Method for producing a toothbrush head
US11832717B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2020 |
| Grant date | Dec 5, 2023 |
| Priority date | — |
| Expiry date | Dec 12, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA46D3/082
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method for producing a toothbrush head, comprising: providing at least two filament containers, each comprising a supply of loose filaments that differ in at least one of their property selected from material, diameter, cross-section, shape, and presence of additives and/or coating; picking bristle tufts from the containers and arranging them in a perforation plate comprising holes shaped and distributed according to a desired bristle field of the brush head to be produced; arranging an energy source and the ends of the tufts in a contactless arrangement, wherein the ends of the tufts to be fused are at different distances from the energy source, and wherein the distance is adjusted according to the at least one property; applying energy to the ends of the tufts until fuse balls are formed thereon; transferring the tufts to a molding position, wherein a distance between at least one fuse ball and the front surface is different from the distance between the bottom edge of said fuse ball and the front surface in the fusing position; over-molding the fuse balls with molten plastic material thereby forming a cleaning element carrier; transferring the cleaning element carrier to a bru…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.