Toner remaining amount detecting device, toner remaining amount detecting method, process cartridge and electrophotographic image forming apparatus
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United States of America Patent
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-
Jul 2, 2002
Issued Date -
N/A
app pub date -
Sep 4, 2001
filing date -
Nov 13, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A toner remaining amount detecting device used for an electrophotographic image forming apparatus to sequentially detect an amount of toner in a toner containing portion, includes a first electrode disposed along a path in which an amount of toner contained in the toner containing portion for containing the toner is decreased upon consumption, a second electrode disposed so that the toner in the toner containing portion can exist between the first and second electrodes when the toner is contained in the toner containing portion, and a capacitance-detecting device for sequentially detecting a change in capacitance between the first and second electrodes, wherein the amount of the toner in the toner containing portion is detected sequentially.
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