Method of making a molded brush
US4907841A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1989 |
| Grant date | Mar 13, 1990 |
| Priority date | — |
| Expiry date | Feb 22, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA46B3/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A brush adapted for selective application of a flowable fluid to a workpiece--and which includes a hollow head section, a plurality of bristles depending from the head section, and a fluid distribution channel defined by a flexible membrane and extending substantially axially within the radial interior of the bristles from the head section of the brush toward the free ends of the bristles--is formed in its entirety of a heat-fusible synthetic material. A tuft of synthetic material in filamentary form is inserted into a mold cavity and a heated die is moved into closely proximate but predeterminately spaced apart relation with the mold for transferring to the mold sufficient heat to fuse the adjacent filament ends and form the brush head section. A heated pin is then inserted into and retracted from the mold cavity through the brush head section to form the distribution channel membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.