Tamper-proof seals
US3974938A · kind A · utility
14Cited by
9References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1975 |
| Grant date | Aug 17, 1976 |
| Priority date | — |
| Expiry date | Nov 13, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61J1/14
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A seal in or for a blood bag has a first tamperproof seal consisting of a tube with an end wall separated by a line of weakening from an access passage. The line of weakening is torn open to gain access to the passage. The end wall is attached also by a flexible strap, and the action of tearing the line of weakening open renders available a plug also borne by the strap. Resealing by this plug is also tamper-proof in the sense that the plug cannot be removed without evidence that removal has been done or attempted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.