摘要:
An image forming apparatus has an image bearing member, and a density detecting device for detecting the density of an image for density detection formed on the image bearing member. Image forming conditions are controlled on the basis of an output from the density detecting device. The density detecting device has a regular reflection type density detecting device for detecting the density by regular reflection light from a portion to be detected, and a diffuse reflection type density detecting device for detecting the density by diffuse reflection light from the portion to be detected. The output value from the diffuse reflection type density detecting device is corrected on the basis of the output value from the regular reflection type density detecting device which has detected a reference image, and the output value from the diffuse reflection type density detecting device which has detected the reference image.
摘要:
The present invention provides an image forming apparatus for forming an image on a transfer material by using an intermediate transfer member, having a first transfer bias power supply for applying transfer bias to a first transfer unit to generate first transfer bias between a photosensitive member and an intermediate transfer member, when toner images are successively firstly-transferred onto the intermediate transfer member, and a second transfer bias power supply for providing constant current to generate second transfer bias between the intermediate transfer member and the secondary transfer electrode, and wherein the second transfer bias power supply applies, in an overlap fashion, transfer bias of current having a current value greater than a current value of the transfer bias to be applied to an upstream image area of the transfer material and having the same polarity as that of the latter transfer bias to at least a non-image area of the transfer material at an end portion thereof in a transfer material conveying direction, thereby preventing the toner images from scattering.
摘要:
An image forming apparatus includes a feeder means and a recorder. The feeder feeds a sheet of recording paper to a predetermined position in response to a spare paper feed signal instructing the feeding as the sheet of recording paper to the predetermined position preliminarily, and then feeds the sheet of recording paper being stopped at the predetermined position again in response to a record request signal. The recorder records an image on the sheet of recording paper fed by the feeder means through an electrophotographic process. The recorder means starts preparation to execute the electrophotographic process upon receiving the spare paper feed signal. As a results, throughput is increased without causing other problems.
摘要:
An image forming apparatus includes a movable photosensitive member having a photosensitive layer of an organic photoconductor, a device for forming an image on a surface of the photosensitive member, a device for transferring the image formed on the photosensitive member by the image forming device onto a transfer material, the transfer device including a rotatable transfer member having a dielectric surface for moving the transfer material while contacting it to the surface of the image bearing member at a transfer position and an electrode for forming an electric field, the electrode being contacted to a surface of the rotatable transfer member remote from the photosensitive member.
摘要:
An image transfer apparatus for transferring a toner image onto a transfer material includes an image bearing member for carrying a developed toner image; image transfer bias applying roller for contacting to a backside of the transfer material, for urging it to the image bearing member having the toner image and for applying a transfer bias to transfer the toner image to the transfer material; wherein amounts of charge applied to the transfer material by the transfer bias applying roller during its transfer operation satisfyA.gtoreq.B/2where A (Coulomb/cm.sup.2) is an amount of the charge at a portion where a surface potential of the image bearing member is relatively low, and B (Coulomb/cm.sup.2) is an amount of the charge at a portion where the surface potential of the image bearing member is relatively high. Then, disturbance to the image by the image transfer operation can be avoided.
摘要:
Method and apparatus for continuously producing emulsions with particles of a disperse phase liquid in a continuous phase liquid, employing an emulsifying vessel which is interiorly provided with a gravitative flow surface and a feeder for supplying the continuous phase liquid to the flow surface for forming thereon a stream of the continuous phase liquid. On the other hand, disposed within the emulsifying vessel is a rotary atomizing head which is connected to a disperse phase liquid source and a rotational drive means and maintained at a high voltage to stratify and form a spray of atomized particles of the disperse phase liquid flying toward the flow surface under the influence of centrifugal force and electrostatic action. The disperse phase particles from the rotary atomizing head are entrained and dispersed in the stream of the continuous phase liquid on the flow surface of the emulsifying vessel to form an emulsion. The resulting emulsion is collected in a receptacle. In some cases, the emulsifier is provided with a hot steam feed pipe for feeding hot steam to the rotary atomizing head to prevent solidification of atomized disperse phase particles on the atomizing head.
摘要:
An image forming apparatus has a developing device for developing an electrostatic image formed on an image bearing member by a developer. A developer supplying unit is detachably attachable to a main body of the image forming apparatus and supplies the developer to the developing device. A density detecting device detects a density of the developer in the developing device. A developer remaining amount detecting device detects information regarding an amount of the developer in the developing supplying unit. A state of the developer supplying unit is judged on the basis of a result of the detection by the density detecting device and a result of the detection by the second detecting device.
摘要:
An image forming apparatus includes a feeder means and a recorder. The feeder feeds a sheet of recording paper to a predetermined position in response to a spare paper feed signal instructing the feeding of the sheet of recording paper to the predetermined position preliminarily, and then feeds the sheet of recording paper being stopped at the predetermined position again in response to a record request signal. The recorder records an image on the sheet of recording paper fed by the feeder means through an electrophotographic process. The recorder means starts preparation to execute the electrophotographic process upon receiving the spare paper feed signal. As a result throughput is increased without causing other problems.
摘要:
An image forming apparatus comprises a data receiver for receiving encoded character or graphic information in the unit of a page from the outside; a pixel converter for converting the encoded character or graphic information into pixel information; an image forming device for forming an image on a recording medium based on the pixel information; and a feeder for feeding the recording medium to said image forming device. In the apparatus, the feeder is adapted to feed the recording medium to a predetermined position prior to the completion of pixel conversion of a page by the pixel converter.
摘要:
An image forming apparatus includes a movable image bearing member; an image forming device for forming an image on the image bearing member; a charging member disposed opposed to the image bearing member; and bias application device for applying a bias voltage to the charging member, wherein the bias applying device effects a constant voltage control to the charging member when an image area of the image bearing member is in a charging region of the charging member, and effects a constant current control during at least a part of a period in which an area of the image bearing member other than the image area is in the charging region, and wherein a level of a constant voltage of the constant voltage control is determined during the constant current control.