Abstract: A piercing device, for capsules for preparing beverages, comprising a plate that can be associated with a capsule for infusions and at least one penetrator that protrudes at right angles from the plate toward the capsule and is provided with at least one external cutting edge for the penetration of at least part of the penetrator into the capsule as a consequence of the mutual approach of the plate and the capsule; passage duct is defined in the penetrator that terminates, at its ends, in a passage provided on the face of the plate that lies opposite the face provided with the penetrator, and at least one aperture provided in the part of the penetrator that can penetrate into the capsule for the passage of fluid from the face to the capsule or vice versa, the external cutting edge extending laterally to the penetrator along a helical profile.

Abstract: A piercing device, for capsules for preparing beverages, comprising a plate that can be associated with a capsule for infusions and at least one penetrator that protrudes at right angles from the plate toward the capsule and is provided with at least one external cutting edge for the penetration of at least part of the penetrator into the capsule as a consequence of the mutual approach of the plate and the capsule; passage duct is defined in the penetrator that terminates, at its ends, in a passage provided on the face of the plate that lies opposite the face provided with the penetrator, and at least one aperture provided in the part of the penetrator that can penetrate into the capsule for the passage of fluid from the face to the capsule or vice versa, the external cutting edge extending laterally to the penetrator along a helical profile.