Appeal No. 95-3947
Application 07/812,530
Appellants claim a multilayer photoreceptor and state that it is for use in
electrophotographic imaging members (specification, page 1, lines 6-8). The photoreceptor
includes a support layer, a charge generating layer on the support layer, and a specified charge
transport dual layer on the charge generating layer. The charge transport dual layer, which
appellants also claim separately, includes a first transport layer and a thinner second transport
layer deposited on the first transport layer. Each transport layer comprises a charge transporting
polymer which contains charge transporting segments and inactive segments and includes a
polymeric arylamine compound. The charge transporting segments of the first charge
transporting polymer are about 30 to about 90 wt% of the total polymer, and those of the second
charge transporting polymer are about 5 to about 30 wt% of the total polymer. Appellants state
that the charge transporting segments are the segments which tend to get oxidized in the corona
atmosphere of an electrophotographic imaging device, and that by reducing the concentration of
these segments and increasing the concentration of more stable inactive segments in the second,
or top, transport layer, the top layer is less prone to degradation yet is effective for leaking
charges to the surface (specification, page 10, lines 10-22). Appellants’ claim 10, which is the
broadest claim and is directed toward the charge transport dual layer itself, is appended to this
decision.
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Last modified: November 3, 2007