Filling machines
US4976296A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 1989 |
| Grant date | Dec 11, 1990 |
| Priority date | — |
| Expiry date | Jul 24, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65B39/04
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The disclosure relates to a dispensing unit for a filling machine for filling containers with particulate material comprising a nozzle having an outlet end for delivery of particulate material to a container. The nozzle is encircled by a downwardly facing seal to engage the upper open end of the container. The nozzle has an outer annular cavity terminating in an annular port around the open end of the nozzle in which a relatively high vacuum is drawn to evacuate the container and draw material through the passageway into the container. The nozzle has an inner annular cavity terminating in a porous wall encircling the discharge end of the nozzle in which a relatively low vacuum is drawn to adhere material in the nozzle to the wall of vacuum and terminate flow through the nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.