US4200676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for joining heat-recoverable sheet material and resulting article
Assignee: Raychem Corp
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Filing: 1978-10-23
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Granted: 1980-04-29
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Expires: 1998-10-23
Abstract
Abstract The ends of heat-recoverable polymeric sheet material are joined by overlapping the ends and bonding them together by means of a laminar panel comprising a layer of a crosslinked hot-melt adhesive coated on one surface of a reinforced polymer layer. The panel has a width approximately that of the sheet material being joined. The panel is disposed, adhesive side down, so that approximately half of its adhesive coated surface contacts the sheet material on either side of the line defined by the uppermost of the overlapping ends. The panel is heated to activate the adhesive and form a secure bond joining the ends. Heat-recoverable sleeves can be made by joining the opposing ends of a single length of heat-recoverable sheet material.
Inventors
- 👤 Dennis A. Caponigro
- 👤 Eugene F. Lopez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:46
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29; B29C; B29C61/00; B29C61/003; B29C61/06; B29C61/10; B32B27/12; B32B37/00; B32B37/12; B32B7/00; B32B7/04; B32B7/12; C; C09; C09J; C09J5/00; C09J5/06; F; F16; F16L; F16L47/00; F16L47/02; F16L47/20; F16L47/22; F16L58/00; F16L58/18; F16L58/181; H; H02; H02G; H02G15/00; H02G15/08; H02G15/18; H02G15/1806; H02G15/1813; B29K; B29K2019/00; B29K2023/00; B29K2027/00; B29K2027/06; B29K2027/12; B29K2083/00; B29L; B29L2009/00; B32B2305/00; B32B2305/08; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1033; Y10T428/00; Y10T428/19; Y10T428/23
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
109 words
A method for joining the ends of heat recoverable sheet material comprising: (a) overlapping the ends of the sheet material; (b) disposing a laminar panel over the line defined by the uppermost of the overlapping ends, said panel comprising a layer of reinforced crosslinked polymer having a reinforcing member associated therewith and a layer of crosslinked adhesive composition coated on one surface of said reinforced polymer layer, said adhesive composition comprising a mixture of a normally adhesive heat softenable polymer and a tackifier; (c) heating said panel to render the adhesive tacky; (d) pressing the panel into close contact with the sheet material on either side of said line.
Claim 2
Independent Claim
109 words
A method for joining the ends of heat recoverable sheet material comprising: (a) overlapping the ends of the sheet material; (b) disposing a laminar panel over the line defined by the uppermost of the overlapping ends, said panel comprising a layer of reinforced crosslinked polymer having a reinforcing member associated therewith and a layer of crosslinked adhesive composition coated on one surface of said reinforced polymer layer, said adhesive composition comprising a mixture of a normally adhesive heat softenable polymer and a tackifier; (c) heating said panel to render the adhesive tacky; (d) pressing the panel into close contact with the sheet material on either side of said line.
Claim 3
Dependent Claim
18 words
A method according to claim 1 wherein said panel is substantially the same width as said sheet material.
Claim 4
Dependent Claim
21 words
A method according to claim 2 wherein said ends are the opposing ends of a single sheet of heat recoverable material.
Claim 5
Dependent Claim
23 words
A method according to claim 1 wherein said adhesive polymer is a copolymer of ethylene and at least 1 monoolefinically unsaturated polar comonomer.
Claim 6
Dependent Claim
38 words
A method according to claim 4 wherein the comonomer is selected from monoolefinically unsaturated acids, vinyl esters of alkanoic acids, vinyl esters of aromatic acids, alky esters of monoolefinically unsaturated acids and aryl esters of monoolefinically unsaturated acids.
Claim 7
Dependent Claim
15 words
A method according to claim 1 wherein the tackifier is a phenol modified coumarone-indene resin.
Claim 8
Dependent Claim
18 words
A method according to claim 6 wherein the adhesive polymer is a copolymer of ethylene and ethyl acrylate.
Claim 9
Dependent Claim
13 words
A method according to claim 7 wherein the crosslinking is by ionizing radiation.
Claim 10
Dependent Claim
19 words
A method according to claim 8 wherein the crosslinking is accomplished by from about 5-30 megarads of ionizing radiation.
Claim 11
Dependent Claim
13 words
A method according to claim 1 wherein said crosslinking is by ionizing radiation.
Claim 12
Dependent Claim
13 words
A method according to claim 1 wherein reinforcing member is a foraminous member.
Claim 13
Dependent Claim
14 words
A method according to claim 11 wherein the foraminous member is a woven cloth.
Claim 14
Dependent Claim
12 words
A method according to claim 12 wherein said cloth is glass cloth.
Claim 15
Dependent Claim
22 words
A method according to claim 1 wherein said reinforced polymer layer comprises a laminant of the reinforcing member between two polymer sublayers.
Claim 16
Dependent Claim
14 words
A method according to claim 14 wherein said reinforcing member is woven glass cloth.
Claim 17
Dependent Claim
13 words
A method according to claim 14 wherein said sublayers are layers of polyethylene.
Claim 18
Dependent Claim
41 words
A method according to claim 1 wherein said laminar panel is adhered to said sheet material by means of narrow bands of pressure sensitive tape along parallel edges of said laminar panel prior to heating the panel to render it tacky.
Claim 19
Dependent Claim
11 words
An article comprising the product of the method of claim 1.
Claim 20
Dependent Claim
11 words
An article comprising the product of the method of claim 2.
Claim 21
Dependent Claim
11 words
An article comprising the product of the method of claim 3.
Claim 22
Dependent Claim
11 words
An article comprising the product of the method of claim 4.
Claim 23
Dependent Claim
11 words
An article comprising the product of the method of claim 5.
Claim 24
Dependent Claim
11 words
An article comprising the product of the method of claim 6.
Claim 25
Dependent Claim
11 words
An article comprising the product of the method of claim 7.
Claim 26
Dependent Claim
11 words
An article comprising the product of the method of claim 8.
Claim 27
Dependent Claim
11 words
An article comprising the product of the method of claim 9.
Claim 28
Dependent Claim
11 words
An article comprising the product of the method of claim 10.
Claim 29
Dependent Claim
11 words
An article comprising the product of the method of claim 11.
Claim 30
Dependent Claim
11 words
An article comprising the product of the method of claim 12.
Claim 31
Dependent Claim
11 words
An article comprising the product of the method of claim 13.
Claim 32
Dependent Claim
11 words
An article comprising the product of the method of claim 14.
Claim 33
Dependent Claim
11 words
An article comprising the product of the method of claim 15.
Claim 34
Dependent Claim
11 words
An article comprising the product of the method of claim 16.
Claim 35
Dependent Claim
11 words
An article comprising the product of the method of claim 17.
References Cited (Backward Citations)
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US3991243A
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US3959052A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |