Tamper proof label
US4184701A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1978 |
| Grant date | Jan 22, 1980 |
| Priority date | — |
| Expiry date | Feb 10, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/916
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention relates to tamper-proof labels useful for marking objects in a manner such that, if one were to attempt to transfer the label to another object, the label would be destroyed or defaced to such an extent that its transference would be noticeable. The label comprises a laminate comprising a transparent or translucent outer sheet having an information containing pattern printed on its inner surface, said printed film having a discontinuous coating of transparent plasticized organic polymeric material thereon, with said printed and coating surface having a coating of a color containing pressure sensitive adhesive film thereon. The plasticizer in said organic polymeric material being a non-reactive, migrating plasticizer, which is also a plasticizer for said pressure sensitive adhesive. Once applied to a substrate, if removal of the label is attempted, the label delaminates in a manner such that at least portions of the colored adhesive in register with the transparent discontinuous plasticized polymer coating remain on the substrate to which the label has been adhered resulting in a label which has a visually perceptible tamper-indicating change in at least portions of i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.