US3685711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tension adjuster for slit metal sheets
Assignee: Compagnie des Ateliers et Forges de la Loire SA
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Filing: 1970-09-08
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Granted: 1972-08-22
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Expires: 1990-09-08
Abstract
Abstract This device for adjusting the tension of an initially tensionless sheet consisting of a plurality of slit strips in a sheet-mill, so that the tension applied to said sheet is distributed in a manner substantially proportional to the width of each slit strip, the speeds of said slit strips differing slightly from one another.
Inventors
- 👤 Pierre Andre Gay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:13
CPC Classifications
B; B23; B23D; B23D19/00; B21; B21C; B21C47/00; B21C47/003; B21C47/006
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
161 words
A device for adjusting the tension of slit strips comprising on the one hand a pair of guide rolls having shafts, one of said rolls comprising rings secured in an adjustable position on its shaft, said rings having radial notches formed therein, the other of said rolls comprising rings slipped on its shaft each provided with a disk coacting with one of said notches of said first named roll, the gap left between said two rolls having the shape of a sequence of rectangles constituting the cross-sectional contours of the slit strips, said rolls being driven to have a substantially zero relative speed in relation to the strip and, on the other hand a pair of braking rolls comprising a series of stacked rings, which are friction driven independently of each other from a shaft rotatably driven at a speed so that if the rings do not slip on their friction surfaces their peripheral speed is inferior to the strip speed.
Claim 2
Independent Claim
161 words
A device for adjusting the tension of slit strips comprising on the one hand a pair of guide rolls having shafts, one of said rolls comprising rings secured in an adjustable position on its shaft, said rings having radial notches formed therein, the other of said rolls comprising rings slipped on its shaft each provided with a disk coacting with one of said notches of said first named roll, the gap left between said two rolls having the shape of a sequence of rectangles constituting the cross-sectional contours of the slit strips, said rolls being driven to have a substantially zero relative speed in relation to the strip and, on the other hand a pair of braking rolls comprising a series of stacked rings, which are friction driven independently of each other from a shaft rotatably driven at a speed so that if the rings do not slip on their friction surfaces their peripheral speed is inferior to the strip speed.
Claim 3
Independent Claim
113 words
A device for adjusting the tension of slit strips comprising a pair of guide rolls provided with adapters capable of giving to the gap left between said two rolls substantially the shape of a sequence of rectangles reproducing the succession of rectangles constituting the cross-sectional contours of the slit strips, said rolls being driven to have a substantially zero relative speed in relation to the strip and a pair of braking rolls having a series of stacked rings frictionally driven independently of each other from a shaft rotatably driven at a speed so that if the rings do not slip on their friction surfaces their peripheral speed is inferior to the strip speed.
Claim 4
Independent Claim
113 words
A device for adjusting the tension of slit strips comprising a pair of guide rolls provided with adapters capable of giving to the gap left between said two rolls substantially the shape of a sequence of rectangles reproducing the succession of rectangles constituting the cross-sectional contours of the slit strips, said rolls being driven to have a substantially zero relative speed in relation to the strip and a pair of braking rolls having a series of stacked rings frictionally driven independently of each other from a shaft rotatably driven at a speed so that if the rings do not slip on their friction surfaces their peripheral speed is inferior to the strip speed.
Claim 5
Dependent Claim
54 words
A device as set forth in claim 2, wherein said stacked rings comprise a first series of rings stacked oN their shafts rotatably driven therefrom but adapted to move axially, and a second series of rings alternating with said first series of rings adapted to rotate and move axially in relation to their shaft.
Claim 6
Dependent Claim
21 words
A device as set forth in claim 3, wherein said braking rolls are pressed against each other by a fluid-actuated cylinder.
Claim 7
Dependent Claim
22 words
A device as set forth in claim 3, wherein fluid-actuated cylinders are connected to said stacked rings to adjust the braking force.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |