Process for making filament having unique tip and surface characteristics
US9340903B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2014 |
| Grant date | May 17, 2016 |
| Priority date | — |
| Expiry date | Nov 14, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA46D1/0246
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for making a filament for use in a brush implement comprises providing a composite filament comprising an external material and at least one internal material, wherein the tip surface comprises the internal material surrounded by the external material, the internal material having longitudinal shrinkage characteristics that differ from those of the external material; and causing the internal material to shrink inside the external material, whereby the internal material comprising the tip surface sinks relative to the external material comprising the tip surface so that at least one crater is formed at the tip surface of the filament, the at least one crater comprising a bottom formed by the internal material and walls formed by the external material, the at least one crater having a surface edge of a predetermined size and a predetermined shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.