Measures to control opening of full-panel safety-edge, convenience-feature end closures
US4804106A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1988 |
| Grant date | Feb 14, 1989 |
| Priority date | — |
| Expiry date | Jan 22, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2517/0079
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A full-open, disc-removal, convenience-feature end wall closure with raw edge metal protection and improved easy-open features includes a peripherally-located scoreline defining the disc to be removed, a back scoreline located within the disc and a longitudinally rigid (non-lanced) opener made integral with the disc by a rivet. A multi-layer fold of sheet metal contiguous to the peripheral scoreline shields residual scoreline metal which remains with the disc. The back scoreline includes a central vent portion and a pair of legs extending, one each from such central portion, on opposite sides of the rivet, toward the adjacent portion of the peripheral scoreline so that, after rupture of the vent portion of the back scoreline, rupture of the back scoreline legs tends to move the opener in a radial direction; radially-directed movement is controlled and the working end of the opener is turned inwardly, in relation to a container, and toward a prescribed location with respect to the peripheral scoreline so as to facilitate initial rupture. The remainder of the peripheral scoreline is severed by continuing arcuate movement of the handle end of the opener which places the handle end rad…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.