Method of manufacturing toothbrush with needle-shaped bristles and toothbrush manufactured by the same
US7832811B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Dec 10, 2004 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | Nov 30, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA46D9/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a method of manufacturing a toothbrush with needle-shaped bristles. The method includes the step of setting needle-shaped bristles, partially tapered by being immersed in a chemical, in a head part of a toothbrush body. The method further includes the step of grinding the needle-shape bristles using a drum grinder having protrusions (10) such that end points of the bristles range from 0.01 to 0.03 mm in thickness and tapered portions of the bristles range from 3.5 to 8 mm in length. A toothbrush, in which needle-shaped bristles having end points of 0.03 to 0.05 mm in thickness and tapered portions of 3.5 to 10 mm in length are set, can be manufactured using the method of the present invention. In the present invention, because a manufacturing process is simplified, the required production time and a defective proportion are markedly reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.