Method and apparatus for extruding a plurality of ribbons
US4290989A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1979 |
| Grant date | Sep 22, 1981 |
| Priority date | — |
| Expiry date | Dec 10, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/345
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
There is disclosed an apparatus and method for simultaneously forming a flow of extruded material, especially dough, into a plurality of downwardly extending ribbons each at a substantially uniform flow rate and for controlling the tendency of such ribbons to curve as they emanate from the die. The apparatus is an extrusion device which includes a housing adapted for attachment at the exit of the extruder barrel and includes an inlet passage for directing the flow of extrudant downwardly and an outwardly flared section in fluid communication with and downstream of the inlet passage. A die plate is supported by the housing downstream of the inlet and across the flared section and includes a plurality of dies having orifices for forming the extrudant into a plurality of ribbons. A generally cone-shaped mandrel is supported within the flared section of the housing in spaced apart relationship from the die plate surface and the flared section wall defining an annular flow channel for the extrudant. The method of the present invention forms a substantially cylindrical flow of extrudant under pressure into a cone-shaped envelope and vents the flow to a low pressure area through a plurali…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.