Electrophotography – Diagnostics – Consumable
Patent
1996-09-25
1998-08-18
Pendegrass, Joan H.
Electrophotography
Diagnostics
Consumable
399 53, 324452, G01R 2924, G03G 1500
Patent
active
057970629
ABSTRACT:
A measuring device for amount of charge of developer includes an upper electrode, a lower electrode provided under the upper electrode, which are provided in parallel so as to face each other, flying electric field voltage application unit for applying a flying electric field voltage to the upper electrode, for generating an electric field so as to fly developer from the lower electrode to the upper electrode, current detection unit for detecting a current flowing in the upper electrode, and arithmetic unit for computing a total amount of charge of the developer adhering to the upper electrode based on a change in amount of current detected by the current detection unit, wherein a current that generates as a toner T adheres to the upper electrode is detected by the current detection unit, and based on a change in amount of the current, a total amount of charge of the developer adhering to the upper electrode is computed by the arithmetic unit. As a result, the measuring device for amount of charge of developer can be obtained at low cost.
REFERENCES:
patent: 4242434 (1980-12-01), Hirakura et al.
patent: 4343548 (1982-08-01), Bares et al.
patent: 4397184 (1983-08-01), Bankert et al.
patent: 5034775 (1991-07-01), Folkins
patent: 5486900 (1996-01-01), Wada et al.
Published Japanese Patent Application No. 287169, Published Dec. 14, 1987, T. Kyosuke, et al.
Published Japanese Patent Application No. 25154, Published Jan. 27, 1989, H. Nakamura, et al.
Published Japanese Patent Application No. 25772, Published Jan. 29, 1992, Y. Tabata.
Taniguchi Keiji
Wada Takasumi
Yamamoto Yo-ichi
Conlin David C.
Daley, Jr. William J.
Pendegrass Joan H.
Sharp Kabushiki Kaisha
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