US3888048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for removing scale from metal sheets
Assignee: Individual
•
Filing: 1973-07-23
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Granted: 1975-06-10
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Expires: 1993-07-23
Abstract
Abstract A method and apparatus are provided for removing scale from hot rolled steel sheets or strips by abrasion. Specifically, a roll comprising a hub with a multiplicity of generally radially extending flexible sheets is rotated at high speed, with the outer edges of the sheets in contact with the steel sheet passing thereby. Back-up rolls are provided for the abrasive rolls with two being used for thicker steel sheets and a single roll used for thinner sheets. The abrasive rolls and/or the back-up rolls are designed to be immediately retracted when the steel sheet is stopped, with the extent of retraction of the rolls being adjustable. When the sheet is stopped and before it is started again, it is reversed in direction a short distance to provide a slight overlap of the contact of the abrasive rolls with the steel sheet. The abrasive rolls are also oscillated slowly back and forth during operation to provide more uniform wear.
Inventors
- 👤 Ford B Cauffiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:13
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/10; B24B7/12; B24B7/13; B21; B21B; B21B45/00; B21B45/04; B21B45/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
196 words
The method of removing scale from a steel sheet comprising moving said sheet in a given direction into contact with outer edge portions of a multiplicity of flexible sheets having abrasive surfaces while rotating said flexible sheets with their outer edges in a substantially circular path at high speed, supporting said steel sheet in contact with said flexible sheets through rotatable supports positioned on the side of said steel sheet opposite said flexible sheets, repeating the process on the opposite side of said steel sheet, stopping movement of said steel sheet in the given direction, substantially simultaneously separating said steel sheet from said flexible sheets by moving at least one of said steel sheet and said flexible sheets in a direction transverse to the steel sheet, moving said steel sheet in a direction opposite to the given direction to position a portion of the steel sheet previously in contact with the abrasive shEets near said abrasive sheets, again moving said steel sheet in contact with said flexible sheets so that said flexible sheets contact a portion of said steel sheet previously contacted by said flexible sheets, and again moving the steel sheet in the given direction.
Claim 2
Independent Claim
196 words
The method of removing scale from a steel sheet comprising moving said sheet in a given direction into contact with outer edge portions of a multiplicity of flexible sheets having abrasive surfaces while rotating said flexible sheets with their outer edges in a substantially circular path at high speed, supporting said steel sheet in contact with said flexible sheets through rotatable supports positioned on the side of said steel sheet opposite said flexible sheets, repeating the process on the opposite side of said steel sheet, stopping movement of said steel sheet in the given direction, substantially simultaneously separating said steel sheet from said flexible sheets by moving at least one of said steel sheet and said flexible sheets in a direction transverse to the steel sheet, moving said steel sheet in a direction opposite to the given direction to position a portion of the steel sheet previously in contact with the abrasive shEets near said abrasive sheets, again moving said steel sheet in contact with said flexible sheets so that said flexible sheets contact a portion of said steel sheet previously contacted by said flexible sheets, and again moving the steel sheet in the given direction.
Claim 3
Dependent Claim
179 words
Apparatus for removing scale from a metal sheet, said apparatus comprising a hub, a multiplicity of flexible sheets extending generally radially from said hub, each of said flexible sheets having an abrasive surface facing in a common direction, means for rotating said hub at a high speed in the common direction, means for supporting the metal sheet in contact with outer edge portions of said flexible sheets, means for moving said metal sheet in a given direction between said flexible sheets and said supporting means, said supporting means comprising two back-up rolls having axes parallel to the axis of said hub and located symmetrically on opposite sides of a vertical plane extending through the axis of said hub, and positioned to engage the metal sheet at the same time and to support it in contact with the outer edge portions of said flexible sheets, an additional back-up roll, and means for mounting said additional back-up roll with its axis in the plane extending through the axis of said hub and spaced toward said hub from said two back-up rolls.
