Patent US4685453A successfully refreshed from Google Patents.
US4685453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoformable element and use thereof
Assignee: Individual
•
Filing: 1985-05-14
•
Granted: 1987-08-11
•
Expires: 2005-05-14
Abstract
Abstract The thermoformable element comprises a strip (1) formed from two layers of foam (2, 3) of a thermoplastic polymer. The layers are welded to one another along their longitudinal edges so as to form a space between them in the shape of a channel (4). The inlet for the channel can be controlled by a non-return valve (6) whereas the exit can comprise a plug (7). The element is thermoformed by circulating a fluid heated to 130° to 140° C. through the channel until the foam becomes soft.
Inventors
- 👤 Claude Guignard
- 👤 Tony Giglio
- 👤 Abdelkader Benmiloud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:55
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/04; A61L; A61L15/00; A61L15/07; B; B29; B29C; B29C35/00; B29C35/02; B29C35/0272; B29C35/04; B29C53/00; B29C53/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24744
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
102 words
A Thermoformable element comprising two adjacent layers of polymers one of which at least comprises elastically compressible foam, and at least one layer is made of a thermoplastic polymer, which two layers are united at the edges of the layers so as to define between the layers an enclosed space, and in which at least two openings are provided for connecting the said space to the exterior of the elements, one of which openings comprises an inlet for a fluid for heating the said thermoplastic polymer to its thermoforming temperature and the other of which openings comprises an outlet for this fluid.
Claim 2
Dependent Claim
102 words
A Thermoformable element comprising two adjacent layers of polymers one of which at least comprises elastically compressible foam, and at least one layer is made of a thermoplastic polymer, which two layers are united at the edges of the layers so as to define between the layers an enclosed space, and in which at least two openings are provided for connecting the said space to the exterior of the elements, one of which openings comprises an inlet for a fluid for heating the said thermoplastic polymer to its thermoforming temperature and the other of which openings comprises an outlet for this fluid.
Claim 3
Dependent Claim
19 words
An element according to claim 1, characterised in that both said layers are made of a thermoplastic polymer foam.
Claim 4
Dependent Claim
26 words
An element according to claim 1, characterised in that one of the said layers is made of a thermoplastic material which is rigid at room temperature.
Claim 5
Dependent Claim
22 words
An element according to claim 1, further including a non-return valve and a plug respectively controlling the said inlet and outlet openings.
Claim 6
Dependent Claim
20 words
An outlet according to claim 1, characterised in that the said edges are secured to one another by heat welding.
Claim 7
Dependent Claim
20 words
An element according to claim 1, further including an impervious film associated with the adjacent faces of the said layers.
Claim 8
Dependent Claim
24 words
An element according to claim 1, characterised in that it is made in the form of a strip formed from two longitudinally welded layers.
Claim 9
Dependent Claim
19 words
An element according to claim 1, characterised in that one of the outer faces of the element is self-adhesive.
Claim 10
Dependent Claim
21 words
An element according to claim 1, characterised in that one of the said layers is made of an elastically extensible material.
Claim 11
Dependent Claim
24 words
An element according to claim 1, characterised in that the cross section of the inlet opening is greater than that of the outlet opening.
Claim 12
Dependent Claim
43 words
An element according to claim 1, characterised in that one of the faces forming the said enclosed space is provided with irrigation channels beginning at the inlet openign and distributed evenly across the surface on which the heating fluid is to be distributed.
Claim 13
Dependent Claim
97 words
A thermoformable element comprising two adjacent layers of polymers one of which at least comprises elastically compressible foam, and at least one layer is made of a thermoplastic polymer, characterised in that the edges of the layers define between them an enclosed space connected to the outside by at least two openings one of which comprises an inlet for a fluid for heating the said thermoplastic polymer to its thermoforming temperature and the other of which comprises an outlet for this fluid, wherein said inlet and outlet openings are controlled respectively by a non-return valve and plug.
