Embossed Can Shoulder Structure for Buckling-Free Seaming

The patent applies internal embossing instead of external pressing to form the uneven pattern on the shoulder portion. By pressing the formation die from the inside of the can rather than from the outside, the method prevents abnormal deformation and buckling of the thinned shoulder portion while still achieving the desired embossed pattern.

The embossed portion is localized to specific regions of the shoulder portion rather than applying uniform deformation across the entire shoulder area. This localized embossing approach concentrates the deformation in controlled areas, preventing overall buckling and maintaining the structural integrity of the thinned can.

The embossed portion is strategically localized to specific regions of the shoulder portion that do not interfere with the seaming process. By controlling the position and distribution of embossed features, the patent achieves decorative purposes while maintaining reliable lid seaming in the critical sealing areas.

The shoulder portion is functionally segmented into different zones: areas with embossed patterns for decoration and areas without embossing for reliable seaming. This segmentation allows the design to simultaneously achieve aesthetic appeal and manufacturing reliability by separating decorative functions from critical sealing functions.