Granted Patent B2

US 12,522,453 · App. 18/442,950 · Granted Jan 13, 2026

Inventors: Stefan Wagner (Heldenstein, DE); Egon Grainer (Heldenstein, DE); Stefan Schöberl (Buchbach, DE); Stephan Untergehrer (Velden/Vils, DE)

Assignee: Netzsch Pumpen & Systeme GmbH (DE)

B65G65/38B65G2201/0241

Abstract

Claims (38)

1 . An emptying system for emptying a pasty material from a container, the emptying system comprising:

a container follower plate configured to be lowered into an interior of the container,

a removal opening formed in the container follower plate,

a pump that is in operative connection with the removal opening, the pump being configured to extract the material enclosed in a collection chamber defined between a container base of the container and the container follower plate,

wherein at least one agitator is provided in the collection chamber, the agitator being configured to impose a motion relative to the container follower plate upon the material enclosed in the collection chamber.

2 . The emptying system according to claim 1 , wherein the at least one agitator is a shearing strip, and

wherein the shearing strip is attached to a surface of the container follower plate facing the collection chamber and extends out from said surface into the collection chamber.

3 . The emptying system according to claim 2 , wherein the container follower plate is non-rotatable, and the emptying system includes a container carrier that is driven to rotate the container.

4 . The emptying system according to claim 1 , wherein the at least one agitator is a shearing strip,

wherein the shearing strip is disposed on an operative extension of a rotor of the pump, the operative extension extending through the container follower plate into the collection chamber such that the shearing strip is arranged within the collection chamber, and

wherein the container to be emptied is stationary.

5 . The emptying system according to claim 4 , wherein the operational extension is connected with the rotor by a reduction gear unit, so that the operational extension rotates at a speed that varies with respect to the rotor.

6 . The emptying system according to claim 2 , wherein the shearing strip comprises a crenellated crown that faces towards the container base.

7 . The emptying system according to claim 2 , wherein the at least one agitator comprises several shearing strips, each shearing strip having a crenellated crown, and

wherein each of the shearing strips spirals outward from a position adjacent to the removal opening towards a perimeter of the container follower plate.

8 . The emptying system according to claim 2 , wherein a side of the shearing strip which is oriented in a rotation direction is curved concave.

9 . The emptying system according to claim 2 , wherein an end of the shearing strip is arranged at an area adjacent the removal opening and extends out tangentially relative to a perimeter of the removal opening.

10 . The emptying system according to claim 1 , wherein the container follower plate comprises at least one exhaust valve for removing an air cushion in the collection chamber.

11 . The emptying system according to claim 1 , wherein the container follower plate is conical-shaped so that the container follower plate tapers toward the removal opening, wherein a cone angle of the container follower plate is between 1° and 10°.

12 . The emptying system according to claim 1 , wherein an outer periphery of the container follower plate comprises a flat seal,

wherein upon lowering the container follower plate in a lowering direction within the container, the flat seal is diverted in a direction opposite the lowering direction;

wherein the flat seal a radial width B and an axial width D subject to the following: B<2×D.

13 . The emptying system according to claim 1 , wherein the container follower plate is attached to a hollow column that is configured to raise and lower the container follower plate in relation to the container, and

wherein an eccentric screw pump is arranged inside the hollow column to draw the material by suction through the removal opening.

14 . A method for emptying a pasty material from a container comprising:

using an emptying system to pump and empty the pasty material from the container, the emptying system having:

a container follower plate configured to be lowered into an interior of the container,

a removal opening formed in the container lower plate,

a pump that is in operative connection with the removal opening, the pump being configured to extract the material enclosed in a collection chamber defined between a container base of the container and the container follower plate,

wherein at least one agitator is provided in the collection chamber, the agitator being configured to impose a motion relative to the container follower plate upon the material enclosed in the collection chamber,

wherein the material is preferably is warmed and then drawn by the agitator.

15 . The emptying system according to claim 4 , wherein the shearing strip comprises a crenellated crown that faces towards the container base.

16 . The emptying system according to claim 4 , wherein the at least one agitator comprises several shearing strips, each shearing strip having a crenellated crown, and

wherein each of the shearing strips spirals outward from a position adjacent to the removal opening towards a perimeter of the container follower plate.

17 . The emptying system according to claim 4 , wherein a side of the shearing strip which is oriented in a rotation direction is curved concave.

18 . The emptying system according to claim 4 , wherein an end of the shearing strip is arranged at an area adjacent the removal opening and extends out tangentially relative to a perimeter of the removal opening.

19 . The emptying system according to claim 11 , wherein the cone angle of the container follower plate is between 1° and 5°.

20 . The emptying system according to claim 12 , wherein the flat seal forms a lip seal.

Assignments (1)

Priority Claims (2)

Continuity (1)

References Cited (32)