Patent US5032327A successfully refreshed from Google Patents.
US5032327A
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Method and a device for the shaping and curing of thermosetting plastic material work-pieces
Assignee: Chausson Usines SA
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Filing: 1989-06-14
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Granted: 1991-07-16
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Expires: 2009-06-14
Abstract
Abstract Forming tools are arranged inside a metallic caisson formed by means of open boxes provided with nesting portions. The forming tools are connected to a microwave generator and are made of a material with a small absorption capacity for the microwaves and adapted for supporting pressure within the range of 50 to 200 bars. The forming tools have working faces of a shape mating that of a work piece to be obtained.
Inventors
- 👤 Claude Becheret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:49
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/80; B; B29; B29C; B29C33/00; B29C33/02; B29C33/06; B29C35/00; B29C35/02; B29C35/08; B29C43/00; B29C43/32; B29C43/36; B29C70/00; B29C70/88; B29C70/882; B29C70/885; B29C35/0805; B29C2035/0855; B29K; B29K2995/00; B29K2995/0003; B29K2995/0005; Y; Y10; Y10S; Y10S264/00; Y10S264/46
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
121 words
A method for forming and curing a thermosetting plastic material work piece placed in a metallic caisson connected to a generator of microwaves comprising the steps of forming the metallic caisson by means of open boxes provided with nesting portions; connecting the metallic caisson to the plates of a press; providing forming tools made of a material with a small absorption capacity for the microwaves and adapted for supporting pressures within the ranges of 50 to 200 bars and having working faces of a shape which is mating that of the work piece to be obtained; arranging said forming tools inside the metallic caisson; introducing a material between the forming tools and activating the plates of the press and the generator.
Claim 2
Independent Claim
121 words
A method for forming and curing a thermosetting plastic material work piece placed in a metallic caisson connected to a generator of microwaves comprising the steps of forming the metallic caisson by means of open boxes provided with nesting portions; connecting the metallic caisson to the plates of a press; providing forming tools made of a material with a small absorption capacity for the microwaves and adapted for supporting pressures within the ranges of 50 to 200 bars and having working faces of a shape which is mating that of the work piece to be obtained; arranging said forming tools inside the metallic caisson; introducing a material between the forming tools and activating the plates of the press and the generator.
Claim 3
Dependent Claim
27 words
A method as set forth in claim 1, comprising the further step of slaving the microwave generator power to temperature of the work piece to be obtained.
Claim 4
Dependent Claim
33 words
A method as set forth in claim 1, comprising the further step of reducing the pressure required for obtaining the work piece, by a fine regulation of temperature increase inside the metallic caisson.
Claim 5
Dependent Claim
33 words
A method as set forth in claim 1, comprising the further step of finely regulating temperature of the work piece, in order to minimize forming and curing cycle timings for the work piece.
Claim 6
Independent Claim
64 words
A device for forming and curing a thermosetting plastic material work piece, which device includes a metallic caisson connected to plates of a press and comprising two boxes provided with nesting portions, said two boxes containing forming tools of a material with a small absorption capacity for microwaves transmitted by waveguides connected to a generator and a power adjusting device for controlling said generator.
Claim 7
Independent Claim
64 words
A device for forming and curing a thermosetting plastic material work piece, which device includes a metallic caisson connected to plates of a press and comprising two boxes provided with nesting portions, said two boxes containing forming tools of a material with a small absorption capacity for microwaves transmitted by waveguides connected to a generator and a power adjusting device for controlling said generator.
Claim 8
Dependent Claim
39 words
A device as set forth in claim 5, wherein the forming tools are made of a punch and a matrix made of a material having a small absorption capacity for microwaves, and provided with compression members preferably of steel.
Claim 9
Dependent Claim
23 words
A device as set forth in claim 5, wherein the forming tools are interchangeable inside the caisson which is tight sealed to microwaves.
Claim 10
Dependent Claim
25 words
A device as set forth in claim 5, wherein said nesting portions are formed with grooves or metallic seals so to form a microwave trap.
Claim 11
Dependent Claim
27 words
A method as set forth in claim 1, wherein the material is a paste of a volume larger than that of the work piece to be obtained.
Claim 12
Dependent Claim
27 words
A method as set forth in claim 1, wherein the material is a sheet of a volume larger than that of the work piece to be obtained.
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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) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |