Method and an apparatus for producing web-shaped plastic foil
US5911929A · kind A · utility
1Cited by
3References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1997 |
| Grant date | Jun 15, 1999 |
| Priority date | — |
| Expiry date | Mar 5, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2007/008
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and an apparatus for producing web-shaped plastic foil (19) is described, in which granulate or pulverulent polymer and particulate finer are intermingled, whereafter the mixture is extruded through a die aperture (18) for forming the finished plastic foil. In order to facilitate the intermingling of the above-disclosed starting materials, the granulate or pulverulent polymer is plasticized and de-aired prior to the admixture of the particulate filler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.