Pull tab with raised lift end and associated method
US12246371B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2024 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Sep 9, 2044 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D51/383
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A progressive die manufacturing method for producing pull tabs with raised lift ends for beverage containers utilizes an ear carry process, producing tab blanks from a carrier sheet fixed by carrier strips at attachment points. At a tab station, blanks are formed into pull tabs with specific features including a nose, rivet receiving portion, lift portion, and preferably a finger hole. A lift station creates deformations elevating the lift portion relative to a highest continuous surface of the pull tab, prior to any deformations or bends. The carrier strips are then cut to release the finished pull tabs. Optional enhancements include an integrated or modular lift station, specific bending angles and distances, and a center bar for indicia application. This method combines the benefits of the ear carry process with improved ergonomics, enhancing user experience while minimizing machinery modifications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.