Method for producing retroreflective material
Abstract
Abstract RETROREFLECTIVE SHEETING IS PRODUCED ON A CONTINUOUS BASIS BY APPLYING TRANSPARENT SHEET MATERIAL OVER A HARDENABLE MOLDING MATERIAL PREVIOUSLY DEPOSITED UPON A MOVING MOLD SURFACE, AFTER WHICH THE MOLDING MATERIAL IS SOLIFIFIED AND BONDED TO THE SHEET MATERIAL TO PRODUCE A COMPOSITE STRUCTURE. THE MOLD SURFACE HAS AN ARRAY OF MINUTE. CONTIGUOUS CUBE-CORNER RECESSES THEREIN, SO THAT THE SHEETING CORRESPONDINGLY HAS A MULTIPLICITY OF CLOSELY SPACED CUBE-CORNER FORMATIONS SPACED ABOUT AND PROJECTING FROM A SMOOTH SURFACE OF THE SHEET MATERIAL, WHICH PROVIDES THE BODY PORTION THEREOF. THE APPARATUS MOST CONVENIENTLY USED IS A DRUM MOUNTED FOR ROTATION AND HAVING A MOLD SURFACE PROVIDING AN ARRAY OF CUBE-CORNER RECESSES DISPOSED ABOUT ITS CIRCUMFERENCE. A SUITABLE MEMBER DESIRABLY COOPERATES WITH THE MOLD SURFACE FOR APPLICATION OF THE SHEET MATERIAL AND UNIFORM DISTRIBUTION OF THE MOLDING MATERIAL THEROVER.
Inventors
- 👤 William P Rowland
Bibliographic Details
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