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US 7,744,228 B2Granted
Method of making retroreflective sheeting and articles
Assignee3M Innovative Properties Company
InventorKenneth L. Smith
Life of this patent
Estimating the term…
Abstract
The invention relates to a method of making retroreflective sheeting and other articles prepared from casting a moldable synthetic resin onto a tool having a microstructured surface.
Claims25
A retroreflective sheeting, comprising:
- channels, wherein at least some of the channels are discontinuous, and full cube microstructured elements having non-triangular reflective faces and an average height ranging from about 0.001 inches to 0.010 inches;
- wherein the sheeting is prepared as a roll-good comprising a pair of longitudinal peripheral edges and the channels are substantially parallel to the longitudinal peripheral edges of the roll of sheeting.
A retroreflective sheeting, comprising:
- structured channels alternated with and parallel to primary groove channels and full cube microstructured elements having non-triangular reflective faces and an average height ranging from about 0.001 inches to 0.010 inches;
- wherein the sheeting is prepared as a roll-good comprising a pair of longitudinal peripheral edges and the channels are substantially parallel to the longitudinal peripheral edges of the roll of sheeting.
A retroreflective sheeting, comprising:
- channels and full cube microstructured elements including angle errors having non-triangular reflective faces and an average height ranging from about 0.001 inches to 0.010 inches;
- wherein the sheeting is prepared as a roll-good comprising a pair of longitudinal peripheral edges and the channels are substantially parallel to the longitudinal peripheral edges of the roll of sheeting.
A retroreflective sheeting, comprising:
- channels and rows of full cube microstructured elements having non-triangular reflective faces and an average height ranging from about 0.001 inches to 0.010 inches;
- wherein the sheeting comprises at least one channel for each row of full cube microstructures, the sheeting is prepared as a roll-good comprising a pair of longitudinal peripheral edges and the channels are substantially parallel to the longitudinal peripheral edges of the roll of sheeting.
Dependencies are inferred from the claim text.