Abstract: A sensor unit for measuring a mass flow rate of a liquid hot-melt adhesive is disclosed. The sensor unit includes a flow channel for the hot-melt adhesive, a first temperature measurement device positioned at a first position in the flow channel, a second temperature measurement device positioned at a second position in the flow channel and a heating device assigned to the second temperature measurement device, and a control unit for controlling the heating device and for measuring the mass flow rate. The controller is configured to adjust the temperature of the heating device assigned to the second temperature measurement device to a value, to determine the heating power for heating the heating device assigned to the second temperature measurement device, and to calculate the mass flow rate in the flow channel. The first and second temperature measurement devices are arranged substantially parallel to each other in the flow channel.

Abstract: The invention relates to a metering device (5) for a fluid, in particular hot melt adhesive, adapted for use with a dispensing apparatus (1) for said fluid or a remote metering apparatus (16) for transporting said fluid, comprising a housing (28), said housing comprising a fluid inlet and one or more fluid outlets, a gear (34) which is rotatably supported in said housing (28) and inserted in a gear chamber (31) in the housing (28) such that a cavity for fluid transport is formed in between two adjacent teeth and said housing (28), one or more chamber inlets in fluid communication with said fluid inlet and said gear chamber (31) such that fluid may flow into said gear chamber (31).

Abstract: A sensor unit for measuring a mass flow rate of a liquid hot-melt adhesive is disclosed. The sensor unit includes a flow channel for the hot-melt adhesive, a first temperature measurement device positioned at a first position in the flow channel, a second temperature measurement device positioned at a second position in the flow channel and a heating device assigned to the second temperature measurement device, and a control unit for controlling the heating device and for measuring the mass flow rate. The controller is configured to adjust the temperature of the heating device assigned to the second temperature measurement device to a value, to determine the heating power for heating the heating device assigned to the second temperature measurement device, and to calculate the mass flow rate in the flow channel. The first and second temperature measurement devices are arranged substantially parallel to each other in the flow channel.

Abstract: The invention relates to a metering device (5) for a fluid, in particular hot melt adhesive, adapted for use with a dispensing apparatus (1) for said fluid or a remote metering apparatus (16) for transporting said fluid, comprising a housing (28), said housing comprising a fluid inlet and one or more fluid outlets, a gear (34) which is rotatably supported in said housing (28) and inserted in a gear chamber (31) in the housing (28) such that a cavity for fluid transport is formed in between two adjacent teeth and said housing (28), one or more chamber inlets in fluid communication with said fluid inlet and said gear chamber (31) such that fluid may flow into said gear chamber (31).

Abstract: A device for applying fluids to a moving substrate has at least one nozzle system provided with fluid from a supply channel that is coupled to a fluid source. A valve system cooperating with the nozzle has a valve element that is movable between open and closed positions, relative to an associated valve seat, to selectively dispense fluid from the nozzle. The device further includes at least one sensor configured to sense a position of the valve element relative to the valve seat. Signals from the sensor are utilized by a controller to generate control signals that regulate operation of the valve element.