Minnesota Mining and Manufacturing Company

Edward S Shinbach

Raymond Patrick Johnston

Lee A Pavelka

David M Burns

Thomas I Bradshaw

Article comprising an ultraviolet screening screen layer and a color layer containing a defined daylight fluorescent dye dissolved in a defined polymeric matrix. The article exhibits durable fluorescence and resistance to degradation from exposure to sunlight. If desired, the article is retroreflective.

Articles exhibiting durable fluorescence with an ultraviolet screening

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.

Growing community of inventors

Saint Paul, MN, United States of America

Edward S Shinbach