Method of forming a fibrous web
US3975222A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 1974 |
| Grant date | Aug 17, 1976 |
| Priority date | — |
| Expiry date | Aug 1, 1994 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2013/5326
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of producing a disposable diaper and the diaper produced thereby are disclosed. The disposable multi-layer diaper includes at one side a porous fibrous facing layer to be brought into contact with an infant's skin, and includes at the other side a water impervious backing sheet, with a double contoured cross-sectional batt being interposed between the facing layer and backing sheet. The batt is smoothly contoured by increased fiber content along the transverse and longitudinal medians from the edges to the center of the batt. The batt is positioned in face-to-face engagement with the backing sheet. The batt and lateral extremities of the facing layer which extend beyond the batt are each adhered to the backing sheet. In a preferred embodiment of the invention, a paper-like, densified, highly compacted cellulosic layer is formed integrally with the batt and is positioned in face-to-face engagement with the backing sheet. The method provides a transverse peak in an air-laid web by simultaneously feeding to an individualizing station two continuous strips of compacted fibers, one strip being narrower than the other and lying along the longitudinal median of the other, the ind…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.