Lamina comprising cube corner elements and retroreflective sheeting
First Claim
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1. A lamina comprising cube corner elements having faces formed from grooves wherein adjacent grooves range from being nominally parallel to nonparallel by less than 1°
- , have included angles that differ by at least 2°
, and the included angles of the grooves are arranged in a repeating pattern.
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Abstract
The present invention is directed to lamina(e) comprising cube corner elements, a tool comprising an assembly of laminae and replicas thereof. The invention further relates to retroreflective sheeting.
51 Citations
51 Claims
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1. A lamina comprising cube corner elements having faces formed from grooves wherein adjacent grooves range from being nominally parallel to nonparallel by less than 1°
- , have included angles that differ by at least 2°
, and the included angles of the grooves are arranged in a repeating pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 16, 17, 18, 19)
- , have included angles that differ by at least 2°
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11. A lamina comprising cube corner elements having faces formed from grooves wherein the faces intersect at a common peak height, adjacent grooves range from being nominally parallel to nonparallel by less than 1°
- and the included angles of adjacent grooves differ by at least 2°
. - View Dependent Claims (12, 20, 21)
- and the included angles of adjacent grooves differ by at least 2°
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13. A lamina comprising cube corner elements having faces formed from grooves wherein adjacent grooves range from being nominally parallel to nonparallel by less than 1°
- , have included angles that differ by at least 2° and
have bisector planes that range from being mutually nominally parallel to nonparallel by less than 1°
. - View Dependent Claims (14, 22, 23, 24)
- , have included angles that differ by at least 2° and
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15. A lamina comprising preferred geometry cube corner elements wherein at least a portion of the cube corner elements are canted having an alignment angle selected from alignment angles between 45°
- and 135°
, alignment angles between 225° and
315°
, and combinations thereof. - View Dependent Claims (25, 26, 27)
- and 135°
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28. Retroreflective sheeting comprising a row of preferred geometry cube corner microstructures having faces defined by grooves wherein adjacent grooves in the row range from being nominally parallel to nonparallel by less than 1°
- , have included angles that differ by at least 2°
, and the included angles of the side grooves are arranged in a repeating pattern. - View Dependent Claims (29, 30, 31)
- , have included angles that differ by at least 2°
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32. Retroreflective sheeting comprising a row of cube corner elements having faces defined by grooves wherein the faces intersect at a common peak height, adjacent grooves in the row range from being nominally parallel to nonparallel by less than 1°
- and the included angles of adjacent side grooves differ by at least 2°
. - View Dependent Claims (33, 34)
- and the included angles of adjacent side grooves differ by at least 2°
-
35. Retroreflective sheeting comprising a row of cube corner elements having faces defined by grooves wherein adjacent grooves in the row range from being nominally parallel to nonparallel by less than 1°
- , have included angles that differ by at least 2° and
have bisector planes that range from being mutually nominally parallel to nonparallel by less than 1°
. - View Dependent Claims (36, 37)
- , have included angles that differ by at least 2° and
-
38. Retroreflective sheeting comprising a row of preferred geometry cube corner microstructures wherein a first cube corner element is canted having an alignment angle between 45°
- and 135° and
a second adjacent cube is canted having an alignment angles between 225° and
315°
. - View Dependent Claims (39, 40, 41, 42, 43)
- and 135° and
- 44. Retroreflective sheeting comprising an array of preferred geometry cube corner elements that exhibit a uniformity index of at least 1 at an entrance angle of at least 30°
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51. Retroreflective sheeting comprising a pair of adjacent rows of preferred geometry cube corner elements wherein adjacent elements in a row have at least one dihedral edge that ranges from being nominally parallel to nonparallel by less than 1°
- and wherein the pair of rows comprise at least two types of matched pairs.
Specification