Appeal No. 96-0327
Application 07/961,795
The appellants argue that while the claimed invention
requires a control signal for determining the rate of
processing of the sheet processing apparatus, Chang discloses
only a method for measuring the speed of a mail piece. The
argument is erroneous and misplaced. Chang discloses (bottom
of column 5 to the top of column 6) that upon arrival of the
leading edge of an envelope to the second speed sensor 68, the
microcomputer estimates the mail speed and determines the new
conveyor IN-SPEED for the mailing machine 10, and also
determines the new PEAK-DRUM-SPEED of the mailing machine
relative to the new IN-SPEED. In lines 46-52 of column 6,
Chang further discloses that as the leading edge of an
envelope arrives at the start slowdown point (Q), the
microcomputer sets the conveyor GOAL SPEED to equal to the
computed desired PEAK-DRUM-SPEED and sets variables to ramp
down conveyor stepper motor 24 of the transport system 20 in
mailing machine 10. Accordingly, it is clear that the
transport system 20 in the mailing machine 10 is caused to
slow down in response to the detected mail speed when an
envelope gets sufficiently close to the print drum of the
mailing machine. Chang does not simply measure or estimate
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