FINE SPHERICAL SILICA POWDER AND ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER EXTERNAL ADDITIVE USING THE FINE SPHERICAL SILICA POWDER
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United States of America Patent
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N/A
Issued Date -
N/A
app pub date -
Jan 28, 2014
filing date -
Jul 29, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Provided is a suitable toner external additive which has an excellent spacer effect, without causing image defects in repeated image formation and which is suitable in preparing a toner with stable printing properties and to provide a fine spherical silica powder suitable for adding to the toner additive. A fine spherical silica power having an average particle size measured by a laser diffraction/scattering distribution measuring apparatus of 0.090 μm or more and 0.140 μm or less, a particle content ratio of 5.0% by mass or more and 25.0% by mass or less when the particle diameter is 0.150 μm or more, and a particle content ratio of 1.0% by mass or less when the particle diameter is 0.300 μm or more.
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
DENKI KAGAKU KOGYO KABUSHIKI KAISHA | TOKYO 103-8338 |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
HIDESHIMA, Masaaki | Omuta-shi, JP | 1 | 3 |
# of filed Patents : 1 Total Citations : 3 | |||
MIZUMOTO, Takahisa | Omuta-shi, JP | 6 | 8 |
# of filed Patents : 6 Total Citations : 8 | |||
SASAKI, Shuji | Omuta-shi, JP | 28 | 194 |
# of filed Patents : 28 Total Citations : 194 | |||
SONODA, Hideaki | Omuta-shi, JP | 3 | 22 |
# of filed Patents : 3 Total Citations : 22 |
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Patent Citation Ranking
- 3 Citation Count
- G03G Class
- 7.27 % this patent is cited more than
- 11 Age
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