SNS: The Heart of Understanding and Applying Slitting" is a new PowerPoint presentation by Dominique Gallou, product manager for Cincinnati-based Mario Cotta, which is exclusively available at www.convertingmagazine.com

SNS® is an acronym for Spatial Nip-Point Stability. It is defined as: 1) All points on a blade's circumference are capable of slicing a web; 2) Only one point in the Spatial Frame of Reference of the slitter/rewinder, as originally designed, will act as both a nip and slitting point. This is the Slitting Nip-Point; and 3) This point is a mathematical point, that is, without dimensions, explains Gallou.

The Spatial Nip-Point is located at the junction of the web, upper slitter blade and slitter band. This location is an integral part of the original design of the slitting section. It cannot be changed or moved, unless one changes the design of the slitting section, Gallou says.

The PowerPoint presentation provides dozens of explanations, diagrams and mathematical formulae to show how any cutting activity which does not occur at the designed Spatial Nip-Point will yield ineffective results for the converter's slitting/rewinding customer.