Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yushi Mikuriya0
Keiji Komoto0
Takeshi Kaburagi0
Yasushi Katsuta0
Emi Tosaka0
Date of Patent
January 9, 2007
0Patent Application Number
108084010
Date Filed
March 25, 2004
0Patent Primary Examiner
Patent abstract
A toner includes toner particles and an inorganic fine powder mixed with the toner particles. The toner particles contain a binder resin, a coloring agent, a releasing agent, and a sulfur-containing resin. The toner particles contain at least one element selected from the group consisting of magnesium, calcium, barium, zinc, aluminum, and phosphorus and satisfy the relationship:4≦T/S≦30wherein T represents the total content of the element in ppm, and S represents the content of sulfur in ppm. The weight-average particle diameter (D4) of the toner is in the range of 3 to 10 μm. The average circularity of the toner is within the range of 0.950 to 0.995.
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