Claim 4
Dependent Claim
179 words
Apparatus for removing scale from a metal sheet, said apparatus comprising a hub, a multiplicity of flexible sheets extending generally radially from said hub, each of said flexible sheets having an abrasive surface facing in a common direction, means for rotating said hub at a high speed in the common direction, means for supporting the metal sheet in contact with outer edge portions of said flexible sheets, means for moving said metal sheet in a given direction between said flexible sheets and said supporting means, said supporting means comprising two back-up rolls having axes parallel to the axis of said hub and located symmetrically on opposite sides of a vertical plane extending through the axis of said hub, and positioned to engage the metal sheet at the same time and to support it in contact with the outer edge portions of said flexible sheets, an additional back-up roll, and means for mounting said additional back-up roll with its axis in the plane extending through the axis of said hub and spaced toward said hub from said two back-up rolls.
Claim 5
Dependent Claim
182 words
Apparatus for removing scale from a metal sheet, said apparatus comprising means for directing the metal sheet along a predetermined path, an upper abrasive roll located above said path and positioned to contact an upper surface of the metal sheet when moving along the path, at least one back-up roll positioned on the side of the path opposite said abrasive roll to support the sheet in contact with said upper abrasive roll, means for rotating said abrasive roll at high speed, a lower abrasive roll located below the path and positioned to contact a lower surface of the sheet when moving along the path, at least one additional back-up roll located on the side of the path opposite said lower abrasive roll to support the sheet in contact with the lower abrasive roll, means for rotating said lower abrasive roll at high speed, means for engaging said metal sheet on the same side thereof as said lower abrasive roll, and means for raising said engaging means when the metal sheet is stopped to separate the metal sheet from said lower abrasive roll.
Claim 6
Dependent Claim
182 words
Apparatus for removing scale from a metal sheet, said apparatus comprising means for directing the metal sheet along a predetermined path, an upper abrasive roll located above said path and positioned to contact an upper surface of the metal sheet when moving along the path, at least one back-up roll positioned on the side of the path opposite said abrasive roll to support the sheet in contact with said upper abrasive roll, means for rotating said abrasive roll at high speed, a lower abrasive roll located below the path and positioned to contact a lower surface of the sheet when moving along the path, at least one additional back-up roll located on the side of the path opposite said lower abrasive roll to support the sheet in contact with the lower abrasive roll, means for rotating said lower abrasive roll at high speed, means for engaging said metal sheet on the same side thereof as said lower abrasive roll, and means for raising said engaging means when the metal sheet is stopped to separate the metal sheet from said lower abrasive roll.
Claim 7
Dependent Claim
184 words
Apparatus for removing scale from a metal sheet, said apparatus comprising means for directing the metal sheet along a predetermined path, an upper abrasive roll located above said path and positioned to contact an upper surface of the metal sheet when moving along the path, at least one back-up roll positioned on the side of the path opposite said abrasive roll to support the sheet in contact with said upper abrasive roll, means for rotating said abrasive roll at high speed, a lower abrasive roll located below the path and positioned to contact a lower surface of the sheet when moving along the path, at least one additional back-up roll located on the side of the path opposite said lower abrasive roll to support the sheet in contact with the lower abrasive roll, means for rotating said lower abrasive roll at high speed, means for moving said upper and lower rolls back and forth substantially axially and in opposite directions, and means engageable with opposite edge portions of the metal sheet to control the length of axial movement of said upper and lower rolls.
Claim 8
Dependent Claim
184 words
Apparatus for removing scale from a metal sheet, said apparatus comprising means for directing the metal sheet along a predetermined path, an upper abrasive roll located above said path and positioned to contact an upper surface of the metal sheet when moving along the path, at least one back-up roll positioned on the side of the path opposite said abrasive roll to support the sheet in contact with said upper abrasive roll, means for rotating said abrasive roll at high speed, a lower abrasive roll located below the path and positioned to contact a lower surface of the sheet when moving along the path, at least one additional back-up roll located on the side of the path opposite said lower abrasive roll to support the sheet in contact with the lower abrasive roll, means for rotating said lower abrasive roll at high speed, means for moving said upper and lower rolls back and forth substantially axially and in opposite directions, and means engageable with opposite edge portions of the metal sheet to control the length of axial movement of said upper and lower rolls.
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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) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |