Method and apparatus for producing discretely striped multi-property foam
US6767932B2 · kind B2 · utility
1Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2001 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Jul 16, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C70/747
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to methods and apparatus for producing a discretely striped, multi-property foam and the products and articles produced thereby. The invention provides a pre-foam stream at a first pressure and intermittently injects at least one additive into the pre-foam stream at a pressure higher than the first pressure, providing a laminar flow pre-foam stream with alternating segments having different properties. The pre-foam stream is poured onto a surface and cures into a discretely striped foam product which may be used for many purposes such as but not limited to padding, clothing, toys, or bedding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.