Container intended for contents under pressure together with a method for the manufacture of such a container
US4364220A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1980 |
| Grant date | Dec 21, 1982 |
| Priority date | — |
| Expiry date | Sep 8, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D75/48
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The invention relates to a sheet metal container adapted so that it can withstand an internal pressure. The container comprises two combined shell-shaped cavities, compression-moulded from the same web which cavities are brought together as the web is doubled along pre-impressed folding lines in two steps, namely a first step wherein the longitudinal edges of the web are joined together to form a tube of an elongated, substantially triangular cross-section, and a second step when the tube formed, after the contents have been introduced, is pressed flat and is sealed around the shell-shaped cavities. Finally the web is cut or punched around the hollow bodies formed by the shell-shaped portions to form a flange, closed in itself, which flange is folded down or beaded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.