Patent US3678720A successfully refreshed from Google Patents.
US3678720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller leveler and method of leveling
Assignee: Sutton Engineering Co
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Filing: 1970-08-13
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Granted: 1972-07-25
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Expires: 1990-08-13
Abstract
Abstract In a roller leveler a roll is rotatably supported in a position to be engaged by an elongated workpiece traveling through the leveler. The roll has a hollow cylindrical body, inside of which there are ferroelectric transducers close to its inner surface. These transducers are driven electrically to vibrate the roll body radially in all directions at ultrasonic frequencies to relieve residual stresses in the workpiece passing across the roll.
Inventors
- 👤 Clyde W Dickey
- 👤 Ray A Bland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:25
CPC Classifications
F; F16; F16C; F16C13/00; B; B21; B21D; B21D1/00; B21D1/02; B21D35/00; B21D35/002; B21D35/008
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
137 words
In a roller leveler, a framework, an ultrasonic roll, and means rotatably supporting the roll in the framework in a position to be engaged by an elongated workpiece passing through the leveler, said roll comprising a hollow cylindrical roll body, a support inside said hollow roll body and extending axially thereof, means rigidly holding said support and spacing it from the inner surface of the roll body, ferroelectric transducers inside said roll body supported by said support close to but spaced from said inner surface of the roll body, means sealing the opposite ends of the roll body, a liquid filling all of the empty space between said support and the encircling roll body, and electrical means for driving the transducers to vibrate said roll body radially at ultrasonic frequencies to cause the workpiece to become flat.
Claim 2
Dependent Claim
137 words
In a roller leveler, a framework, an ultrasonic roll, and means rotatably supporting the roll in the framework in a position to be engaged by an elongated workpiece passing through the leveler, said roll comprising a hollow cylindrical roll body, a support inside said hollow roll body and extending axially thereof, means rigidly holding said support and spacing it from the inner surface of the roll body, ferroelectric transducers inside said roll body supported by said support close to but spaced from said inner surface of the roll body, means sealing the opposite ends of the roll body, a liquid filling all of the empty space between said support and the encircling roll body, and electrical means for driving the transducers to vibrate said roll body radially at ultrasonic frequencies to cause the workpiece to become flat.
Claim 3
Dependent Claim
53 words
In a roller leveler according to claim 1, thrust rollers in said framework engaging the opposite ends of said roll body to prevent axial movement of the roll, and said roll-supporting means being support rollers engaging the outer surface of the roll body at its ends for preventing radial displacement of the roll.
Claim 4
Dependent Claim
75 words
In a rOller leveler according to claim 1, said electrical means including a transformer core section mounted in an end of said hollow roll body, and a secondary winding carried by said core, the leveler also including a transformer core section mounted in said framework at said end of the roll, and a primary winding carried by said last-mentioned core section, the two core sections being axially aligned with a slight air gap between them.
Claim 5
Dependent Claim
31 words
In a roller leveler according to claim 3, one of said core sections being rigidly mounted in said roll body, and the other core section being rigidly mounted in said framework.
Claim 6
Dependent Claim
59 words
In a roller leveler according to claim 1, said support being hollow and provided with an air chamber having a flexible wall, and said support being provided with an opening outside said chamber communicating with said wall, said liquid engaging said flexible wall to compress air in said chamber when the liquid in said roll body expands with heat.
Claim 7
Dependent Claim
52 words
In a roller leveler according to claim 1, idler rolls mounted in said framework at opposite sides of said ultrasonic roll for engaging the side of the workpiece opposite to the side engaging said roll and means for adjusting the spacing between said idler rolls to obtain longitudinal resonance in the workpiece.
Claim 8
Dependent Claim
30 words
In a roller leveler according to claim 6, backup rolls engaging the ultrasonic roll at points diametrically opposite the ends of the arc of said roll engageable by the workpiece.
Claim 9
Dependent Claim
75 words
In the method of roller leveling or straightening a longitudinally moving elongated metal workpiece by reversely bending it, the steps comprising directing the workpiece part way around a hollow roll in engagement therewith throughout an arc of not more than 90*, simultaneously returning the strip in the opposite direction part way around the opposite side of said roll in engagement therewith, and subjecting the roll to radial vibrations in all directions at an ultrasonic frequency.
Claim 10
Dependent Claim
75 words
In the method of roller leveling or straightening a longitudinally moving elongated metal workpiece by reversely bending it, the steps comprising directing the workpiece part way around a hollow roll in engagement therewith throughout an arc of not more than 90*, simultaneously returning the strip in the opposite direction part way around the opposite side of said roll in engagement therewith, and subjecting the roll to radial vibrations in all directions at an ultrasonic frequency.
Claim 11
Dependent Claim
67 words
In the method of roller leveling or straightening a longitudinally moving elongated metal workpiece by reversely bending it, the steps comprising directing the workpiece part way around a hollow roll in engagement therewith throughout an arc of not more than 90*, supporting the roll at points diametrically opposite the ends of said arc, and subjecting the roll to radial vibrations in all directions at an ultrasonic frequency.
Claim 12
Dependent Claim
67 words
In the method of roller leveling or straightening a longitudinally moving elongated metal workpiece by reversely bending it, the steps comprising directing the workpiece part way around a hollow roll in engagement therewith throughout an arc of not more than 90*, supporting the roll at points diametrically opposite the ends of said arc, and subjecting the roll to radial vibrations in all directions at an ultrasonic frequency.
Claim 13
Dependent Claim
68 words
In the method of roller leveling or straightening a longitudinally moving elongated metal workpiece by reversely bending it, the steps comprising directing the workpiece part way around a hollow roll in engagement therewith through an arc of not more than 90*, and vibrating the roll radially at an ultrasonic frequency, the roll having a diameter and wall thickness that provides bell mode resonance when vibrated at said frequency.
Claim 14
Dependent Claim
68 words
In the method of roller leveling or straightening a longitudinally moving elongated metal workpiece by reversely bending it, the steps comprising directing the workpiece part way around a hollow roll in engagement therewith through an arc of not more than 90*, and vibrating the roll radially at an ultrasonic frequency, the roll having a diameter and wall thickness that provides bell mode resonance when vibrated at said frequency.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |