초록 ▼

A can end having an improved pour-type ecology opening mechanism includes a conventional can end wall that contains a score line that defines a displaceable panel. The score line includes an initial design rupture point, a radiused portion having a first tangent point and a second tangent point, and

A can end having an improved pour-type ecology opening mechanism includes a conventional can end wall that contains a score line that defines a displaceable panel. The score line includes an initial design rupture point, a radiused portion having a first tangent point and a second tangent point, and a main portion that terminates at a final transition point. The can end further includes a tab having a liftable heel portion and a tab nose portion, with the tab nose portion being positioned to apply downward pressure to the panel at a pressure point on the displaceable panel when the heel portion is lifted. The tab has a center line that is coincident with a radius of said can end wall. Advantageously, the pressure point is positioned a distance, taken in the direction of the center line, from the second tangent point of the radiused portion that is selected to prevent a buildup of force that would otherwise hasten propagation of separation along the main portion of the score. This prevents splashing of the beverage during opening of the can by the consumer.

대표청구항 ▼

[ What is claimed is:] [1.] A can end having an improved pour-type ecology opening mechanism, comprising:a can end wall;a score line in said can end wall that defines a displaceable panel, said score line having(i) a first portion on which an initial design rupture point is disposed,(ii) a main port

[ What is claimed is:] [1.] A can end having an improved pour-type ecology opening mechanism, comprising:a can end wall;a score line in said can end wall that defines a displaceable panel, said score line having(i) a first portion on which an initial design rupture point is disposed,(ii) a main portion that terminates at a final point, said main portion comprising a first section having a first curvature, and(iii) an intermediate portion that extends from said first portion to said first section of said main portion, said intermediate portion having a second curvature defined by a first radius of curvature that is constant throughout said intermediate portion, said first curvature being different from said second curvature, whereby said curvature changes between said first section of said main portion and said intermediate portion, said intermediate portion intersecting said first section of said main portion at a first intersection point defined by said change in curvature;a tab having a liftable heel portion and a tab nose portion, said tab being fastened to said can end wall at a location that is intermediate said heel portion and said tab nose portion, said tab nose portion being positioned to apply downward pressure to said panel at a pressure point on said displaceable panel when said heel portion is lifted, said tab having a center line that is substantially coincident with a radius of said can end wall; andwherein said pressure point is positioned a distance D.sub.4, taken in the direction of said center line, from said first intersection point, and wherein the distance D.sub.4 is within a range of about minus 0.025 inches to about plus 0.025 inches, whereby a buildup of force that would otherwise hasten propagation of separation along said main portion of said score is avoided.