Conductive roller, and process cartridge and electrophotographic apparatus which have conductive roller.U.S. patent: 7,171,142 Issued: January 30, 2007 Inventors: Kawakami, et al. Assigned: Canon Kasei Kabushiki Kaisha Key statement: In a conductive roller having a conductive substrate, a conductive elastic layer and a conductive cover layer, the conductive cover layer is formed of a seamless tube containing a thermoplastic A polymer material that turns to liquid when heated and becomes solid when cooled. There are more than 40 types of thermoplastics, including acrylic, polypropylene, polycarbonate and polyethylene. polymer, the surface of the conductive roller is coated with an inorganic compound inorganic compound Any substance in which two or more chemical elements other than carbon are combined, nearly always in definite proportions (see bonding), as well as some compounds containing carbon but lacking carbon-carbon bonds (e.g., carbonates, cyanides). the particle surfaces of which have been subjected to hydrophobic hydrophobic /hy·dro·pho·bic/ (-fo´bik) 1. pertaining to hydrophobia (rabies). 2. not readily absorbing water, or being adversely affected by water. 3. treatment, and the roller having been coated therewith there·with adv. 1. With that, this, or it. 2. In addition to that. 3. Archaic Immediately thereafter. Adv. 1. has a glossiness of from 7.5% or more to less than 22.0%. This conductive roller can make toner and external additives adhere less to the roller surface, can prevent the faulty images due to the adhesion of photosensitive-member abrasion dust and can well perform charging in the image reproduction from the initial stage to the last. [ILLUSTRATION OMITTED] |
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