Patent US3770556A successfully refreshed from Google Patents.
US3770556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wraparound closure sleeve
Assignee: REYCHEM CORP
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Filing: 1970-08-07
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Granted: 1973-11-06
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Expires: 1990-08-07
Abstract
Abstract A heat recoverable sleeve is disclosed which is capable of being installed on a longitudinal member without access to a free end. The sleeve comprises a flexible sheet of heat recoverable material having edges which may be overlapped and which have been coated with a contact adhesive. Chloroprene based contact adhesives are disclosed. The coated sheet is wrapped about the longitudinal member and the edges of the sheet are caused to adhere together by the contact cement. In order to prevent the overlapping edge from peeling back during recovery and opening the joint, a restraining member such as a sheet of metallic foil may be adhered to the overlapping edge and the region of the sleeve adjoining the underlapping edge. Alternatively, peeling back may be prevented by cross-linking the overlapping edge. Heating of the sleeve causes it to shrink onto the longitudinal member to form a secure closure.
Inventors
- 👤 J Evans
- 👤 G Will
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:18
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; B; B29; B29C; B29C61/00; B29C61/06; B29C61/10; F; F16; F16L; F16L47/00; F16L47/20; F16L47/22; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1054; F16L58/1063; F16L58/18; F16L58/181; F16L59/00; F16L59/10; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1033; Y10T156/1034; Y10T156/1036; Y10T156/1038; Y10T428/00; Y10T428/24; Y10T428/24777; Y10T428/24793
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
13 words
The member of claim 1, wherein said contact adhesive is a rubber cement.
Claim 2
Dependent Claim
14 words
The member of claim 2, wherein said rubber cement is a neoprene rubber cement.
Claim 3
Dependent Claim
28 words
The member of claim 3, wherein said neoprene rubber cement is selected from the group consisting of neoprene AC, neoprene AD, neoprene ILA and neoprene AF rubber cements.
Claim 4
Dependent Claim
39 words
The member of claim 3, wherein said rubber cements contain from 20 to 45 parts per 100 parts of polymer of a tackifying resin and between 9 and 12 parts per 100 parts of polymer of a metal oxide.
Claim 5
Dependent Claim
39 words
The member of claim 3 wherein said rubber cement contains from 5 to 55 parts per 100 parts of polymer of a tackifying resin and between 5 to 15 parts per 100 parts of polymer of a metal oxide.
Claim 6
Dependent Claim
13 words
The number of claim 6, wherein said tackifying resin is tertiary-butyl phenolic resin.
Claim 7
Dependent Claim
23 words
The member of claim 6, wherein said metal oxide is selected from the group consisting of magnesium, lead (11), lithium and zinc oxides.
Claim 8
Dependent Claim
17 words
The member of claim 6, wherein said metal oxide is a mixture of zinc and magnesium oxides.
Claim 9
Dependent Claim
37 words
The member of claim 1, wherein said means to prevent peeling back comprises a cross-linked area of said piece of material adjacent a second margin thereof, said area being sufficiently cross-linked to prevent any substantial recovery thereof.
Claim 10
Dependent Claim
13 words
The member of claim 10, wherein said cross-linked area is formed by irradiation.
Claim 11
Dependent Claim
27 words
The member of claim 10, wherein circumferential slits are formed in said second margin to compensate for expansion of said cross-linked area during recovery of said member.
Claim 12
Dependent Claim
96 words
A heat recoverable closure member comprising: a sheet of heat recoverable material; a first area of contact adhesive on the outer surface of said material near one margin thereof; a second area of contact adhesive on the inner surface of said material near the second margin thereof, said contact adhesive being capable of withstanding the shearing force exerted when said heat recoverable material is wrapped around an object and heated to an extent sufficient to cause said material to recover; and means to prevent peeling back of said second margin during heat recovery of said member.
Claim 13
Dependent Claim
40 words
The member of claim 13, wherein said means to prevent a peeling back comprises a sheet of metal foil adhered to said second margin and to an outer surface of said member prior to the heat recovery of said member.
Claim 14
Dependent Claim
23 words
The member of claim 13, wherein said means to prevent a peeling back comprises a second margin which is tapered toward its edge.
Claim 15
Dependent Claim
38 words
The member of claim 13, wherein said means to prevent a peeling back comprises a fabric tape adhered to said second margin and to an outer surface of said member prior to the heat recovery of said member.
Claim 16
Dependent Claim
41 words
The member of claim 13, wherein said means to prevent a peeling back comprises a sheet of heat recoverable material adhered to said second margin and to an outer surface of said member prior to the heat recovery of said member.
Claim 17
Dependent Claim
98 words
A heat recoverable closure member comprising: a first heat recoverable member having an area of contact adhesive; a second heat recoverable member having an area of contact adhesive being capable of being brought into contact with the area on said first member to form an adhesive bond, said contact adhesive being capable of withstanding the shearing force exerted when said members are joined around an object and heated to an extent sufficient to cause said member to recover; and means to prevent a peeling back of either of said members from the other uPon recovery of said members.
Claim 18
Dependent Claim
21 words
The closure member of claim 18, wherein both of said portions are part of a single piece of heat recoverable material.
Claim 19
Dependent Claim
107 words
A heat recoverable member capable of forming a closure over a longitudinal member without the necessity of access to a free end of said member comprising: a flexible sheet of heat recoverable ethylene based polymer; a first layer of neoprene based contact adhesive on an upper surface of said sheet near one margin; a second layer of neoprene based contact adhesive on a lower surface of said sheet positioned on said lower surface at a location directly opposite the first layer when said sheet is wrapped around said longitudinal member; and means to prevent a peeling back of said member during the heat recovery of said member.
Claim 20
Dependent Claim
52 words
The member of claim 1, wherein said means to prevent peeling back comprises a cross-linked area of said piece of material adjacent a margin thereof, the extent of said cross-linking at said margin being sufficient to prevent any substantial recovery thereof, the degree of cross-linking decreasing with increasing distance from said margin.
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |