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AssigneeFocke & Co. (GmbH & Co.)
InventorsMartin Wiehe, Martin Eilts, Jan-Christian Walter
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An application device for applying a flowable medium onto a substrate, having a discharge valve having a closure member which, in its open position, releases a metering opening of the discharge valve, such that the flowable medium can flow through the metering opening in the direction of the substrate, wherein the closure member is movable by an electromagnet of the discharge valve from a closing position, in which it closes the metering opening, to an open position, and having a main control unit, which is connected to the discharge valve, and which delivers electrical output voltage signals which moves and maintains the closure member to the open position. A modification unit is arranged between the main control unit and the discharge valve, which is configured such it receives output voltage signals from the main control unit, modifies these signals and relays the latter in a modified form to the electromagnet.
An application device for applying a flowable medium onto a substrate the device having a discharge valve (13) comprising a closure member which, in an open position, releases a metering opening of the discharge valve, such that the flowable medium is flowable through the metering opening in a direction of the substrate, wherein the closure member is movable by an electromagnet of the discharge valve (13) from a closing position, in which the discharge valve (13) closes the metering opening, to the open position, and comprising a main control unit (17), which is connected to the discharge valve (13), and which delivers output voltage signals for controlled voltage supply of the electromagnet, the output voltage signals move the closure member to the open position and maintain the closure member in the open position, further comprising a modification unit (19) arranged between the main control unit (17) and the discharge valve (13), the modification unit (19) configured such that the modification unit (19) receives the output voltage signals from the main control unit (17), modifies the output voltage signals, and relays the output voltage signals in a modified form to the electromagnet, wherein the main control unit (17) is configured such that, for each movement of the closure member from the closing position to the open position, the main control unit (17) respectively generates an output voltage signal which is sufficient to move the closure member, by action of the electromagnet, from the closing position to the open position, and wherein the modification unit (19) is configured such that the modification unit (19) modifies each respective output voltage signal during a modification time interval (22), such that a mean voltage amplitude of the respective output voltage signal over the modification time interval (22) is lower than a respective unmodified output voltage signal, and wherein a respective modification time interval (22), during which the respective output voltage signal is modified, respectively succeeds a time interval in which no modification of the respective output voltage signal is executed, and in which the voltage amplitude of the output voltage signal which is relayed to the electromagnet corresponds to a voltage amplitude of the respective unmodified output voltage signal which is generated by the main control unit (17).
A modification unit for an application device for applying a flowable medium onto a substrate, wherein the application device is provided with a discharge valve (13) comprising a closure member which, in an open position, releases a metering opening of the discharge valve (13), such that the flowable medium is flowable through the metering opening in a direction of the substrate, wherein the closure member is movable by an electromagnet of the discharge valve (13) from a closing position, in which the discharge valve (13) closes the metering opening, to the open position, and wherein the application device comprises a main control unit (17), which is connected to the discharge valve (13) and which delivers output voltage signals for controlled voltage supply of the electromagnet, the output voltage signals move the closure member to the open position and maintain the closure member in the open position, and wherein the modification unit (19) is configured such that the modification unit (19) is arrangeable between the main control unit (17) and the discharge valve (13), receives the output voltage signals from the main control unit (17), modifies the output voltage signals, and relays the output voltage signals in a modified form to the electromagnet, and wherein the modification unit (19) is configured such that the modification unit (19) modifies each respective output voltage signal generated by the main control unit (17) for a movement of the closure member from the closing position to the open position, which is sufficient to move the closure member, by the action of the electromagnets, from the closing position to the open position, during a modification time interval (22), such that a mean voltage amplitude of the respective output voltage signal over the modification time interval (22) is lower than a respective unmodified output voltage signal, and wherein the respective modification time interval (22), during which the respective output voltage signal is modified, respectively succeeds a time interval in which no modification of the respective output voltage signal is executed, and in which the voltage amplitude of the output voltage signal which is relayed to the electromagnet corresponds to a voltage amplitude of the respective unmodified output voltage signal which is generated by the main control unit (17).
Dependencies are inferred from the claim text.