US4179595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multimodal resonant cavity for very high frequency heating
Assignee: Saint Gobain Industries SA
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Filing: 1977-08-15
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Granted: 1979-12-18
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Expires: 1997-08-15
Abstract
Abstract Microwave heating apparatus especially useful for heating and curing reinforced thermo-hardenable synthetic resins is disclosed. Heating cells are formed by parallelepipedal enclosures, the walls of which are odd multiples of 1/4 the wavelength of electromagnetic energy being utilized for heating. Adjustment means for adjusting the enclosure to minimize reflected power are mounted within the enclosure. A production line comprises a series of successive heating cells that are supplied from the same power source; die structures between the cells can be used to form the material being processed.
Inventors
- 👤 Georges Chiron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:15
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/78; H05B6/788; B; B29; B29C; B29C35/00; B29C35/02; B29C35/08; B29C35/10; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/50; B29C70/52; B29C70/525; B29C70/528; B29C35/0805; B29C2035/0855
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
141 words
High frequency heating apparatus comprising a resonant parallelepipedal metallic enclosure, generating means for generating high frequency electromagnetic energy in the micro-wave range, wave guide means for connecting the generator to the enclosure, the three dimensions of the enclosure being odd multiples of 1/4 the wavelength of the electromagnetic energy generated by the generator; a rough adjustment member comprising a plate spaced parallel to one side of the enclosure and means mounting the plate for movement a distance in the range between zero and 1/8 the wavelength of the energy supplied by the generator in a direction normal to the plane of said side of the enclosure; and a fine adjustment member having a planar surface facing the wave guide means and means for changing the angular relationship of the plane of the planar surface with respect to the wave guide means.
Claim 2
Dependent Claim
141 words
High frequency heating apparatus comprising a resonant parallelepipedal metallic enclosure, generating means for generating high frequency electromagnetic energy in the micro-wave range, wave guide means for connecting the generator to the enclosure, the three dimensions of the enclosure being odd multiples of 1/4 the wavelength of the electromagnetic energy generated by the generator; a rough adjustment member comprising a plate spaced parallel to one side of the enclosure and means mounting the plate for movement a distance in the range between zero and 1/8 the wavelength of the energy supplied by the generator in a direction normal to the plane of said side of the enclosure; and a fine adjustment member having a planar surface facing the wave guide means and means for changing the angular relationship of the plane of the planar surface with respect to the wave guide means.
Claim 3
Dependent Claim
13 words
Apparatus as in claim 1 wherein the plate faces the wave guide means.
Claim 4
Dependent Claim
28 words
Apparatus as in claim 1 wherein the dimensions of the surfaces of the member are between 1/4 and 1/2 the wavelength of the energy supplied by the generator.
Claim 5
Dependent Claim
18 words
Apparatus according to claim 1 including means for measuring incident and reflected energy in the wave guide means.
Claim 6
Dependent Claim
39 words
Apparatus as in claim 1 including at least one duct formed of a dielectric material extending through the enclosure in a direction perpendicular to the direction of incident electromagnetic waves for conducting material to be treated through the enclosure.
Claim 7
Dependent Claim
165 words
Heating and forming apparatus comprising a first parallelepipedal resonant metallic enclosure and a second parallelepipedal resonant metallic enclosure, a forming die located between the first and second enclosures, a generating means for generating electromagnetic energy in the micro-wave range, wave guide means for conducting electromagnetic energy from the generator means to the enclosures, the three dimensions of each enclosure being odd multiples of 1/4 the wavelength of the energy generated by said generating means, each enclosure including a rough adjustment member comprising a plate placed parallel to one side of the enclosure and means mounting the plate for movement a distance in the range between zero and 1/8 the wavelength of the energy supplied by the generator in a direction normal to the plane of said side of the enclosure, and a fine adjustment member having a planar surface facing the wave guide means and means for changing the angular relationship of the plane of the planar surface with respect to the wave guide means.
Claim 8
Dependent Claim
165 words
Heating and forming apparatus comprising a first parallelepipedal resonant metallic enclosure and a second parallelepipedal resonant metallic enclosure, a forming die located between the first and second enclosures, a generating means for generating electromagnetic energy in the micro-wave range, wave guide means for conducting electromagnetic energy from the generator means to the enclosures, the three dimensions of each enclosure being odd multiples of 1/4 the wavelength of the energy generated by said generating means, each enclosure including a rough adjustment member comprising a plate placed parallel to one side of the enclosure and means mounting the plate for movement a distance in the range between zero and 1/8 the wavelength of the energy supplied by the generator in a direction normal to the plane of said side of the enclosure, and a fine adjustment member having a planar surface facing the wave guide means and means for changing the angular relationship of the plane of the planar surface with respect to the wave guide means.
Claim 9
Dependent Claim
18 words
Apparatus as in claim 6, wherein the enclosures are supplied with electromagnetic energy from the same generating means.
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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) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |