A method for manufacturing a tear-off lid (27). A lid blank (9) is punched with a punching tool (1, 5) having a die (6) and a cutting punch (2, 3) to form a lid ring (8) with a central removal opening (17) surrounded by a sealing flange (18). The edge of the removal opening (17) is then formed by drawing to a collar (20) projecting from the sealing flange (18) on the intended inside of the lid (underside), the collar (20) is rolled up at its free end and a tear-off foil (24) is sealed or glued onto the sealing flange (18) on the intended outside of the lid (upper side).

In accordance with the invention, the die (6) is arranged on the inner side (bottom) of the lid and the cutting punch (2, 3) is moved into the die (6) from the outer side (top) of the lid while punching out a punched pad (16) and the punched pad (16) is conveyed by compressed air through the die (6) to a conveyor (33) by means of which it is removed from the tool area.

It has been shown that by this measure the known and established processes and devices for the production of tear-off lids can be modified with very little effort in such a way that during the punching of the lid blank (9) the punching or cutting pad is produced on the intended inner side (underside) of the produced lid ring (8), which is desirable when producing lids with “re-verse curl”.

A machine for manufacturing a closure that has: a workspace for receiving a blank, a rim punch arranged to engage a blank received within the workspace, a center punch arranged radially inside the rim punch, the center punch arranged to engage the blank received within the workspace to form a closure, and an ejection pin arranged to cause the center punch to move such that the closure disengages from the rim punch.

A lid suitable for closing a metal can includes a metal ring onto which a peelable membrane is sealed. An inner annular part of the metal ring is equipped with a roll defining an annular space therebetween. The first connection portion of the roll and the second connection portion of the inner annular part opposite are sealed to one another by element of a heat-sealing material to form a seal sealing the annular space so at to protect the free edge of the roll. The invention also relates to a method for producing such a lid.

Equipment and related methods for manufacturing ring pull crowns are disclosed herein. In one embodiment, a method of manufacturing a ring pull crown may include forming a plurality of crown bodies from a first source material, and forming a plurality of pull ring and tab assemblies from a second source material. In addition, such a method may include forming a plurality of ring pull crowns by combining each crown body of the plurality of crown bodies with a corresponding pull ring and tab assembly from the plurality of pull ring and tab assemblies. Also, such method may also include forming a circumferential skirt that descends below a top of each ring pull crown, and removing the plurality of ring pull crowns from the first source material.

Equipment and related methods for manufacturing ring pull crowns are disclosed herein. In one embodiment, a method of manufacturing a ring pull crown may include forming a plurality of crown bodies from a first source material, and forming a plurality of pull ring and tab assemblies from a second source material. In addition, such a method may include forming a plurality of ring pull crowns by combining each crown body of the plurality of crown bodies with a corresponding pull ring and tab assembly from the plurality of pull ring and tab assemblies. Also, such method may also include forming a circumferential skirt that descends below a top of each ring pull crown, and removing the plurality of ring pull crowns from the first source material.

To manufacture a metal can having a tear-open lid and having a storage space for an object above the tear-open lid, the following procedure is used: first, a top edge of the can which has a smaller diameter than the inside diameter of the can body is formed, wherein a transition region (6) is formed. After the tear-open lid has been attached, this transition region is deep drawn so that the tear-open lid (2) is displaced towards the bottom (5) of the can. This produces the storage space. This procedure allows previously formed tear-open lids to be used, which safely guarantees the imperviousness of the seal of the tear-open lid.

A method for forming a deep draw closure cap includes draw forming a first cup from a planar sheet of a metal material defining a base thickness. The first cup comprises a first cup base, a first cup wall, and an open end. A first redrawing of the first cup is performed to form a first redrawn cup including a first redrawn cup base, a first redrawn cup wall, and an open end. The first redrawn cup is passed through an ironing die to reduce a thickness of the first redrawn cup wall adjacent to the open end.

In the area of manufacturing covers with tear-open foils, the cover blanks, or covers are always secured against an undesired take-off from the transport means during the transport and the processing. This allows a very high manufacturing cadence equally for light covers and particularly for aluminium covers.

A reduced length ecology tab is provided for a can end. The can end includes an end panel and a rivet affixing the tab to the end panel. The tab includes a body having first and second opposing ends, and a length measured by the distance between the first end and the second end. A nose portion is disposed at or about the first end, and a lift portion is disposed at or about the second end. The length of the tab is less than 0.985 inch.

A can lid comprises a metallic lid surface in which an opening is formed which is bounded by a closed margin of the lid surface and which is closed by a closure piece. The closure piece is separated from the surrounding lid surface by a microgap extending at least sectionally along the margin of the lid surface. A margin of the closure piece and the margin of the surrounding lid surface adjoin one another at the microgap. The closure piece can be moved out of the plane defined by the opening to release the opening. The can lid further comprises a layer composed of a plastic material applied to a flat side of the metallic lid surface in a manner covering the microgap. The margin of the closure piece and the margin of the surrounding lid surface are offset from one another transversely to the plane defined by the opening.