Integral composite profile of cellular and non-cellular resins and a dual extrusion method for its manufacture
US4690862A · kind A · utility
23Cited by
24References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1984 |
| Grant date | Sep 1, 1987 |
| Priority date | — |
| Expiry date | Dec 28, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249992
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The dual extrusion and fusion of cellular and non-cellular resin extrudates produces an integral composite profile having a tongue and groove interlock. The resins are extruded through a common die having overlapping orifices. A bulbous tongue of one extrudate is encapsulated by finger-like projections of a second extrudate and the mated profiles are pulled through a vacuumized sizing box adapted to sealingly receive the cellular portion and to freely receive the non-cellular portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.