Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1999-06-29
2000-09-05
Loney, Donald
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
428172, 359530, 264270, 249 52, 2491871, B32B 328, G02B 5124
Patent
active
061140090
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 geometric structures disposed on the working surface. Each geometric structure includes three faces arranged as a cube corner element and at least one additional face. A set of parallel grooves is included, each groove having one of the three faces of one geometric structure and the at least one additional face of an adjacent geometric structure as groove side surfaces.
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3M Innovative Properties Company
Jensen Stephen C.
Loney Donald
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