Method and apparatus for forming spring units
US6622384B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2000 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Jun 6, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49613
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for forming spring units for use in a mattress, bed, divan bed, or other upholstered unit, the method including the step of inserting a second spring (12A) into a first spring immediately prior to said first spring being formed into a pocketted spring. The second spring (12A) may be formed into a pocketted spring prior to insertion into said first spring.The apparatus includes means (4) for feeding a second spring (12A) to a composite spring forming station (6) immediately prior to a first spring being fed to said station, means to compress and rotate the formed composite spring (30) through substantially 90°, means to insert the composite spring into a sleeve of material, and means to form said composite spring and a portion of said sleeve into a pocketted spring unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.