Apparatus for forming tall tapered containers
US4782685A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1987 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Dec 7, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D22/26
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of forming a tapered container in which the container is first redrawn to a partial length having first and second straight sidewall portions interconnected by a transition position and then redrawn to substantially its final length and tapered condition by drawing material from the transition portion. The method also optionally includes an overlength second redraw and a bottom profiling step utilizing the overdrawn portion to form the profile. The apparatus includes a plurality of stations wherein the redrawing is accomplished in the first instance with a tapered punch and straight walled die and in the second instance with a tapered punch and tapered die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.