JP2006071721A5 - - Google Patents

Claims (11)

Electrodes for electrostatically transporting the fine particles are arranged, and an electric substrate is provided for electrostatically transporting the fine particles to the development site of the image carrier on which the latent image is formed. In the developing device for developing the latent image of the image carrier,
Moving direction of fine particles to be conveyed electrostatically on the surface of the circuit board is in the developing region, a developing device which is a substantially perpendicular direction to the moving direction of said image bearing member. Electrodes for electrostatically transporting the fine particles are arranged, and an electric substrate is provided for electrostatically transporting the fine particles to the development site of the image carrier on which the latent image is formed. In the developing device for developing the latent image of the image carrier,
Moving direction of fine particles to be conveyed electrostatically on the surface of the circuit board is in the developing region, characterized in that it is in the range of ± 45 ° with respect to a direction perpendicular to the movement direction of said image bearing member Development device. The electric substrate prevents an electrostatic transfer electrode array for electrostatically transporting fine particles and movement of the fine particles electrostatically transported at the edge of the electrostatic transfer electrode array in a direction deviating from the electrostatic transfer direction. The developing device according to claim 1, further comprising a wall portion.   The developing device according to claim 3, wherein the wall portion is formed of a member that charges fine particles or a member that promotes charging.   The developing device according to claim 3, wherein the wall portion is formed of a polyimide-containing material that can be flexibly deformed. In the electric substrate , the first electrostatic transport electrode array and the first electrostatic transport electrode array disposed at the edge of the first electrostatic transport electrode array have different electrostatic transport directions of the fine particles. A second electrostatic transfer electrode array;
The first electrostatic transport electrode array electrostatically transports the fine particles in a predetermined electrostatic transport direction,
The second electrostatic transport electrode array is arranged such that the fine particles electrostatically transported by the first electrostatic transport electrode array deviate from the first electrostatic transport electrode array. The developing device according to claim 1, wherein the developing device is electrostatically conveyed in a direction to return to the electrode array. 3. The developing device according to claim 1, wherein the electric substrate has a portion that returns residual fine particles that have not been used in development at the development portion to the upstream of the development portion, and circulates the fine particles. The developing device according to claim 1, wherein a part of the electric substrate is located in an inner portion of the image carrier. A drive means having a voltage generating means for determining the electrostatic conveyance intensity of the electrical substrate, and a frequency generation means for determining the electrostatic conveyance speed of the electric board,
The driving unit variably controls at least one output value of an applied voltage value from the voltage generating unit or a frequency value from the frequency generating unit depending on whether or not development is executed. The developing device according to any one of claims 1 to 8. An image carrier on which a latent image is formed;
The developing device according to any one of claims 1 to 9, wherein the latent image is developed with a developer;
An image forming apparatus comprising:   11. The image according to claim 10, wherein a plurality of the developing devices are provided for each predetermined color, and the plurality of developing devices perform development on the image carrier in a predetermined order to form a full-color image. Forming equipment.