Method and device for producing tear-off lids and tear-off lid
US11142369B2 · kind B2 · utility
0Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2019 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Jan 29, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2517/5056
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A tear-off lid with a curled edge of the removal opening is formed such that before the edge is curled, a plastics layer provided as a band of low thickness and preferably only 0.1 mm thickness is applied to the collar of the lid ring. In this way, a good seal of the cut edge of the tear-off lid is produced economically and with the possibility for production at a high rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.