Method of making a foam plastic cushion having a peripheral frame and an exterior cover
US4116736A · kind A · utility
45Cited by
9References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1976 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Oct 1, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C51/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus are disclosed for preshaping a sheet material, more particularly a textile and/or a plastic sheet, under differential pressure in a molding die, whereby to form a sack-like structure which becomes integrally incorporated as the cover of a foamed plastic cushion, vehicle seat, protective padding element or similar article, by the introduction of a self-foaming elastomeric material into the sack while it is being held in the molding die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.