Retroreflective sheeting with retroreflective markings

Details Retroreflective sheeting with retroreflective markings Retroreflective sheeting with retroreflective markings

1976-11-26

1978-04-04

Corbin, John K.

40615, 350 97, 350103, 350106, G02B 5128

Patent

active

040824268

ABSTRACT:
Retroreflective sheeting is taught which incorporates markings that are distinctly visible when the sheeting is viewed at an angle under retroreflective viewing conditions, thereby allowing a viewer to determine the identity of the sheeting. The sheeting comprises a monolayer of microsphere-lenses; a spacing layer coated on the microsphere-lenses and contoured so as to generally follow the curved back surfaces of the microsphere-lenses; a specularly reflective layer coated over the spacing layer; and a transparent image layer disposed in an imagewise pattern between the spacing layer and specularly reflective layer, with the thickness of the image layer being greater in the valleys of the spacing layer between the microsphere-lenses than on the curved surfaces directly in back of the microsphere-lenses.

REFERENCES:
patent: 3154872 (1964-11-01), Nordgren
patent: 3795435 (1974-03-01), Schwab
patent: 3801183 (1974-04-01), Sevelin et al.
patent: 3994086 (1976-11-01), Mizuochi

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