Tamper- or damage-indicating members
US5524294A · kind A · utility
Inventors
Key dates
| Filing date | Jun 28, 1993 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Jun 28, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/231
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A apparatus for providing a tamper- or damage-indicating member, such as a tamper-evident glove. The apparatus comprises first and second layers, typically inner and outer glove-shaped bodies, of substantially liquid- and air-impermeable material, at least a portion of the second layer being of translucent material and having a contrasting color relative to the first layer. The apparatus further comprises means for sealing at least the portion of the second layer to the first layer, such that the portion surrounds a zone of the surface of the first layer, forming a space between the layers which is adjacent the zone and is substantially free of air. When the second layer is sealed to the first layer, breach in either layer adjacent the zone results in a change in perceived color in the area of breach.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.