Toner evaluation method, toner cartridge, and image forming apparatus
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United States of America Patent
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Jul 24, 2007
Grant Date -
Oct 6, 2005
app pub date -
Mar 25, 2005
filing date -
Mar 30, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A toner evaluation method that enables accurate evaluation of fixation performance of toner such as low temperature fixability and offset resistance, and a toner cartridge and an image forming apparatus adopting the toner positively evaluated by the evaluation method are provided. Toner is formed into a disc-shaped pellet. After preserved at a predetermined temperature, the pellet is compressed by a predetermined amount at a constant speed. If the maximum load (compression resistance) measured during the compression is a predetermined value or below, the minimum fixing temperature of the toner is relatively low.
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