American Can Company

American National Can Company

Neal E Langseder

Harlen E Wilkinson

Karl O Dassler

Friedrich Stein

A buckle resistant end for containers which is formed with an inwardly bowed countersink wall, a countersink groove defined by two unequal radii and a central panel wall stretched taut by accentuated doming.

Buckle resistant can end

Method of forming a buckle resistant can end

This invention relates in general to new and useful improvements to easy opening container ends. More particularly, it relates to a new improved method of forming a hinged connection between a tab and an end panel.

Environmental retained tab ends

Disclosed is a tool for use in a high speed progressive die which includes a spring loaded retaining member and cooperating recess surface to first position and hold the progression carried partially formed piece part prior to a forming operation which severely works the metal tending to warp, distort and lock same within the tool.

Tool for coining

A retained ring type lever tab for easy open containers. The tab is provided with two dog leg levers which join at the forward end to form a triangular nose. These levers which in cross section are made up of a pair of parallel flanges 0.050' in width connected by an outer curl of radius 0.030' are particularly effective in transferring the opening force to the displaceable panel in the end. The tab is characterized by a low weight and a high mechanical advantage.

Retained ring tab

A method of making a retained tab for a container end and a design for same are disclosed. The tab opens in such a way that multiple forms of stress are induced in the tab before the tab will break away from the end. Specifically, the tab endures first a bending stress and then a torsional stress. The mode of stress being defined by the construction of the tab.

Detachment resistant retained lever tab

A non-detachable fracture resistant lever tab for easy open containers. The tab is provided with a tongue with a high degree of bendability, the tip of which is staked to the central panel wall by means of a rivet. Bendability of the tongue is enhanced through the use of cooperative transitional planes of graduated coining which urge the bend line to form in an area of maximum coining. A method for manufacture of the tab is disclosed.

Growing community of inventors

Rolling Meadows, IL, United States of America

Neal E Langseder