Patent · US Active

Image forming apparatus and method of adjusting charge bias

US8103181B2 · kind B2 · utility

0Cited by

17References

19Claims

0Family size

Assignee

RICOH COMPANY, LTD. · JP

Inventors

Hitoshi Ishibashi · Tokyo, JP
Kohta Fujimori · Yokohama, JP
Shin Hasegawa · Yokohama, JP
Yushi Hirayama · Yokohama, JP
Nobutaka Takeuchi · Yokohama, JP
Shinji Kato · Tokyo, JP
Kayoko Tanaka · Chiba, JP
Naoto Watanabe · Kashiwa, JP
Kentaroh Tomita · Yokohama, JP
Satoru Komatsubara · Atsugi, JP
Akio Kosuge · Yokohama, JP

Key dates

Filing date	Jul 9, 2010
Grant date	Jan 24, 2012
Priority date	—
Expiry date	Jul 9, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG03G2215/021
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An image forming apparatus includes an image carrier configured to carry an image and a charger to which a direct current voltage overlapped with an AC voltage is applied as a charging bias to charge the image carrier. The charger is positioned in contact or contactlessly with the image carrier. The AC voltage applied to the charger in an adjustment of the AC voltage is not less than twice a charging start voltage Vth at which the image carrier starts to be charged.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.