摘要:
Apparatus and methods for electrographic image development, wherein the image development process is optimized by setting the developer mass flow velocity with reference to the imaging member velocity, for example, where the developer mass velocity is about the same as the imaging member velocity, or within preferred ranges, such as between about 40% to about 130% of the imaging member velocity.
摘要:
An image forming apparatus including a photoconductor, and a developing unit having a developing sleeve for carrying a developer and a developer regulating plate for regulating the amount of the developer carried on the sleeve, wherein the developer is composed of a carrier and a toner, wherein that portion of the toner which has a particle diameter of 2.0-4.0 nullm accounts for 30-70% of a total number thereof, and wherein the developer regulating plate is grounded so that when the developing sleeve is applied with a bias voltage, an electric field is formed between the developer regulating plate and the developing sleeve, whereby toner deposits on the developing sleeve are transferred to the developer regulating plate.
摘要:
In an image forming method, when viewed from the moving direction of a photosensitive body 1, there is disposed, on the upstream side, a first developing roller 61 opposed to and adjacent to the photosensitive body 1 and rotatable in the opposite direction to the photosensitive body 1, while the peripheral speed ratio of the roller 61 to the photosensitive body 1 ranges from 0.8 to 2.0; on the downstream side of the roller 61, there is disposed a second developing roller 62 rotatable in the same direction to the photosensitive body 1, while the peripheral speed ratio of the roller 62 to the photosensitive body 1 ranges from 1.05 to 2.0; and the shape coefficient SF1 of the toners of two-component developing agent ranges from 120 to 170, while the shape coefficient SF2 ranges from 110 to 130.
摘要:
An image forming method, comprising steps of: forming a toner image on an organic electrophotographic photoreceptor having a siloxane based resin layer as a protective layer with a developer carried on a developing sleeve, wherein a distance Dsd (&mgr;m) between the organic electrophotographic photoreceptor and the developing sleeve and a thickness t (&mgr;m) of the protective layer of the organic electrophotographic photoreceptor satisfy formula (1): 35t+400
摘要:
An electrophotographic image forming method includes a charging step, an exposure step, a developing step and a transfer step in the rotation of an electrostatic latent image bearing member, in which a process speed of the electrostatic latent image bearing member is 200 to 500 mm/sec, an outer diameter of the electrostatic latent image bearing member is 15 to 35 mm, an outer diameter of a developer bearing member is 10 to 25 mm, and a magnetic single component developer of which the residual magnetization in a measured magnetic field of 796 kA/m is 0.5 to 5.0 Am2/kg is used as the developer. The electrophotographic image forming method can provide a good image quality without causing scattering of toner in downsizing, weight reduction of an electrophotographic apparatus and speed-up of an electrophotographic process.
摘要翻译:电子照相图像形成方法包括静电潜像承载部件的旋转中的充电步骤,曝光步骤,显影步骤和转印步骤,其中静电潜像承载部件的处理速度为200至500mm / sec,静电潜像承载部件的外径为15〜35mm,显影剂承载部件的外径为10〜25mm,磁性单分散显影剂的测定磁场中的剩余磁化强度为796 kA / m为0.5〜5.0Am 2 / kg用作显色剂。 电子照相成像方法可以提供良好的图像质量,而不会在小型化,电子照相设备的重量减轻和电子照相方法的加速中引起调色剂的散射。
摘要:
A developing device of the present invention includes an image carrier for forming a latent image thereon, and a developer carrier for depositing a developer thereon in the form of a magnet brush. The magnet brush is caused to contact the latent image to thereby develop it. The developer carrier includes a main magnetic pole for development and an auxiliary magnetic pole adjoining the main pole and helping the main pole exert a magnetic force. The developer carrier and said image carrier are spaced by a gap of 0.3 mm or above, but 0.6 mm or below.
摘要:
The binder resin used for color toner is a polyester resin comprising a mixture of a polyvalent carboxylic acid with a specific dicarboxylic acid, and a dihydric alcohol component.
摘要:
A document printer/copier comprises a pair of drum-support members for rotatably supporting an image-recording drum and, optionally, an intermediate image-transfer drum. At least one of such drum-support members is adapted to be decoupled from the drum(s) it supports and be moved to a position within the machine frame in which it does interfere with the replacement of the drum(s)'s outer layer. Preferably, such member comprises a selectively energizable clamp which, when energized, clamps onto an axle bearing of a drum and thereby supports the drum for rotation. When de-energized, the clamp releases the drum bearing, enabling the drum-support member to be slid axially along the drum axis to a position spaced from the drum axle, and thereafter pivoted to a position spaced from the drum axis where it does not interfere with drum servicing and/or replacement.
摘要:
An image forming method, comprising steps of: forming a toner image on an organic electrophotographic photoreceptor having a siloxane based resin layer as a protective layer with a developer carried on a developing sleeve, wherein a distance Dsd (nullm) between the organic electrophotographic photoreceptor and the developing sleeve and a thickness t (nullm) of the protective layer of the organic electrophotographic photoreceptor satisfy formula (1): 35tnull400
摘要:
An image forming apparatus where the resistivity value of magnetic carrier in a developer of a two-component developing device is higher than that of magnetic particles for charging in a magnetic brush contact charger, the charging performance of the magnetic brush charging is prevented from being lowered even when the magnetic carrier is mixed into the magnetic brush contact charger, and thus, a satisfactory image without fog, unevenness in the image, and the like can be obtained for a long time even when it is applied to a cleanerless system according to the cleaning method simultaneous with developing. In case A=log Rv/Rc, B=lv/lc, &agr;=⅕·B/A·lv, and &bgr;=B/A·lv wherein Rc is the volume resistivity of the magnetic particles of the magnetic brush charger, lc is the average particle diameter of the magnetic particles, Rv is the volume resistivity of the magnetic carrier of the two-component developer, and lv is the average particle diameter of the magnetic carrier, when A/B≧2, C≧5% wherein C (%) is the ratio in volume of magnetic particles having the particle diameters ranging from &agr; to &bgr; the whole magnetic particles.