Specular-appearing reflex reflectors

Claim 1

A REFLECTIVE SHEET MATERIAL ON THE FRONT FACE OF WHICH SPECULAR REFLECTION OF LIGHT PREDOMINATES BY NORMAL DAY VIEWING AND REFLEX-REFLECTION OF LIGHT IS PROVIDED FOR NIGHT VIEWING, COMPRISING (1) A FLEXIBLE TRANSPARENT LAYER, (2) A SMOOTH-SURFACED, VISIBLY-CONTINUOUS METALLIC FILM PRESENTING A SPECULAR REFLECTING SURFACE FACING SAID TRANSPARENT LAYER AND VISIBLE THROUGH SAID TRANSPARENT LAYER FROM THE FRONT FACE OF SAID SHEET MATERIAL, AND (3) A DISCONTINUOUS PATTERN OF REFLEX-REFLECTING AREAS CONSISTING OF REFLEX-REFLECTING ELEMENTS FIRMLY AFFIXED A BINDER ON THE FRONT FACE OF SAID TRANSPARENT LAYER, THE REFLEX-REFLECTING AREAS OF SAID DISCONTINUOUS PATTERN COVERING BETWEEN ABOUT 10 AND 30% OF THE TOTAL AREA OF THE FRONT FACE OF SAID SHEET MATERIAL, SAID SHEET MATERIAL EXHIBITING A REFLEX-REFLECTING RETURN OF LIGHT FOR EVERY 36 SQUARE INCHES OF AREA OF AT LEAST 5 CANDLE POWDER PER FOOT CANDLE OF INCIDENT LIGHT AS MEASURED AT AN ANGLE OF ONE-THIRD DEGREE FROM THE INCIDENT BEAM UNDER NIGHTTIME CONDITIONS, SAID REFLEX-REFLECTING ELEMENTS CONSISTING ESSENTIALLY OF TRANSPARENT GLASS BEAD MICROSPHERES HAVING MINUTE SPECULARLY-REFLECTING HEMISPHERICAL CAPS UNDERLYING THE BACK EXTREMITY THEREOF AND HAVING A REFRACTIVE INDEX OF ABOUT 1.9.