Patent ID: 8096451

Claim:
An apparatus for volumetric batching of granular or powder products in a container, which comprises: a hopper for containing the granular or powder products; at least a batching chamber for receiving a predefined volume of the product from the hopper during a loading stage of the batching chamber; a gas-permeable wall delimiting a bottom wall of the batching chamber; aspirating means for placing the batching chamber in depression, through the gas-permeable wall, during the loading stage; blowing means, activated alternatingly to the aspirating means in a subsequent delivery stage, which generate a pressurized gas jet which is injected into the batching chamber through the permeable wall and is able to project the predefined volume of granular or powder product towards the container, with the apparatus being constituted by at least a modular operating unit, characterized in that it comprises: a chute, inferiorly associated to the hopper and extending downwards, for conveying the granular or powder product towards the underlying container; a rotary obturator arranged with a substantially horizontal axis, for transversally occluding the chute, provided laterally with an opening for setting the chute in communication with the batching chamber, the batching chamber being realized internally of the body of the obturator and delimited, on an opposite side with respect to the opening, by the gas-permeable wall; a conduit, associated to the obturator and connected, at an end thereof, to the batching chamber via the permeable wall, and at another end thereof, to the aspirating and blowing means; motorized organs for commanding rotations of the obturator, by action of which the opening is alternatively oriented upwards, during the loading stage, in order to enable the granular or powder product, falling from the hopper and introduced into the upper part of the chute, to enter the batching chamber, and is alternatively oriented downwards, during the delivery stage, to enable the predefined volume of granular or powder product to exit the batching chamber and enter the lower part of the chute to descend towards the container.