A fixing device, which is constructed in a way that can easily straighten the curl without increasing cost and can prevent a re-curl generated after the sheet has been straightened, comprises a heat unit and a press unit and an ejecting unit. The heat unit and the press unit dispose a sheet opposite to a midway position of the sheet ejecting/transporting path, wherein the sheet supports a toner image. The toner image is fixed on the sheet by heat and pressure of the heat unit and the press unit,...

A shape-correcting device, an electrophotographic device (incorporating the shape-correcting device), and a method therefor that correct shaping of a sheet, include a sheet guide member positioned in a sheet transport path upstream from an image forming module formed with an arcuate section that is convex relative to the surface of the sheet and a rotatable roller opposed to the arcuate section and slidable along a direction perpendicular to the rotation axis thereof. The roller rotates and pres...

A tri-roll sheet curl control apparatus is described which includes an elastomer first roll forming a first nip with a second roll, the first roll having a compressible surface. The apparatus includes an elastomer third roll having a compressible surface which forms a second nip with the second roll surface. The second roll surface is formed of a material having a substantially noncompressible surface. The apparatus further includes a pivotable gate member that is in operating relationship with ...

The invention is to provide an image forming apparatus capable of suppressing a waving of a recording material. For this purpose, there is provided an image forming apparatus having: an image forming device for forming an image on a recording material; a fixing device for fixing the image formed on the recording material; and a recording material conveying device which is provided at a downstream side of the fixing device in a moving direction of the recording material, the conveying device incl...

A sheet processing apparatus which flattens a curled sheet includes: a water content control unit which controls a water content of a sheet to flatten the curled sheet; a decurling section which is provided downstream the water content control unit with respect to a conveyance direction of the sheet, and the decurling section bends the curled sheet to be flat by a bending force; and a conveyance route changing section which changes a conveyance route of the sheet to direct to the water content c...

A sheet conveying apparatus has a roller together with first and second rotary members abutting against an outer periphery of the roller to form, respectively, first and second nips through which a sheet passes to correct a curl in the sheet. A guide member is arranged in a central portion in an axial direction of the first rotary member so as to extend along the outer periphery of the roller to guide the sheet continuously from a position upstream of the first nip towards the second nip.

An apparatus for straightening material includes a first guide surface and a second guide surface spaced from the first guide surface. As the material is passed along the first guide surface and along the second guide surface, the first guide surface induces a first curl in the material and the second guide surface induces a second curl in the material. The amount of the first curl may be in proportion to the rigidity of the material to be straightened, and the direction of the first curl may be...

An image forming apparatus is disclosed featuring a transfer portion arranged in an apparatus main body for transferring an image onto a paper sheet, a discharge roller pair for discharging the paper sheet from the apparatus main body when a single-sided image is formed or taking the paper sheet back into the apparatus main body when a two-sided image is formed, a re-transfer portion for re-transferring the paper sheet towards the transfer portion while keeping it in an inverted state, and a str...

A cut sheet is forcibly humidified. A cut sheet S travels upward between a pair of guide plates 65 and 66 facing each other. The guide plates 65 and 66 are respectively formed with openings 67 and 68 across which linear bodies 69 and 70 are stretched. A sprinkler 30 sprinkles water droplets toward the opening 67 to supply moisture to the cut sheet S traveling between the guide plates 65 and 66.

A paper conditioner to control image dependent curl in a copier/printer includes a reservoir for storing a quantity of liquid, a pair of rolls in contact with one another so as to define a nip, and a metering roll associated with the reservoir and one of the pair of rolls. The metering roll forms a nip with one of the pair of rolls to direct a controlled flow of liquid from the reservoir to the nip area. Seals located at opposed ends of the metering roll and the roll with which it forms a nip pr...