Method for developing electrostatic latent images
AssigneeMita Industrial Co., Ltd.
InventorsHitoshi Nishihama, Katsuhiko Gotoda, Minoru Motomura, Takanobu Nakajima, Tatsuo Aizawa
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Abstract
Method and apparatus for developing an electrostatic latent image formed on the surface of an electrostatic latent image-bearing material by applying a powdery developer, wherein the surface of a developer-retaining member retaining a layer of the powdery developer thereon is brought into rolling contact with the surface of the image-bearing material in such a relation that a reservoir zone of the developer is formed at least upstream of the zone of rolling contact between the two surfaces, and the developer in the reservoir zone is physically disturbed.
Claims21
A method for developing an electrostatic latent image formed on the surface of an image-bearing material by applying a powdery developer thereto, which comprises bringing the surface of a developer-retaining member retaining a layer of the powdery developer on its surface into rolling contact with the surface of said image-bearing material through the developer in such a relation that a reservoir zone of the developer is formed upstream of and adjacent to the rolling contact zone of both surfaces, and physically disturbing the developer in said reservoir zone to cause the developer to make an irregular motion.
A method for developing an electrostatic latent image formed on the surface of an image-bearing material by applying a powdery developer thereto, which comprises magnetically retaining a layer of a relatively conductive one-component developer having a resistivity of not more than 10.sup.13 ohms.cm on the surface of a hollow cylindrical developer-retaining member having an insulating coating with a resistance of 10.sup.3 to 10.sup.9 ohms per cm.sup.2 and being kept at a grounded potential by means of a magnet disposed within said developer-retaining member and having a plurality of poles of opposite polarities arranged alternately on its periphery;
- bringing the surface of said developer-retaining member into rolling contact with the surface of said image-bearing material through a layer of the developer in such a relation that a reservoir zone of the developer is formed at least upstream of and adjacent to the rolling contact zone of both surfaces;
- and physically disturbing the developer in said reservoir by rotating said magnet.
Dependencies are inferred from the claim text.