Disposable diaper
US7153295B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2003 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Apr 29, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F13/513
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A disposable diaper includes a top sheet, a back sheet, and a liquid absorbent core disposed therebetween. The diaper has openings, which pass through the top sheet and the core, and are formed in at least the crotch region of the diaper. The back sheet has a free portion which is disposed beneath the core and extendible downwards in its thickness direction. The back sheet further has a fixed edge portion which is outside an outer periphery of the free portion and fixed to the top sheet. A plurality of longitudinally extending contractible elastic members are disposed at least in the free portion and the fixed edge portion. A plurality of transversely extending gathers are formed under the contraction of the elastic members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.