Loading patent…
AssigneeCanon Kabushiki Kaisha
InventorsGenya Anan, Kenichi Yamauchi, Hidenori Satoh
Estimating the term…
A developing roller is provided having a surface that has excellent effect of suppressing exudation of low molecular weight substances from an elastic body, excellent toner release properties, and sufficient flexibility in which cracks do not easily occur even by repeated image formation. The developing roller carries and conveys toner to develop electrostatic latent images on a photosensitive drum with the toner and includes in this order a mandrel, an elastic layer, and a surface layer. The surface layer includes a silicon oxide film containing carbon atoms chemically bonded to silicon atoms. The silicon oxide film has an abundance ratio of oxygen atoms forming chemical bonds with silicon atoms to silicon atoms (O/Si) of 0.65 or more and 1.95 or less, and an abundance ratio of carbon atoms forming chemical bonds with silicon atoms to silicon atoms (C/Si) of 0.05 or more and 1.65 or less.
A developing roller for carrying and conveying toner and developing an electrostatic latent image on a photosensitive drum with the toner, the developing roller comprising in this order a mandrel, an elastic layer, and a surface layer, wherein the surface layer comprises a silicon oxide film containing a carbon atom chemically bonded to a silicon atom, and wherein the silicon oxide film has an abundance ratio of an oxygen atom forming a chemical bond with a silicon atom to a silicon atom (O/Si) of 0.65 or more and 1.95 or less, and an abundance ratio of the carbon atom chemically bonded to a silicon atom to a silicon atom (C/Si) of 0.05 or more and 1.65 or less.
Dependencies are inferred from the claim text.