Process for rounding the bristle tips of toothbrushes and toothbrushes prepared by this process
US4762373A · kind A · utility
17Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1986 |
| Grant date | Aug 9, 1988 |
| Priority date | — |
| Expiry date | Sep 5, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA46B2200/1066
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method for rounding the bristle tips of toothbrushes by the action of laser radiation, characterized in that the rounding process is effected in an electrostatic field, thus avoiding the fusion of the individual bristles as well as the formation of a mushroom-like bristle tip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.