US4496410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dimensionally recoverable articles
Assignee: Raychem Ltd
•
Filing: 1982-03-24
•
Granted: 1985-01-29
•
Expires: 2002-03-24
Abstract
Abstract First and second bodies of heat recoverable polymeric material are fusion bonded together with their directions of recovery at an angle to each other, the bond preferably being cross-linked after bonding to enable the resulting article better to withstand the recovery forces encountered in use. The invention is especially useful for making wraparound tubular enclosures for "T"'s and bends which enclosures in use will recover radially about two tubular axes.
Inventors
- 👤 Frederick J. Davis
- 👤 Donald G. Peacock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:59
CPC Classifications
B; B29; B29D; B29D23/00; B29D23/001; B29D23/003; B29D23/008; B29C; B29C65/00; B29C65/02; B29C66/00; B29C66/01; B29C66/03; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/114; B29C66/40; B29C66/47; B29C66/474; B29C66/50; B29C66/51; B29C66/53; B29C66/532; B29C66/5324; B29C66/53241; B29C66/53242; B29C66/53243; B29C66/70; B29C66/73; B29C66/737; B29C66/7371; B29C66/73711; B29C66/73712; H; H01; H01R; H01R4/00; H01R4/70; H01R4/72; B29C2793/00; B29C2793/0009; B29C2793/0018; B29C65/04; B29C65/08; B29C65/18; B29C66/4742; B29C66/47421; B29C66/71; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1331
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
138 words
A process for the production of a heat-recoverable article comprising at least two component parts having different directions of recovery, which process comprises (a) deforming a first body of fusion bondable polymeric material constituting one of the component parts at a temperature below the softening point of the material to render the material heat-recoverable, (b) forming a bond between one or more parts of the first body and a second body of fusion bondable polymeric material constituting another of the component parts which has been deformed at a temperature below the softening point of the material to render the material heat-recoverable, so that the direction of deformation of the first body is at an angle to the direction of deformation of the second body, and (c) cross-linking the bond between the deformed first body and the second body.
Claim 2
Dependent Claim
138 words
A process for the production of a heat-recoverable article comprising at least two component parts having different directions of recovery, which process comprises (a) deforming a first body of fusion bondable polymeric material constituting one of the component parts at a temperature below the softening point of the material to render the material heat-recoverable, (b) forming a bond between one or more parts of the first body and a second body of fusion bondable polymeric material constituting another of the component parts which has been deformed at a temperature below the softening point of the material to render the material heat-recoverable, so that the direction of deformation of the first body is at an angle to the direction of deformation of the second body, and (c) cross-linking the bond between the deformed first body and the second body.
Claim 3
Dependent Claim
16 words
A process according to claim 1 wherein the first and second bodies are seam bonded together.
Claim 4
Dependent Claim
18 words
A process according to claim 1 wherein the bonding is effected by fusion of the said polymeric material.
Claim 5
Dependent Claim
43 words
A process according to claim 1 or 2 wherein the bond-forming material includes further material in addition to the first body and the second body and the cross-linking cross-links the said further material with that of the first body and the second body.
Claim 6
Dependent Claim
25 words
A process according to claim 1, 2 or 3 wherein the cross-linking cross-links substantially all of the said polymeric material in addition to the bond.
Claim 7
Dependent Claim
20 words
A process according to claim 1, 2 or 3 wherein the cross-linking is effected after the deforming and bonding steps.
Claim 8
Dependent Claim
23 words
A process according to claim 1, 2 or 3 wherein the cross-linking is effected after the deforming step and during the bonding step.
Claim 9
Dependent Claim
19 words
A process according to claim 1, 2 or 3 wherein the cross-linking is effected by means of ionising radiation.
Claim 10
Dependent Claim
34 words
A process according to claim 1, 2 or 3 wherein the fusion bondable polymeric material before the cross-linking step has a gel content as measured by test method ANSI/ASTM D2765-68 of less than 5%.
Claim 11
Dependent Claim
23 words
A process according to claim 1 wherein the first body is a tube one end of which is bonded to a second body.
Claim 12
Dependent Claim
45 words
A process according to claim 10 wherein the tube is bonded to the second body which is a sheet and which carries closure means for closing opposable edges of the sheet together to form a tube lying at an angle to the first body tube.
Claim 13
Dependent Claim
73 words
A process according to claim 1 wherein the deforming step locally deforms at least one region of the first body, the second body is locally deformed in at least one region at a temperature below the softening point of the material to render it heat recoverable, and the first body is bonded to the second body with their respective deformed regions co-operating with each other to produce one or more hollow said article(s).
Claim 14
Dependent Claim
30 words
A process according to claim 12 wherein the deforming of the first body and/or of the second body is effected by vacuum forming of a web of the polymeric material.
Claim 15
Dependent Claim
26 words
A process according to claim 1, 2 or 3 wherein the bonding is effected so as to produce the configuration of a plurality of separable articles.
Claim 16
Dependent Claim
27 words
A process according to claim 1, 2 or 3 wherein the polymeric material after deformation has a wall thickness in the range from 0.1 to 5.0 millimeters.
Claim 17
Dependent Claim
17 words
A process according to claim 1, 2 or 3 wherein the resulting article is shaped and non-planar.
References Cited (Backward Citations)
GB990235A
Cited
GB1010064A
Cited
GB1116878A
Cited
US3455336A
Cited
US3434908A
Cited
US3490979A
Cited
GB1284082A
Cited
GB1286460A
Cited
GB1294665A
Cited
US3536822A
Cited
GB1357549A
Cited
US3982564A
Cited
US4275180A
Cited
US4422890A
Cited
US4342800A
Cited
US4345957A
Cited
US4366201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |