US4114775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cap with sealing liner
Assignee: Nippon Closures Co Ltd
•
Filing: 1977-03-03
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Granted: 1978-09-19
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Expires: 1997-03-03
Abstract
Abstract A cap includes a metallic cap shell having a circular top and a skirt extending downwardly from the peripheral edge of the top and provided with a thread-forming portion deformable along the thread of the opening part of a container, and a flexible liner provided inwardly of the top of the cap shell. The liner includes an annular protrusion having an inside diameter substantially equal to, or slightly larger than, the outside diameter of the sealing surface of the opening of a container to be sealed and comprising a perpendicular inside wall adapted to seal intimately with the peripheral sealing surface of the container opening and an upright outside wall spaced apart from the inner circumferential surface of the skirt.
Inventors
- 👤 Tokujiro Shinozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:40
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/32; B65D41/34; B65D41/348; B65D41/02; B65D41/04; B65D41/0435; B65D41/0464; Y; Y10; Y10S; Y10S206/00; Y10S206/807
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
337 words
A cap for use in sealing a container of the type including an opening portion having therein an opening surrounded by a sealing surface including an upper rim and inner and outer peripheral surfaces, with an exterior thread provided below the sealing surface, said cap comprising: a metallic cap shell having a circular top and a skirt extending downwardly from the peripheral edge of said top, said skirt having a thread forming portion which is deformable along the exterior thread of a container on which the cap is to be used; and a flexible liner provided inwardly of said top of said cap shell, said liner comprising: an outer annular protrusion extending downwardly from said top, said outer annular protrusion having an inner diameter substantially equal to, or slightly larger than, the outer diameter of the sealing surface of the container on which the cap is to be used, said outer annular protrusion having a radially inner wall extending substantially perpendicular to said top, said inner wall of said outer annular protrusion forming means for intimately sealing against the outer peripheral surface of the container on which the cap is to be used, said outer annular protrusion having an upright radially outer wall which is spaced radially inwardly from the inner circumferential surface of said skirt; and an inner annular protrusion extending downwardly from said top at a position radially inwardly of said outer annular protrusion, said inner annular protrusion having a substantially triangular cross-sectional configuration, said inner annular protrusion having an inner diameter substantially equal to, or slightly smaller than, the inner diameter of the sealing surface of the container on which the cap is to be used, said inner annular protrusion including inner and outer walls which converge downwardly at an apex angle of 30° to 50°, said outer wall being inclined upwardly and radially outwardly and forming means for abutting against the inner circumferential edge of the upper rim of the sealing surface of the container on which the cap is to be used.
Claim 2
Dependent Claim
337 words
A cap for use in sealing a container of the type including an opening portion having therein an opening surrounded by a sealing surface including an upper rim and inner and outer peripheral surfaces, with an exterior thread provided below the sealing surface, said cap comprising: a metallic cap shell having a circular top and a skirt extending downwardly from the peripheral edge of said top, said skirt having a thread forming portion which is deformable along the exterior thread of a container on which the cap is to be used; and a flexible liner provided inwardly of said top of said cap shell, said liner comprising: an outer annular protrusion extending downwardly from said top, said outer annular protrusion having an inner diameter substantially equal to, or slightly larger than, the outer diameter of the sealing surface of the container on which the cap is to be used, said outer annular protrusion having a radially inner wall extending substantially perpendicular to said top, said inner wall of said outer annular protrusion forming means for intimately sealing against the outer peripheral surface of the container on which the cap is to be used, said outer annular protrusion having an upright radially outer wall which is spaced radially inwardly from the inner circumferential surface of said skirt; and an inner annular protrusion extending downwardly from said top at a position radially inwardly of said outer annular protrusion, said inner annular protrusion having a substantially triangular cross-sectional configuration, said inner annular protrusion having an inner diameter substantially equal to, or slightly smaller than, the inner diameter of the sealing surface of the container on which the cap is to be used, said inner annular protrusion including inner and outer walls which converge downwardly at an apex angle of 30° to 50°, said outer wall being inclined upwardly and radially outwardly and forming means for abutting against the inner circumferential edge of the upper rim of the sealing surface of the container on which the cap is to be used.
Claim 3
Dependent Claim
15 words
A cap as claimed in claim 1, wherein said cap shell has a deformable shoulder.
Claim 4
Dependent Claim
14 words
A cap as claimed in claim 1, wherein said liner is made of polyethylene.
Claim 5
Dependent Claim
80 words
A cap as claimed in claim 1, wherein said inner diameter (d 1 ) of said outer annular protrusion is within the range shown by the expression: D.sub.1 ' - α.sub.1 ≦ d.sub.1 (mm) ≦ D.sub.1 ' + α.sub.1 + 0.7 wherein D 1 ' is the standard target outer diameter (mm) of the sealing surface of the container on which the cap is to be used, and α 1 is the maximum manufacturing tolerance (mm) of D 1 '.
Claim 6
Dependent Claim
77 words
A cap as claimed in claim 1, wherein said inner diameter (d 1 ) of said outer annular protrusion is within the range shown by the expression: D.sub.1 ' - α.sub.1 ≦ d.sub.1 ≦ D.sub.1 ' + α.sub.1 wherein D 1 ' is the standard target outer diameter (mm) of the sealing surface of the container on which the cap is to be used, and α 1 is the maximum manufacturing tolerance (mm) of D 1 '.
Claim 7
Dependent Claim
14 words
A cap as claimed in claim 1, wherein said apex angle is approximately 45°.
Claim 8
Dependent Claim
80 words
A cap as claimed in claim 1, wherein said inner diameter (d 2 ) of said inner annular protrusion is within the range shown by the expression: D.sub.2 ' - α.sub.2 - 0.6 ≦ d.sub.2 (mm) ≦ D.sub.2 ' - α.sub.2 wherein D 2 ' is the standard target outer diameter (mm) of the sealing surface of the container on which the cap is to be used, and α 2 is the maximum manufacturing tolerance (mm) of D 2 '.
Claim 9
Dependent Claim
79 words
A cap as claimed in claim 1, wherein said inner diameter (d 2 ) of said inner annular protrusion is within the range shown by the expression: D.sub.2 ' - α.sub.2 - 0.3 ≦ d.sub.2 ≦ D.sub.2 ' - α.sub.2 wherein D 2 ' is the standard target outer diameter (mm) of the sealing surface of the container on which the cap is to be used, and α 2 is the maximum manufacturing tolerance (mm) of D 2 '.
Claim 10
Dependent Claim
19 words
A cap as claimed in claim 1, wherein said outer and inner annular protrusions have substantially the same heights.
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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |