Triangular-pyramidal cube-corner retroreflective sheeting

G - Physics – 02 – B

Patent

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Details

G02B 5/124 (2006.01) E01F 9/00 (2006.01) G09F 13/16 (2006.01)

Patent

CA 2363723

To provide a triangular-pyramidal cube-corner retro--reflective sheeting having a novel structure characterized in that a lateral face (face c) using a base edge (x) of triangular-pyramidal reflective elements faced each other and arranged in the closest--packed state by sharing the base edge (x) on a first bottom plane (virtual plane X-)(') forms a triangle, two other faces (faces a and b) sharing one ridge line started from an apex (H) of the triangular-pyramidal reflective elements form a quadrangle, and the height (h') from the apex (H) up to the first bottom plane (virtual plane X-X') is substantially smaller than the height (h) from the apex (H) up to the substantially horizontal second bottom plane (Z-Z') including base edges (z and w) of the other lateral faces (faces a and b).

Cette invention se rapporte à une feuille rétroréfléchissante pour coin de cube en forme de pyramide triangulaire et ayant une nouvelle structure. Cette feuille se caractérise: en ce que les éléments réfléchissants en forme de pyramide triangulaire sont disposés en rangs serrés côte à côte; en ce que des éléments adjacents partagent des côtés de base (x) sur une première base (plan imaginaire X-X'); en ce que une face inclinée (face c), dont l'un des côtés est le côté de base (x), de chaque élément est triangulaire; en ce que les autres faces inclinées (face a, face b) partageant un côté s'étendant depuis le sommet (H) de l'élément sont rectangulaires; et en ce que la hauteur (h') allant de la première base (plan imaginaire X-X') au sommet (H) est sensiblement inférieure à la hauteur (h) allant d'une seconde base essentiellement horizontale (Z-Z') incluant les côtés de base (z, w) des autres faces inclinées (face a, face b) au sommet (H).

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