Reshaping of containers
US5829290A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 1997 |
| Grant date | Nov 3, 1998 |
| Priority date | — |
| Expiry date | Sep 4, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D51/2646
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for the reshaping of containers is described. A mold having at least three parts is used to hold the container blank. Pressurized air supplied to the cavity of the container causes it to expand to take on the shape of the mold chamber. Whilst this operation is taking place, the mold parts move towards each other under the action of pistons which load both ends of the mold and container, thus preventing longitudinal tension in the container wall. The mold parts are initially spaced from each other by gaps or split lines which are reduced by the movement of the mold parts towards each other but are never completely closed up.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.