Patent US4363843A successfully refreshed from Google Patents.
US4363843A
Expired / Lapsed
US
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Seals
Assignee: Raychem Ltd
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Filing: 1980-03-11
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Granted: 1982-12-14
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Expires: 2000-03-11
Abstract
Abstract A recoverable seal for sealing a container, especially an artillery ordinance cannister, comprising a heat-shrinkable continuous annular band having a uniform coat of heat-activatable adhesive on the inwardly-facing surface thereof which has a mean thickness of 0.01 to 1.0 mm and differs from the mean thickness over the surface by at most 25% of the mean thickness. The band may be provided with a tearable region such as a score line to enable it easily to be peeled off the container. After the band has been recovered on the container, the band can be peeled away and a layer of adhesive will remain aiding the ability of the seal to withstand pressurization and depressurization.
Inventors
- 👤 David Crofts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:40
CPC Classifications
F; F42; F42B; F42B39/00; B; B29; B29C; B29C67/00; B29C67/0014; B29C67/0018; C; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/35; B29C2793/00; B29C2793/0054; B29K; B29K2995/00; B29K2995/0037; B29K2995/0049; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/14; Y10T428/1438; Y10T428/1462; Y10T428/15; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
110 words
A removable seal for a metallic substrate which comprises a heat-shrinkable continuous annular band having a tearable region therein and a uniform coat of heat-activatable adhesive on the inwardly facing surface thereof, which adhesive has a mean thickness in the range of from 0.01 to 1.0 mm, and differs in thickness from the mean thickness over the surface by not more than 25% of the mean thickness, and will adhere to a metallic substrate in preference to the band so that, after the band has been recovered onto a metallic substrate, the band can be peeled away from the substrate and a layer of adhesive will remain on the substrate.
Claim 2
Dependent Claim
110 words
A removable seal for a metallic substrate which comprises a heat-shrinkable continuous annular band having a tearable region therein and a uniform coat of heat-activatable adhesive on the inwardly facing surface thereof, which adhesive has a mean thickness in the range of from 0.01 to 1.0 mm, and differs in thickness from the mean thickness over the surface by not more than 25% of the mean thickness, and will adhere to a metallic substrate in preference to the band so that, after the band has been recovered onto a metallic substrate, the band can be peeled away from the substrate and a layer of adhesive will remain on the substrate.
Claim 3
Dependent Claim
29 words
A seal as claimed in claim 1 wherein the adhesive comprises a material selected from the group consisting of nitrile rubbers, a chloroprene rubber, a polyurethane rubber, and polybutylmethacrylate.
Claim 4
Dependent Claim
25 words
A seal as claimed in claim 1, wherein the mean thickness of the adhesive coat is in the range of from 0.025 to 0.5 mm.
Claim 5
Dependent Claim
15 words
A seal as claimed in claim 1, wherein said tearable region extends across said band.
Claim 6
Dependent Claim
21 words
A seal as claimed in claim 1, wherein the tearable region comprises a line of weaknesses that extends across the band.
Claim 7
Dependent Claim
101 words
A removable seal for an ordnance container to protect the ordnance against severe environmental conditions including pressurization and depressurization comprising: a continuous heat shrinkable annular band, said annular band having a tearable region therein and a uniform coat of heat activatable adhesive on the inner surface thereof so that at no point in the band does the adhesive thickness vary from the mean thickness by more than 25%, said mean thickness being in the range of 0.01 to 1.0 mm, and said adhesive being of the type which remains adhesive to the ordnance container after the band has been peeled away.
Claim 8
Dependent Claim
101 words
A removable seal for an ordnance container to protect the ordnance against severe environmental conditions including pressurization and depressurization comprising: a continuous heat shrinkable annular band, said annular band having a tearable region therein and a uniform coat of heat activatable adhesive on the inner surface thereof so that at no point in the band does the adhesive thickness vary from the mean thickness by more than 25%, said mean thickness being in the range of 0.01 to 1.0 mm, and said adhesive being of the type which remains adhesive to the ordnance container after the band has been peeled away.
Claim 9
Dependent Claim
29 words
A seal as claimed in the 6, wherein the adhesive comprises a material selected from the group consisting of nitrile rubbers, a chloroprene rubber, a polyurethane rubber, and polybutylmethacrylate.
Claim 10
Dependent Claim
25 words
A seal as claimed in claim 6, wherein the mean thickness of the adhesive coat is in the range of from 0.025 to 0.5 mm.
Claim 11
Dependent Claim
15 words
A seal as claimed in claim 6, wherein said tearable region extends across said band.
Claim 12
Dependent Claim
21 words
A seal as claimed in claim 6, wherein the tearable region comprises a line of weaknesses that extends across the band.
References Cited (Backward Citations)
US2027962A
Cited
US2790285A
Cited
GB990235A
Cited
US3483020A
Cited
GB1346479A
Cited
US3873018A
Cited
US4285746A
Cited
GB1474167A
Cited
GB1495028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |