Appeal No. 96-3803
Application No. 08/128,245
Hikake et al. (Hikake) 5,066,558 Nov. 19, 1991
Inoue et al. Inoue) 5,077,169 Dec, 31,
1991
Konishirouku Photo JP 62-289851 Dec. 16, 1987
Appellants' claimed invention is directed to a dry
electro-statographic developer composition comprising a toner
which comprises inorganic microparticles, such as fumed
silica, that have certain recited characteristics. In
particular, the arithmetic product of the microparticles' BET
surface (A) and methanol value (B) is greater than 10,000.
Also, the ratio of the apparent density over the bulk density
of the toner composition is greater than or equal to 0.2.
According to appellants, the dry developer composition of the
present invention exhibits "superior performance over the
prior art dry developer compositions using such toner
particles in terms of overall quality of the final
electrostatographic print, and in terms of overall performance
in the electrostatographic process" (page 4 of principal
brief).
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