EP0281284A2
Expired / Lapsed
EP
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Tamper-evident closures
Assignee: Nolato Jaycare Ltd
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Filing: 1988-02-19
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Granted: —
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Expires: 2008-02-19
Abstract
Abstract In a tamper-evident screw-threaded closure of the kind in which the skirt (2) of a cap is joined at its lower edge to a band (3) by integral elongated breakable webs (12), the webs are associated with co-operating teeth (11) and notches (8) that drive the band during the screwing-on step, the web extending from the root of the tooth to the adjacent wall of the notch in an inclined direction such as to flex or pivot and allow relative movement between the cap and band during this step without breaking, and the band has lugs (4) which oppose circumferential, rather than axial, movement in the unscrewing direction.
Inventors
- 👤 David Frank Young
- 👤 Michael John Wortley
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 13:23
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/32; B65D41/34; B65D41/3404; B65D41/3409; B65D41/3414
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
204 words
A tamper-evident closure for containers comprising a cap having a top wall and an internally screw-threaded depending skirt (2), the lower edge of the skirt being joined to an integral detachable tamper-evident band (3) by circumferentially spaced breakable elongated webs (12), and co-operating driving tooth surfaces (9,11) on the skirt and band which come into contact when the closure is screwed onto the neck of the co-operating container, characterised in that the driving surfaces are those of teeth (11) on the band or skirt projecting into notches (8) in the skirt or band and each web (12) extends in an inclined direction between the root of an associated one of the teeth (11) and the wall of the adjacent notch (8), the inclination being in such a direction that in the screwing-on step the web (12) can flex to allow that end of the associated tooth which is furthest from the web to be engaged by the adjacent wall of the notch (8), and in which furthermore the band (3) carries lugs (5) provided with substantially radially extending faces designed to co-operate with corresponding lugs on the neck of the container so as to oppose circumferential rotation of the band in an unscrewing direction.
Claim 2
Dependent Claim
204 words
A tamper-evident closure for containers comprising a cap having a top wall and an internally screw-threaded depending skirt (2), the lower edge of the skirt being joined to an integral detachable tamper-evident band (3) by circumferentially spaced breakable elongated webs (12), and co-operating driving tooth surfaces (9,11) on the skirt and band which come into contact when the closure is screwed onto the neck of the co-operating container, characterised in that the driving surfaces are those of teeth (11) on the band or skirt projecting into notches (8) in the skirt or band and each web (12) extends in an inclined direction between the root of an associated one of the teeth (11) and the wall of the adjacent notch (8), the inclination being in such a direction that in the screwing-on step the web (12) can flex to allow that end of the associated tooth which is furthest from the web to be engaged by the adjacent wall of the notch (8), and in which furthermore the band (3) carries lugs (5) provided with substantially radially extending faces designed to co-operate with corresponding lugs on the neck of the container so as to oppose circumferential rotation of the band in an unscrewing direction.
Claim 3
Dependent Claim
32 words
A closure according to claim 1 in which each web (12) is joined to a wall (10) of its associated notch (8) which is inclined to the edge of the skirt (2).
Claim 4
Dependent Claim
31 words
A closure according to claim 1 or claim 2 in which the end of the web (12) nearer to the wall of the notch (8) is thinner than the other end.
Claim 5
Dependent Claim
37 words
A closure according to any one of claims 1 to 3 in which each web (12) extends in a general direction inclined at substantially 45° to a line through it parallel to the axis of the cap.
Claim 6
Dependent Claim
49 words
A closure according to any one of claims 1 to 3 in which each tooth (11) is of rectangular profile and the associated notch (8) is square at that end (9) which engages the tooth during screwing-on but inclined at the other end where the web (12) is present.
References Cited (Backward Citations)
No citation records indexed.
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