초록 ▼

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 pa

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.

대표청구항 ▼

A lever tab for easy open ends comprising: (a) a pair of dog leg levers disposed symmetrically about a longitudinal axis, each lever including an upper planar flange and a lower planar flange said planar flanges being parallel one to the other and at least 0.050″in width and wherein said flanges are

A lever tab for easy open ends comprising: (a) a pair of dog leg levers disposed symmetrically about a longitudinal axis, each lever including an upper planar flange and a lower planar flange said planar flanges being parallel one to the other and at least 0.050″in width and wherein said flanges are joined by a curl with a radius of 0.030″and wherein said levers are formed with a short forward leg and a long lateral leg with said forward legs joined together to form the nose of said tab with an included angle therebetween of 150°and wherein said lateral legs are inclined at an angle of 3°to said longitudinal axis with the included angle between said forward leg and said lateral leg of 108°, (b) a raw edge at said nose and being in the plane of said upper planar flange in the area where said forward legs joined together and said nose including portions about said raw edge in the plane of said lower planar flange for contact with an end; (c) a web joining said levers, the forward portion of said web being recessed to form a deboss panel with ascending walls inclined at an angle of about 60°to said deboss panel, said ascending walls joining said upper flange with said deboss panel to strengthen and buttress said upper flange against collapse and wherein said deboss panel is lanced to form a tongue for attachment in the plane of said lower planar flange to hold the portions of said nose against an end and wherein the rear portion of said web is apertured to provide a finger hole; (d) a tab lift disposed rearward of said tab nose and transversely to said longitudinal axis, the extremities of said lift joining said lateral legs to form a pentagonal tab with a narrow nose and wide lift; and (e) said tongue attachment being less than half as far as from said lower flange portions about said edge than said lift.