Abstract: An image heating apparatus is for heating an image formed on a recording material, and has a first roller, a second roller cooperating with the first roller to form a conveying nip portion for passing the recording material therethrough, and heating means for heating the first roller from the outer peripheral surface side thereof, and each of the first roller and the second roller has an adiabatic layer formed of a porous ceramics material and an elastic layer disposed outside the adiabatic layer. Thereby, consumed power during the passing of the recording material can be suppressed.

Abstract: An image forming apparatus includes an image bearing member for carrying a toner image; an image forming unit for forming a toner image on the image bearing member; a transfer material carrying member, for carrying a transfer material, wherein the toner image is transferred onto a transfer material carried on the transfer material carrying member or onto the transfer material carrying member; a density detecting unit for detecting a density of the toner image transferred to the transfer material carrying member; wherein a transfer intensity is smaller when the toner image for density detection is transferred onto the transfer material carrying member than when the toner image is transferred onto the transfer material carried on the transfer material carrying member.

Abstract: An image-forming apparatus includes a movable lever which functions as a recording medium detector for detecting the passage of a recording medium and a temperature detecting portion provided on the movable lever. The temperature of the recording medium is detected without providing an additional space for a sensor for detecting the temperature of the recording medium.

Abstract: According to the present invention, a temperature sensing part of temperature sensing means is arranged to come into contact with the surface opposite to the image surface of a recording material at the time of one-sided printing without providing such an opposed member that comes into contact with the image surface of the recording material at least in a position corresponding to the position of the temperature sensing part that is in contact with the recording material.

Abstract: An image heating apparatus is for heating an image formed on a recording material, and has a first roller, a second roller cooperating with the first roller to form a conveying nip portion for passing the recording material therethrough, and heating means for heating the first roller from the outer peripheral surface side thereof, and each of the first roller and the second roller has an adiabatic layer formed of a porous ceramics material and an elastic layer disposed outside the adiabatic layer. Thereby, consumed power during the passing of the recording material can be suppressed.

Abstract: A fluorine-containing resin-coated pressure roller exhibiting excellent anti-toner soiling characteristic even at low roller temperatures is provided. The pressure roller includes a cylindrical metal substrate, and a rubber elastic layer, an adhesive layer and a fluorine-containing resin release layer disposed in this order on and successively coating the cylindrical metal substrate. The pressure roller has a surface exhibiting a micro-rubber hardness of at most 50 deg., a contact angle with water of at least 105 deg. and a ten point-average surface roughness Rz of at most 3.0 &mgr;m. The pressure roller may be suitably combined with a fixing film to provide a film heating-type fixing device suitably used in an electrophotographic image forming apparatus.

Abstract: The present invention provides an image forming apparatus which has an image bearing member for bearing an image, a transferring member for forming a transfer nip portion between the image bearing member and the transferring member, wherein a recording material is pinched and conveyed and an image on the image bearing member is transferred onto the recording material in the transfer nip portion, a rotary member contacted with the image on the recording material, and a driving roller for forming a fixing nip portion between the rotary member and the driving roller and for driving the rotary member, wherein the recording material bearing the image is pinched and conveyed and the image is fixed to the recording material in the fixing nip portion, and wherein regarding at least a recording material having a maximum size, while the image is being transferred in the transfer nip portion, the image is fixed in the fixing nip portion, and wherein a peripheral speed of the driving roller is always greater than a conve

Abstract: An image forming apparatus comprises an image bearing member for bearing an image, and a movable member which is abutted against the image bearing member and onto which the image on the image bearing member is transferred. The movable member includes a substrate, a sheet-like member, and an elastic layer disposed between the substrate and the sheet-like member and compressed to a predetermined thickness before the movable member is abutted against the image bearing member.

Abstract: An image forming apparatus includes an image bearing member for carrying a toner image; an image forming unit for forming a toner test image on the image bearing member; a transfer material carrying member, for carrying a transfer material, wherein the test toner image is transferred onto a transfer material carried on the transfer material carrying member or onto the transfer material carrying member; and a density detecting unit for detecting a density of the toner test image transferred to the transfer material carrying member. A transfer intensity is smaller when the toner test image for density detection is transferred onto the transfer material carrying member than when the toner test image is transferred onto the transfer material tarried an the transfer material carrying member. The transfer intensity also changes depending on whether the transferred toner test image is the first color toner test image or the second toner test image, and depending on an ambient condition sensor.

Abstract: An image forming apparatus includes an image bearing member for electrostatically bearing a toner image; a dielectric member movable along an endless path through a transfer position of the image bearing member; an electroconductive member in contact with the dielectric member at a side remote from the image bearing member, wherein the electroconductive member is supplied with a voltage having a polarity opposite from that of a charge polarity of the toner image to transfer the toner image from the image bearing member onto the dielectric member at the transfer position; wherein the electroconductive member is electrically grounded to generate an electric field for transferring the toner from the dielectric member to the image bearing member at the transfer position.

Abstract: An image forming apparatus has an image bearing member, a transfer material bearing member for bearing a transfer material onto which an image can be transferred from the image bearing member, an attract member for electrostatically attracting the transfer material to the transfer material bearing member, and a constant voltage control for effecting constant voltage control of the attract member with predetermined voltage. The total impedance of an attract circuit including the attract member and the constant voltage control means is 10.sup.6 .OMEGA. to 10.sup.10 .OMEGA..

