Composite sheet and process and apparatus for producing the same
US7468114B2 · kind B2 · utility
39Cited by
10References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2003 |
| Grant date | Dec 23, 2008 |
| Priority date | — |
| Expiry date | Oct 22, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24678
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A composite sheet comprising an upper layer 2 and a lower layer 3 both made of a substantially inextensible sheet which are partially bonded to each other at a large number of joints 4. The upper layer 2 forms a large number of outward hollow projections 5 in the area other than the joints 4. The projections 5 and the joints 4 are arranged such that the projections and the joints alternate in one direction to make lines and that the projections in each of the lines are out of alignment with the projections in the adjacent lines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.