Patent US2564388A successfully refreshed from Google Patents.
Patent US4500371A successfully refreshed from Google Patents.
US4500371A
Expired / Lapsed
US
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Heat-recoverable article
Assignee: NV RAYCHEM SA A Co OF BELGIUM
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Filing: 1984-02-14
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Granted: 1985-02-19
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Expires: 2004-02-14
Abstract
Abstract An article for forming a cable block or for enclosing a cable splice comprises a recoverable driver sleeve and a particulate heat-activatable adhesive temporarily restrained adjacent an inner surface of the sleeve.
Inventors
- 👤 Hubert De Groot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:32
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/08; H02G15/18; H02G15/1806; H02G15/1813; B; B29; B29C; B29C61/00; B29C61/06; B29C61/0608; B29C61/0666; B29C2061/0683; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10S428/00; Y10S428/91; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
41 words
An assembly for applying a heat-activatable adhesive to an elongate substrate, which comprises: a heat-recoverable driver sleeve; a particulate heat-activatable adhesive; and temporary restraining means for locating the adhesive adjacent an inner surface of the sleeve until heat-recovery of the sleeve.
Claim 2
Dependent Claim
41 words
An assembly for applying a heat-activatable adhesive to an elongate substrate, which comprises: a heat-recoverable driver sleeve; a particulate heat-activatable adhesive; and temporary restraining means for locating the adhesive adjacent an inner surface of the sleeve until heat-recovery of the sleeve.
Claim 3
Dependent Claim
43 words
An assembly according to claim 1, in which the sleeve has end regions of smaller cross-section and an intermediate region of larger cross-section, the particulate adhesive being located adjacent said intermediate region such that an internal passage through the assembly is substantially cylindrical.
Claim 4
Dependent Claim
18 words
An assembly according to claim 1, in which end regions of the sleeve are coated with an adhesive.
Claim 5
Dependent Claim
15 words
An assembly according to claim 1, in which the particulate adhesive is a hot-melt adhesive.
Claim 6
Dependent Claim
47 words
An assembly according to claim 1, in which the ratio between the cross-sectional area of the sleeve after recovery and the average cross-sectional area of particulate adhesive within it, taken over that length of the sleeve where the particulate adhesive is present, is from 2:1 to 3:1.
Claim 7
Dependent Claim
19 words
An assembly according to claim 1, in which the restraining means for locating the particulate adhesive is a net.
Claim 8
Dependent Claim
15 words
An assembly according to claim 6, in which the net is bonded to the sleeve.
Claim 9
Dependent Claim
15 words
An assembly according to claim 6, in which the net comprise a substantially non-cross-linked polyolefin.
Claim 10
Dependent Claim
21 words
An assembly according to claim 6, in which the net has a melting point below the recovery temperature of the sleeve.
Claim 11
Dependent Claim
24 words
An assembly according to claim 1, which additionally comprises a heat-resistant barrier which can surround the substrate inwardly of the sleeve and particulate adhesive.
Claim 12
Dependent Claim
15 words
An assembly according to claim 10, in which the barrier is a cross-linked polymeric net.
Claim 13
Dependent Claim
18 words
An assembly according to claim 10, in which the sleeve is substantially transparent and the barrier is coloured.
Claim 14
Dependent Claim
69 words
A method of producing a cable block, which comprises: surrounding a portion of the cable having a section thereof at least partially bare of jacket with an assembly according to claim 1; and heating the assembly to recover the sleeve and activate the adhesive, recovery causing the adhesive to be displaced from the temporary restraining means and driven into the core of the cable at the bared section thereof.
Claim 15
Dependent Claim
51 words
A method of sealing a cable splice, which comprises: surrounding a cable splice with an assembly according to claim 1; and heating the assembly to recover the sleeve and to activate the adhesive, recovery causing the adhesive to be displaced from the temporary restraining means and driven around the spliced conductors.
Claim 16
Dependent Claim
62 words
A method according to claim 14, in which on heating the following steps take place in sequence: (a) end portions of the sleeve recover into engagement with the cable jacket; (b) at least a part of the adhesive is activated; (c) the temporary restraining means becomes ineffective; and (d) the adhesive is displaced by recovery of a central portion of the sleeve.
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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |