Developing apparatus including agitating member

Electrophotography – Image formation – Development

Reexamination Certificate

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Details

C399S256000, C399S265000, C399S279000

Reexamination Certificate

active

07003249

ABSTRACT:
A developing apparatus includes a rotatable, developer carrying body for carrying a one-component developer and a rotatable, agitating member for agitating the one-component developer. The one-component developer is magnetic toner at least containing a bonding resin and magnetic iron oxide. When wettability of the magnetic toner relative to a mixture solution of methanol and water is measured at the transmittance of light having a wavelength of 780 nm, a methanol concentration at the transmittance of 80% is within the range of 45 to 65 volume %, and wherein 0.1≦b/a≦0.2 is established where a (rps) denotes the rotation speed of the developer carrying body, and b (rps) denotes the rotation speed of the agitating member.

REFERENCES:
patent: 5466555 (1995-11-01), Taguchi et al.
patent: 6197470 (2001-03-01), Tamura
patent: 2001/0009624 (2001-07-01), Abe et al.
patent: 6-230604 (1994-08-01), None
patent: 6-242630 (1994-09-01), None
patent: 7-281478 (1995-10-01), None
patent: 2000-147832 (2000-05-01), None
patent: 2000-284522 (2000-10-01), None
patent: 2000-310884 (2000-11-01), None
patent: 2001-201931 (2001-07-01), None
patent: 2002-278147 (2002-09-01), None

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