This invention provides a paperboard with an improved score line, the method
for making the improved score line, and the apparatus for imparting the improved
score line. The score line makes the process of folding a flat paperboard into
a corner an easier and more consistent process. The score is a V-shaped groove
fashioned from a bar score line flanked by two parallel slit cut lines. The method
for creating the score line includes utilizing different scoring hubs for bar scoring
and slit scoring the paperboard. The apparatus for creating the bar score is a
four shaft slitter-scorer having multiple shafts in series, wherein each shaft
has at least one hub for slit scoring, bar scoring or supporting the paperboard.
