US5133471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stop devices for cap threads
Assignee: Obrist Closures Switzerland GmbH
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Filing: 1991-07-18
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Granted: 1992-07-28
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Expires: 2011-07-18
Abstract
Abstract The stop device for cap threads is preferably applicable to plastic caps which are coupled by screwing on the corresponding neck of a bottle containing liquids. The device consists of a thickening or projection (8) provided in the inner part of the cap (1), specifically in the intersection part between the side surface of said cap and the bottom of the same. When the cap (1) is screwed on the neck of the bottle this thickening (8) stops against the first thread (2') which the neck of the bottle has, constituting an obstacle resistant enough to prevent the cap (1) in its last screwing phase from continuing screwing on the neck.
Inventors
- 👤 Juan Pujol Almirall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:34
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/02; B65D41/04; B65D41/0471
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
187 words
An apparatus which impedes screwing beyond an extent of threading engagement, comprising: a cap threaded inside at a pitch that is threadably engageable with a pitch of an engaging thread on a bottle neck; means for sealing said cap to a mouth of a bottle as soon as said cap threadably engages said bottle neck by an extent of threadable engagement, said cap being manually screwable further onto said bottle neck beyond said extent; and means for impeding further screwing of said cap onto said bottle neck when screwing beyond said extent, said impeding means including a thickened portion projecting from said cap into a position where said thickened portion engages an increasing area of the thread on the bottle neck as said cap continues to be screwed beyond said extent so as to increase resistance against further turning of said cap on said bottle neck until reaching a resistance which prevents said cap from being manually turned any further and which prevents said cap from reaching a relative position on said bottle neck where said cap and bottle threads would be in a crossed thread state.
Claim 2
Independent Claim
187 words
An apparatus which impedes screwing beyond an extent of threading engagement, comprising: a cap threaded inside at a pitch that is threadably engageable with a pitch of an engaging thread on a bottle neck; means for sealing said cap to a mouth of a bottle as soon as said cap threadably engages said bottle neck by an extent of threadable engagement, said cap being manually screwable further onto said bottle neck beyond said extent; and means for impeding further screwing of said cap onto said bottle neck when screwing beyond said extent, said impeding means including a thickened portion projecting from said cap into a position where said thickened portion engages an increasing area of the thread on the bottle neck as said cap continues to be screwed beyond said extent so as to increase resistance against further turning of said cap on said bottle neck until reaching a resistance which prevents said cap from being manually turned any further and which prevents said cap from reaching a relative position on said bottle neck where said cap and bottle threads would be in a crossed thread state.
Claim 3
Dependent Claim
38 words
An apparatus as in claim 1, further comprising a sealing ring on said cap and a transverse rib on said bottle neck which sealingly engage each other as soon as said extent of said threadable engagement is reached.
Claim 4
Dependent Claim
20 words
An apparatus as in claim 2, wherein said sealing ring includes a ring-shaped tooth which engages with said transversal rib.
Claim 5
Dependent Claim
47 words
An apparatus as in claim 2, wherein said thickened portion extends about an inner circumference of said cap by an arc of approximately 75 degrees, said thickened portion having an inner radius which is less than half an outer diameter of the thread on the bottle neck.
Claim 6
Dependent Claim
79 words
An apparatus as in claim 2, where said cap includes base and skirt portions, said skirt portion extending from said base portion, said threads of said cap being on said skirt portion, said sealing means including a flange which projects from said base portion at a location radially inside of said skirt portion, said flange being against an inner circumference of a mouth of the bottle neck as said cap is screwed onto said bottle neck to said extent.
Claim 7
Dependent Claim
53 words
An apparatus as in claim 1, wherein said cap includes base and skirt portions, said skirt portion extending from said base portion, said threads of said cap being on said skirt portion, said sealing means including a flange which projects from said base portion at a location radially inside of said skirt portion.
Claim 8
Dependent Claim
17 words
An apparatus as in claim 6, wherein said thickening extends between said skirt portion and said flange.
Claim 9
Dependent Claim
25 words
An apparatus as in claim 1, wherein said thickened portion extends about an inner circumference of said cap by an arc of approximately 75 degrees.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-28 | 1996-01-27 | 1996-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-28 | 2000-01-27 | 2000-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-28 | 2004-01-27 | 2004-07-28 | $7700.00 | Window Closed / Lapsed |