The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 2011
Filed:
Jan. 30, 2008
Takeshi Yamamoto, Yokohama, JP;
Manami Haraguchi, Yokohama, JP;
Kenta Kubo, Suntou-gun, JP;
Yoshinobu Baba, Yokohama, JP;
Koh Ishigami, Mishima, JP;
Takeshi Yamamoto, Yokohama, JP;
Manami Haraguchi, Yokohama, JP;
Kenta Kubo, Suntou-gun, JP;
Yoshinobu Baba, Yokohama, JP;
Koh Ishigami, Mishima, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus, wherein the following formulae are satisfied: where (M/S): a toner bearing amount in a maximum density image portion of a photosensitive drum, (Q/M): an average charge amount of the toner in the maximum density portion, Vc: an absolute value of a potential difference between a DC-component of a developing bias and the maximum density portion, Lt: a toner layer thickness of the maximum density portion, Ld: a drum thickness, εt: a relative permittivity of the toner layer, εd: a relative permittivity of the drum, εa vacuum permittivity, Dtmax: a transmission density in a maximum density image portion on the paper after fixation, Dt: a transmission density in an image on the paper when the toner bearing amount on the paper after fixation is 0.1 mg/cm, and λ: a transfer efficiency of the toner,