Closure-opening device
US4467938A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 25, 1983 |
| Grant date | Aug 28, 1984 |
| Priority date | — |
| Expiry date | Aug 25, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D17/4011
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A closure-opening device for a 360.degree. peripherally-scored lid closure member including an "arrow-tab" element having a base portion, middle portion and a head portion. A tab-score extends around the "arrow-tab" element and terminates at opposite ends of the tab score at opposite locations adjacent to an underside of the base portion. The head portion has a sharp included-angle point of approximately 60.degree. angle and the base portion has a relatively blunt included-angle point of approximately 120.degree. angle. Reinforcement droplet portions are located in a spaced pair at opposite ends of the tab score. Fingernail engagement projections extend laterally outward from the sharp angle head portion of the tab element. The middle portion has finger-graspable arcuate-shaped recesses on opposite side walls thereof. The "arrow-tab" element projects upwardly and a stress concentrated for initial rupture of the tab score is provided at the sharp included-angle point while the reinforcement droplet portions preclude any complete separation of the tab element from ever occurring as to the lid closure member. A further raised-surface, upwardly-extending arrow-shaped tab element is pro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.