Valve assembly for dispensing flowable materials
A valve assembly for dispensing a plurality of flowable materials, such as viscous fluids or powders, comprising a valve member having a plurality of inlets for the plurality of flowable materials and dispense outlets communicating with the inlets and a closure having one or more openings in a pattern that corresponds to the pattern of at least some of the outlets. The valve member and the closure are movable relative to each other between a closed position in which the outlets are closed and at least one dispensing position in which one or more openings in the closure are at least partially in register with the dispense outlets thus clearing the latter.
1. A valve assembly for dispensing a plurality of flowable materials, comprising:
a valve member having a plurality of inlets for the plurality of flowable materials and dispense outlets communicating with the inlets, and
a closure comprising a curved strip tensioned about the dispense outlets and having one or more openings in a pattern that corresponds to a pattern of at least some of the outlets,
wherein the valve member and the closure are movable relative to each other between a closed position in which the outlets are closed and at least one dispensing position in which one or more openings in the closure are at least partially in registery with the dispense outlets thereby opening the dispense outlets.
2. The valve assembly of claim 1 , wherein the closure comprises a plurality of openings arranged to simultaneously open and close a plurality of dispense outlets.
3. The valve assembly of claim 1 , wherein the valve member comprises a curved portion and the closure and the curved portion of the valve member are rotatable relative to each other about an axis of rotation.
4. The valve assembly of claim 1 , further comprising two or more strips for independently opening and closing two or more dispense outlets or groups of dispense outlets.
5. The valve assembly of claim 1 , wherein the valve member or the at least one strip comprises two or more outlets or openings or groups of outlets or openings, respectively, separated in the direction of relative movement.
6. The valve assembly of claim 1 , wherein the cross-section of the outlets and/or the openings are shaped to facilitate drop release.
7. The valve assembly of claim 1 , wherein the outlets are surrounded by a protruding rim.
8. An apparatus for dispensing flowable materials, comprising a valve assembly according to claim 1 , a plurality of containers for the flowable materials and a plurality of pumps, wherein the suctions lines of the pumps are connected to respective containers and the pressure lines are connected to the valve assembly.
9. An apparatus for dispensing flowable materials, comprising a valve assembly a valve member having a plurality of inlets for the plurality of flowable materials and dispense outlets communicating with the inlets, and
a closure having one or more openings in a pattern that corresponds to the pattern of at least some of the outlets,
wherein the valve member and the closure are movable relative to each other between a closed position in which the outlets are closed and at least one dispensing position in which one or more openings in the closure are at least partially in register with the dispense outlets thus clearing the latter,
a plurality of containers for the flowable materials and a plurality of pumps, wherein the suctions lines of the pumps are connected to respective containers and the pressure lines are connected to the valve assembly, and
wherein at least some of the pumps comprising a valve for selectively connecting the pump to the container or to the pressure line,
at least some of the containers comprising a stirrer, and
wherein at least some of the sets of a container and pump comprise an electric motor coupled to both the stirrer and to the valve.
10. The apparatus of claim 9 , wherein the electric motor is coupled to the valve by means of a one way coupling, which decouples the valve from the motor in a first direction.
11. The apparatus of claim 10 , wherein the electric motor is coupled to the stirrer by means of a one way coupling, which decouples the stirrer from the motor in a second direction, opposite to the first direction.
12. A module for use in an apparatus according to claim 9 , further comprising
a container in turn comprising a stirrer,
a pump connected with its suction line to the container and in turn comprising a valve for selectively connecting the pump to the container or to a pressure line or dispense opening, and
an electric motor coupled to both the stirrer and to the valve.
13. The module of claim 12 , wherein the electric motor is coupled to the valve by means of a one way coupling, which decouples the valve from the motor in a first direction.