Thermally welded spring pockets
US4234983A · kind A · utility
111Cited by
19References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1978 |
| Grant date | Nov 25, 1980 |
| Priority date | — |
| Expiry date | Oct 2, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C65/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Individually pocketed upholstery springs for assembly into so-called Marshall construction, in which the pockets containing the individual springs are formed between the overlaid plies of a two-ply strip of material by lines of separate individual welds which connect the plies together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.