Retroreflective traffic sign and process and apparatus for manufacturing same
US10838118B2 · kind B2 · utility
2Cited by
10References
19Claims
0Family size
Inventor
Key dates
| Filing date | Jun 12, 2018 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Jun 12, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2307/732
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method, apparatus for making, and a retroreflective traffic sign consists of a polymeric film having a front face and a rear face, wherein the rear face has a pattern of microprismatic retroreflective elements integrally formed as part of said film; a pattern of cell walls formed of an adhesive-containing polymer defining cells in which the microprismatic retroreflective elements are in the cells; and a substrate is adhered directly to the cell walls formed of the adhesive-containing polymer while leaving an air gap between the microprismatic retroreflective elements and the substrate in the cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.