrusion that is at least partly welded into the elastic seal member, and is forcibly brought into contact with the elastic seal member.

Growing community of inventors

Hiratsuka Kanagawa, Japan

Takehiro Meguro