Developing device
AssigneeOki Data Corporation
InventorsTetsu Koyama, Yoshitatsu Okiyama, Teruaki Kuroda
Life of this patent
Estimating the term…
Abstract
To prevent irregular print density resulting from an uneven toner layer, a plurality of cylindrical members 31 formed like rollers are arranged in a manner to contact the sponge roller 22. When the residual toner on the surface of the developing roller 21 is scraped off by the sponge roller 22, the cylindrical members 31 push the toner away without allowing the toner to clot inside the sponge roller 22. Consequently, the sponge roller's performance to remove toner from itself to the developing roller 21 can be preserved for a long time.
Claims12
A developing device for supplying, by a developer carrying body, a developer to an electrostatic latent image formed on a photosensitive body by exposure by exposing means after said photosensitive body is charged by charging means, comprising:
- a developer supplying member to supply a developer to said developer carrying body and to separate said developer remaining on said developer carrying body;
- and
- developer removing means for contacting said developer supplying member and for removing said developer adhering to said developer supplying member.
A developing device for supplying, by a developer carrying body, a developer to an electrostatic latent image formed on a photosensitive body by exposure by exposing means after said photosensitive body is charged by charging means, comprising:
- a controller for changing a voltage applied to said developer carrying body so that a difference between a preliminary charging voltage applied to said photosensitive body and an applied voltage of said developer carrying body is smaller in preliminary charging than in print charging.
Dependencies are inferred from the claim text.