Two-ply athletic sock with low-friction interface surfaces
US4571960A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1982 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Sep 30, 2002 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD10B2403/023
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The sock has at least a foot portion consisting of a first inner layer or ply disposed within and attached to a second outer layer or ply. The first or inner ply has (a) an inner (next-to-the-foot) surface comprising a plurality of moisture-absorbing fibers such as cotton fibers around which a yarn such as a nylon yarn is spirally wound and also has (b) an outer surface comprising yarns of nylon, for example, having relatively low friction characteristics compared with said inner surface. The second or outer ply, has (a) an inner surface comprising yarns of nylon, for example, which also have relatively low friction characteristics and (b) an outer surface plaited on the yarns of the inner surface comprising a plurality of moisture-absorbing fibers such as cotton around which a yarn such as nylon is spirally wound. The interface between the surfaces, having relatively low friction characteristics, permits the inner ply (in use) to slide relative to the outer ply for greater foot comfort and avoidance of blisters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.