Can end and method of manufacturing a can end

A can end, comprising a metallic end surface in which an opening is formed that is bounded by a closed margin of the end surface and that is closed by a closure piece of the metallic end surface, wherein the closure piece is separated from a surrounding end surface by a microgap extending at least sectionally along the closed margin of the end surface, wherein a first end region of the closure piece is connected to the surrounding end surface via a pivot bearing;

• and
• a tear-open member that engages at a second end region of the closure piece, said second end region being opposite the pivot bearing, so that a pivoting of the closure piece out of a plane defined by the opening is made possible by pulling at the tear-open member, wherein
• the microgap is interrupted between the first end region and the second end region by at least one holding web via which the closure piece and the surrounding end surface are connected to one another in a bonded manner.

A method of manufacturing a can end, wherein an at least regionally flat metal element is provided, and wherein

• a closure piece is punched out of the metal element and is reinserted into an opening formed by the punching process, and wherein
• the punching out is performed using a punching die that has a cutting edge having at least one recess.

A can end, comprising a metallic end surface in which an opening is formed that is bounded by a closed margin of the end surface and that is closed by a closure piece of the metallic end surface, wherein the closure piece is separated from a surrounding end surface by a microgap extending at least sectionally along the closed margin of the end surface, wherein

• an arrangement of venting notches is formed in the metallic end surface and is in connection with the microgap.