Injection molding process for forming a retroreflector
US7682533B2 · kind B2 · utility
9Cited by
10References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 11, 2005 |
| Grant date | Mar 23, 2010 |
| Priority date | — |
| Expiry date | Oct 24, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2011/0091
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection process for forming a retroreflector on a matrix mold having a plurality of prisms that each define a cavity. The process includes the steps of a) injecting a first layer of plastic on the matrix mold for partially filling up each prism up to a predetermined uniform thickness so as to define a recessed portion corresponding with each cavity of the prisms; and b) injecting a second layer of plastic onto of the first layer, the second layer filling up the recessed portion defined in each cavity of the prisms so that second layer defines a flat portion on an exterior side of the second layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.