Multiple-layered sheeting apparatus and process therefor
US4443397A · kind A · utility
18Cited by
11References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1982 |
| Grant date | Apr 17, 1984 |
| Priority date | — |
| Expiry date | Aug 16, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2948/92961
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is an apparatus and process for the production of multiple-layer film or sheeting having desirable surface characteristics, especially including uniformity of layer thickness and width. The apparatus includes a feedblock which selectively splits the coextruded streams, controls the flow thereof and applies the layers in a manner such that the thickness of the various layers can be more easily and accurately controlled across the width of the sheeting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.