Multi-layered molded articles
US4174413A · kind A · utility
70Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1977 |
| Grant date | Nov 13, 1979 |
| Priority date | — |
| Expiry date | Jul 18, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2495
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A multi-layered article molded according to the present invention has in its cross-section a triple-layered structure consisting of two surface layers and a core layer interposed between said surface layers, said triple-layered structure being injection molded in a single shot from two kinds of thermoplastic synthetic resins to be formed into the surface and core layers, respectively, said core layer having a thickness less than one half of the entire thickness of said article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.