A crimping structure of a small irregular can and a manufacturing method thereof, in particular to a seam method for buckling a bottom by stamping. The crimping structure includes a can body crimping edge and a can bottom crimping edge made of a plate material of a same type, wherein the can body crimping edge covers the can body crimping edge to crimp 90 degrees inward. A four-layer structure with a first can body crimping edge layer, a can bottom crimping edge layer, a second can body crimping edge layer and a can bottom layer, arranged in a sequence, is formed. By adopting the above-mentioned four-layer crimping structure of the small three-piece irregular can, the sealing performance of the can body is greatly enhanced, effectively improving the moisture-proof performance, thereby protecting the safety of food in the can.

A drawn aluminum can shell has a peripheral crown which is double-seamed with an end portion of an aluminum can body to provide a can end having a generally flat center panel connected by an inclined curved or straight panel wall to an inclined inner wall of an annular U-shaped countersink. The countersink has an outer wall which connects with an inclined lower wall portion of a chuck wall at a junction below the center panel, and the chuck wall has a curved or inclined upper wall portion which connects with an inner wall of the crown. The chuck wall also has an intermediate wall portion forming a break, and the inner bottom width of the countersink is less than the radial width of the panel wall. The inclined upper wall portion of the chuck wall extends at an angle greater than the angle of the inclined lower wall portion of the chuck wall.

A drawn aluminum can shell has a peripheral crown which is double-seamed with an end portion of an aluminum can body to provide a can end having a generally flat center panel connected by an inclined curved or straight panel wall to an inner wall of an annular U-shaped countersink. The countersink has an outer wall which connects with a lower wall portion of a chuck wall, and the chuck wall has an upper wall portion which connects with an inner wall of the crown. The chuck wall also has an intermediate wall portion forming a break, and the inner bottom width of the countersink is less than the radial width of the panel wall.

The present invention relates to an end panel to be seamed by a double seam to a container body which double seam includes an end hook confined by the container body and a body hook, wherein a panel edge of the end panel forms the end hook and is provided with at least one notch, wherein the panel edge includes at least two adjacent edge parts of which a first edge part has a first radius and a second edge part has a second radius or is a straight edge, and the notch has a width to depth ration of about 10 to 150, and is formed in both adjacent edge parts, to a container body and to a container provided with such end panel.

A package made of sheet material with a tear-off foil cover includes a seamless frame (1) produced by deep drawing, which forms a package wall (6) enclosing the interior space of the package. At a first end (T), the frame (1) forms an extraction opening surrounded by a sealing flange (2), which is closed by a tear-off foil cover (3) sealed onto the sealing flange (2). At its other, second end (B), the frame (1) is connected by flanging to a sheet metal cover (4) which forms the package bottom (7). The package can be produced inexpensively with low energy and material consumption from both steel sheet material and aluminum sheet material, has no weld seams, can be tested for leaks before filling, and enables high filling speeds.

A container assembly includes a container body having a side wall encircling an axis, and a metal end for attachment to an upper edge of the side wall via heat-sealing. The outer peripheral region is shaped prior to application to the container body such that an annular channel is defined between an inner chuck wall and an outer chuck wall of the metal end. The metal end is pushed straight onto the side wall such that the upper edge of the side wall is received into the channel. The surfaces of the side wall and the opposing surfaces of the chuck walls have heat-sealable material thereon. The metal end is heated to melt and fuse the heat-sealable layers, thereby sealing the metal end onto the side wall. The metal end is shaped such that the free edge of the outer chuck wall is not exposed.

A can lid shell 10 includes a panel section 11 having a circular peripheral edge, a countersink section 12 formed and recessed along the peripheral edge of the panel section 11, a chuck wall section 13 rising from an edge of the countersink section 12, and a flange section 14 protruding from an upper end of the chuck wall section 13. The countersink section 12 includes a first curved surface portion 123C that is convex toward an internal space SP1. The chuck wall section 13 includes a second curved surface portion 131 that is connected to the first curved surface portion 123C and that is concave toward the internal space SP1. Furthermore, the second curved surface portion 131 and the first curved surface portion 123C are formed to be thicker as both are directed from an edge p8 on the flange section 14 side to an edge p6 on the panel section 11 side.