Abstract: An image forming apparatus includes a fixing unit having a rotating member with a surface layer, a pressing member that forms a fixing nip portion to sandwich and to transport a recording material with the rotating member, and a heater that heats the rotating member. A rotating member temperature sensor detects a temperature of the rotating member, and a wearing amount acquisition portion acquires a wearing amount of the surface layer of the rotating member. The wearing amount acquisition portion acquires the wearing amount corresponding to the temperature detected by the rotating member temperature sensor, and acquires the wearing amount per recording material. The wearing amount per recording material is different depending on the temperature detected by the rotating member temperature sensor. In addition, a control temperature setting portion sets a control temperature of the heater according to the wearing amount.

Abstract: Provided is an image forming apparatus that prints an image on a recording material. The image forming apparatus includes: a fixing unit that fixes an image formed on a recording material onto the recording material; a temperature sensor that detects temperature of a rotating member of the fixing unit; a wearing amount acquisition portion that acquires a wearing amount of a surface layer of the rotating member corresponding to the detected temperature; and a control temperature setting portion that sets control temperature of a heater according to the wearing amount.

Abstract: The image forming apparatus has an image bearing member for bearing a toner, a transfer device which forms a transfer area in cooperation with the image bearing member for transferring the toner on the image bearing member onto a recording material, a charge elimination device which is opposed to the recording material at an upstream side of the transfer area in a conveying direction of the recording material thereby eliminating a charge on the recording material, and a control device which controls the recording material so as to form a loop in a position opposed to the charge elimination device, wherein the recording material forms a loop by the control device thereby approaching to the charge elimination device.

Abstract: The image forming apparatus includes an image bearing member for bearing a toner, a transfer device which forms a transfer area in cooperation with the image bearing member for transferring the toner on the image bearing member onto a recording material, a charge elimination device which is opposed to the recording material at an upstream side of the transfer area in a conveying direction of the recording material thereby eliminating a charge on the recording material, and a control device which controls the recording material so as to form a loop in a position opposed to the charge elimination device, wherein the recording material forms a loop by the control device thereby approaching to the charge elimination device. It achieve effecting an efficient charge eliminating for a recording material.

Abstract: An image forming apparatus includes an image bearing member, a transferring device for transferring an image formed on the image bearing member to a transfer material, a transporting device for transporting the transfer material, a regulating member for regulating the transport direction of the transfer material. The charge eliminating member includes a charge eliminating portion and a supporting portion for supporting the charge eliminating portion. The regulating member has a top portion most, which protrudes in a direction from the supporting portion toward the charge eliminating portion of the charge eliminating member.

Abstract: In an oilless fixing apparatus of an image heating apparatus, a surface of a fixing roller or a pressure roller tends to be abraded by a separating claw if the contact pressure thereof is high, whereby the service life of the fixing roller or the pressure roller is often shortened. If the radius of curvature of the tip of the separating claw is reduced, there may be applied an excessively large force on the tip of the separating claw and the fixing roller or the pressure roller may be fatally damaged.

Abstract: A sheet attachment detecting apparatus includes a rotary member which is rotatable for conveying a sheet and whose surface is electrically conductive, an electrically conductive member which can be abutted on and separated from the surface of the rotary member, and an attachment detector which applies a power to the rotary member and the electrically conductive member for detecting the attachment of the sheet around the rotary member.

Abstract: A sheet conveying apparatus and an image forming apparatus include a transfer roller which transfers a developer developing an electrostatic latent image on a photosensitive drum to a sheet, a pair of registration rollers which nip the sheet into a conveying nip formed by a pair of rotary members and conveys the sheet to the transfer roller, and an upper transfer guide for leading the sheet from the pair of registration rollers to the transfer roller. In addition, a conveyance regulating member regulates a conveying direction of the sheet conveyed by the pair of registration rollers and brings the sheet into contact with the upper transfer guide.

Abstract: An image forming apparatus having an image bearing member, a transferring device for transferring an image formed on the image bearing member to a transfer material, a transporting device for transporting the transfer material to between the image bearing member and the transferring device, a regulating member for regulating the transport direction of the transfer material downstream of the transporting device with respect to the transport direction of the transfer material, and a charge eliminating member for eliminating the charges of the transfer material downstream of the transporting device and upstream of the regulating member with respect to the transport direction of the transfer material, the charge eliminating member having a charge eliminating portion and a supporting portion for supporting the charge eliminating portion, the regulating member having a top portion most protruded in a direction from the supporting portion toward the charge eliminating portion of the charge eliminating member, wherei

Abstract: A fixing apparatus has a first rotating member, a first heating device for heating the first rotating member, a second rotating member forming a nip together with the first rotating member, and a second heating device for heating the second rotating member wherein a recording material bearing an unfixed image thereon is nipped and conveyed at the nip in such a manner that the unfixed image is in contact with the first rotating member and is fixed by heating on the recording material. A voltage applying device applies voltage to create potential difference between the first rotating member and the second rotating member, and the second rotating member has a conductive parting layer with a surface resistance of 106 &OHgr; or less on a surface thereof.

Abstract: In an oilless fixing apparatus of an image heating apparatus, a surface of a fixing roller or a pressure roller tends to be abraded by a separating claw if the contact pressure thereof is high, whereby the service life of the fixing roller or the pressure roller is often shortened. If the radius of curvature of the tip of the separating claw is reduced, there may be applied an excessively large force on the tip of the separating claw and the fixing roller or the pressure roller may be fatally damaged. In order to obtain a long service life, It is provided, an image heating apparatus having a good relationship between the separating claw and a roller.

Abstract: A fixing apparatus prevents the offset of toner onto a fixing roller, by forming a surface mold release layer made of pure fluororesin material on a core member of the fixing roller and by applying a bias voltage to the fixing roller.

Abstract: To provide a sheet conveying apparatus and an image forming apparatus making stabilization of a sheet conveyance in printing an image to various sheets such as thick sheets of paper in particular, compatible with a high image quality. Each of the sheet conveying apparatus and the image forming apparatus includes: a transfer roller which transfers a developer developing an electrostatic latent image on a photosensitive drum to a sheet; a pair of registration rollers which nip the sheet into a conveying nip formed by a pair of rotary members and conveys the sheet to the transfer roller, an upper transfer guide for leading the sheet from the pair of registration rollers to the transfer roller, and a conveyance regulating member which regulates a conveying direction of the sheet conveyed by the pair of registration rollers and brings the sheet into contact with the upper transfer guide.

Abstract: A sheet attachment detecting apparatus includes a rotary member which is rotatable for conveying a sheet and whose surface is electrically conductive, an electrically conductive member which can be abutted on and separated from the surface of the rotary member, and an attachment detector which applies a power to the rotary member and the electrically conductive member for detecting the attachment of the sheet around the rotary member.

Abstract: The present invention prvides a fixing apparatus, comprising a first rotating member, first heating device for heating the first rotating member, a second rotating member for forming a nip together with the first rotating member, wherein a recording material bearing an unfixed image thereon is nipped and conveyed at the nip in such a manner that the unfixed image is in contact with the first rotating member, and the unfixed image is fixed by heating on the recording material, voltage applying device for applying voltage to create potential difference between the first rotating member and the second rotating member, and wherein the second rotating member has a conductive parting layer on a surface threreof, second heating device for heating the second rotating member.

Abstract: A fixing apparatus prevents the offset of toner onto a fixing roller, by forming a surface mold release layer made of pure fluororesin material on a core member of the fixing roller and by applying a bias voltage to the fixing roller.

Abstract: An image forming apparatus includes an image bearing member and a transfer rotary member for transferring a toner image from the image bearing member onto a transfer material. An applying device applies a constant current to the transfer rotary member. A detector detects a voltage generated in the transfer rotary member when the applying device applies the constant current to the transfer rotary member. A controller controls a voltage applied to the transfer rotary member during a transfer operation. The detector detects the voltages during intervals between consecutive transfer materials, and the controller controls the voltage on the basis of the voltages detected during different intervals.

Abstract: An image forming apparatus includes an image bearing body for bearing a toner image, a transfer member for electrostatically transferring the toner image from the image bearing body, a cleaning bias applying device for electrically cleaning the transfer member by applying a cleaning bias to the transfer member, wherein the cleaning bias applying device applies the cleaning bias to the transfer member after a one image forming job is finished, and a controller for controlling the application of the cleaning bias in accordance with the number of sheets to be image-formed in one image forming job.

Abstract: A charging roller is set in contact with a chargeable member to charge the chargeable member by application of voltage. The charging roller has an electroconductive support, an elastic layer formed thereon, and at least one coating layer formed on the elastic layer. The charging roller has surface roughness of not more than 8 .mu.m, and Asker C hardness (A) of the elastic layer, and micro-rubber hardness (B) of the charging roller satisfy the relations below:A.ltoreq.45.degree.A<B<A+20.degree..

Abstract: A fixing apparatus prevents the offset of toner onto a fixing roller, by forming a surface mold release layer made of pure fluororesin material on a core member of the fixing roller and by applying a bias voltage to the fixing roller.