Valve plate and feedblock design for co-extrusion apparatus and co-extrusion process using same
US4483812A · kind A · utility
15Cited by
11References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1983 |
| Grant date | Nov 20, 1984 |
| Priority date | — |
| Expiry date | Apr 15, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/21
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is an apparatus and process for producing multiple-layer film or sheeting which includes an improved laydown means comprising adjustable cam-actuated control means for controlling the polymer flow and individual layer thickness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.