Toner for developing electrostatic image

Details Toner for developing electrostatic image Toner for developing electrostatic image

2006-10-31

2009-06-02

Goodrow, John L (Department: 1795)

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

C430S110300, C430S111400

Reexamination Certificate

active

07541127

ABSTRACT:
The present invention aims to provide a toner for developing electrostatic image which is excellent in image reproducibility and further in cleaning performance. A toner for developing electrostatic image comprising a colored particle containing a binder resin and a colorant, and an external additive, wherein the toner for developing electrostatic image has a volume average particle diameter of 4.0 to 8.0 μm and an average circularity of 0.940 to 0.980, and wherein the toner for developing electrostatic image has a uniaxial collapsing stress of 0.8 to 1.5 kPa and an internal frictional angle of 30 to 45° when a maximum consolidation stress is 0.

REFERENCES:
patent: 6649315 (2003-11-01), Takasaki
patent: 7422833 (2008-09-01), Niwa et al.
patent: 2004/0143036 (2004-07-01), Takano et al.
patent: 2005/0058924 (2005-03-01), Miyakawa
patent: 2006/0154163 (2006-07-01), Kidokoro
patent: 2003-295498 (2003-10-01), None
patent: 2003-330218 (2003-11-01), None
patent: 2004-177747 (2004-06-01), None
patent: 2005-10723 (2005-01-01), None

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