초록 ▼

An electrophotographic process cartridge develops an electrostatic latent image with two layers or less of polymeric toner. The electrophotographic process cartridge includes a charging roller for uniformly distributing a layer of electrical charge on an outer surface of a photosensitive drum, a dev

An electrophotographic process cartridge develops an electrostatic latent image with two layers or less of polymeric toner. The electrophotographic process cartridge includes a charging roller for uniformly distributing a layer of electrical charge on an outer surface of a photosensitive drum, a developing roller for transferring particles of polymeric toner each having a substantially spherical shape onto the outer surface of the photosensitive drum, and a control roller for engaging an outer surface of the developing roller to enable formation of two layers or less of polymeric toner particles on the outer surface of the developing roller. The particles of polymeric toner are transferred from the outer surface of the developing roller to the outer surface of the photosensitive drum for a printing operation, and remaining toner particles are transferred from the outer surface of the photosensitive drum back to the outer surface of the developing roller after the printing operation by a bias voltage applied to the developing roller.

대표청구항 ▼

An electrophotographic process cartridge, comprising: a photosensitive drum; charging means for uniformly distributing a layer of electrical charge on an outer surface of said photosensitive drum; a developing roller for transferring particles of polymeric toner each having a substantially spherical

An electrophotographic process cartridge, comprising: a photosensitive drum; charging means for uniformly distributing a layer of electrical charge on an outer surface of said photosensitive drum; a developing roller for transferring particles of polymeric toner each having a substantially spherical shape onto said outer surface of said photosensitive drum; and control means for engaging an outer surface of said developing roller to enable formation of two layers or less of said particles of said polymeric toner on said outer surface of said developing roller, said particles of said polymeric toner being transferred from said outer surface of said developing roller to said outer surface of said photosensitive drum and being transferred from said outer surface of said photosensitive drum back to said outer surface of said developing roller in dependence upon a voltage applied to said developing roller.