In web offset lithography, an in-line means of perforating or punching slits in the spine edge of a paper web to facilitate the penetration of adhesive during subsequent perfect binding. See Perfect Binding. See also Notch Binding.
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In web offset lithography, an in-line means of perforating or punching slits in the spine edge of a paper web to facilitate the penetration of adhesive during subsequent perfect binding. See Perfect Binding. See also Notch Binding.