Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
July 24, 2007
Patent Application Number
11089358
Date Filed
March 25, 2005
Patent Primary Examiner
Patent 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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