US Patent 7515844 Image density control method and image forming apparatus

Patent 7515844 was granted and assigned to RICOH COMPANY,LTD. on April, 2009 by the United States Patent and Trademark Office.

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Patent Inventor Names

Kayoko Tanaka0

Kazumi Kobayashi0

Kiichirou Shimizu0

Kohta Fujimori0

Nobutaka Takeuchi0

Shin Hasegawa0

Shinji Kato0

Takashi Enami0

Yuji Hirayama0

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Patent abstract

An image density control method for an image forming apparatus in which, in order to keep the development capability constant over time, the toner density in the developer is manipulated to an appropriate range by changing the toner density control reference value in accordance with the toner replacement amount in a fixed time period by ascertaining changes in the image coverage of the output images, and by changing the image forming conditions at predetermined execution intervals.

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Official Website

https://pdfpiw.uspto.gov/.piw?Docid=075158440

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