Needling loops into carrier sheets
US7562426B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2005 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Jan 1, 2027 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD04H11/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Methods of forming a loop product are provided. Some methods include (a) introducing a sheet-form substrate and a layer of polymeric fibers into a needle loom, with the fibers disposed on a first surface of the substrate, and (b) needling the fibers through the substrate to form hook-engageable loop structures of the fibers extending from a second surface of the substrate through holes formed in the substrate by the needling. Needling the fibers includes piercing the substrate with a plurality of needles while advancing the substrate in a machine direction at a predetermined speed, while cyclically advancing the needles in the machine direction, during piercing of the substrate, in a manner that causes the needles to travel in a substantially elliptical path, such that while the needles extend through the substrate the needles are moving in the machine direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.