US4403382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing electromechanical transducers using at least one polymer film
Assignee: Thales SA
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Filing: 1981-03-02
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Granted: 1983-09-13
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Expires: 2001-03-02
Abstract
Abstract The invention relates to the manufacture of electromechanical transducers with at least one element made from a polymer material shaped and polarized so as to obtain an active self-supporting structure having a nondevelopable surface and to a manufacturing process which consists in shaping a structure already coated with metalizations, so that the electric polarizing field may be applied to the structure during shaping and until return thereof to ambient temperature.
Inventors
- 👤 Hugues Facoetti
- 👤 Patrick Petit
- 👤 Philippe Menoret
- 👤 Francois Micheron
- 👤 Pierre Ravinet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:06
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/01; H10N30/09; H10N30/098; H04; H04R; H04R17/00; H04R17/005; H10N30/04; H10N30/045; Y; Y10; Y10S; Y10S310/00; Y10S310/80; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
82 words
A process for manufacturing electromechanical transducers using at least one polymer film which is subjected to shaping, said process comprising: providing two faces of a flat structure comprising said film with similar metalizations intended to form electrodes; and shaping said flat structure with metalizations thereon to produce a self-supporting and nondevelopable structure by applying a polarizing voltage to said metalizations while carrying out bidirectional stretching so that the mechanical stress permanently increases the surface area of the metalizations carried by said structure.
Claim 2
Dependent Claim
82 words
A process for manufacturing electromechanical transducers using at least one polymer film which is subjected to shaping, said process comprising: providing two faces of a flat structure comprising said film with similar metalizations intended to form electrodes; and shaping said flat structure with metalizations thereon to produce a self-supporting and nondevelopable structure by applying a polarizing voltage to said metalizations while carrying out bidirectional stretching so that the mechanical stress permanently increases the surface area of the metalizations carried by said structure.
Claim 3
Dependent Claim
39 words
The process as claimed in claim 1, wherein said structure is heated and cooled the shaping occurring within a period of time separating the heating phase from the cooling phase; the polarizing voltage being maintained during the cooling phase.
Claim 4
Dependent Claim
36 words
The process as claimed in claim 1, wherein said mechanical stress is exerted on one of the faces of said structure by means of a solid body carrying the impression of the shape to be formed.
Claim 5
Dependent Claim
30 words
The process as claimed in claim 3, wherein said stress results from the pressing of nonclamped parts of said structure by means having a rigid frame fitted with clamping jaws.
Claim 6
Dependent Claim
37 words
The process as claimed in claim 3, wherein said structure is formed to have a cavity in the other face; a hydrostatic thrust produced by a fluid contained in a cavity forcing said structure against said impression.
Claim 7
Dependent Claim
32 words
The process as claimed in claim 5, wherein said fluid contained in said cavity is at atmospheric pressure; the forcing taking place by atmospheric pressure exerted on the face of the impression.
Claim 8
Dependent Claim
20 words
The process as claimed in claim 3, wherein separation of the shaped structure and the impression is caused by suction.
Claim 9
Dependent Claim
46 words
The process as claimed in claim 3, wherein said flat structure to be shaped is metalized by thermal evaporation in a vacuum at first along the other face and then along said one face; said one face being turned toward the impression of the solid body.
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) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |