摘要:
An image forming apparatus wherein a sheet can be easily separated from a photosensitive drum both when an image is formed on one surface of a sheet and when an image is formed on the other surface, the image forming apparatus including an image forming device for using a photosensitive member to form an image on a sheet that is guided and fed along a sheet feeding path leading from a sheet stacking device, an initial curling device, positioned along the sheet feeding path, for processing the sheet so that the sheet curls away from the photosensitive member when the sheet is moved past the photosensitive member, a sheet conveying path along which the sheet, on one surface of which an image has been formed by the image forming device, is guided to the sheet feeding path, a surface reversing device, positioned along the route of the sheet conveying path, for reversing the surfaces of the sheet, and a recurling device, for processing the sheet so that the widthwise ends of the sheet curl away from the photosensitive member when the sheet delivered along the sheet conveying path is moved past the photosensitive member.
摘要:
An image forming apparatus includes an image bearer for bearing a toner image, transfer device for transferring the toner image on the image bearer to a recording medium, a separating charger for facilitating separation of the recording medium from the image bearer, a detector for detecting an image amount in a predetermined area on the image bearer, the predetermined area corresponding to a predetermined downstream side area from a leading edge of the recording material, and a controller for controlling an application voltage to the separating charger from a leading edge to a trailing edge of the recording material on the basis of the image amount in the predetermined area detected by the detector.
摘要:
Disclosed is an image forming apparatus which applies a curl to a transfer material to prevent the transfer material from winding around an image bearer. The apparatus comprises control means that reduces the transfer current to the rear end portion of the transfer material in order to curl the transfer material.
摘要:
An image forming apparatus includes: an image forming portion for forming an image; a transferring material conveying belt for conveying a transferring material toward the image forming portion; a driving roller for driving the transferring material conveying belt; a driven roller over which the transferring material conveying belt is looped; and a transferring portion for transferring the image formed by the image forming portion to the transferring material. The transferring material conveying belt is wound and stretched between the driven roller and the driving roller. A rotational axis of the driven roller is different from a rotational axis of the driving roller. Further, a surface of the driven roller includes a layer which has a coefficient of friction lower than a coefficient of friction of a surface of the driving roller.
摘要:
An apparatus including: an image forming portion; a recording-material transporting member; a cleaning portion; a fixing portion equipped with a fixing member coated with a mold release agent; and a controller. The apparatus can perform two-sided copying by transferring and fixing an image on a first surface of recording material, and then transferring and fixing an image on an opposite surface. A cleaning blade in the cleaning portion abuts the recording material transport means and a normal line of a surface of the cleaning blade is substantially directed to a gravity direction, and faces an upstream side of an abutting portion of the cleaning blade in a transportation direction of the recording-material transporting member, wherein the surface of the cleaning blade facing an upstream side of an abutting position in a transportation direction faces a direction opposite to the gravity direction.
摘要:
An image forming apparatus is provided with a movable image bearing member, such as a movable amorphous silicon photosensitive member, and an image forming member forms an image on a surface of the image bearing member. The image on the surface of the photosensitive member is transferred to a transfer material. A separator electrostatically separates the transfer material from the photosensitive member after the image is transferred by the transferring member. The separator is supplied with an electric power having a voltage of a waveform which periodically changes. In one embodiment, the voltage waveform includes at least two sine waves of different frequencies superposed to lower the peak value of the first sine wave.
摘要:
A developing apparatus for developing an electrostatic latent image includes a developing device, means for supplying a powdery developer, and a developer carrying member for carrying the powdery developer supplied by the developing device to a developing zone where a latent image bearing member passes. The developer carrying member is blast-treated with irregular particles, and subsequently is blast-treated with regular particles having an average particle size larger than that of the irregular particles, wherein a developer carrying surface of the developer carrying member has a mixed first portion provided by the blast-treatment with the irregular particles only, and a second portion provided by the blast-treatment with the irregular particles and subsequent blast-treatment with the regular particles. A blasting energy applied to the developer carrying member, per unit area thereof, is smaller in the blast-treatment with regular particles than in the blast-treatment with irregular particles. The area of the second portion is 30 t 80%, and the remaining area includes the first portion.
摘要:
A maintenance system for image forming apparatuses, which make it possible to acquire appropriate maintenance information even when an exceptional trouble has occurred in an image forming apparatus, to thereby reduce maintenance time and maintenance costs. When an abnormal image occurs in an image forming apparatus connected to a host computer via a network, the image forming apparatus transmits image data of the abnormal image together with supplementary information. The host computer receives the abnormal image data and the supplementary information, and adds these to a database in an HDD. When a transmission request is received from the image forming apparatus, the host computer transmits abnormal image data and supplementary information stored in the HDD to the image forming apparatus. The image forming apparatus receives the abnormal image data and the supplementary information, and displays these on a display unit.
摘要:
A developing agent reproducing apparatus, including a recovery device for recovering; a developing agent from a mixture of the developing agent and foreign substances, the recovery device having an attracting member for attracting the developing agent and a filter for preventing substances other than the developing agent of the mixture from passing therethrough. The filter is disposed in a region in which the developing agent is moved by the attracting member and the attracting member is disposed upstream of the filter in a gravity working direction.
摘要:
An image forming apparatus includes a rotatable intermediary transfer belt; first and second rotatable photosensitive members, arranged along a rotational moving direction of the belt, for carrying toner images; first and second electroconductive transfer rollers; first and second current detectors; an executing portion for executing a detection mode operation in which a first detection voltage is applied to the first roller and a current is detected by the first detector, and a second detection voltage is applied to the second roller and a current is detected by the second detector; and a controller for applying first and second transfer voltages to the first and second rollers in an image forming operation, based on detection results.