Powder feeding apparatus
US4938385A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Apr 12, 1989 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Apr 12, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B7/60
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A powder feeding device comprising a metering hopper for metering a powdery material supplied from a holding hopper, a weight measuring device for measuring the weight of the powdery material in the metering hopper, a device for opening and closing a discharge opening formed in the metering hopper and a control device for controlling the action of the opening and closing device. The control device has a timer, a device for setting a discharge interval, and a device for correcting the standard discharge interval set by the discharge interval setting device. The discharge interval correcting device corrects the standard discharge interval on the basis of a measured signal from the weight measuring device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.