Plastic cap and container construction
First Claim
1. A cap having a central top disk, a thin-walled substantially cylindrical outer skirt of substantially uniform thickness depending from the periphery of said disk, said outer skirt being scored and weakened in a circumferential first line spaced downwardly from the top of said outer skirt and in a spiral second line joining said first line and extending down to the bottom edge of said outer skirt, a tab attached to the bottom edge of said outer skirt adjacent said second line, an upper internal circumferential bead on said outer skirt between said first line and said disk, a lower internal second bead on said outer skirt below but adjacent said first line, said second bead being interrupted in a series of gaps spaced around the circumference of said outer skirt, a thickening of said outer skirt immediately paralleling and on one side of said second line, a second thickening of said outer skirt immediately paralleling said second line and on the side of said second line opposite said first-mentioned thickening, an externally projecting finger hold on said outer skirt positioned immediately above the intersection of said first and second lines.
12 Assignments
0 Petitions
Accused Products
Abstract
A plastic container neck has an inside substantially vertical sealing surface, a top groove, a very smooth second sealing surface of less diameter than the first sealing surface, a lower groove and a vertical stretch. The outside of the neck has a vertical surface, a horizontal, inwardly-extending shoulder, an indented second vertical surface of lesser diameter than the first vertical surface and an external bead, and a third vertical surface. The container has a substantially uniform wall thickness. The second sealing surface has an "injection finish" obtained by use of a blow pin in the mold. The cap has lower internal beads interrupted in a plurality of gaps, permitting stretching of the cap to seat on the neck. Thickenings on the interior of the cap outer skirt paralleling the spiral groove of the skirt from the bottom edge of the skirt to the horizontal groove to facilitate tearing the skirt.
33 Citations
5 Claims
- 1. A cap having a central top disk, a thin-walled substantially cylindrical outer skirt of substantially uniform thickness depending from the periphery of said disk, said outer skirt being scored and weakened in a circumferential first line spaced downwardly from the top of said outer skirt and in a spiral second line joining said first line and extending down to the bottom edge of said outer skirt, a tab attached to the bottom edge of said outer skirt adjacent said second line, an upper internal circumferential bead on said outer skirt between said first line and said disk, a lower internal second bead on said outer skirt below but adjacent said first line, said second bead being interrupted in a series of gaps spaced around the circumference of said outer skirt, a thickening of said outer skirt immediately paralleling and on one side of said second line, a second thickening of said outer skirt immediately paralleling said second line and on the side of said second line opposite said first-mentioned thickening, an externally projecting finger hold on said outer skirt positioned immediately above the intersection of said first and second lines.
Specification