US3769132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of intimately bonding thermoplastics
Assignee: High Voltage Engineering Corp
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Filing: 1969-11-06
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Granted: 1973-10-30
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Expires: 1989-11-06
Abstract
Abstract A process for intimately bonding a conducting or semiconducting thermoplastic layer to a non-conducting thermoplastic substrate. The bond achieved between the two thermoplastic layers is devoid of gas and is particularly adaptable to high voltage insulation and capacitor applications.
Inventors
- 👤 R Cram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:22
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/40; B29C66/47; B29C65/00; B29C65/02; B29C65/18; B29C66/001; B29C66/01; B29C66/03; B29C66/034; B29C66/0344; B29C66/342; B29C66/70; B29C66/73; B29C66/731; B29C66/7314; B29C66/73141; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/816; B29C66/8161; B29C66/818; B29C66/8181; B29C66/81811; B29C66/83; B29C66/832; B29C66/8322; H; H01; H01G; H01G13/00; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/472; B29C66/474; B29C66/8182; B29C66/81821; B29C66/83221
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
31 words
The method of bonding layers of thermoplastic to a thermoplastic substrate as set forth in claim 1 wherein said application of a thermoplastic layer is by spraying on a solvent solution.
Claim 2
Dependent Claim
34 words
The method for bonding layers of thermoplastic to a thermoplastic substrate as set forth in claim 1 wherein said application of a thermoplastic layer is by placement of a thermoplastic sheet upon said substrate.
Claim 3
Dependent Claim
41 words
The method for bonding layers of thermoplastic to a thermoplastic substrate as set forth in claim 3 wherein previous to the step of pressing, a vacuum seal is provided around said substrate and thermoplastic layer in said sealed region is evacuated.
Claim 4
Dependent Claim
30 words
The method for bonding layers of thermoplastic to a thermoplastic substrate as set forth in claim 2 wherein said solvent solution has particles to provide layers having a predetermined resistivity.
Claim 5
Dependent Claim
32 words
The method for bonding layers of thermoplastic to a thermoplastic substrate as set forth in claim 3 wherein said thermoplastic sheath is impregnated with conducting particles having a predetermined resiStivity per square.
Claim 6
Dependent Claim
34 words
The method for bonding layers of thermoplastic to a thermoplastic substrate as set forth in claim 1 wherein the softening temperature of the substrate is greater than the softening temperature of the thermoplastic layers.
Claim 7
Dependent Claim
37 words
The method for bonding layers of thermoplastic to a thermoplastic substrate as set forth in claim 1 wherein following said cooling, the bonded thermoplastic layers and substrate are annealed to draw out stress concentration and eliminate warping.
Claim 8
Dependent Claim
24 words
The method for bonding layers of thermoplastic to a thermoplastic substrate as set forth in claim 1 wherein said thermoplastic layers are carbon-loaded polyethylene.
Claim 9
Dependent Claim
24 words
The method for bonding layers of thermoplastic to a thermoplastic substrate as set forth in claim 1 wherein said thermoplastic layers are carbon-loaded vinyl.
Claim 10
Dependent Claim
34 words
The method for bonding layers of thermoplastic to a thermoplastic substrate as set forth in claim 1 wherein previous to the applying step, the thermoplastic substrate has been cross-linked to increase its melting point.
Claim 11
Dependent Claim
34 words
The method for bonding layers of thermoplastic to a thermoplastic substrate as set forth in claim 1 wherein previous to the applying step, the thermoplastic layers have been cross-linked to increase their melting point.
References Cited (Backward Citations)
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US2766809A
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US3035958A
Cited
US3149017A
Cited
US3074466A
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US3508944A
Cited
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US3380870A
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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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |