Appeal No. 96-1380
Application 08/219,189
to be either engaged with the BTR surface or disengaged
therefrom. The operation of this embodiment is depicted in
Figures 2A-2C, described in the specification at page 9, line
5 to p. 11, line 9.
Referring to Figure 2A, when the printing apparatus is in
the "transfer state," blade 28 engages the BTR surface and the
switch 38 connects the positive bias source 46 to BTR core 44
so as to create an electrostatic field that causes any
negatively charged toner particles and debris on the
photoconductive surface 12 of the photoconductive member 10 to
move to the surface of BTR 18, where it collects behind the
wiper blade. Figure 2B shows the next state, wherein the
wiper blade is moved out of engagement with the BTR surface so
as to permit the collected residual material 43 to be carried
by the BTR toward engagement with photoconductive surface 12.
When, as show in Figure 2C, the residual material 43 makes
contact with photoconductive surface 12, switch 38 connects
negative bias source 48 to the BTR core, thereby creating an
electrostatic field that causes material 43 to move from the
BTR surface to photoconductive surface 12, from which it will
be removed by cleaning station B (Fig. 1).
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Last modified: November 3, 2007