Retroreflective sign having improved legibility

Details Retroreflective sign having improved legibility Retroreflective sign having improved legibility

1989-11-17

1991-09-24

Dorner, Kenneth J.

Card, picture, or sign exhibiting

Illuminated sign

Reflective

40615, 350101, G09F 1316

Patent

active

050503278

ABSTRACT:
A sign having a face bearing an informational legand thereon, the face comprising at least one legend portion and at least one background portion, and the sign comprising at least one legend segment and at least one background segment, which segments are defined by the legend and background portions, wherein at least part of at least one of the legend and background segments is retroreflective and translucent. The segments of the signs which are translucent and retroreflective exhibit increased luminance under adverse lighting conditions, thereby increasing the conspicuity and legibility of the sign.

REFERENCES:
patent: 3790431 (1974-02-01), Tung
patent: 3802944 (1974-04-01), Tung
patent: 3934065 (1976-01-01), Tung
patent: 4215501 (1980-08-01), Meijer
patent: 4250646 (1981-02-01), Trachtenberg
patent: 4726134 (1988-02-01), Woltman
ASTM D 1003-61, pp. 17-24.

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