Patent US4112285A successfully refreshed from Google Patents.
US4112285A
Expired / Lapsed
US
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Induction heating using parallel electric/magnetic fields
Assignee: Continental Group Inc
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Filing: 1977-03-14
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Granted: 1978-09-05
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Expires: 1997-03-14
Abstract
Abstract An induction heater system for fusing substrates having charged powder particles deposited thereon, the system comprising a conveyor means for conveying the substrates along a predetermined path and a fusing means disposed along and adjacent to the predetermined path for fusing the substrates. There is provided a means for creating an electric field in a given direction so as to provide a counter force in a direction opposite to the direction of tear-away forces acting on the particles, the latter being created by the electromagnetic influence of the fusing means on the particles.
Inventors
- 👤 Peter N. Y. Pan
- 👤 Steve F. Wronski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:11
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/101; H05B6/103; B; B22; B22F; B22F1/00; B22F1/14; B22F7/00; B22F7/02; C; C23; C23C; C23C24/00; C23C24/08; C23C24/10
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
96 words
An induction heater system for fusing substrates having charged powder particles deposited thereon, said system comprising, in combination: conveyor means for conveying said substrates along a predetermined path; fusing means disposed along and adjacent to said predetermined path for fusing said substrates, said fusing means acting on said particles so as to impose thereon tear-away forces acting in a direction away from said predetermined path; and electric field creating means adjacent to said predetermined path for imposing an electric field force on said powder particles in a direction opposite to the direction of said tear-away forces.
Claim 2
Dependent Claim
96 words
An induction heater system for fusing substrates having charged powder particles deposited thereon, said system comprising, in combination: conveyor means for conveying said substrates along a predetermined path; fusing means disposed along and adjacent to said predetermined path for fusing said substrates, said fusing means acting on said particles so as to impose thereon tear-away forces acting in a direction away from said predetermined path; and electric field creating means adjacent to said predetermined path for imposing an electric field force on said powder particles in a direction opposite to the direction of said tear-away forces.
Claim 3
Dependent Claim
54 words
A system as recited in claim 1 wherein said electric field creating means includes DC voltage means for providing DC voltage, and electrode means connected to said DC voltage means and disposed adjacent to said predetermined path for receiving said DC voltage and responsive thereto for imposing said electric field force on said particles.
Claim 4
Dependent Claim
17 words
A system as recited in claim 2 wherein said DC voltage means provides a high DC voltage.
Claim 5
Dependent Claim
41 words
A system as recited in claim 2 wherein said predetermined path is a planar path and said tear-away forces act perpendicularly to said planar path, said electrode means being a flat planar electrode disposed parallel and adjacent to said planar path.
Claim 6
Dependent Claim
43 words
A system as recited in claim 2 wherein said predetermined path is a planar path and said tear-away forces act transverse and parallel to said planar path, said electrode means being a flat planar electrode disposed perpendicular and adjacent to said planar path.
Claim 7
Dependent Claim
17 words
A system as recited in claim 2 wherein said fusing means includes a single induction heater coil.
Claim 8
Dependent Claim
73 words
A system as recited in claim 6 wherein said predetermined path is a planar path and said single induction heater coil is disposed on one side of and parallel to said planar path, said tear-away forces being electromagnetic forces transversely parallel to said planar path and imposed on said charged particles by said single induction heater coil, said electrode means being a flat planar electrode disposed perpendicular and adjacent to said planar path.
Claim 9
Dependent Claim
82 words
A system as recited in claim 6 wherein said fusing means also includes a high frequency generator means connected to said single induction heater coil for applying a high frequency signal thereto, said high frequency signal acting on said particles to vibrate them so as to effect tear-away forces perpendicular to and away from said planar path, said electrode means being a flat planar electrode disposed parallel to and on that side of said planar path remote from said induction heater coil.
Claim 10
Dependent Claim
49 words
A system as recited in claim 6 wherein said single induction heater coil has an angular design for simulating rotation of said substrates as said substrates move through said system wherein the simulated rotation causes a temperature uniformity of ± 10° F. to be substantially maintained across said substrate.
Claim 11
Dependent Claim
56 words
A system as recited in claim 1 wherein said electric field creating means includes DC voltage means for providing a DC voltage, and electric wire means connected to said DC voltage means and disposed adjacent to said predetermined path for receiving said DC voltage and responsive thereto for imposing said electric field force on said particles.
Claim 12
Dependent Claim
17 words
A system as recited in claim 10 wherein said DC voltage means provides a high DC voltage.
Claim 13
Dependent Claim
41 words
A system as recited in claim 10 wherein said predetermined path is a planar path and said tear-away forces act perpendicularly to said planar path, said electric wire means being disposed in a plane parallel and adjacent to said planar path.
Claim 14
Dependent Claim
52 words
A system as recited in claim 10 wherein said predetermined path is a planar path and said tear-away forces act transverse and parallel to said planar path, said electric field creating means including a flat plane electrode disposed perpendicularly and adjacent to said planar path and connected to said DC voltage means.
Claim 15
Dependent Claim
52 words
A system as recited in claim 10 wherein said predetermined path is a planar path and said fusing means includes a first induction heater coil on one side of and parallel to said planar path and a second induction heater coil on the other side of and parallel to said planar path.
Claim 16
Dependent Claim
33 words
A system as recited in claim 14 wherein said tear-away forces act perpendicularly to said planar path, said electric wire means being disposed in a plane parallel and adjacent to said planar path.
Claim 17
Dependent Claim
42 words
A system as recited in claim 15 wherein said electric wire means is disposed between said planar path and one of said induction heater coils, and including insulation means between said electric wire means and said one of said induction heater coils.
Claim 18
Dependent Claim
44 words
A system as recited in claim 15 wherein said tear-away forces act transverse and parallel to said planar path, said electric field creating means including a flat plane electrode disposed perpendicularly and adjacent to said planar path and connected to said DC voltage means.
Claim 19
Dependent Claim
33 words
A system as recited in claim 15 wherein said fusing means also includes high frequency generator means connected to said first and second induction heater coils for applying a high frequency signal thereto.
Claim 20
Dependent Claim
28 words
A system as recited in claim 18 wherein said high frequency generator means applies signals of such high frequency so as to preclude tear-away forces due to vibration.
Claim 21
Dependent Claim
52 words
A system as recited in claim 14 wherein said first and second induction heater coils each has an angular design for simulating rotation of said substrates as said substrates move through said system wherein the simulated rotation causes a temperature uniformity of ± 10° F. to be substantially maintained across said substrate.
Claim 22
Dependent Claim
85 words
A system as recited in claim 1 wherein said predetermined path is a planar path and said fusing means includes a first induction heater coil on one side of and parallel to said planar path and a second induction heater coil on the other side of and parallel to said planar path and wherein said fusing means includes first and second lamination means connected to said first and second induction heater coils, respectively, remote from said planar path for mounting said respective induction heater coils.
Claim 23
Dependent Claim
44 words
A system as recited in claim 21 wherein said lamination means are electroconductive, said electric field creating means including DC voltage means connected to said first and second lamination means for applying a high voltage thereto so as to create said electric field force.
Claim 24
Dependent Claim
26 words
A system as recited in claim 22 wherein said fusing means includes insulation means carried on and electrically insulating said first and second induction heater coils.
Claim 25
Dependent Claim
52 words
A system as recited in claim 21 wherein said first and second induction heater coils each has an angular design for simulating rotation of said substrates as said substrates move through said system wherein the simulated rotation causes a temperature uniformity of ± 10° F. to be substantially maintained across said substrate.
Claim 26
Dependent Claim
14 words
A system as recited in claim 1 wherein said substrates are can end units.
Claim 27
Independent Claim
109 words
A method of counteracting tear-away forces while fusing substrates having charged powder particles deposited thereon, comprising the steps of: (a) conveying said substrates along a predetermined path; (b) providing at least one induction heater coil adjacent to said predetermined path; (c) applying high frequency current to said at least one induction heater coil so as to fuse said substrates, while imposing on said powder particles a tear-away force in a direction away from said predetermined path; and (d) applying a DC electric field to said substrates so as to impose a counter-force on said powder particles in a direction toward said predetermined path, whereby to counteract said tear-away force.
Claim 28
Independent Claim
109 words
A method of counteracting tear-away forces while fusing substrates having charged powder particles deposited thereon, comprising the steps of: (a) conveying said substrates along a predetermined path; (b) providing at least one induction heater coil adjacent to said predetermined path; (c) applying high frequency current to said at least one induction heater coil so as to fuse said substrates, while imposing on said powder particles a tear-away force in a direction away from said predetermined path; and (d) applying a DC electric field to said substrates so as to impose a counter-force on said powder particles in a direction toward said predetermined path, whereby to counteract said tear-away force.
Claim 29
Dependent Claim
45 words
A method as recited in claim 26 wherein step (d) comprises providing an electrode adjacent to said predetermined path and remote from said at least one induction heater coil, and applying a high voltage to said electrode so as to create said DC electric field.
Claim 30
Dependent Claim
38 words
A method as recited in claim 26 wherein said step (d) comprises providing an electric wire adjacent to said predetermined path, and applying a high voltage to said electric wire so as to create said DC electric field.
Claim 31
Dependent Claim
30 words
A method as recited in claim 28 wherein step (d) includes providing an insulator between and joining said electric wire and one of said at least one induction heater coils.
Claim 32
Dependent Claim
46 words
A method as recited in claim 26 wherein a plurality of induction heater coils is provided adjacent said path and step (b) includes providing one lamination for each of said induction heater coils, and connecting each lamination to a respective one of said induction heat coils.
Claim 33
Dependent Claim
31 words
A method as recited in claim 30 wherein step (d) comprises applying a voltage to each of said laminations provided during step (b) so as to create said DC electric field.
Claim 34
Dependent Claim
18 words
A method as recited in claim 26 wherein said substrates conveyed during step (a) are can end units.
Claim 35
Dependent Claim
93 words
A method as recited in claim 26 wherein said induction heater coil of step (b) has an angular design, the high frequency current of step (d) is subjected to the angularity of said induction heater coil whereby the high frequency current is rotated in a plane parallel to said induction heater coil, and the rotation of the high frequency current simulates rotation of said substrates as said substrates move over said induction heater coil whereby the simulated rotation causes a temperature uniformity of ± 10° F. to be substantially maintained across said substrate.
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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |