Method of making retroreflective sheeting and slot die apparatus
Assignee3M Innovative Properties Company
InventorsStanley Erickson, James Breister, Gregory Van Erem, David Meitz, Stephen Mohn, Paul DeRoussel
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 fluid synthetic resin onto a tool having a microstructured surface with a slot die apparatus. The invention further relates to a slot die apparatus.
Claims12
A slot die apparatus comprising a slot orifice between an upstream lip and downstream lip wherein the downstream lip comprises at least two surface portions having a different slope or curvature and the slope or curvature of at least one of the surface portions is independently adjustable.
Dependencies are inferred from the claim text.