Appeal No. 2000-1639
Application No. 08/923,449
During any given day, the production order
changeover may occur as often as 6 to 7 times. The
repetitive acceleration and deceleration of the speed
of the double facer machine over a wide speed range
with its attendant corresponding changes on the
apparatus for controlling transfer of heat to the web
is considered to be undesirable from a quality
standpoint. More uniform quality is attained if the
double facer machine speed remains at a constant.
[Column 1, lines 10-27.]
It is therefore an objective of Craemer
[to create] a gap in a paperboard web which minimizes
one operating characteristic which has a tendency to
affect quality [i.e., repetitive acceleration and
deceleration of the double facer machine] while at the
same time assuring that a gap will be maintained
between shingled sheets of one production order and
shingled sheets of the next production order. [Column
2, lines 37-42.]
Craemer’s method of providing a gap between production
orders is accomplished
by increasing the speed of the shingling conveyor to a
second substantially higher speed prior to the last
sheet of the web section being deposited on the
shingling conveyor. When the first sheet of the new
production order is deposited on the shingling
conveyor, the speed of the shingling conveyor is
decreased from said second speed to said first speed
thereby maintaining a gap on the shingling conveyor
between the sheets of the old production order and the
next production order. [Column 2, lines 21-30.]
In addition, the slitter-scorer (16) and cut-off (18)
located downstream of the double facer (12) may be adjusted at
8
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Last modified: November 3, 2007