Device for forming multilayer sheets and extrusion die therefor
US6461138B2 · kind B2 · utility
3Cited by
10References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2001 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Jan 24, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/07
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Broad parts are formed on at least one passage including a passage for forming the thinnest layer among passages for respective resin layers of a multilayer sheet at an upstream side of a confluence. In the broad parts, clearances become larger to both ends of the passage along the width thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.