摘要:
In an image forming apparatus, a developing device is disposed adjacent to a belt-like photosensitive member. A rotary type developing device has a hollow cylindrical casing rotatable around a shaft having a central portion for rotation. The developing device includes a casing which is rotated in a predetermined direction, and four partitions which divide the casing to make four developing units which extend radially outward from the shaft. A toner storing section or hopper is provided on one side of the developing device, i.e., on a front side of the image forming apparatus, and a toner cartridge is detachable from a top of the hopper, and the toner cartridge is exchanged when an end signal of the toner is detected by a sensor in the casing. The toner hopper is filled by new toner from the toner cartridge, and the toner is carried by conveyor members, which control an amount of the toner in the casing, and a supply roller supplies the toner to a developing roller. Therefore, the device supplies a required amount of toner to a toner supply roller and a developing roller at all times. This provides an image forming apparatus with a great freedom of layout which needs a minimum sectional space relative to a photoconductive element and which, therefore, has a miniature configuration. Also, if amounts of transport of first and second conveyor members are adequately selected, a uniform developer distribution in a longitudinal direction without resorting to a complicated control is insured.
摘要:
In an image forming apparatus, a rotary developing device effects development by revolving a plurality of developing sections around a rotary shaft until any one of them reaches a developing position where it faces an image carrier. Cartridges are respectively mounted to hoppers included in the developing sections. Guides are provided on the inner periphery of each cartridge in order to guide toner, moving due to the revolution or the developing device, toward a toner outlet formed in the cartridge. Even when the amount of toner remaining in the cartridge is small, the entire toner is replenished into the associated hopper and fully consumed.
摘要:
A rotary developing device for an image forming apparatus includes a plurality of rotary developing units accommodating a powder developer and being supported around a common axis, and a plurality of toner cartridges corresponding to the plurality of rotary developing units for supplying toner to the plurality of rotary developing units. Each rotary developing unit is moved to a developing position facing a latent image carrier by the rotation about the common axis and an electrostatic latent image formed on the latent image carrier is developed. The plurality of toner cartridges are connected with the plurality of rotary developing units so as to rotate together, and a toner outlet of the toner cartridge is disposed such that the toner is supplied to the respective rotary developing unit by the force of gravity on the toner accommodated in the respective toner cartridge at the time of rotational movement of the toner cartridge.
摘要:
In an image forming apparatus, a revolver type developing device has a plurality of developing units and revolves to sequentially bring them to a developing position facing an image carrier on which a latent image is electrostatically formed. The revolver promotes easy replacement and safe handling of the developing units and can be accurately positioned relative to the body of the image forming apparatus. Despite that the revolver is miniature, it prevents developers from leaking or flying off from the developing units and contaminating the inside of the apparatus or being mixed with each other.
摘要:
A color image forming apparatus of the type having a photoconductive belt for forming a latent image thereon electrostatically. The latent image is developed to turn out a corresponding toner image. The toner image is transferred from the photoconductive belt to an intermediate transfer belt. Such a procedure is repeated to form a composite color image on the intermediate belt. The color image is transferred from the intermediate belt to a recording medium. Any point on the intermediate belt in the direction of rotation and any points on drive rollers assigned to the two belts, respectively, in the direction of rotation are held in the same positional relation to a stationary member every time the intermediate belt completes one rotation.
摘要:
An electrophotographic color image forming apparatus is disclosed which allows a photoconductive element and an intermediate transfer belt, which are expendables, to be removed from the body thereof at the same time. This promotes easy replacement, inspection and so forth of expendables. The photoconductive element and intermediate transfer belt can be replaced substantially at the same period, reducing the frequency of replacement of expendables. A cartridge including the photoconductive element can be replaced with a minimum of component parts wasted, thereby enhancing the cost performance of the apparatus. Moreover, when a cover hinged to the body of the apparatus is opened, various units can be removed one after another, a unit around which the greatest space is available being first.
摘要:
A developing device capable of obviating the cohesion of toner and reducing the amount of dead toner is disclosed. The device has a developing unit accommodating a first and a second screw therein. The first and second screws extend from the toner hopper to the other longitudinal end of the developing unit in parallel to a developing roller and a supply roller. The first screw feeds toner from a toner hopper to a developing section. The second screw collects toner not contributed to development from the developing section and returns it to the first screw for recirculation. In this configuration, the collected toner and dead toner aggregating in the lower portion of the developing unit are forcibly moved to the developing section. The direction in which the screw portion of the second screw is inclined may be partly reversed to form a reverse transfer portion. Alternatively, a part of a casing adjoining the hopper may be implemented as a slant. The reverse transfer portion or the slant recirculates the toner more forcibly.
摘要:
A cleaning blade includes a blade member formed of a strip-shaped rubber material and having a leading-edge ridge line portion to contact a moving surface of a cleaning target member and remove adhering matter from the surface of the cleaning target member. The blade member has a Martens hardness of 1.0 N/mm2 or more in a vicinity of the leading-edge ridge line portion measured from an opposing surface of the blade member, the opposing surface including the leading-edge ridge line portion and opposing the cleaning target member, or measured from a leading-edge surface of the blade member, the leading-edge surface including the leading-edge ridge line portion and disposed adjacent to the opposing surface of the blade member.
摘要翻译:清洁刮板包括由条状橡胶材料形成的刀片构件,并且具有前缘脊线部分,用于接触清洁目标构件的移动表面并从清洁对象构件的表面去除附着物质。 刀片构件在从刀片构件的相对表面测量的前缘脊线部分附近的马氏体硬度为1.0N / mm 2以上,相对表面包括前缘脊线部分并且与清洁 目标构件,或者从叶片构件的前缘表面测量的前缘表面包括前缘脊线部分并且邻近刀片构件的相对表面设置。
摘要:
A cleaner is provided. The cleaner includes a cleaning blade having an edge to be contacted with a surface of a member to be cleaned while moving relative to the member to clean the surface of the member. The cleaning blade includes the edge, and first and second side surfaces, wherein the edge is disposed between the first and second side surfaces. When the cleaning blade is not contacted with the surface of the member to be cleaned, the first side surface is opposed to the surface of the member, and when the cleaning blade is contacted with the surface of the member, the edge, and the first and second side surfaces of the cleaning blade are contacted with the surface of the member.
摘要:
An image forming apparatus including a plurality of image forming sections each having an electrostatic latent image bearing member to form a latent image on its surface, a charging device to uniformly charge the electrostatic latent image bearing member, a developing device to develop the electrostatic latent image formed on the electrostatic latent image bearing member into a visible image and a cleaning device to remove developer adhered to the electrostatic latent image bearing member. The image forming sections are disposed in series in close proximity to or contacting a transfer sheet conveying belt spanned rotatively and are configured to differentiate an amount of a lubricant to be supplied to the surface of each electrostatic latent image bearing member such that at least one image forming section is differentiated from other image forming sections.