Triangular-pyramidal cube-corner retroreflective article having curved reflective lateral face
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United States of America Patent
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Mar 2, 2010
Grant Date -
May 17, 2007
app pub date -
Dec 2, 2004
filing date -
Dec 2, 2003
priority date (Note) -
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Abstract
To provide a retroreflective article formed of many triangular-pyramidal cube-corner retroreflective element pairs. One-side groove angle formed between a cross line between a plane vertical to the common plane and to a V-groove vertical plane which includes the base line of a V-shaped groove is vertical to the common plane, and a reflective lateral face containing the base line of the V-shaped groove, and the V-groove vertical plane, does not form a constant angle in the reflective lateral face but the lateral face forms a curved and/or multiple surface. A base line constituting any directional V-shaped groove in retroreflective element pairs is a nonlinear base line which does not form a linear trajectory and the reflective lateral face formed of the V-shaped groove forms a curved and/or multiple surface.
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