Industrial use for the "nip-inducted effect" to separate sheets

Abstract

This paper introduces an analytical method for the explanation of the nip inducted effect. This effect is known for a long term as a disturbance effect in the web handling industry. Here it is used for breaking bindings between the surface of sheets. The nip inducted effect causes a displacement of layers due to rolling a cylinder over a stack of sheets, known in the winding process of paper coils.The developed model is based on the assumption that the kinematic processes of the nip inducted effect are explainable with a gear of hollow cylinders. It is shown how the geometry of a hollow cylinder is attuned. The geometry and the translation of the gear will be influenced by the material parameters of the promoted paper.The analytical model will be discussed with the results of Pfeiffer and sorted in the existing knowledge about the nip inducted effect.The model is explained on the example of a developed machine for breaking bindings between the surfaces of paper sheets.Another focus is set on the measurement of the reversible extension of paper. These measurements are important for the industrial use of the nip inducted effect

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