Retro-reflecting sheet material

Details Retro-reflecting sheet material Retro-reflecting sheet material

G - Physics

02

B

88/113, 26/196,

G02B 5/12 (2006.01)

Patent

CA 1109308

RETRO-REFLECTING SHEET MATERIAL Abstract of the Disclosure The specification relates to retro-reflectors of the type used for road signs and markers and vehicle licence plates to make these objects more noticeable to road users after dark. In the invention, the surface of a metal substrate is made retro-reflective by applying a layer of an organic polymeric material and adhering glass beads thereto, and then passing the substrate through a roller mill or the like with the glass beads covered by a platen so that the beads form indentations in the metal surface. The presence of the platen allows the pressing (indentation) step to take place without damage to the glass beads or to the layer between the beads and the metal surface. By this means, a hard metal article can be made directly retro-reflective.

311780

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