Hot melt ink transparency
US4877676A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1988 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | Sep 20, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31801
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In the particular embodiments of the invention described in the specification, a transparency includes a transparent substrate made of a polyester material, an ink pattern disposed on one surface of the transparent sheet in the form of three-dimensional ink spots having curved surfaces and a transparent layer convering the ink spots which has an index of refraction approximately the same as that of the ink spots. The transparent layer is applied to the substrate and the ink spots in the form of a liquid coating which wets the surfaces of the substrate and ink spots and spreads over them to produce a transparent layer having a maximum deviation of about 20 degrees from a plane parallel to the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.