Apparatus for the production of foamed polyolefin sheets
US5281119A · kind A · utility
1Cited by
16References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1992 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Oct 7, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2023/001
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for the formation of a foamed polyolefin sheet provided with a cylindrical cooling device for cooling a foamed extruded tubular body at one end of an extruder, air outlets for increasing the internal pressure of the cooled foamed tubular body at a region between the extruder die and the upstream section of a cylindrical cooling device and between at least two adjacent sections of a cylindrical cooling device and a cutting blade for slitting the foamed tubular body enables the production of foamed polyolefin sheets with improved surface characteristics and strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.