Gel-interleaved tamper-evident wrap
US5104704A · kind A · utility
25Cited by
12References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1990 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Oct 9, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31685
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A tamper evident over-wrap is disclosed which employs a multi-layered system including three overlapping layers of containment material and two interleaved layers of reactive material, at least one of which is a gel. Upon formation of an opening of the middle layer of containment material, the previously-isolated layers of reactive material will intermingle and react. These materials react to form a color change. By using a gel, manifestations of tampering attempts are considerably enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.