Apparatus and methods for securing elastic to a carrier web
US11690767B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2020 |
| Grant date | Jul 4, 2023 |
| Priority date | — |
| Expiry date | Sep 23, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/4878
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus and methods are provided to allow for creation of an elastic laminate. Non-stretched elastic can be laid at peaks over a nonwoven layer contained in valleys and atop peaks. Stretched elastic can be laid over tented nonwoven to create nonwoven tunnels when a second nonwoven is laid atop the first nonwoven and elastic, and the tunnels resist un-stretching of stretched elastic strands by frictional or obstruction forces. An elastic assembly or structure comprising a first and second layer of material bonded at spaced apart bond sites is disclosed, with a plurality of elastic strands disposed in a non-linear manner between said first and second layer of material, so that said strands meander in a cross-machine direction and traverse a machine direction line, restraining movement of the strands by frictional forces between the strands and the non-woven layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.