EP0052804A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Pilferproof cap
Assignee: Consumers Glass Co Ltd
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Filing: 1981-10-29
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Granted: —
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Expires: 2001-10-29
Abstract
Abstract A plastic screw-on closure adapted for use with containers has provision to indicate when the sealed container closure has been tampered with. The closure is made integrally.and has a cap. A band (6) for application over the shoulder of a container (4), means (8) for connecting the cap and band and drive means (10) for controlling relative rotation of the cap and band as the band is applied over a shoulder on a container. The drive means provides engagement between the cap and band during application of the closure, thereby ensuring the integrity of the connecting means during application of the closure. However, the drive means is ineffective during removal of the cap, such that the connecting means fractures due to axial separation of the cap and band.
Inventors
- 👤 Robert Melvin Chartier
- 👤 Jean Papineau Richard
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 13:47
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/32; B65D41/34; B65D41/3442; B65D41/3447; B65D41/3452
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
74 words
A ` plastic` cap with tamper indicating provision for twist application to a container, comprising a cap body portion, a band for application over a shoulder provided on a container, means for connecting the cap body portion and band, characterized in that means is provided for controlling relative rotation of the cap body portion and band to ensure integrity of said connecting means as the band is applied over a shoulder of a container.
Claim 2
Dependent Claim
74 words
A ` plastic` cap with tamper indicating provision for twist application to a container, comprising a cap body portion, a band for application over a shoulder provided on a container, means for connecting the cap body portion and band, characterized in that means is provided for controlling relative rotation of the cap body portion and band to ensure integrity of said connecting means as the band is applied over a shoulder of a container.
Claim 3
Dependent Claim
30 words
2 . A cap according to claim 1, characterized in that said connecting means comprises a plurality of bridges for connecting and axially spacing the cap body portion and band.
Claim 4
Dependent Claim
45 words
3 . A cap according to claim 1 or 2, characterized in that at least a number of said bridges break upon removal of the cap body portion such that the condition of the bridges indicate whether the container has been opened or tampered with.
Claim 5
Dependent Claim
43 words
A cap according to claims 1 to 3, characterized in that said control means is activated by said band which is spaced from said cap by said connecting means moving towards said cap body portion during application of said cap to a container.
Claim 6
Dependent Claim
47 words
A cap according to claim 2, characterized in that said control means comprises a number of drive members secured to said cap body portion and extending downwardly to engage said band after sufficient movement of said band towards said cap body portion during application of said closure.
Claim 7
Dependent Claim
47 words
A cap according to claim 2, characterized in that said control means comprises a number of drive members secured to said band and extending upwardly to engage said cap body portion after sufficient movement of said band towards said cap body portion during application of said closure.
Claim 8
Dependent Claim
89 words
A cap according to claim 5 or 6, characterized in that said bridges have an area of increased cross-section adjacent the junction point with said band, said drive members being paired with said bridges and positioned behind said bridges with respect to the rotational direction of application of the cap, such that during application of said cap, rotational movement of said band relative to said cap body portion is limited due to interengagement of a number of said drive members and the area of increased cross-section of lssociated bridges.
Claim 9
Dependent Claim
54 words
A cap according to Claim 7, characterized in that said bridges are tapered to define a weak area for fracture of each of said bridges during removal of said cap body portion from a container, said weak areas being protected by said drive members during application of said cap to preclude premature breaking thereof.
Claim 10
Dependent Claim
75 words
A cap according to claim 8, characterized in that the narrower portions of said bridges flex during application of said band over a container shoulder, the bridges in so flexing permitting movement of said band toward said cap to cause said drive members to engage the thicker portions of said bridges in controlling the degree of relative rotation between cap and band to protect the weaker thinner bridge portions during cap application to a container.
Claim 11
Dependent Claim
58 words
A Cap accordint to any one of the preceeding claims, chracterized in that the band comprises a sidewall portion, a ledge projecting inwardly from said sidewall portion for cooperating with a shoulder on a container and a bottom portion having an outwardly flared lower surface for camming said ledge over a container shoulder during application of the closure.
Claim 12
Dependent Claim
23 words
A cap according to claim 10 characterized in that the band comprises a sidewall portion, said sidewall portion circumferentially contacting a container shoulder.
Claim 13
Dependent Claim
29 words
A cap according to claim 10 or 11, characterized in that the band is sized to snuggly engage a shoulder provided on a container after application of the closure.
Claim 14
Dependent Claim
23 words
A cap according to claim 10 or 11, characterized in that said band is maintained on said container during removal of the cap.
Claim 15
Dependent Claim
31 words
A cap according to any one of the preceeding claims, characterized in that the cap material is selected from the group of plastic materials consisting of polyethylene, polypropylene and copolymers thereof.
References Cited (Backward Citations)
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