US3601273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilferproof closure with vertical weakening lines
Assignee: Alcoa Corp
•
Filing: 1969-01-31
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Granted: 1971-08-24
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Expires: 1989-01-31
Abstract
Abstract The subject matter relates to a pilferproof closure for a container in which the closure is threadedly engaged with the thread of the neck of the container and is of the type which includes a locking band at its lower end having its lower edge turned under a shoulder on the container neck, with the locking band being separated from the main body of the closure by a circumferential line of lancing and spaced bridges, with the bridges being the sole means of attachment of the band to the main body of the closure. The locking band is provided with several circumferentially spaced vertical weakening lines, preferably four equally spaced, which rupture on unscrewing of the closure to produce outwardly flared sectors in said locking band, whereby the entire closure, including the locking band, is completely removable from the container neck. The bridges do not fracture for the most part, but instead function to provide bend lines for the outwardly flared sectors.
Inventors
- 👤 Howard R Kutcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:16
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/32; B65D41/34; B65D41/348; B65D2401/00; B65D2401/15; B65D2401/30; B65D2401/35; B65D2401/40
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
154 words
A pilferproof closure for containers having a threaded neck and a locking shoulder, said closure being of the type having a shell formed of thin ductile metal providing a top and a depending skirt, said skirt being formed of an upper threadbearing part, for engagement with the threads of the container, and a lower locking band part, said parts being separated from each other by a peripheral line of interrupted slits forming lances and bridges, with said locking band adapted to be turned under the shoulder on the container for locking therewith, said band having several spaced vertical lines of weakening formed therein which rupture or spread on removal of said closure To divide the locking band into segments between the ruptured vertical lines, which segments bend on the line of the bridges and are flared outwardly by the camming action of the locking shoulder of the container on removal of the entire closure.
Claim 2
Dependent Claim
154 words
A pilferproof closure for containers having a threaded neck and a locking shoulder, said closure being of the type having a shell formed of thin ductile metal providing a top and a depending skirt, said skirt being formed of an upper threadbearing part, for engagement with the threads of the container, and a lower locking band part, said parts being separated from each other by a peripheral line of interrupted slits forming lances and bridges, with said locking band adapted to be turned under the shoulder on the container for locking therewith, said band having several spaced vertical lines of weakening formed therein which rupture or spread on removal of said closure To divide the locking band into segments between the ruptured vertical lines, which segments bend on the line of the bridges and are flared outwardly by the camming action of the locking shoulder of the container on removal of the entire closure.
Claim 3
Dependent Claim
23 words
A pilferproof closure as defined in claim 1, wherein said several spaced vertical lines of weakening are equally spaced about the locking band.
Claim 4
Dependent Claim
47 words
A pilferproof closure as defined in claim 1, wherein at least four vertical lines of weakening are formed in said locking band and are substantially equally spaced circumferentially about said band to provide at least four outwardly flared segments in said band on removal of said closure.
Claim 5
Dependent Claim
35 words
A pilferproof closure as defined in claim 1, wherein some of said bridges are wider than others to insure that the locking band does not separate from the closure skirt during removal of the closure.
Claim 6
Dependent Claim
38 words
A pilferproof closure as defined in claim 1, wherein said bridges are formed of alternating narrow and wide bridges to insure that the locking band does not completely separate from the closure skirt during removal of the closure.
Claim 7
Dependent Claim
53 words
A pilferproof closure as defined in claim 1, wherein the shell is formed from a sheet of an aluminum base alloy in an extra hard temper having a metal thickness between 0.008 and 0.0095 inch and wherein said vertical weakening lines in said locking band have a residual thickness of approximately 0.004 inch.
Claim 8
Dependent Claim
35 words
A pilferproof closure as defined in claim 6, wherein said bridges include some bridges wider than others to insure that the locking band does not become detached from the skirt on removal of the closure.
Claim 9
Dependent Claim
19 words
A pilferproof closure as defined in claim 7, wherein said bridges are formed of alternating narrow and wide bridges.
Claim 10
Dependent Claim
28 words
A pilferproof closure as defined in claim 8, wherein the narrow bridges are approximately 0.020 inch in width and the wide bridges are approximately 0.050 inch in width.
Claim 11
Dependent Claim
19 words
A pilferproof closure as defined in claim 9, wherein sixteen lances and sixteen bridges are formed in said closure.
Claim 12
Dependent Claim
30 words
A pilferproof closure as defined in claim 10, wherein at least four vertical lines of weakening are formed in said locking band, said lines being equally spaced around said band.
Claim 13
Dependent Claim
25 words
A pilferproof closure as defined in claim 11, in which said vertical lines of weakening comprise scores formed on the internal surface of the band.
References Cited (Backward Citations)
US3464576A
Cited
US3465907A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |