Security seals
US4537432A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1982 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Sep 27, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/50
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A one-piece plastics security seal, of the kind having a flexible strap securable within a passageway in a housing, may include a new locking arrangement and/or a new release arrangement. In the locking arrangement, the strap carries a series of teeth of non-rectangular outline, when viewed along the length of the strap, with at least a part of the passageway having an outline complementary to that of the strap and the teeth carried thereby, and the passageway being offset along its length in the region of a resiliently deformable stop for permitting movement of the teeth through the passageway in one direction, but not the other. In the release arrangement, the flexible strap and also a tab both extend generally transversely to the housing, with the strap being connected to the tab and the tab being frangibly connected to the housing. The locking arrangement is difficult to open, without causing visible damage, but is nevertheless easy to manufacture, and the release arrangement is easier to operate than if the strap had been frangibly connected directly to the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.