초록 ▼

A pilferproof or tamper resistant cover or lid for a container comprising a skirt having on its inner surface a circumferential nose for engaging a flange at an upper end of the container and a tear-off safety band having an inwardly inclined generally half tear-shaped cross-sectional form adapted t

A pilferproof or tamper resistant cover or lid for a container comprising a skirt having on its inner surface a circumferential nose for engaging a flange at an upper end of the container and a tear-off safety band having an inwardly inclined generally half tear-shaped cross-sectional form adapted to be snugly received in a groove of the container below the flange thereof.

대표청구항 ▼

[ What we claim is:] [1.] A pilferproof cover having an axial centerline, for a container, comprising:a circular end wall having an upper end surface and an outer periphery having a diameter;a cylindrical skirt extending downwardly from the outer periphery of the end wall and having a lower end and

[ What we claim is:] [1.] A pilferproof cover having an axial centerline, for a container, comprising:a circular end wall having an upper end surface and an outer periphery having a diameter;a cylindrical skirt extending downwardly from the outer periphery of the end wall and having a lower end and a radially inner surface and an outer axial surface;means for removably retaining the cover on a container, said means being provided on the radially inner surface of the skirt;an annular tear-off safety ring extending downwardly and radially inwardly from the lower end of the skirt, said safety ring having an upper end and a lower end, the upper end of the safety ring being connected by means of a circumferentially extending rupturable connection to the lower end of the skirt, the safety ring having a generally convex inwardly bulged inner surface;wherein the safety ring has a generally flat outer surface tapering inwardly relative to the outer surface of the skirt;wherein the flat outer surface forms a first acute angle with a line extending parallel to the axial centerline of the cover, said flat outer surface extending substantially from the upper end of the safety ring to the lower end thereof, and said inner surface has an upper generally flat surface section extending from the upper end of the safety ring and a lower curved surface section extending from the flat surface section to the lower end of the safety ring, said upper flat surface section forming, with said parallel line, a second acute angle which is larger than the first acute angle; andwherein the curved inner lower surface section of the safety ring has a first intermediate curved surface portion having a first radius of curvature, a second curved surface portion between the intermediate curved surface portion and the flat inner upper surface section and having a second radius of curvature, and a third curved surface portion between the intermediate curved surface portion and the flat outer surface at the lower end of the safety ring and having a third radius of curvature, wherein the second radius of curvature is smaller than the first radius of curvature and the third radius of curvature is smaller than the second radius of curvature.