Tiled retroreflector with multi-stage dicing
US11312092B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2019 |
| Grant date | Apr 26, 2022 |
| Priority date | — |
| Expiry date | Oct 11, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/124
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Methods of making tiled articles and molds used to make retroreflective articles. The methods include forming a prism array on a master substrate and forming a replica of the master. A reference edge is formed on the replica, thereby reducing the size of the prism array, yet maintaining a lateral dimension of the replica to maintain ease of handling of the replica. The replica is copied and the reference edge on the copied tiles are exposed, such that the reference edge can be mated and secured face-to-face with a reference edge on other tiles in order to form a tiled article. The tiled article is used as a mold to produce retroreflective articles or can be further duplicated and mated to form larger tiled articles to be used as molds. Tiled articles used as molds and retroreflective articles produced from the molds are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.