Method of changing die head for converting a co-extrusion apparatus
US4783290A · kind A · utility
6Cited by
16References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 18, 1986 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Feb 18, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA21C11/163
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a method of operating a co-extruder, a co-extrusion die used during a co-extrusion mode of operation is replaced by a simple extrusion die which is used during a simple extrusion mode of operation. The co-extruder has a pair of juxtaposed outlets one of which is blocked by the simple extrusion die during utilization thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.