Internally illuminated retroreflective sign

Details Internally illuminated retroreflective sign Internally illuminated retroreflective sign

1988-03-18

1990-08-28

Arnold, Bruce Y.

Illumination

Supported by vehicle structure

Condition responsive

350105, 40564, 362 29, G02B 5122

Patent

active

049520237

ABSTRACT:
An internally illuminated sign employs retroreflective sheeting with optically transmissive bonds between cover layer and base layer, thereby making the sign suitable for applications where visibility of the sign is required if the internal illumination source fails. A light conduit may be employed to allow the source of internal illumination to be remote from the interior of the sign enclosure. Total internal reflection type sheeting also may be employed to diffuse the internal illumination.

REFERENCES:
patent: 3005382 (1961-10-01), Weber
patent: 3924929 (1975-12-01), Holmen et al.
patent: 4005538 (1977-02-01), Tung
patent: 4025159 (1977-05-01), McGrath
patent: 4208090 (1980-06-01), Heenan
patent: 4260220 (1981-04-01), Whitehead
patent: 4349598 (1982-09-01), White
patent: 4588258 (1986-05-01), Hoopman
patent: 4615579 (1986-10-01), Whitehead
patent: 4672089 (1987-06-01), Pricone et al.
patent: 4775219 (1988-10-01), Appeldorn et al.
"Transflectors Take Off at U.S. Airports," Reflexite Corporation Newsletter, Spring 1988.

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