Abstract: An image forming apparatus has a recording medium bearing member bearing a recording medium thereon and rotatable, the recording medium bearing member having in the surface thereof a recess extending in the direction of the rotary shaft thereof, image formation being effected on the recording medium born on the recording medium bearing member, and a rotatable member abutted against the recording medium bearing member, the rotatable member being provided with a abutting portion abutted against the recording medium bearing member, and a regulating portion adapted to abut against the recording medium bearing member when the recess and the rotatable member become opposed to each other. Thus, the distance between the recess and the bearing portion, is regulated the rotatable member being movable between a first position in which the abutting portion abuts against the recording medium bearing member and a second position in which the regulating portion abuts against the recording medium bearing member.

Abstract: An image forming apparatus includes an image bearing member, an image forming means for forming a toner image on the image bearing member, a rotary member contacted with a surface of the image bearing member, a transfer member for transferring the toner image from the image bearing member to the rotary member, and a cleaning member for removing residual toner from the image bearing member. Wherein a longitudinal width of a contact area between the image bearing member and the rotary member is smaller than the length of the cleaning member.

Abstract: An image forming apparatus includes an electrophotographic photosensitive member; a charger for charging the photosensitive member to form an electrostatic latent image on the photosensitive member; an exposure device for exposing the photosensitive member to image light; a developing device for developing the latent image with toner; a transfer member contactable to the photosensitive member at a transfer position, the transfer member comprising an electrically conductive base, a high resistance surface layer, and a low resistance or intermediate resistance conductive layer between the conductive base and the surface layer; and transfer voltage applying device for applying a transfer voltage to the transfer member; wherein Ws>Wt>Wp>W1 is satisfied, where Ws is a width of a photosensitive layer measured in a direction perpendicular to a movement direction of the photosensitive member, W1 is an image exposure width of the exposure device, Wp is a width of a transfer material usable with the image form

Abstract: An image forming apparatus has an image bearing member bearing images thereon and movable, and a transfer medium bearing member provided in pressure contact with the image bearing member and bearing a transfer medium thereon and rotatable. The transfer medium bearing member has a sheet member for bearing the transfer medium thereon, and an elastic layer supporting that area of the sheet member bearing the transfer medium thereon from the inside of the sheet member. A voltage is applied to the transfer medium bearing member to transfer the images on the image bearing member to the transfer medium born on the sheet member. The sheet member has an area not fixed to the elastic layer. The transfer medium bearing member is rotated with a potential difference created between the image bearing member and the sheet member before the operation of transferring the images on the image bearing member to the transfer medium born on the sheet member is started.

Abstract: A fixating device has a first rotatable member in contact with an unfixated image borne on a recording medium, a second rotatable member forming a nip together with the second rotatable member, a first heater for heating the first rotatable member, a second heater for heating the second rotatable member, and power supply controlling means for controlling the supply of electric power to the first heater and the second heater. The power supply controlling means is adapted to control the supply of electric power so that when the electric power supplied to the first heater is Wa and the electric power supplied to the second heater is Wb and the ratio when the recording medium is nipped between and conveyed by the first rotatable member and the second rotatable member is Dp=Wa/Wb and the ratio during standby is Ds=Wa/Wb, there may be established Dp>Ds.

Abstract: The present invention provides an image forming apparatus with an image bearing member capable of rotating while bearing a toner image thereon, a transfer device for transferring the toner image from the image bearing member to a recording material at a transfer position, recording material bearing member capable of rotating while bearing the recording material thereon and adapted to convey the recording material to the transfer position, a pair of rotary members arranged at an upstream side of the recording material bearing member in a recording material conveying direction and adapted to pinch and convey the recording material, and a separation device for separating the recording material from the recording material bearing member at a separation position.

Abstract: An image forming apparatus includes an image bearing member; an image forming device for forming a toner image on the image bearing member; a transfer material carrying member for carrying a transfer material, wherein the toner image is electrostatically transferred onto the transfer material carried on the transfer material carrying member, wherein the transfer material carrying member has a dielectric layer carrying the transfer material and a supporting member for supporting the transfer material through the dielectric layer, wherein a gap is provided between the dielectric layer and the supporting member. Alternatively disclosed is a transfer material carrying member formed of a support layer, an elastic layer on top of the support layer, an intermediate layer on top of the elastic layer, and a dielectric layer on top of the intermediate layer.

Abstract: A device is provided which is capable of removing the charge of a recording medium, even a low charge. The recording medium has an electrically-conductive layer and dielectric layers, and is used for forming a toner image by an image forming apparatus. The device includes a first charge-removing electrode in contact with the electrically-conductive layer of the recording medium and a second charge-removing electrode which is in contact with the dielectric layer of the recording medium and is positioned on a side of the recording medium which is opposite to the side of the first charge-removing electrode. A voltage with the same polarity as that remaining on the surface of the dielectric layer of the recording medium is applied to the first charge-removing electrode, and a voltage with a polarity opposite to that remaining on the surface of the dielectric layer is applied to the second charge-removing electrode.

Abstract: An image forming apparatus forms a record image with developer on a recording medium by supplying the developer between a plurality of recording electrodes and the recording medium disposed in confronting relation to the recording electrodes and by applying a signal voltage to the recording electrodes in response to image information. The image forming apparatus improves the image quality and simplifies the apparatus by providing a prevention means disposed proximate the recording electrodes and downstream thereof in a developer moving direction, for preventing the developer from shifting.