SYSTEM FOR REJECTION OF TABLETS PRODUCED IN A ROTARY TABLET PRESS AND A METHOD OF REJECTION OF TABLETS
1 Assignment
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Accused Products
Abstract
A system for rejection of tablets produced in a rotary tablet press comprises pan ejection nozzle for sorting out defective tablets. The ejection nozzle is supplied with compressed gas through a supply line having an inlet end for connection with a source of compressed gas and an outlet end communicating with the ejection nozzle. The supply line is provided with a control valve controlled by a control unit in order to open the supply line when a defective tablet has been detected by the control unit. Furthermore, the supply line is provided with a sensor arranged between the control valve and the inlet end of the supply line and adapted to detect a variable indicative of a gas flow through the control valve in order for the control unit to generate an error signal in the case of malfunction of the control valve.
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Citations
39 Claims
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1-22. -22. (canceled)
- 23. 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) in order to 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) in order for the control unit (27) 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.
- 33. A method of rejection of tablets produced in a rotary tablet press, whereby a gas jet is directed 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, whereby the compressed gas is supplied to the ejection nozzle (15) through a supply line (23) from a source of compressed gas, whereby a control valve (26) arranged in the supply line (23) opens for the supply of gas when it receives a control signal from a control unit (27), the control unit (27) sending the control signal to the control valve (26) when it has detected a tablet to be sorted out, whereby a pressure sensor (28) arranged in the supply line (23) detects a variable indicative of a gas flow through the control valve (26), and whereby the system generated an error signal in the case of malfunction of the control valve (26), whereby the variable is detected by the sensor (28) in the supply line (23) from the source of compressed gas to the control valve (26), and whereby the control valve (26) opens for the gas flow next to the ejection nozzle (15), whereby the control unit (27) generated an error signal, if a predetermined drop of the pressure measured by the pressure sensor (28) is not detected by the control unit (27), when the control valve (26) is opened.
Specification