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US 6,884,371 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.
Claims16
A method of making retroreflective sheeting comprising:
- providing a tool comprising a PG cube corner microstructured surface with at least one channel;
- advancing the tool in a direction such that the channel is substantially parallel to the direction of the advancing tool;
- casting a moldable resin onto said tool surface;
- solidifying the resin forming a retroreflective sheet having a surface comprising cube corner elements;
- and
- removing the sheet from the tool.
3 more elements
A method of making retroreflective sheeting comprising:
- providing a tool comprising a cube corner microstructured surface with channels selected from primary groove channels, structured channels, cube cavity channels, and combinations thereof;
- advancing the tool in a direction such that the channel is substantially parallel to the direction of the advancing tool;
- casting a moldable resin onto said tool surface;
- solidifying the resin farming a retroreflective sheet having a surface comprising cube corner elements;
- and
- removing the sheet from the tool.
3 more elements
Dependencies are inferred from the claim text.