Claims
- 1. A tamper-indicating closure of integrally molded plastic construction, which comprises:
a base wall having a peripheral skirt with internal means for securing the closure to a container, a tamper-indicating band connected by frangible means to an edge of said skirt, and a stop flange extending axially toward said base wall and radially inwardly from an edge of said band remote from said skirt and at an angle axially toward said base wall, said stop flange comprising a circumferentially continuous base extending from said band to a free edge of said flange and being of constant cross section circumferentially entirely around said flange, said free edge being circumferentially continuous and lying in a plane parallel to said base wall, and a plurality of circumferentially spaced lugs integral with and extending axially along said base and radially inwardly from said base, said lugs radially thickening uniformly from zero thickness adjacent to said band to a maximum thickness at said free edge of said flange, each of said lugs being of constant cross section circumferentially of said flange.
- 2. The closure set forth in claim 1 wherein said lugs are of identical circumferential width.
- 3. The closure set forth in claim 2 wherein circumferential spacing between said lugs is uniform around said flange, and wherein said circumferential width of said lugs is less than said circumferential spacing between said lugs.
- 4. The closure set forth in claim 3 wherein said base of said stop flange has a constant thickness both circumferentially and radially.
- 5. The closure set forth in claim 4 wherein said maximum thickness of said lugs at said free edge of said flange is greater than the thickness of said base at said free edge.
- 6. The closure set forth in claim 3 wherein said base has a thickness that increases axially and radially of said flange.
- 7. The closure set forth in claim 6 wherein said maximum thickness of said lugs at said free edge of said flange is less than the thickness of said base at said free edge.
- 8. The closure set forth in claim 1 wherein said frangible means comprises a plurality of circumferentially spaced frangible bridges.
- 9. The closure set forth in claim 1 wherein said internal means comprises at least one internal thread, and where said closure further includes a plurality of ribs extending axially between reaches of said at least one thread for frictional engagement with external threads on a container finish.
- 10. The closure set forth in claim 9 wherein said at least one thread comprises a double thread and wherein said plurality of ribs comprises diametrically opposed ribs.
- 11. The closure set forth in claim 10 wherein said ribs have rounded circumferential edges.
- 12. The closure set forth in claim 11 wherein said ribs have a radial dimension that is less than that of said threads.
- 13. A tamper-indicating closure of integrally molded plastic construction, which comprises:
a base wall having a peripheral skirt with internal means for securing the closure to a container, a tamper-indicating band connected by frangible means to an edge of said skirt, and a stop flange extending radially inwardly from an edge of said band remote from said skirt and at an angle axially toward said base wall, said stop flange comprising a circumferentially continuous base extending from said band to a free edge of said flange and being of constant cross section circumferentially entirely around said flange, said base having a thickness that increases axially and radially of said flange, and a plurality of circumferentially spaced lugs integral with and extending axially along said base and radially inwardly from said base, each of said lugs being of constant cross section circumferentially of said flange, said lugs radially thickening uniformly from zero thickness adjacent to said band to a maximum thickness at said free edge of said flange and being of identical circumferential width, circumferential spacing between said lugs being uniform around said flange, and said circumferential width of said lugs being less than said circumferential spacing between said lugs.
- 14. The closure set forth in claim 13 wherein said free edge of said flange is circumferentially continuous and lies in a plane parallel to said base wall.
- 15. A method of forming a tamper-indicating closure for a container having a finish with at least one external thread and an external bead, said method comprising the steps of:
(a) forming a base wall having a peripheral skirt with at least one internal thread for engaging the external thread on the container finish, (b) forming a tamper-indicating band connected to an edge of said skirt by a plurality of circumferentially spaced integral frangible bridges, and (c) forming a stop flange extending at an angle radially individually and axially toward said base wall from an edge of said band remote from said skirt, said flange comprising a circumferentially continuous base extending from said band to a free edge of said flange and being of constant cross section circumferentially entirely around said flange, said free edge being circumferentially continuous and lying in a plane parallel to said base wall, and a plurality of circumferentially spaced lugs integral with and extending axially along said base and radially inwardly from said base, said lugs radially thickening uniformly from zero thickness adjacent to said band to a maximum thickness at a free edge of said flange.
- 16. The method set forth in claim 15 wherein said lugs are of identical circumferential width.
- 17. The method set forth in claim 16 wherein circumferential spacing between said lugs is uniform around said flange, and wherein said circumferential width of said lugs is less than said circumferential spacing between said lugs.
- 18. The method set forth in claim 17 wherein said base of said stop flange has a constant thickness both circumferentially and radially.
- 19. The method set forth in claim 18 wherein said maximum thickness of said lugs at said free edge of said flange is greater than the thickness of said base at said free edge.
- 20. The method set forth in claim 17 wherein said base has a thickness that increases axially and radially of said flange.
- 21. The method set forth in claim 15 wherein said closure further includes a plurality of ribs extending axially between reaches of said thread for frictional engagement with said external thread on said container finish.
- 22. The method set forth in claim 21 wherein said at least one internal thread comprises a double thread, and wherein said plurality of ribs comprises diametrically opposed ribs.
- 23. The method set forth in claim 22 wherein said ribs have rounded circumferential edges.
- 24. The method set forth in claim 23 wherein said ribs have a radial dimension that is less than that of said threads.
Parent Case Info
[0001] This application is a division of application Ser. No. 10/054,431 filed Jan. 22, 2002, which is a division of application Ser. No. 09/301,065 filed Apr. 28, 1999, now U.S. Pat. No. 6,382,443.
Divisions (2)
|
Number |
Date |
Country |
Parent |
10054431 |
Jan 2002 |
US |
Child |
10446411 |
May 2003 |
US |
Parent |
09301065 |
Apr 1999 |
US |
Child |
10054431 |
Jan 2002 |
US |