摘要:
The present invention relates to a developing unit including a developer container accommodating a developer; a developer bearing member bearing the developer supplied from the developer container; a magnetic-field generation member disposed in the developer bearing member, the magnetic-field generation member having a magnetic-field generation area generating a magnetic field for attracting the developer to the developer bearing member; and a sealing member disposed at the developer container, the sealing member preventing the developer from leaking from a gap between a longitudinal end of the developer bearing member and the developer container. An end of the magnetic-field generation area of the magnetic-field generation member is disposed inside an inner end of the sealing member in the longitudinal direction of the developer bearing member. The developer bearing member develops a latent image formed on the image bearing member with the developer while keeping in contact with the image bearing member.
摘要:
A cleaning unit includes a cleaning frame, a drum, a sheet member coming in contact with a surface of the drum, and an adhesive sealing member compressed between the cleaning frame, the drum, and the sheet member. The cleaning unit includes an end seal portion that is integrally molded with the cleaning frame by injection molding of a resin material, and the end seal portion is compressed and deformed between the cleaning frame and the adhesive sealing member and between the cleaning frame and the sheet member.
摘要:
A developing device including a housing, a developing roller, a seal member arranged between the housing and each end of the developing roller, and a layer thickness regulation blade including a blade main body, and a blade rubber part protruding from a surface of the blade main body and contacting the developing roller, wherein an end surface of the blade rubber part in an axial direction of the developing roller is in contact with an inner surface of the seal member in the axial direction, and wherein the blade rubber part has an inclined surface at each end thereof in the axial direction, the inclined surface extending toward an upstream side in a rotating direction of the developing roller while extending toward an outer side in the axial direction so as to extend to the seal member.
摘要:
There is provided a developing device including a developing roller, a housing configured to support the developing roller, a first seal member arranged between the developing roller and the housing at each end portion of the developing roller in an axial direction thereof, and a second seal member arranged between the developing roller and the housing at an inner side of each first seal member in the axial direction and having a smaller frictional force per unit area to be applied with respect to the developing roller than the first seal member.
摘要:
A developing device includes a developing roller including a base and a surface layer formed on the base, the surface layer including a polyurethane resin having a fluorine group and a polyfunctional isocyanurate structure, a toner storage chamber being partially in contact with the developing roller and to support the developing roller, and a sealing member provided at opposed ends of an end portion of the toner storage chamber in a rotating axis direction of the developing roller, and to seal in toner moving to the end portion of the toner storage chamber, the sealing member before use having a coefficient of static friction in a range of from 0.08 to 0.19.
摘要:
A toner carrier includes a metal core, a barrel formed on an outer circumference of the metal core and including at least an elastic layer, and a coating formed on outer circumferences of both ends of the barrel. The coating has a thickness and a width of an outer circumference of the coating is different from a width of an inner circumference of the coating. The width is from an end surface of the barrel along an axis of the barrel, and the width of the outer circumference is larger than the width of the inner circumference so that the end surface of the coating is reversely inclined.
摘要:
A sealing member for use in an electrophotographic image forming device according to one example embodiment includes a molded body formed of an elastomer material and internal lubricant additives. The lubricant additives include at least about 20% by weight of the molded body. The lubricant additives include a wet lubricant, a dry lubricant and rounded beads.
摘要:
An image forming apparatus of the present disclosure includes a developing device, a support frame, a developer supply mechanism, and a shutter member. The developing device has a developer bearing member that supplies a developer to the image bearing member. The support frame is capable of disposing the developing device selectively at a mounting/demounting position and at a developing position. The shutter member opens a replenishment port formed at the connection portion in tandem with the movement of the developing device from the mounting/demounting position to the developing position and closes the replenishment port in tandem with the movement of the developing device from the developing position to the mounting/demounting position. A direction in which the developing device is moved is different from a direction in which the shutter member performs the opening/closing of the replenishment port.
摘要:
A developing apparatus includes a housing, a developing roller, a supply roller, and a thickness regulating member. The housing is configured to accommodate developer that includes developer particles having a mean volume diameter. The developing roller is rotatably supported in the housing and has a peripheral surface configured to carry the developer. The supply roller is rotatably supported in the housing, contacts the developing roller, and configured to supply the toner to the developing roller. The thickness regulating member includes a contact member contacting the peripheral surface. The contact member is configured to regulate a thickness of the developer on the peripheral surface such that an average of the thickness of the developer on the peripheral surface becomes smaller than or equal to the mean volume diameter.
摘要:
A developing apparatus includes a housing; a developing roller; a seal member, and a layer thickness regulating member that contacts a circumferential surface of the developing roller via developer and regulates a thickness of a developer layer on the circumferential surface of the developing roller. The seal member has a sliding contact portion made of fiber having elasticity and sliding-contacting the circumferential surface of the developing roller. The layer thickness regulating member has one end portion that is supported by the housing and the other end portion to which a bent portion is formed to face the seal member, and the bent portion is configured to enter the sliding contact portion.