Method and apparatus for necking a metal container and resultant container
US5778723A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 18, 1996 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Sep 18, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D7/04
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method for necking an end of a metal container include effecting initial deformation, generally radially inwardly, of an axial portion to establish a necked-in generally convex transition portion and an adjacent portion disposed between the transition portion and the container end which is initially generally cylindrical. Both portions are of reduced diameter with respect to the original can body diameter. Sequentially, through the series of formation steps, the portion to be necked-in is further reduced in diameter to produce an outwardly generally convex portion disposed in underlying relationship with respect to an outwardly concave portion. A generally, radially, outwardly directed flange may be established within the end section of the necked-in portion. Apparatus to perform the foregoing forming steps consists of a plurality of die means which are subjected to relative axial movement and contact and reshape the exterior of the container portion that is to be necked-in. An additional embodiment has a necked-in portion having a plurality of alternating convex and concave portions. A further embodiment has a straight angularly, inwardly oriented portion connected to the body b…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.