METHOD OF MAKING RETROREFLECTIVE MATERIAL

• US 3,810,804 A
• Filed: 02/25/1972
• Issued: 05/14/1974
• Est. Priority Date: 09/29/1970
• Status: Expired due to Term

• Current Assignee: Rowland W
• Original Assignee: Rowland W
• Inventors: ROWLAND W
• Application Number:
  US05/229,378
• Time in Patent Office: 809 Days
• US Class Current: 156/245
• CPC Class Codes: B29D 11/00605 Production of reflex reflectors
• CPC Class Codes: B44F 1/04 after passage through surface layers, e.g. pictures with mirrors on the back
• CPC Class Codes: G02B 5/124 plural reflecting elements forming part of a unitary plate or sheet

Abstract

A COMPOSITE RETROEFLECTIVE MATERIAL IS PREPARED BY DEPOSITING ON A MOLDING SURFACE HAVING CUBE CORNER RECESSES A FLUID MOLDING MATERIAL IN AN AMOUNT SUFFICIENT TO FILL THOSE RECESSES. A PREFORMED BODY MEMBER IS APPLIED THERETO AND THE MOLDING MATERIAL IS HARDENED AND BONDED TO THE BODY MEMBER. AS A RESULT, RETROEFLECTIVE MATERIAL IS PROVIDED WITH A BODY PORTION HAVING ONE SMOOTH SURFACE AND ANOTHER SURFACE FROM WHICH PROJECT A MULTIPLICITY OF SEPARATELY FORMED, MINUTE CUBE CORNER FORMATIONS HAVING SIDE EDGE DIMENSION OF LESS THAN 0.025 INCH. THE CUBE CORNER FORMATIONS MAY THEN HAVE APPLIED THERETO A RETROREFLECTIVE COATING, AND AN ADHESIVE LAYER AND RELEASE PAPER MAY BE SUPERPOSED THEREON TO PERMIT FACILE MOUNTING ON A SUPPORT SURFACE.

Claims