Toner and image-forming method therewith
AssigneeZeon Corporation
InventorMuneharu Itoh
Life of this patent
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Abstract
A toner for an image-forming apparatus and method which apparatus has a cleaning means with a cleaning blade to remove a residual toner remaining on a surface of a photoconductive member after transfer; the toner being a mixture of a colored polymer particle and an external additive. The colored polymer particle has an average circle degree in the range of 0.95-0.995 and a volume average particle diameter in the range of 3-8 μm. The toner has an absolute value of charge amount in the range of 20-70 μC/g in a toner layer formed on a developing roll when the toner is used with the image-forming apparatus.
Claims19
A toner for an image-forming apparatus, which has a cleaning means with a cleaning blade to remove a residual toner remaining on a surface of a photoconductive member after transfer;
- the toner comprising:
- a colored polymer particle having an average circle degree in the range of 0.95-0.995 and a volume average particle diameter in the range of 3-8 μm, and
- an external additive;
- wherein the toner has an absolute value of charge amount in the range of 20-70 μC/g in a toner layer formed on a developing roll when the toner is used with the image-forming apparatus.
An image-forming method comprising the steps of:
- providing an image-forming apparatus having a cleaning means with a cleaning blade to remove a residual toner remaining on a surface of a photoconductive member after transfer;
- supplying a toner to the image-forming apparatus,
- which toner comprises
- a colored polymer particle having an average circle degree in the range of 0.95-0.995 and a volume average particle diameter in the range of 3-8 μm and
- an external additive,
- wherein the toner has an absolute value of charge amount in the range of 20-70 μC/g in a toner layer formed on a developing roll when the toner is used with the image-forming apparatus;
- and
- forming an image by the toner and the image-forming apparatus.
An image-forming apparatus comprising a cleaning means with a cleaning blade to remove a residual toner remaining on a surface of a photoconductive member after transfer,
- the cleaning blade having a hardness (JIS-A) in the range of 60-90.
Dependencies are inferred from the claim text.