Apparatus for making assemblies of pocketed springs
US4401501A · kind A · utility
45Cited by
9References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1982 |
| Grant date | Aug 30, 1983 |
| Priority date | — |
| Expiry date | Jan 29, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1751
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The subject apparatus assemblies strips of pocketed upholstery springs, one strip at a time, into spring cores for mattresses and the like. The connections of each such strip to its predecessor are made between the interpocket webs of the pocket sheeting of the two adjacent strips, preferably at intervals of two springs, and are staggered by one spring from strip to strip. The disclosed and preferred technique for joining the pocket material of the adjacent strips is thermal welding by ultrasonic vibration, but other specific forms of connection are also suggested.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.