US3710064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave drying system
Assignee: MacMillan Bloedel Ltd
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Filing: 1971-06-03
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Granted: 1973-01-09
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Expires: 1991-06-03
Abstract
Abstract Apparatus for drying moisture-laden dielectric material including a pair of substantially parallel slotted waveguides positioned side by side, material to be dried travelling through the slots of these waveguides, and microwave generating means connected to one end of one of these waveguides and to the opposite end of the other of the waveguides so that microwave energy is directed in opposite directions side by side through the material to effect even drying thereof across its width.
Inventors
- 👤 V Mathur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:14
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/78; H05B2206/00; H05B2206/04; H05B2206/046
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
165 words
A microwave drying system for moisture-laden dielectric material comprising two substantially parallel tubular waveguides arranged side by side, said waveguides having aligned slots in walls thereof and extending longitudinally of the respective waveguides and through which dielectric material can move along a path of travel in a direction longitudinally of the material, said material having side edges facing opposite ends of the waveguides, means for directing a beam of microwave energy into one end of one of said waveguides and against one of said edges of the dielectric material on one side of the paths of travel, and means for directing another beam of microwave energy into an opposite end of the other of said waveguides and against the other of said edges of dielectric material on an opposite side of the path of travel, whereby beams of microwave energy simultaneously travel in the waveguides in opposite directions through said material from the opposite edges of the material as the latter travels through the waveguides.
Claim 2
Dependent Claim
165 words
A microwave drying system for moisture-laden dielectric material comprising two substantially parallel tubular waveguides arranged side by side, said waveguides having aligned slots in walls thereof and extending longitudinally of the respective waveguides and through which dielectric material can move along a path of travel in a direction longitudinally of the material, said material having side edges facing opposite ends of the waveguides, means for directing a beam of microwave energy into one end of one of said waveguides and against one of said edges of the dielectric material on one side of the paths of travel, and means for directing another beam of microwave energy into an opposite end of the other of said waveguides and against the other of said edges of dielectric material on an opposite side of the path of travel, whereby beams of microwave energy simultaneously travel in the waveguides in opposite directions through said material from the opposite edges of the material as the latter travels through the waveguides.
Claim 3
Dependent Claim
40 words
A microwave drying system as claimed in claim 1 including microwave energy absorption means connected to the end of each waveguide opposite to the end of said each waveguide to which one of the microwave beam directing means is connected.
Claim 4
Dependent Claim
54 words
A microwave drying system as claimed in claim 1 in which the means for directing microwave energy into the ends of the two waveguides comprises a single generator, and a magic T connected to divide microwave energy from the generator into two parts and to direct said parts to said ends of the waveguides.
Claim 5
Dependent Claim
212 words
A microwave drying system comprising two slotted meandering waveguides arranged in close succession and reversed relative to each other, each of said waveguides having a plurality of interconnected transverse sections and aligned slots in said sections extending longitudinally of the sections and through which dielectric material can move along a path of travel through both waveguides in a direction longitudinally of the material, said material having opposite side edges facing laterally out from the path of travel, each of said waveguides having an inlet end and an outlet end, said waveguides being arranged with the respective inlet ends thereof positioned on opposite sides of said path of travel, means for directing a beam of microwave energy into the inlet end of one of said waveguides and against one of said edges of the dielectric material on one side of the path of travel, and means for directing another beam of microwave energy into the inlet end of the other of said waveguides and against the other of said edges of the dielectric material on the opposite side of said path of travel, whereby beams of microwave energy simultaneously travel in the waveguides in opposite directions through said material from the opposite edges of the material as the latter travels through the waveguides.
Claim 6
Dependent Claim
212 words
A microwave drying system comprising two slotted meandering waveguides arranged in close succession and reversed relative to each other, each of said waveguides having a plurality of interconnected transverse sections and aligned slots in said sections extending longitudinally of the sections and through which dielectric material can move along a path of travel through both waveguides in a direction longitudinally of the material, said material having opposite side edges facing laterally out from the path of travel, each of said waveguides having an inlet end and an outlet end, said waveguides being arranged with the respective inlet ends thereof positioned on opposite sides of said path of travel, means for directing a beam of microwave energy into the inlet end of one of said waveguides and against one of said edges of the dielectric material on one side of the path of travel, and means for directing another beam of microwave energy into the inlet end of the other of said waveguides and against the other of said edges of the dielectric material on the opposite side of said path of travel, whereby beams of microwave energy simultaneously travel in the waveguides in opposite directions through said material from the opposite edges of the material as the latter travels through the waveguides.
Claim 7
Dependent Claim
22 words
A microwave drying system as claimed in claim 4 including microwave energy absorption means connected to the outlet end of each waveguide.
Claim 8
Dependent Claim
56 words
A microwave drying system as claimed in claim 4 in which the means for directing microwave energy into the inlet ends of the two waveguides comprises a single generator, and a magic T connected to divide microwave energy from the generator into two parts and to direct said parts to said inlet end of the waveguides.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |