Tamper-indicating closure and package
View Patent ↗A tamper-indicating closure that includes a base wall having a cylindrical skirt for removably engaging a container finish. A tamper band is frangibly connected to the skirt, and a plurality of wings extend inwardly from an inner surface of the tamper band for engagement with a container finish. The wings are resiliently flexibly connected to the inner surface of the band along lines that are disposed at a counterclockwise angle with respect to the axis of the skirt as viewed from inside the skirt.
1. A tamper-indicating closure that includes:
a base wall having a cylindrical skirt for removably engaging a container finish,
a tamper band frangibly connected to said skirt, and
a plurality of wings extending inwardly from an inner surface of said tamper band for engaging a container finish,
said wings being flexibly resiliently connected to said inner surface of said band along lines that are disposed at a counterclockwise angle with respect to an axis of said skirt as viewed from inside said skirt.
2. The closure set forth in claim 1 wherein said tamper band includes a portion stepped radially outwardly with respect to said skirt and being contiguously connected to said skirt by an interconnecting wall portion, and wherein said wings are integrally connected to said interconnecting wall portion whereby stiffness of said wings to flexure with respect to said band is greater adjacent to said interconnecting wall portion than remote from said interconnecting wall portion.
3. The closure set forth in claim 1 wherein said angle is in the range of greater than 0° to 35°.
4. The closure set forth in claim 1 wherein said wings have a flat edge facing said base wall at an angle of 25° to 45° with respect to said base wall.
5. The closure set forth in claim 4 wherein said angle is 35°.
6. The closure set forth in claim 1 wherein each of said wings has a thickness in the range of 0.024 to 0.03 inch.
7. A tamper-indicating package that includes:
a container having a finish with at least one external thread segment and a plurality of external ratchet teeth spaced from said thread segment, and
a tamper-indicating closure that includes:
a base wall having a skirt with at least one internal thread segment for engaging said external thread segment on said finish,
a tamper band frangibly connected to said skirt, and
a plurality of wings extending inwardly from an inner surface of said tamper band for engagement with said ratchet teeth on said finish,
said wings being resiliently flexibly connected to said inner surface of said band along lines that are disposed at a counterclockwise angle with respect to an axis of said skirt as viewed from inside said skirt.
8. The package set forth in claim 7 wherein angular spacing between said wings is less than angular spacing between said ratchet teeth.
9. The closure set forth in claim 8 wherein said angular spacing between said wings is one-half of said angular spacing between said ratchet teeth.
10. The package set forth in claim 7 wherein said ratchet teeth are disposed in two diametrically opposed groups.
11. The package set forth in claim 10 wherein at least some of said ratchet teeth have an abutment face at an acute angle to a diameter of said finish.
12. The package set forth in claim 7 wherein said tamper band includes a portion stepped radially outwardly with respect to said skirt and being contiguously connected to said skirt by an interconnecting wall portion, and wherein said wings are integrally connected to said interconnecting wall portion such that stiffness of said wings to flexure with respect to said band is greater adjacent to said interconnecting wall portion than remote from said interconnecting wall portion.