Image forming apparatus with replenishment toner container which houses toner to which external additives are added
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United States of America Patent
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May 10, 2016
Issued Date -
N/A
app pub date -
Apr 2, 2015
filing date -
Apr 9, 2014
priority date (Note) -
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Abstract
An image forming apparatus includes: a replenishment toner container which houses toner; and a development device which forms an image by using the toner supplied from the replenishment toner container. At least two types of external additives are added to the toner. Of the two types of external additives, when an added amount of a first external additive is Wh (volume % with respect to the toner) and an added amount of a second external additive is Wl (volume % with respect to the toner), a value of Wh+Wl in initial toner of a developer housed in the development device in advance is larger than a value of Wh+Wl in replenishment toner of a developer housed in the replenishment toner container. The fluidity of the replenishment toner is higher than the fluidity of the initial toner.
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