Patent ID: 8078329

Claim:
A rotary tablet press incorporating a system for rejection of tablets produced in the rotary tablet press, comprising an ejection nozzle ( 15 ) for direction of a gas jet at a tablet to be rejected, so that the tablet is redirected and thereby sorted out from the remaining tablets leaving the tablet press during production, the ejection nozzle ( 15 ) being supplied with compressed gas through a supply line ( 23 ) having an inlet end ( 24 ) for connection with a source of compressed gas and an outlet end ( 25 ) communicating with the ejection nozzle ( 15 ), the supply line ( 23 ) being provided with a control valve ( 26 ) controlled by a control unit ( 27 ) operable open the supply line ( 23 ) when a tablet to be sorted out has been detected by the control unit ( 27 ), and the supply line ( 23 ) being provided with a pressure sensor ( 28 ) adapted to detect a variable indicative of a gas flow through the control valve ( 26 ) the control unit ( 27 ) operable to generate an error signal in the case of malfunction of the control valve ( 26 ), characterized in that the sensor ( 28 ) is arranged in the supply line ( 23 ) between the control valve ( 26 ) and the inlet end ( 24 ) of the supply line ( 23 ), and in that the control valve ( 26 ) is arranged next to the ejection nozzle ( 15 ), wherein the control unit ( 27 ) is adapted to generate an error signal, if a predetermined drop of the pressure measured by the pressure sensor is not detected by the control unit, when the control valve ( 26 ) is opened.