One-piece plastic snap-hinge closure
US5115931A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1991 |
| Grant date | May 26, 1992 |
| Priority date | — |
| Expiry date | Jun 5, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D47/0814
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The closure consists of a lower part (1) and a cap (2), which are connected to each other by at least one film hinge (3). Spring elements (4) integrally formed from the jacket walls of the two closure parts are disposed on both sides of the film hinge (3). The thickness of the spring elements (4) varies between the shoulder points (5) of the spring elements. In the area of the shoulder points the thickness is approximately the same as the wall thickness of the jacket walls, and in the center, that is, in the area extending over the plane of separation, it is considerably less. The variation of the wall thickness permits a customer-specific adaptation of the snap action of the closure without having to make it in a completely new way every time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.