US3962016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for joining abutting thermoplastic synthetic-resin foam sheets
Assignee: Dynamit Nobel AG
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Filing: 1974-09-16
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Granted: 1976-06-08
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Expires: 1994-09-16
Abstract
Abstract A process for joining abutting thermoplastic synthetic resin foam structures by a strip which covers a junction zone formed between the foam structures including the steps of pressing a metal strip heated to above the softening point and or the melting temperature of the synthetic resin foam under slight pressure onto the junction zone and then allowing the metal strip to cool. In this manner, a bond is formed between the foam structures and the metal strip.
Inventors
- 👤 Franz Werner Alfter
- 👤 Hans-Ulrich Breitscheidel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:57
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/10; B29C65/34; B29C65/3404; B29C65/3444; B29C65/3472; B29C65/3476; B29C65/44; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/114; B29C66/1142; B29C66/40; B29C66/41; B29C66/43; B29C66/70; B29C66/72; B29C66/727; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/83; B29C66/836; B29C66/8362; B29C66/84; B29C66/861; B29C66/865; B29C66/8652; B29C65/103; B29C65/3468; B29C65/48; B29C65/4805; B29C65/481; B29C65/4815; B29C65/50; B29C65/5042; B29C65/5092; B29C66/12; B29C66/122; B29C66/1222; B29C66/1224; B29C66/71; B29C66/737; B29C66/7375; B29C66/73751; B29C66/73752; B29C66/73753; B29C66/73754; B29C66/74; B29C66/742; B29K; B29K2025/00; B29K2075/00; B29K2105/00; B29K2105/04; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1715; Y10T156/1717; Y10T428/00; Y10T428/19; Y10T428/192; Y10T428/22; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
73 words
A process for joining abutting thermoplastic synthetic resin foam structures having planar peripheral surfaces by a strip covering the junction zone between the foam structures which comprises heating a metal strip to above the softening temperature of the synthetic resin foam, pressing the heated metal strip under slight pressure onto the junction zone and allowing the metal strip to cool whereby a bond is formed between the foam structures and the metal strip.
Claim 2
Dependent Claim
73 words
A process for joining abutting thermoplastic synthetic resin foam structures having planar peripheral surfaces by a strip covering the junction zone between the foam structures which comprises heating a metal strip to above the softening temperature of the synthetic resin foam, pressing the heated metal strip under slight pressure onto the junction zone and allowing the metal strip to cool whereby a bond is formed between the foam structures and the metal strip.
Claim 3
Dependent Claim
14 words
The process according to claim 1, wherein the metal strip is made of aluminum.
Claim 4
Dependent Claim
36 words
The process according to claim 1, wherein the metal strip is coated, on the side contacting the junction zone, with a thermally activatable adhesive agent, which adhesive agent is activated during heating of the metal strip.
Claim 5
Dependent Claim
27 words
The process according to claim 3, wherein the synthetic resin used for forming the adhesive coating is the same as that for forming the synthetic-resin foam sheet.
Claim 6
Dependent Claim
32 words
The process according to claim 1, wherein surfaces of the foam structures beneath the metal strip are melted by said metal strip whereby a permanent bond is formed between said foam structures.
Claim 7
Dependent Claim
18 words
The process according to claim 5, wherein the metal strip penetrates within the surfaces of the foam structures.
Claim 8
Dependent Claim
33 words
The process according to claim 5, wherein the foam structures are formed of a synthetic resin foam selected from the group consisting of cross-linked and non-cross-linked polyethylene foam, polyurethane foam and polystyrene foam.
Claim 9
Dependent Claim
29 words
The process of claim 1, wherein the foam structures have a thickness of from 3 to 30 mm. and the metal strip has a thickness between 50μ and 300μ.
Claim 10
Dependent Claim
29 words
The process of claim 1, wherein the metal strip is thin enough to be rolled up in a storage roll and then unrolled during application to said junction zone.
Claim 11
Dependent Claim
46 words
The process of claim 1, further comprising unrolling said metal strip from a storage roll, guiding the metal strip to a pressure roller, heating the metal strip in front of the pressure roller and pressing the metal strip onto said junction zone with said pressure roller.
Claim 12
Dependent Claim
26 words
The process of claim 10, wherein the metal strip is heated alone by a heated gas to a temperature of from at least 200°C. to 300°C.
References Cited (Backward Citations)
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US2372737A
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US3303954A
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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) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |