Method and apparatus for producing seamless retroreflective sheeting
US5643400A · kind A · utility
21Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1996 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | Jul 9, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1737
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for forming "seamless" retroreflective sheeting is described. At least two mold surfaces are used, each having alternate areas of arrays of prism recesses and spaces. In a first step, prisms are formed in one of the mold surfaces and applied to a base film or web. Next, prisms are formed on the second mold surface and applied to the spaced areas left in the first step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.