Apparatus for metering pulverulent filling material

1. An apparatus ( 8 ) for metering pulverulent filling material, comprising at least one metering wheel ( 11 ) having a central axis and a plurality of metering chambers ( 13 ) for accommodating filling material, wherein the plurality of metering chambers ( 13 ) are formed by means of common components ( 16 ), each of the common components ( 16 ) having multiple metering chambers ( 13 ), and the common components ( 16 ) being movable in a radial direction of the metering wheel ( 11 ) using an adjusting means ( 10 ) in order to change the volume of the metering chambers ( 13 ), wherein the adjusting means ( 10 ) includes a single element that moves each of the common components ( 16 ) radially, wherein each of the common components ( 16 ) includes a plurality of projections ( 18 ) disposed axially along the common component ( 16 ), wherein each of the common components ( 16 ) includes at least one cavity ( 19 ) to accommodate a supporting means ( 20 ), and wherein for each of the common components ( 16 ) a filter ( 12 ) is arranged between the common component ( 16 ) and openings ( 21 ) of the supporting means ( 20 ), each of the openings ( 21 ) corresponding to one of the projections ( 18 ), and each of the openings ( 21 ) being a through-hole through a wall of the supporting means ( 20 ).

2. The apparatus as claimed in claim 1 , characterized in that a spring means ( 30 , 30 ′) is provided for each of the common components ( 16 ), said spring means acting on the common component ( 16 ) for adjustment in the radial direction of the metering wheel ( 11 ).

3. The apparatus as claimed in claim 2 , wherein the spring means ( 30 , 30 ′) is engaged on a shoulder ( 17 ) of the common component ( 16 ).

4. The apparatus as claimed in claim 3 , wherein the shoulder ( 17 ) is defined by a recess on a radially outer side of the common component ( 16 ).

5. The apparatus as claimed in claim 3 , wherein the shoulder ( 17 ) is defined by a recess on a radially inner side of the common component ( 16 ).

6. The apparatus as claimed in claim 1 , characterized in that the filter ( 12 ) for each of the common components ( 16 ) is a single filter ( 12 ) shared by the metering chambers ( 13 ) for each of the common components ( 16 ).

7. The apparatus as claimed in claim 1 , characterized in that the supporting means ( 20 ) has a common air duct ( 28 ), which is connected to the metering chambers ( 13 ) for the common component ( 16 ).

8. The apparatus as claimed in claim 7 , characterized in that the air duct ( 28 ) is connected to a coupling part ( 26 ).

9. The apparatus as claimed in claim 1 , characterized in that clamping means ( 22 ) are provided for each of the common components ( 16 ), said clamping means pressing the supporting means ( 20 ) against the common component ( 16 ) in order to fix the filter ( 12 ).

10. The apparatus as claimed in claim 1 , wherein the single element includes a cam member disposed radially inwardly of each of the metering chambers ( 13 ).

11. The apparatus as claimed in claim 1 , wherein the single element rotates about the central axis.