초록 ▼

5-gallon plastic molded bottles of at least two manufacturers have neck profiles which differ slightly but have a diameter where the variation in profile is at a minimum. The cap of this invention fits at least two profiles. In each profile there is an outward-convex bead below the top lip. The inte

5-gallon plastic molded bottles of at least two manufacturers have neck profiles which differ slightly but have a diameter where the variation in profile is at a minimum. The cap of this invention fits at least two profiles. In each profile there is an outward-convex bead below the top lip. The interior of the skirt of the cap curves concave approximately co-extensive with such bead curvature and has plural circumferential internal annular ridges which engage the bead at about its maximum diameter. Below the ridges is an internal annular tension ring having a diameter when unstressed less than the diameter of the top neck bead at its circle of contact which engages below the maximum bead diameter and hence tends to pull the ridges down into tighter engagement with the profiles of either manufacturers\neck finish. Below the tension ring the skirt is formed with a horizontal tear line which extends about 265°of the circumference of the skirt. A second score line curves down to the bottom edge of the skirt. A tear tab projects down adjacent the terminus of the curved score line. To properly seat the cap on the neck and to reduce resistance to the capping operation, narrow vertical internal ribs radially spaced apart are formed on the inner skirt slightly below the horizontal score line.

대표청구항 ▼

A cap for closing a bottle neck of the type having a top outward convex bead immediately below the top lip of the neck and an inward concave indented portion below said top bead, said cap comprising a top disc, a rounded corner at the periphery of said disc, a skirt below said corner having a convex

A cap for closing a bottle neck of the type having a top outward convex bead immediately below the top lip of the neck and an inward concave indented portion below said top bead, said cap comprising a top disc, a rounded corner at the periphery of said disc, a skirt below said corner having a convex outward bulge below said corner, a thickened-wall tension ring on the interior of said skirt at the lower edge of said bulge, said tension ring being positioned to engage the underside of said top bead when said cap is seated on said neck, said tension ring having an unstressed minimum diameter less than that of said top bead, said tension ring tending to contract and slide down the underside of said top bead and thereby pull said bulge toward engagement with the upper surface of said top bead, said cap further comprising a plurality of narrow, vertical stand-off ribs on the inside of said skirt at about the level of said indented portion when said cap is seated on said neck, said ribs being radially spaced apart, each said rib having an upper edge below said tension ring and a lower edge below said upper edge, the profile of each said rib increasing downward-inwardly to a minimum diameter immediately below said upper edge and then diminishing continuously downward-outwardly to said lower edge, the profile of said rib slanting continuously downwardly-outwardly from said minimum diameter to said lower edge, whereby when said cap is installed on a bottle neck, said ribs center said cap relative to said bottle neck and as said cap is pressed onto said neck said ribs slide over said bead and reduce frictional resistance to said cap sliding over said bead, a lower skirt below said tension ring and tear means to at least partially sever said lower skirt from the portion of said cap above the lower edge of said tension ring, said ribs being located on the inside of said lower skirt.