Abstract: A fixing apparatus includes a fixing portion which comes into contact with a sheet and fixes a toner image on the sheet, a magnetic flux generating portion which generates a magnetic flux so as to heat the fixing portion by electromagnetic induction, a magnetic flux shielding portion which shields a magnetic flux generated from the magnetic flux generating portion between the fixing portion and the magnetic flux generating portion, a support portion which supports the magnetic flux shielding portion, a moving portion which moves the support portion in a width direction perpendicular to a sheet conveying direction, a controller which controls the moving portion so as to move the magnetic flux shielding portion to a position based on a sheet size in the width direction, and a sheet guide portion which is supported on the support portion and guides the sheet to the fixing portion.

Abstract: A sheet conveying apparatus comprising: a guide portion which guides a sheet; a support portion which rotatably supports the guide portion; a biasing portion which applies a force to the guide portion to be at a closed position with respect to the support portion and is provided to be detachably attachable; and a stopper portion which contacts with the biasing portion to regulate a rotation of the guide portion in a direction that the guide portion opens.

Abstract: A fixing apparatus includes a fixing portion which comes into contact with a sheet and fixes a toner image on the sheet, a magnetic flux generating portion which generates a magnetic flux so as to heat the fixing portion by electromagnetic induction, a magnetic flux shielding portion which shields a magnetic flux generated from the magnetic flux generating portion between the fixing portion and the magnetic flux generating portion, a support portion which supports the magnetic flux shielding portion, a moving portion which moves the support portion in a with direction perpendicular to a sheet conveying direction, a controller which controls the moving portion so as to move the magnetic flux generating portion to a position based on a sheet size in the width direction, and a sheet guide portion which is supported on the support portion and guides the sheet to the fixing portion.

Abstract: A sheet conveying apparatus comprising: a guide portion which guides a sheet; a support portion which rotatably supports the guide portion; a biasing portion which applies a force to the guide portion to be at a closed position with respect to the support portion and is provided to be detachably attachable; and a stopper portion which contacts with the biasing portion to regulate a rotation of the guide portion in a direction that the guide portion opens.

Abstract: An image forming system includes a non-transparent image forming apparatus including a first image forming station for forming a non-transparent toner image and for transferring the non-transparent toner image onto a recording material, and a transparent image forming apparatus including a second image forming station for forming a transparent toner image and for transferring the transparent toner image onto the recording material discharged from a first image heating unit. Formation of images as a combination of the non-transparent image and the transparent image is capable on both sides of the recording material by controlling a first re-feeding unit and a second re-feeding unit.

Abstract: A sheet compression apparatus disposed between a sheet feeding unit configured to feed a sheet and an image forming unit configured to form an image on the sheet compresses the sheet fed by the sheet feeding unit before the image forming unit forms the image on the sheet. The sheet compression apparatus includes a first rotator pair including a first nip configured to press the sheet and allowing a leading edge portion of the sheet to enter and pass through the first nip at a first angle inclined relative to the first nip, and a second rotator pair including a second nip configured to press the sheet and allowing the leading edge portion of the sheet to enter and pass through the second nip at a second angle inclined opposite the first angle relative to the second nip.

Abstract: A sheet conveying apparatus includes a guide unit configured to form a conveyance path on which a sheet passes wherein the guide unit includes curved portions curved in a thickness-direction of the conveyed sheet, and a flat portion. The guide unit includes a rib contacting with the sheet and disposed continuously spreading over the curved portions and the flat portion. The rib has at least a part tilted with respect to the sheet conveying-direction in the curved portion more than in the flat portion.

Abstract: An image forming system includes a non-transparent image forming apparatus, a transparent image forming apparatus, and a controller for controlling a combination of a non-transparent image formation process and a transparent image formation process for both sides of a recording material so that the numbers of heating operations to which outermost layers of final fixed images are subjected to a first image heating device in the non-transparent image forming apparatus and second image heating device in the transparent image-forming apparatus are the same.

Abstract: A sheet conveying apparatus includes a pair of first guides formed with a first opening; a pair of second guides; and a pair of third guides, wherein an air which has passed through a first opening of the pair of first guides is deflected to one pair of guides of the pair of the second guides and the pair of the third guides by the other pair of guides.

Abstract: A sheet conveying apparatus includes a guide unit configured to form a conveyance path on which a sheet passes wherein the guide unit includes curved portions curved in a thickness-direction of the conveyed sheet, and a flat portion. The guide unit includes a rib contacting with the sheet and disposed continuously spreading over the curved portions and the flat portion. The rib has at least a part tilted with respect to the sheet conveying-direction in the curved portion more than in the flat portion.

Abstract: A sheet conveying apparatus includes a pair of first guides formed with a first opening; a pair of second guides; and a pair of third guides, wherein an air which has passed through a first opening of the pair of first guides is deflected to one pair of guides of the pair of the second guides and the pair of the third guides by the other pair of guides.

Abstract: A curl correcting device for correcting a curl of a sheet at a curved belt-nip portion includes an endless belt extending between a driving roller and a driven roller, and a pressing roller configured to press a belt surface of the endless belt. A stepping motor is controlled in accordance with a pressing amount of the pressing roller to the belt surface of the endless belt to adjust a speed of the endless belt, thereby preventing the speed from being decreased.