Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1974-02-13
1976-01-27
Lesmes, George F.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
156231, 156232, 156245, 264 1, 264166, 264214, 264216, 428913, 350103, 350288, B29D 708, G02B 512
Patent
active
039353591
ABSTRACT:
Retroreflective sheeting is produced by bonding a multiplicity of cube corner formations to sheet material, and the cube corner formations are formed principally of a first resin formulation providing the body thereof and a second resin formulation providing the base thereof and the bonding to the sheet material. Cube corner formations are produced on a mold having a surface in which is formed an array of minute, contiguous cube corner recesses. The resin formulation initially deposited in the recesses is solidified substantially and the remaining depth of the recesses is filled with a bonding material which serves not only to level the cube corner formations, but also to bond them to the sheet material. The apparatus utilized is a continuously moving mold surface and has a plurality of stations for effecting the several steps of the process.
REFERENCES:
patent: 3684348 (1972-08-01), Rowland
patent: 3712706 (1973-01-01), Stamm
patent: 3741623 (1973-06-01), Mihalik
Lesmes George F.
Rowland Development Corporation
Silverman Stanley S.
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