Apparatus for producing polyurethane foam
US4988271A · kind A · utility
11Cited by
11References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1987 |
| Grant date | Jan 29, 1991 |
| Priority date | — |
| Expiry date | Jul 7, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2075/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of producing polyurethane foam slab by allowing a urethane foam stock solution in a tank to expand in a reduced pressure. The flatness of the top of the polyurethane foam is secured by providing a lifting jig or a plate within the tank, or by rotating the tank. An apparatus for carrying out the method is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.