Encapsulation of pre-expanded elastomeric foam with a thermoplastic
US6099948A · kind A · utility
90Cited by
12References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 1, 1998 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | May 1, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249953
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A capsule is formed from a pre-expanded foam core in a compressed condition with a thermoplastic outer covering completely enveloping the foam core to maintain it in the compressed condition. The outer covering is made of a material capable of softening sufficiently when heated to permit the foam core to expand toward its original expanded uncompressed condition. Preferably, the outer covering adheres to the foam and then is carried by the expanding foam into intimate contact with the inner surface of a hollow structural member so as to form a seal for the hollow structural member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.