A feed unit for feeding closing elements designed for closing cup-shaped containers defining capsules for extraction or infusion beverages for a machine for packaging capsules for extraction or infusion beverages, comprising: - means for feeding a web of heat-sealable material along a predetermined path for feeding the web; - a plurality of pickup units (GP1, GP2, GP3, GP4), each pickup unit (GP1, GP2, GP3, GP4) comprising at least one pickup means and being movable individually along a first closed path between a pickup position, wherein the respective pickup means are positioned at a forming region for picking up the portions of the web defining a closing elements, and a release position, wherein the respective pickup means are positioned at a release region for releasing the closing elements picked up, the feed unit being characterized in that it further comprises: - a mould comprising a plurality of seats defining cutting edges; - a plurality of punches, each punch being designed to act in conjunction with a corresponding seat of the plurality of seats of the mould, the mould and the plurality of punches being positioned along the path for feeding the web in the forming region for forming the closing elements, the punches being movable between an operating position wherein they make contact with the web of heat-sealable material for cutting portions of the web so as to form corresponding closing elements, and a non-operating position retracted relative to the web of heat-sealable materials. - means for feeding a web of heat-sealable material along a predetermined path for feeding the web; - a plurality of pickup units (GP1, GP2, GP3, GP4), each pickup unit (GP1, GP2, GP3, GP4) comprising at least one pickup means and being movable individually along a first closed path between a pickup position, wherein the respective pickup means are positioned at a forming region for picking up the portions of the web defining a closing elements, and a release position, wherein the respective pickup means are positioned at a release region for releasing the closing elements picked up, the feed unit being characterized in that it further comprises: - a mould comprising a plurality of seats defining cutting edges; - a plurality of punches, each punch being designed to act in conjunction with a corresponding seat of the plurality of seats of the mould, the mould and the plurality of punches being positioned along the path for feeding the web in the forming region for forming the closing elements, the punches being movable between an operating position wherein they make contact with the web of heat-sealable material for cutting portions of the web so as to form corresponding closing elements, and a non-operating position retracted relative to the web of heat-sealable materials. - a mould comprising a plurality of seats defining cutting edges; - a plurality of punches, each punch being designed to act in conjunction with a corresponding seat of the plurality of seats of the mould, the mould and the plurality of punches being positioned along the path for feeding the web in the forming region for forming the closing elements, the punches being movable between an operating position wherein they make contact with the web of heat-sealable material for cutting portions of the web so as to form corresponding closing elements, and a non-operating position retracted relative to the web of heat-sealable materials.