Method of making strings of pocketed springs
US9764939B2 · kind B2 · utility
2Cited by
18References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2015 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Dec 26, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49613
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus for ventilating a web of material used in the manufacture of pocketed springs may be removably attached to a pocket coiler. The apparatus has an upper movable portion which pivots relative to a stationary portion. The stationary portion may be removably attached to the pocket coiler. Each portion has at least one roller, a web of material passing between the rollers during use. One of the rollers may have protrusions to create openings in the material before the material enters the pocket coiler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.