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US 2012/0070170 A1Published application
Developing device and image forming apparatus
AssigneeSharp Kabushiki Kaisha
InventorToshimasa HAMADA
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AssigneeSharp Kabushiki Kaisha
InventorToshimasa HAMADA
Estimating the term…
A developing device which includes a developing roller which supplies a toner to a photoreceptor and a supply roller which performs supply of a toner to the developing roller and peeling of a toner from the developing roller, and applies a bias voltage to the developing roller so as to develop an electrostatic latent image formed on the photoreceptor with a toner. The developing device includes a first current measuring portion which measures a value of a current flowing in the developing roller, a second current measuring portion which measures a value of a current flowing in the supply roller, and a control portion which calculates a toner charging amount on the developing roller and a toner peeled amount by the supply roller based on measured results by the first current measuring portion and the second current measuring portion.
A developing device of a single-component system which includes a developing roller which supplies a toner to an electrostatic latent image carrier and a supply roller which performs supply of a toner to the developing roller and peeling of a toner from the developing roller, and applies a bias voltage to the developing roller so as to develop an electrostatic latent image formed on the electrostatic latent image carrier with the toner, comprising:
Dependencies are inferred from the claim text.