Method for forming multilayer sheets and extrusion die therefor
US6203742A · kind A · utility
8Cited by
9References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1998 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Aug 21, 2018 |
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.