Machine and a method for folding nappy/diaper blanks
US8439814B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2008 |
| Grant date | May 14, 2013 |
| Priority date | — |
| Expiry date | Jan 14, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2403/942
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Blanks used in the manufacture of nappies/diapers are folded on a machine comprising a first aspirating roller (5) by which single blanks (2) are advanced in succession toward a second aspirating roller (6) rotating counter and substantially tangential to the first roller (5) at a folding station (T). The first roller (5) is equipped with movable restraining elements (8) designed to engage an intermediate part of each advancing blank (2), so that a leading half of the blank remains free to be taken up by a transfer mechanism (11) operating between the first and second rollers (5, 6) in an area upstream of the folding station (T), and transferred from the first roller (5) to the second roller (6); as the two rollers (5, 6) rotate, the trailing half of the blank (2) retained on the first roller (5) by the restraining elements (8) is drawn closer to the leading half, whereupon the two halves converge gradually until flattened one against the other on passing through the folding station (T), which coincides with the point of tangency between the two rollers (5, 6), and the fold in the blank (2) is complete. The transfer mechanism (11) swings pendulum fashion, moving in sympathy with th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.