Process for controlling a dosing device for liquid or pasty...

Dispensing – Automatic control – Constant weight – volume or pressure control by output

Reexamination Certificate

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Details

C222S001000, C222S063000, C901S043000

Reexamination Certificate

active

07967168

ABSTRACT:
A dosing apparatus includes a feed device for a liquid or pasty medium, which supplies the medium at a given preliminary pressure. A pressure control valve communicates with the feed device, a dosing pump is fluidically connected to the pressure control valve, a driving motor that drives the dosing pump, a discharge valve discharges the medium as a volume flow modifiable over time. A control and regulation device feeds a control signal to the pressure control valve in accordance with a predefined setpoint volume flow value. A comparator of the control and regulation device compares the input and output pressure values, and a control unit modifies the control signal fed to the pressure control valve in order to drive the difference between the input and output pressure values to a given value.

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