Method and apparatus for determining at least one sheet...

B - Operations – Transporting – 65 – H

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B65H 23/04 (2006.01) G01B 5/30 (2006.01)

Patent

CA 2200228

There are provided a method and an apparatus for determining at least one sheet stretch value of a roll of material (2). The method comprises the steps of (a) radially marking one side end of the roll (2) from periphery thereof to produce a series of aligned marks (4) along a radius thereof; (b) supporting the roll (2) in such a manner that it is free to rotate, thus allowing relaxation of peripheral layers thereof; and (c) after steps (a) and (b), measuring a lateral shifting value GAP of one of the marks (10), which is the outermost in periphery of the roll (2), with respect to an adjacent mark (16).

La présente invention concerne un procédé et un dispositif d'évaluation de l'une au moins des valeurs caractéristiques de feuille dépliée d'une matière enroulée (2). Le procédé consiste à: (a) apposer une marque radiale sur l'un des flancs d'extrémité du rouleau (2) en partant de la surface externe pour produire une suite de marques alignées (4) le long de son rayon; (b) à soutenir le rouleau (2) de façon qu'il puisse tourner librement, permettant ainsi aux spires extérieures de se dérouler; et (c) après les opérations (a) et (b), à mesurer la différence de valeur de la translation latérale de l'une des marques (10) située le plus vers la surface externe du rouleau, par rapport à une marque adjacente (16).

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