Apparatus and method for cooling an extruded blown film
US5213725A · kind A · utility
5Cited by
28References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1992 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Mar 10, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/885
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus and method for cooling an extruded blown film in which the interior surface of the thin film bubble is contacted with a gas which does not contain water vapor to thereby cool the extruded film. The apparatus and method may employ an enclosed circulation system to provide for the reuse of the gas through cooling with a liquid coolant such as liquid cryogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.