摘要:
An image forming apparatus includes an image bearing member; an electrostatic image forming unit for forming an electrostatic image on said image bearing member, the electrostatic image forming unit including a flexible charge member for electrically charging the image bearing member, the charge member forming a nip between the image bearing member and itself and is supplied with an oscillating voltage, wherein electroconductive particles are provided in the nip; and a developing unit for developing an electrostatic image formed on the image bearing member with a developer, the developing unit being capable of a residual developer on the image bearing member, wherein a frequency f (cycle/sec) of the oscillating voltage and a peripheral speed v (mm/sec) of the image bearing member satisfy |f/v|≧12 (cycle/mm).
摘要翻译:图像形成装置包括:图像承载部件; 静电图像形成单元,用于在所述图像承载部件上形成静电图像,所述静电图像形成单元包括用于对图像承载部件充电的柔性充电部件,所述充电部件在图像承载部件与其自身之间形成辊隙, 具有振荡电压,其中导电颗粒设置在辊隙中; 以及显影单元,用于利用显影剂使形成在图像承载部件上的静电图像显影,该显影单元能够在图像承载部件上具有残留的显影剂,其中振荡电压的频率f(周期/秒) 图像承载部件的速度v(mm / sec)满足| f / v |> = 12(周期/ mm)。
摘要:
An image forming apparatus includes an image bearing member, a flexible changing member and a developing device. When a first area to be an image forming area of the image bearing member, is present in a nip portion, a superimposed voltage resulting from a direct current voltage and an alternating voltage having a peak to peak voltage smaller than an alternating voltage applied when a charging potential of the image bearing member is converged is applied to the charging member. When a part of a second area to be a non-image area of the image bearing member exists in the nip portion, a direct current voltage without an alternating voltage is applied to the charging member.
摘要:
An image forming apparatus includes a flexible charging member, which forms a nip portion between itself and an image bearing member. The charging member charges the image bearing member and is applied with a voltage when the charging member at least charges the image bearing member for an image formation. The nip portion is provided with an electrically conductive particles developing device for developing an electrostatic image formed on the image bearing member with a developer. The developing device executes a developing operation and, at the same time, executes a collecting operation for collecting a residual developer on the image bearing member. The voltage is a superposed voltage with a direct current voltage and an alternating current voltage having a peak to peak voltage, which is less than a peak to peak voltage of the alternating current voltage applied to the charging member when the charging potential of the image bearing member converges under the condition that the charging member charges the image bearing member without the conductive particles.
摘要:
A developing apparatus includes a developer carrying member for carrying a developer to develop an electrostatic image formed on an image bearing member with the developer; a developer regulating member regulates an amount of the developer carried on the developer carrying member; and a controller for controlling a potential difference between the developer carrying member and the developer regulating member such that the potential difference is larger in at least a part of non-developing operation than in a developing operation when the developer carrying member carries the developer.
摘要:
A color printer has multiple developing-agent-containing cartridges each having storage units, and a cartridge holding unit for rotatably holding the developing-agent-containing cartridges. With one of the multiple developing-agent-containing cartridges positioned at an image formation position, a latent image on an image carrying member is developed by the developing agent contained in the developing-agent-containing cartridge. An access position where the storage units of the developing-agent-containing cartridges are accessed is a position other than the image formation position. This provides an image formation device and a control method thereof whereby storage units provided to developing-agent-containing cartridges can be accessed in a precise manner.
摘要:
A color printer has multiple developing-agent-containing cartridges each having storage units, and a cartridge holding unit for rotatably holding the developing-agent-containing cartridges. With one of the multiple developing-agent-containing cartridges positioned at an image formation position, a latent image on an image carrying member is developed by the developing agent contained in the developing-agent-containing cartridge. An access position where the storage units of the developing-agent-containing cartridges are accessed is a position other than the image formation position. This provides an image formation device and a control method thereof whereby storage units provided to developing-agent-containing cartridges can be accessed in a precise manner.
摘要:
A color printer has multiple developing-agent-containing cartridges each having storage units, and a cartridge holding unit for rotatably holding the developing-agent-containing cartridges. With one of the multiple developing-agent-containing cartridges positioned at an image formation position, a latent image on an image carrying member is developed by the developing agent contained in the developing-agent-containing cartridge. An access position where the storage units of the developing-agent-containing cartridges are accessed is a position other than the image formation position. This provides an image formation device and a control method thereof whereby storage units provided to developing-agent-containing cartridges can be accessed in a precise manner.
摘要:
The present invention provides an image forming apparatus that has a plurality of image bearing members for bearing developer images thereon, and a plurality of developer containing portions for containing developers therein and provided correspondingly to respective ones of the plurality of image bearing members, wherein the developer images can be transferred from the plurality of image bearing members to a transferring member moving along the respective transferring positions of the plurality of image bearing members, and of the plurality of developer containing portions, a developer containing portion having greatest developer containing quantity is provided at least one of upstream of the most upstream one of the plurality of image bearing members and downstream of the most downstream one of the plurality of image bearing members, with respect to a moving direction of the transferring member.
摘要:
The present invention is to provide an image forming apparatus in which each of the plurality of image forming station includes an image bearing body, a developer for developing latent image on the image bearing body by toner, and a cleaner for effecting cleaning of toner on the image bearing body. The toner image on the image bearing body is transferred to a carrying member side; toner on the carrying member is collected by the cleaner via the image bearing body. A volume of the cleaner of first image forming station of the plurality of image forming station to contain toner made is larger than a volume of cleaners of other image forming stations to contain toner.
摘要:
The present invention relates to an image forming apparatus that forms an image by consecutively superposing toner images that have been formed on a plurality of photosensitive drums, on an intermediate transfer member or a transfer medium. The image forming apparatus is made compact and operates at a low cost. Since a current supply member supplies a current in a rotational direction of an intermediate transfer belt, multiple first transfer portions do not need corresponding voltage sources. Even in the case where a charging member supplies a current, the potential of the intermediate transfer belt is maintained at a predetermined potential by a constant-voltage element connected to support rollers.