Powder dosing device
View Patent ↗A power measure-dispensing cap including a body having a first end face, which is designed to be brought into contact with a powder container, and a second end face which, together with the first end face, defines at least one feed opening which flares out towards the first end face, the feed opening supplying at least one endless screw; and at least one opening. The opening is disposed in the second end face in contact with the endless screw.
1. A powder dosing cap, comprising a body having a first end face designed to be brought into communication with a powder container, a second end face opposite the first end face at least one feed hopper within the body, the feed hopper in communication with at least one endless screw, wherein the feed hopper widens toward the first end face and at least one dispensing opening for the powder to be dispensed, wherein the dispensing opening is positioned on the second end face and is always in communication with the endless screw, and wherein the dispensing opening has the shape of a triangle centered on the axis of the endless screw and having an angle opening in the direction of dispensing of the endless screw.
2. The powder dosing cap as claimed in claim 1 , wherein the dispensing opening is formed within a thickness less than the full thickness of the second end surface, toward the inside of the cap.
3. The powder dosing cap as claimed in claim 1 , comprising a means of closing all or part of the dispensing opening in order to permit modification of the surface area of said opening.
4. The powder dosing cap, comprising a body having a first end face designed to be brought into communication with a powder container, a second end face opposite the first end face at least one feed hopper within the body, the feed hopper in communication with at least one endless screw, wherein the feed hopper widens toward the first end face and at least one dispensing opening for the powder to be dispensed, wherein the dispensing opening is positioned on the second end face and is always in communication with the endless screw, wherein the closure means comprises at least one element covering all or part of the second end face, said element being movable relative to the second end face and having a through-hole which can be positioned opposite the dispensing opening, and a means of closing all or part of the dispensing opening in order to permit modification of the surface area of said opening.
5. The powder dosing cap as claimed in claim 1 , wherein the endless screw can function by being rotated in one direction or in the opposite direction.
6. The powder dosing cap as claimed in claim 1 , wherein the endless screw comprises a transmission member designed to permit rotation of the endless screw.
7. The powder dosing cap as claimed in claim 1 , wherein the endless screw is coupled to a device by means of which it is possible to vary and control the angle of increment of rotation or the speed of rotation of the endless screw by acting on the transmission member giving a rotary movement of the screw and/or is coupled to a device promoting the dispensing of the powder.
8. The powder dosing cap as claimed in claim 1 , further comprising a device promoting the dispensing of the powder by vibration and/or by tapping of the dosing cap and/or of the powder container.
9. The powder dosing cap as claimed in claim 8 , wherein the device promoting the dispensing of the powder by tapping is a retractable finger.
10. The powder dosing cap as claimed in claim 8 , wherein the device promoting the dispensing of the powder by vibration is a holding fork.
11. The powder dosing cap as claimed in claim 1 , additionally comprising an agitator placed inside the feed hopper.
12. The powder dosing cap as claimed in claim 11 , wherein the agitator is an element rotating about an axis substantially perpendicular to the first and/or second end face.
13. The powder dosing cap as claimed in claim 11 , wherein the agitator is an endless screw.
14. The powder dosing cap as claimed in claim 1 , further comprising at least one antistatic device.
15. The powder dosing cap as claimed in claim 1 , wherein the parts of which it is made up are of a material which is thermally stable under the conditions of use and of storage and chemically inert to the powders to be dosed, such as polyethylene, polypropylene, and fluoropolymers, such as polytetrafluoroethylene.
16. A powder dosing device comprising a powder container brought into communication with a dosing cap as claimed in claim 1 .
17. A process for dosing powders comprising a step of using the powder dosing device as claimed in claim 1 .
18. The powder dosing cap as claimed in claim 11 , wherein the agitator is a drill.
19. The powder dosing cap as claimed in claim 4 , wherein the dispensing opening has a shape selected from the group consisting of a triangle, quadrilateral, circle or ellipse.
20. The powder dosing cap as claimed in claim 4 , wherein the endless screw can function by being rotated in one direction or in the opposite direction.