Sheet assembly for forming imaged retroreflective sheeting

Claim 1

Sheet assembly useful to form graphically imaged retroreflective markings comprising a base retroreflective sheeting that retroreflects light shined against its front surface, a film overlying and visibly distinctive from the front surface of the base retroreflective sheeting, a layer of pressure-sensitive adhesive disposed between the film and base retroreflective sheeting, and a heat-susceptible low-adhesion layer interposed between the layer of pressure-sensitive adhesive and either the film or base retroreflective sheeting, the low adhesion layer having low adhesion to the pressure-sensitive adhesive layer prior to heat-exposure of the assembly such that the assembly may be manually peeled apart at the interface between the low-adhesion layer and pressure-sensitive adhesive layer, but developing in combination with the pressure-sensitive adhesive layer a firm and long-lasting bond between the film and base retroreflective sheeting when the assembly is heated to an elevated temperature.