Microprismatic retroreflective mold, sheet, and article and methods of manufacture thereof
AssigneeAura Optical Systems, LP
InventorDrew J. Buoni
Life of this patent
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Abstract
An article, including a substrate having a surface with a groove pattern including microprisms thereon. The groove pattern includes a first set of first grooves intersecting with a second set of second grooves, the first grooves are parallel to each other along a same first direction across the groove pattern, and each of the first grooves include a plurality of repeating variable depth zones. Each of the variable depth zones include: a dive section having a first maximum depth, ZD2, and a rise section having a second maximum depth, ZR2. The second grooves are parallel to each other along a same second direction across the surface, the second direction being substantially perpendicular to the first direction.
Claims24
An article, comprising:
- a substrate having a surface with a groove pattern including microprisms thereon, wherein:
- the groove pattern includes a first set of first grooves intersecting with a second set of second grooves;
- the first grooves are parallel to each other along a same first direction across the groove pattern, and each of the first grooves include a plurality of repeating variable depth zones, each of the variable depth zones including:
- a dive section having a first maximum depth, ZD2,
- a rise section having a second maximum depth, ZR2;
- a transition section located between the dive section and the rise section, and the transition section includes a continuous surface transition with a maintenance of surface continuity between the dive section and the rise section and
- the second grooves are parallel to each other along a same second direction across the surface, the second direction being substantially perpendicular to the first direction.
Dependencies are inferred from the claim text.