Easy-open can end, method for manufacturing can end, and beverage product filled in can container using the same
AssigneeKirin Beer Kabushiki Kaisha
InventorsTadashi Nishibe, Takahiko Okada
Life of this patent
Estimating the term…
Abstract
An easy-open can end including an inclined surface formed in a direction of a tab tail of a pull-tab from a center of a panel such that the center of the panel becomes a maximum concave portion, a lower surface of the pull-tab abuts on the inclined surface or is brought close to the inclined surface along the inclined surface, the pull-tab has a pit S formed by pressing-down forming, and the pull-tab is bent by the pit S. A method for manufacturing an easy-open can end including a process for pressing down part of an outer rim of the pull-tab after or at the same time as a process for fixing the pull-tab to the panel.
Claims5
An easy-open can end for a can comprising:
- a score that is carved into an opening piece shape in an upper surface of a panel, an opening piece that is surrounded by the score, and a pull-tab that is fixed to a center in the upper surface of the panel with a rivet interposed therebetween, wherein the opening piece is pushed down to open the can while the score is rip-opened by a nose portion of the pull-tab, an inclined surface is formed in a direction of a tab tail of the pull-tab from the center of the panel such that the center of the panel becomes a maximum concave portion of the panel, and is closest to the bottom of the can a lower surface of the pull-tab abuts on or is brought close to the inclined surface along the inclined surface, the pull-tab has a pit in an outer rim, the pit being formed by pressing-down forming, and the pull-tab is bent at the pit;
- wherein the outer rim in which the pit is provided has a portion located between two lines tangential to an outer circumference of the rivet and orthogonal to a direction from the rivet toward the tab tail, and the pit is provided in said portion.
A method for manufacturing an easy-open can end for a can comprising:
- a step of carving a score into an opening piece shape in an upper surface of a panel;
- and a step of fixing a pull-tab to the upper surface of the panel with a rivet interposed therebetween, the rivet being located in center of the panel, wherein part of an outer rim of the pull-tab is pressed down with a wedge-shape press to provide a pit after or at the same time as the step of fixing the pull-tab to the panel;
- wherein the outer rim in which the pit is provided has a portion located between two lines tangential to an outer circumference of the rivet and orthogonal to a direction from the rivet toward the tab tail, and the pit is provided in said portion;
- wherein, in pressing down with the wedge-shape press, an inclined surface is formed in a direction of a tab tail of the pull-tab from the center of the panel by pushing down the center of the panel such that the center of the panel becomes a maximum concave portion of the panel, and is closest to the bottom of the can and the pull-tab is formed such that the pull-tab is bent at the pit to abut on the inclined surface or to bring a lower surface of the pull-tab close to the inclined surface along the inclined surface.
Dependencies are inferred from the claim text.