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US 2002/0177061 A1Published application
Carrier for electrophotographic developer and developer containing the same
AssigneePowdertech Co., Ltd.
InventorsHiromichi Kobayashi, Tsuyoshi Itagoshi, Yasuhiko Kataoka, Yuji Sato
Life of this patent
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Abstract
A carrier for an electrophotographic developer which has a flowability index F1, represented by formula (1), of 63 to 75 sec/(50·cm3) and a flowability index F2, represented by formula (2), of 30 to 100 Oe·g/cm3: F1=AD×FR (1) F2=AD×Hc (2) wherein AD is an apparent density (g/cm3); FR is a flow rate (sec/50 g); and Hc is a coercive force (Oe).
Claims7
A carrier for an electrophotographic developer which has a flowability index F1, represented by formula (1), of 63 to 75 sec/(50·cm3) and a flowability index F2, represented by formula (2), of 30 to 100 Oe·g/cm3:
- F1=AD×FR (1)F2=AD×Hc (2)
- wherein AD is an apparent density (g/cm3);
- FR is a flow rate (sec/50 g);
- and Hc is a coercive force (Oe).
1 more element
Dependencies are inferred from the claim text.