Electrophotolithographic image forming device and image developing method
AssigneeSamsung Electronics Co., Ltd.
InventorsNaonori Kurogawa, Masahiko Itaya, Kyu-Cheol Shin, Tsutomu Teraoka, Tsutomu Sasaki, Myung-Kook Ahn
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Abstract
An electrophotographic image forming device is provided which includes an image holder on which an electrostatic latent image is formed. A magnetic roller has a magnetic brush including nonmagnetic toner and a magnetic carrier using a magnetic force. Donor rollers are provided which have toner layers that are received from the magnetic roller on an outer circumference of each of the donor rollers. The donor rollers are located opposite to the image holder to develop the toner onto the electrostatic latent image.
Claims11
An electrophotographic image forming device comprising:
- an image holder on which an electrostatic latent image is formed;
- a magnetic roller forming a magnetic brush including nonmagnetic toner and a magnetic carrier using a magnetic force;
- and
- a plurality of donor rollers including a toner layer received from the magnetic roller on an outer circumference of each of the donor rollers located opposite to the image holder to develop the toner onto the electrostatic latent image.
A hybrid developing method comprising the steps of:
- forming a toner layer on an outer circumference of each of a plurality of donor rollers from toner received from a magnetic brush comprised of a magnetic carrier and nonmagnetic toner formed by a magnetic roller;
- supplying toners on the plurality of donor rollers to an electrostatic latent image on an image holder to perform image development via a developing bias voltage applied to the plurality of donor rollers.
An image forming device comprising:
- an image holder on which a latent image is formed;
- a plurality of magnetic rollers forming a magnetic brush including nonmagnetic toner and a magnetic carrier using a magnetic force;
- and
- a plurality of donor rollers including a toner layer received from the magnetic roller on an outer circumference of each of the donor rollers located opposite to the image holder to develop the toner onto the latent image, wherein at least one of the plurality of donor rollers has a diameter different from diameters of the other donor rollers.
Dependencies are inferred from the claim text.