Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1997-07-02
1999-11-09
Loney, Donald
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
156209, 156245, 264 19, 264 25, 264220, 264241, 428172, B32B 328, B29L 3340
Patent
active
059810327
ABSTRACT:
Laminae suitable for use in a mold suitable for use in forming retroreflective sheeting and methods of making such laminae are disclosed. A representative lamina includes a single row of optically opposing cube corner elements disposed on its working surface. The working surface of a lamina is provided with a plurality of cube corner elements formed by the optical surfaces defined by three groove sets. Corresponding surfaces of opposing groove sets intersect substantially orthogonally along a reference edge to define first and second optical surfaces of the respective cube corner elements. The third optical surface of each respective cube corner element is defined by one surface of the third groove set.
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Benson Gerald M.
Smith Kenneth L.
3M Innovative Properties Company
Jensen Stephen C.
Loney Donald
Schwappach Karl G.
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