US3680343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for leveling thin strip
Assignee: Allegheny Ludlum Corp
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Filing: 1970-03-05
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Granted: 1972-08-01
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Expires: 1990-03-05
Abstract
Abstract Apparatus for removing coil set, and dish, from thin gauge strip, such as electrical grade, hard temper steel, having a combination of rolls including a first pair of stacked rolls, one of which is substantially cylindrical in shape and the other of which is slightly concave so that passage of the material through the first pair of rolls will affect a slight elongation of the material at its edges. The apparatus contains a second group of rolls consisting of a cluster of staggered, or offset rolls of substantially cylindrical shape, whereby a workpiece passing therethrough is alternately flexed in opposite directions away from a straight pass line through the apparatus.
Inventors
- 👤 Cecil W Singleton
- 👤 Richard P Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:15
CPC Classifications
B; B21; B21D; B21D1/00; B21D1/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
190 words
Apparatus for leveling metallic strip material comprising two stacked work rolls carried in chocks at their opposite ends and defining a roll bite therebetween through which metallic strip material passes as it travels along an essentially straight-line path of travel, means exerting forces on said chocks at essentially right angles to said straight-line path of travel to maintain said chocks in essentially fixed positions as strip material passes therebetween, one of said rolls having a true cylindrical shape and the other having a concave shape whereby the roll force exerted by said rolls will be greater at the edges of the strip material than at the center thereof, a cluster of three rolls through which said strip material passes after passing through said two stacked rolls, two of said three cluster rolls being on one side of the strip material and the third being on the other side between the first two, and means for forcing said third roll toward the other two whereby the strip material is caused to flex first in one direction and then in the other as it passes over the periphery of said third roll.
Claim 2
Dependent Claim
190 words
Apparatus for leveling metallic strip material comprising two stacked work rolls carried in chocks at their opposite ends and defining a roll bite therebetween through which metallic strip material passes as it travels along an essentially straight-line path of travel, means exerting forces on said chocks at essentially right angles to said straight-line path of travel to maintain said chocks in essentially fixed positions as strip material passes therebetween, one of said rolls having a true cylindrical shape and the other having a concave shape whereby the roll force exerted by said rolls will be greater at the edges of the strip material than at the center thereof, a cluster of three rolls through which said strip material passes after passing through said two stacked rolls, two of said three cluster rolls being on one side of the strip material and the third being on the other side between the first two, and means for forcing said third roll toward the other two whereby the strip material is caused to flex first in one direction and then in the other as it passes over the periphery of said third roll.
Claim 3
Dependent Claim
29 words
The apparatus of claim 1 wherein all of said recited rolls have a nominal diameter of less than one inch, the diameters of all rolls being essentially the same.
Claim 4
Dependent Claim
57 words
The apparatus of claim 2 wherein said third cluster roll is mounted on a rocker arm pivotal about a shaft extending transverse to the direction of strip movement through said rolls, and means between said shaft and said third cluster roll for forcinG said rocker arm and said third cluster roll toward said first two cluster rolls.
Claim 5
Dependent Claim
19 words
The apparatus of claim 1 wherein said strip material is engaged by said work rolls in essentially line contact.
References Cited (Backward Citations)
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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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |