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US3761670A
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Method and apparatus for treating work members by the application of high frequency energy
Assignee: EVANSVILLE VENEER AND LUMBER CO
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Filing: 1972-05-08
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Granted: 1973-09-25
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Expires: 1992-05-08
Abstract
Abstract A method and apparatus for applying high frequency electrical energy to sheet-like or panel-like work members to develop heat therein for driving off moisture from the work member or for causing the setting of glue therein in which the work member is moved in the direction of its length with longitudinally spaced electrodes in engagement therewith between which high frequency electric current flows through the work piece. Electrical insulating material having high dielectric strength and low loss, and of a noncharring nature, is interposed between the electrodes and the work member, thereby substantially reducing the possibility of arc over along or in the work member and, thus, preventing damage thereto.
Inventors
- 👤 M Slaats
- 👤 A Ross
- 👤 J Blessinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:58
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/46; H05B6/60
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
248 words
In an apparatus for treating a flexible sheet-like work member by the application thereto of high frequency electrical energy, said apparatus comprising a frame with an undulating path extending through the frame from an entrance end to an exit end and adapted for the movement therealong of sheet-like work members, high frequency generator means, a plurality of first and second electrode means in said frame in distributed relation along said path, means connecting said first electrode means to one side of said generator means and said second electrode means to the other side of said generator means, said first and second electrode means being adapted to engage opposite surfaces a sheet-like work member disposed on said path and to guide the work member along said path, said first and second electrode means being disposed in spaced alternating relation along said path for the transfer of energy between adjacent ones of said first and second electrode means and through the work member in the direction of the length thereof as said work member moves relative to Said electrode means along said path, low dielectric loss electrical insulating material encapsulating each said electrode means, capacitor means interposed between at least some of said electrode means and the respective side of said generator and increasing in capacitance from the entrance end of said frame toward the exit end thereof, and means for advancing a work member along said path from the entrance end of the frame to the exit end thereof.
Claim 2
Dependent Claim
248 words
In an apparatus for treating a flexible sheet-like work member by the application thereto of high frequency electrical energy, said apparatus comprising a frame with an undulating path extending through the frame from an entrance end to an exit end and adapted for the movement therealong of sheet-like work members, high frequency generator means, a plurality of first and second electrode means in said frame in distributed relation along said path, means connecting said first electrode means to one side of said generator means and said second electrode means to the other side of said generator means, said first and second electrode means being adapted to engage opposite surfaces a sheet-like work member disposed on said path and to guide the work member along said path, said first and second electrode means being disposed in spaced alternating relation along said path for the transfer of energy between adjacent ones of said first and second electrode means and through the work member in the direction of the length thereof as said work member moves relative to Said electrode means along said path, low dielectric loss electrical insulating material encapsulating each said electrode means, capacitor means interposed between at least some of said electrode means and the respective side of said generator and increasing in capacitance from the entrance end of said frame toward the exit end thereof, and means for advancing a work member along said path from the entrance end of the frame to the exit end thereof.
Claim 3
Dependent Claim
189 words
An apparatus according to claim 1 in which said first and second electrode means comprise rollers and are disposed on respective upper and lower rows in said frame with the rollers of each row in spaced coplanar parallel relation on a respective side of said path, said rollers of said upper row thereof being arranged in alternating staggered relation to said rollers of said lower row thereof, said means for advancing a work member along said path comprising means for driving said rollers of said lower row thereof in one direction of rotation and said rollers of the upper row thereof in the opposite direction of rotation whereby a sheet-like work member introduced endwise between said rows of rollers at the entrance end of the frame will be conveyed in the direction of the length thereof between the rollers of the said upper and lower rows thereof to the exit end of the machine, each roller having a metallic core, and said electrical insulating material comprising a coating of substantially uniform radial dimension on each roller and extending about the entire peripheral and axial extent of the respective roller.
Claim 4
Dependent Claim
95 words
An apparatus according to claim 2 in which said frame includes a stationary lower part in which the rollers of said lower row are rotatably mounted and an upper frame part in which said rollers of the upper row are rotatably mounted, and means tiltably connecting one side of said upper frame part to the corresponding side of said lower frame part for tilting of the upper frame part on the lower frame part to expose the sides of said rollers which face the said path along which a work member moves through said frame.
Claim 5
Dependent Claim
45 words
An apparatus according to claim 3 in which said upper frame part includes means adjustably supporting said upper row of rollers therein for movement of the upper row of rollers therein toward and away from the plane of said rollers of the lower row thereof.
Claim 6
Dependent Claim
32 words
An apparatus according to claim 2 which includes means for adjusting the rollers of at least one of said rows toward and away from the plane of the other row of rollers.
Claim 7
Dependent Claim
148 words
An apparatus according to claim 1 in which said first electrode means comprises upper and lower rollers arranged in a plurality of opposed pairs and the rollers of each pair being biased toward each other to engage opposite faces of a sheet-like work member disposed on said path, each said pair of rollers being connected to the same side of said generator means, said second electrode means comprising a pair of electrodes arranged in trailing relation to each said pair of rollers and also engaging opposite faces of a work member disposed on said path and being connected to the opposite side of said generator means, and said means for advancing a work member along said path comprising means for driving at least said rollers to convey a sheet-like work member along said path and through said frame from the entrance end thereof to the exit end thereof.
Claim 8
Dependent Claim
28 words
An apparatus according to claim 1 in which said electrode means are spaced farther apart at the entrance end of the frame than at the exit end thereof.
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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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |