发明名称 |
CUBE CORNER ARTICLES EXHIBITING IMPROVED ENTRANCE ANGULARITY IN ONE OR MORE PLANES |
摘要 |
<p>The invention provides a thin, flexible retroreflective sheeting formed from a substantially optically transparent material. The sheeting comprises a substrate having a base surface disposed in a base plane; a structured surface opposite the base surface that contains at least one array of canted cube corner element matched pairs formed by three intersecting sets of substantially parallel grooves including a primary groove set, and two sets of secondary grooves, each matched pair including a first canted cube corner element and a second canted cube corner element disposed opposite a primary groove from the first element, wherein (a) opposing cube corner elements in a given array have their symmetry axes canted in a first plane and through a predetermined cant angle measuring between 4 DEG and 15 DEG from an axis extending normally from the base; (b) the sheeting of this given array exhibits its broadest range of entrance angularity in a second plane angularly displaced from the first plane, and in a third plane, angularly displaced from the first plane; and substantially each of the cube corner element arrays is oriented such that either the second or third plane is approximately parallel with an edge of the sheeting. <IMAGE></p> |
申请公布号 |
EP0830621(B1) |
申请公布日期 |
2001.11.14 |
申请号 |
EP19960917240 |
申请日期 |
1996.06.06 |
申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
SMITH, KENNETH, L.;BENSON, GERALD, M. |
分类号 |
G09F13/16;G02B5/124;(IPC1-7):G02B5/124 |
主分类号 |
G09F13/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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