Appeal No. 2002-1066
Application No. 09/304,021
provides a method and apparatus for controlling a
moving knife in a continuous sheet cutting process for
cutting the continous [sic] sheet into predetermined
lengths wherein the moving knife is maintained in a
park position until a predetermined length of the
continuous sheet has passed the location where the cut
is made. . . . The moving knife starts from rest at
the park position and accelerates to a speed greater
than a speed synchronous with the material line then
decelerates to a speed synchronous with the material
line prior to cutting the continous [sic] moving sheet
of material into a predetermined length then operates
synchronous with the material line until the knife
returns to the park position.
The controller of Green includes, among other things, a
microprocessor 34 that utilizes the input of three pulse
generators to control rotary knife 18. Pulse generator
30 generates a series of electrical pulses as a function of the
length of continuous wallboard passing roller 28. These pulses
“represent[] the length of wallboard line that has been measured
since the accumulation of pulses generated by pulse generator 30
was last reset to zero” (column 3, lines 8-11). Pulse generator
36 generates pulses as a function of the distance of travel of
knife 18 from the park position. These pulses “represent the
distance of travel of knife 18 from the park position since the
accumulation of pulses generated by pulse generator 36 was last
reset to zero” (column 3, lines 18-21). Pulse generator 40
generates one pulse per revolution of knife 18 upon returning to
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Last modified: November 3, 2007