摘要:
In a developing apparatus provided with a developer container containing a developer, a rotary member holding the developer container and rotatively moving it relative to a developing position, an opening portion provided in the developer container and through which the developer is supplied or discharged, a valve swingable to open and close the opening portion, and a restricting wall restricting the movement of the valve in an opening direction by contacting with the valve when the valve is in an opened position, an irregularity portion is provided on at least one of the contact surface of the valve with the restricting wall and the contact surface of the restricting wall with the valve.
摘要:
An image forming apparatus includes a first developing device for developing an electrostatic image with a first developer including a non-transparent toner and a carrier; a second developing device for developing an electrostatic image with a second developer including transparent toner and carrier; a first supplying device for supplying a first supply developer including non-transparent toner and a carrier to the first developing device; a first supplying device for supplying a second supply developer including transparent toner and a carrier to the second developing device; a control device for superimposing a toner image of the transparent toner on the non-transparent toner image so as to reduce a height difference in toner layer or layers of the toner image provided by the non-transparent toner, wherein a carrier weight ratio in the first supply developer and a carrier weight ratio in the second supply developer are substantially equal to each other.
摘要:
An image forming apparatus includes a first image bearing member; a first developing means forming a toner image of transparent toner on an electrostatic latent image formed on the first image bearing member; a second image bearing member having an electrostatic capacity per unit area which is smaller than an electrostatic capacity per unit area of the first image bearing member; second developing means for forming a toner image of chromatic toner on an electrostatic latent image formed on the second image bearing member, wherein a maximum toner amount of the toner image formed on the first image bearing member is larger than a maximum toner amount of the toner image formed on the second image bearing member; and transferring means for transferring the transparent toner image and the chromatic toner image onto a transfer material.
摘要:
A developing device configured to carry out development of an electrostatic image using color toner particles and transparent toner particles includes color and transparent developing units configured to store toner particles, carrier particles, and additive particles and configured to carry out development of the electrostatic image; color and transparent developer replenishment containers configured to store replenishment developers including at least the toner particles and the carrier particles and configured to replenish developing units with the replenishment developers; and color and transparent developers openings provided at the developing units and configured to discharge the developers in the developing units outside the developing units while replenishing the developing units with the replenishment developers, wherein the carrier particle weight ratio of the transparent replenishment developer is higher than the carrier particle weight ratio of the color replenishment developer.
摘要:
The image forming apparatus includes a developing device, a movable member, a replenishment device, a developer replenishment path, and a conveyance screw so arranged within the developer replenishment path as not to come into contact with the internal wall of the developer replenishment path, wherein X (g) representing the quantity of the developer for replenishment present in the clearance section between the developer replenishment path and the conveyance screw, Y (g) representing the quantity of the developer in the developing device, Q(μC/mg) representing the absolute value of the electric charge per unit weight of the toner in the developing device, and A(μC/mg) representing the absolute value of the electric charge per unit weight of the toner relative to a 1% variation in the toner density satisfy the condition of a relationship of X≦(Y×Q)/(500×A).
摘要翻译:图像形成装置包括显影装置,可移动构件,补充装置,显影剂补充路径和输送螺杆,其布置在显影剂补充路径内,以不与显影剂补充路径的内壁接触,其中 表示显影剂补充路径和输送螺杆之间的间隙部分中存在的用于补充的显影剂的量的X(g),表示显影装置中的显影剂的量的Y(g),表示 显影装置中的调色剂的每单位重量的电荷的绝对值,和表示调色剂单位重量的电荷的绝对值相对于调色剂浓度1%的变化的A(μC/ mg)满足 X <=(YxQ)/(500xA)的关系的条件。
摘要:
A charging apparatus has a movable image bearing member, a first charging member for charging the image bearing member, and a second charging member provided upstream of the first charging member with respect to the direction of movement of the image bearing member, the second charging member having an elastic rotary member rubbing against the image bearing member.
摘要:
A developing device configured to carry out development of an electrostatic image using color toner particles and transparent toner particles includes color and transparent developing units configured to store toner particles, carrier particles, and additive particles and configured to carry out development of the electrostatic image; color and transparent developer replenishment containers configured to store replenishment developers including at least the toner particles and the carrier particles and configured to replenish developing units with the replenishment developers; and color and transparent developers openings provided at the developing units and configured to discharge the developers in the developing units outside the developing units while replenishing the developing units with the replenishment developers, wherein the carrier particle weight ratio of the transparent replenishment developer is higher than the carrier particle weight ratio of the color replenishment developer.
摘要:
A developing apparatus for developing an electrostatic image with light chromatic toner and dark chromatic toner which have the same hue, the developing device includes a light color developing device for accommodating a developer containing the light chromatic toner and carrier to develop the electrostatic image; a dark color developing device for accommodating a developer containing the dark chromatic toner and carrier to develop the electrostatic image; light color developer supply container accommodating a developer containing the light chromatic toner and the carrier to be supplied to the light color developing device; and dark color developer supply container accommodating a developer containing the dark chromatic toner and the carrier to be supplied to the dark color developing device, wherein the developer in the light chromatic toner supply container and the developer in the dark chromatic toner supply container have carrier weight ratios which are different from each other.
摘要:
In a developing apparatus provided with a developer container containing a developer, a rotary member holding the developer container and rotatively moving it relative to a developing position, an opening portion provided in the developer container and through which the developer is supplied or discharged, a valve swingable to open and close the opening portion, and a restricting wall restricting the movement of the valve in an opening direction by contacting with the valve when the valve is in an opened position, an irregularity portion is provided on at least one of the contact surface of the valve with the restricting wall and the contact surface of the restricting wall with the valve.
摘要:
The image forming apparatus has an electrophotographic photosensitive member and a developing device for using a developer including toner and carrier, wherein the developing device develops an electrostatic image on a photosensitive member by putting the developer forming a magnetic brush on a developer bearing member including magnetic field generation device inside in contact with the photosensitive member, and when a contact pressure of the developer on the developer bearing member against the photosensitive member is P (Pa), a circumferential velocity of the developer bearing member is VSl (mm/s), a circumferential velocity of the photosensitive member is VDr (mm/s), and an elastic deformation ratio of the photosensitive member is W (%), a degree of sliding of the photosensitive member by the developer represented ranges from 650 to 60500.