Apparatus for internally cooling a plastic tubular film bubble
US4115048A · kind A · utility
32Cited by
6References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1976 |
| Grant date | Sep 19, 1978 |
| Priority date | — |
| Expiry date | Dec 27, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/0019
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for internally cooling extruded tubular film produced from film-forming polymers such as polyethylene, polypropylene and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.