US3629040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making laminated panels incorporating heating wires
Assignee: Pilkington Automotive Ltd
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Filing: 1968-06-10
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Granted: 1971-12-21
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Expires: 1988-06-10
Abstract
Abstract Method of making laminated panels incorporating heating wires including the steps of placing the heating wires on a first sheet, locating the wires in place with a layer of adhesive, placing two feed conductors across the heating wires and laminating the first sheet and a second sheet and the intermediate layer together, then applying electricity at high frequency between the two feed conductors so as to cause a good electrical connection to be formed between at least some of the heating wires and the feed conductors where a good electrical connection did not previously exist.
Inventors
- 👤 Brian J Hinton
- 👤 Kenneth F Kite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:27
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10165; B32B17/10376; B32B17/1055; B32B17/10761; B32B17/10807; B32B17/10899; B32B17/10926; F; F24; F24D; F24D13/00; F24D13/02; F24D13/022; F24D13/024; Y; Y02; Y02B; Y02B30/00; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49083
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
38 words
A method according to claim 1 in which the step of applying electricity at high frequency between the two feed conductors is effected after the step of laminating the first and second sheets and the intermediate layer together.
Claim 2
Dependent Claim
33 words
A method according to claim 1 in which the feed conductors are formed into arches over the heating wires before the step of applying electricity at high frequency between the two feed conductors.
Claim 3
Dependent Claim
41 words
A method according to claim 3 in which the feed conductors are formed into arches, before the intermediate layer is placed over them, by a suitable tool being passed along each of the feed conductors while pressure is applied by it.
Claim 4
Dependent Claim
23 words
A method according to claim 4 including the step of heatIng the tool as it is passed along each of the feed conductors.
Claim 5
Dependent Claim
22 words
A method according to claim 1 in which the electricity at substantially 5000kc./s. is applied for substantially 1/2 > or = seconds.
Claim 6
Dependent Claim
44 words
A method according to claim 1 in which the intermediate layer comprises a sheet of a poly-vinyl-butyl aldehyde resin and in which the adhesive comprises similar material which is dissolved in a volatile solvent to form a solution which is applied as a spray.
Claim 7
Dependent Claim
20 words
A method according to claim 1 in which the heating wires comprise lengths of tungsten wire 0.0005 inches in diameter.
Claim 8
Dependent Claim
35 words
A method according to claim 1 in which the design resistance of the laminated panel is 2 ohms and the high frequency is applied by apparatus capable of giving a maximum output of 500 volts.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |