Apparatus to measure an amount of toner consumed and method...

Electrophotography – Diagnostics – Consumable

Reexamination Certificate

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Reexamination Certificate

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07088929

ABSTRACT:
A toner consumption measuring apparatus having an effective signal generating unit to receive inputs of printing data and a video clock signal to synchronize the printing data and to generate a count effective signal, a counting unit to count the generated count effective signal and to calculate a number of pixels of the printing data, a coefficient memory to store at least a toner consumption coefficient of a unit of pixel ‘K’ which is set in advance, and a printer control unit to determine an image pattern compensation coefficient by using the differences of numbers of the pixels of adjacent lines of a page in printing of every page, and calculating a toner consumption with applying a proper weight in accordance with the determined image pattern compensation coefficient.

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patent: 5459556 (1995-10-01), Acquaviva et al.
patent: 5655174 (1997-08-01), Hirst
patent: 5787320 (1998-07-01), Eun et al.
patent: 5802420 (1998-09-01), Garr et al.
patent: 02-272471 (1990-07-01), None
patent: 11-005300 (1999-01-01), None
patent: 11-227173 (1999-08-01), None
patent: 2002-328568 (2002-11-01), None

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