Cross-head die with volumetric flow compensation means
US4171195A · kind A · utility
25Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1977 |
| Grant date | Oct 16, 1979 |
| Priority date | — |
| Expiry date | Nov 17, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2948/92647
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A cross-head die in which the manifold is provided with means for selectively varying the volume of the manifold at some locations relative to other locations, whereby the relative wall thickness about the annular configuration of the material flowing through the die is selectively adjusted about the periphery of the annular configuration of flowing material. Wall thickness and configuration are further controlled at the outlet orifice of the die by means movable to selectively expand, contract and alter the annular configuration of the die passage at the orifice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.