Nozzle attachment for an adhesive dispensing device
US4969602A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1989 |
| Grant date | Nov 13, 1990 |
| Priority date | — |
| Expiry date | Sep 29, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C5/0225
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An apparatus for dispensing adhesive in an elongated strand or fiber in a controlled, spiral pattern upon a substrate comprises a dispensing device having a nozzle formed with an adhesive delivery passageway and an air delivery passageway both of which terminate at the base of the nozzle. A nozzle attachment in the form of an annular plate is mounted to the base of the nozzle by a cap. The annular plate is formed with a throughbore which receives hot melt adhesive from the adhesive delivery passageway and ejects an adhesive bead through a nozzle tip formed on the outer side of the plate opposite the nozzle. An annular groove formed in the outer side of the plate facilitates drilling of air jet bores therein at an angle relative to the throughbore and adhesive bead ejected therefrom. The air jet bores receive pressurized air from the air delivery passageway in the nozzle and direct jets of pressurized air substantially tangent to the adhesive bead to form an elongated adhesive fiber and to impart a spiral motion to the elongated adhesive fiber so that a compact, spiral pattern is formed for deposition onto a substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.