Claim 14
Dependent Claim
97 words
A thermoformable element comprising two adjacent layers of polymers one of which at least comprises elastically compressible foam, and at least one layer is made of a thermoplastic polymer, characterised in that the edges of the layers define between them an enclosed space connected to the outside by at least two openings one of which comprises an inlet for a fluid for heating the said thermoplastic polymer to its thermoforming temperature and the other of which comprises an outlet for this fluid, wherein said inlet and outlet openings are controlled respectively by a non-return valve and plug.
Claim 15
Dependent Claim
97 words
A thermoformable element comprising two adjacent layers of polymers one of which at least comprises elastically compressible foam, and at least one layer is made of a thermoplastic polymer, characterised in that the edges of the layers define between them an enclosed space connected to the outside by at least two openings one of which comprises an inlet for a fluid for heating the said thermoplastic polymer to its thermoforming temperature and the other of which comprises an outlet for this fluid, wherein the cross-section of the inlet opening is greater than that of the outlet opening.
Claim 16
Dependent Claim
97 words
A thermoformable element comprising two adjacent layers of polymers one of which at least comprises elastically compressible foam, and at least one layer is made of a thermoplastic polymer, characterised in that the edges of the layers define between them an enclosed space connected to the outside by at least two openings one of which comprises an inlet for a fluid for heating the said thermoplastic polymer to its thermoforming temperature and the other of which comprises an outlet for this fluid, wherein the cross-section of the inlet opening is greater than that of the outlet opening.
Claim 17
Dependent Claim
135 words
A thermoformable element comprising two layers of polymers adjacent face to face and having complementary outlines one of which at least comprises elastically compressible foam, and at least one layer is made of a thermoplastic polymer, in which two layers are sealed along said outlines so as to define between them a sealed slot, and in which at least two spaced openings are provided for connecting the said slot to the exterior of the elements, one of which openings comprises an inlet for a pressurized fluid the pressure of which being such that it moves apart said layers from one another to form an air-tight space between said layers and the other of said openings comprises an outlet for this fluid, which is a fluid for heating the said thermoplastic polymer to its thermoforming temperature.
Claim 18
Dependent Claim
135 words
A thermoformable element comprising two layers of polymers adjacent face to face and having complementary outlines one of which at least comprises elastically compressible foam, and at least one layer is made of a thermoplastic polymer, in which two layers are sealed along said outlines so as to define between them a sealed slot, and in which at least two spaced openings are provided for connecting the said slot to the exterior of the elements, one of which openings comprises an inlet for a pressurized fluid the pressure of which being such that it moves apart said layers from one another to form an air-tight space between said layers and the other of said openings comprises an outlet for this fluid, which is a fluid for heating the said thermoplastic polymer to its thermoforming temperature.
Claim 19
Dependent Claim
114 words
A thermoformable element comprising first and second layer means for containing a fluid, said layer means being sealably affixed one to the other at the periphery thereof so as to define a single sealed space therebetween; inlet means for allowing said fluid to pass from outside said layers to said space between the layers; and outlet means for allowing said fluid to pass from within said space to the outside, wherein said first layer means is a thermoplastic polymer and said second layer means is an elastically compressible foam and wherein said fluid may be passed through said space within the element so as to heat said thermoplastic polymer layer to its thermoformable temperature.
Claim 20
Dependent Claim
114 words
A thermoformable element comprising first and second layer means for containing a fluid, said layer means being sealably affixed one to the other at the periphery thereof so as to define a single sealed space therebetween; inlet means for allowing said fluid to pass from outside said layers to said space between the layers; and outlet means for allowing said fluid to pass from within said space to the outside, wherein said first layer means is a thermoplastic polymer and said second layer means is an elastically compressible foam and wherein said fluid may be passed through said space within the element so as to heat said thermoplastic polymer layer to its thermoformable temperature.
References Cited (Backward Citations)
US1777982A
Cited
US2250325A
Cited
US2826523A
Cited
US2802088A
Cited
DE1215859B
Cited
US3326211A
Cited
FR1570760A
Cited
US3662057A
Cited
US3680548A
Cited
US3853124A
Cited
US3760056A
Cited
FR2120515A5
Cited
GB1452795A
Cited
US4006741A
Cited
EP0004829A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |