Loss-in-weight feeder system
US5081600A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1989 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Nov 21, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D7/0611
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A loss-in-weight feeder for discharging a flowable material from a reservoir through a controllable discharge member, including a closed loop controller configured to compare the actual rate at which material is discharged from the reservoir to a desired discharge rate. During the "refill" mode of operation, the desired discharge rate is adjusted as a function of both the density of the incoming material and the current weight of material in the reservoir. During steady-state operation, the discharge rate is adjusted in accordance with, inter alia, short term changes in the actual discharge rate which exceed a predetermined threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.