Patent US4806731A successfully refreshed from Google Patents.
US4806731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for marking the surface of a rolling mill
Assignee: Individual
•
Filing: 1988-02-23
•
Granted: 1989-02-21
•
Expires: 2008-02-23
Abstract
Abstract A rolling mill is rotated while microscopic dents with peripheral ridges are formed by an intermittent laser beam in the presence of a gas jet directed at the beam impact zone. The output and the angle of incidence of the gas jet are controlled and microscopic dents are formed with a ridge on only part of their periphery. Steel sheet cold-rolled by means of such a roll has uniformly distributed hollows, each hollow partially surrounding an elevation.
Inventors
- 👤 Adolphe Bragard
- 👤 Jacques Halleux
- 👤 Frederic Terreur
- 👤 Jacques Defourny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:45
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/38; B; B21; B21B; B21B27/00; B21B27/005; B23; B23K; B23K26/00; B23K26/08; B23K26/0823; B23K26/12; B23K26/123; B23K26/14; B23K26/142; B23K26/1435; B23K26/1437; B23K26/1438; B23K26/352; B23K26/355; B23K26/3568; B23K26/3584; B44; B44B; B44B3/00; B44B3/04; B44B7/00; B21B2267/00; B21B2267/10; B23K2103/00; B23K2103/02; B23K2103/04; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12993
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
102 words
A process for marking the surface of a rolling mill roll having a longitudinal axis, comprising the steps of rotating the roll about its longitudinal axis and forming a multitude of microscopic dents are formed in the surface of the said roll by means of an intermittent laser beam in the presence of a gas jet directed at an impact zone of the said laser beam, each microscopic dent giving rise to a ridge, and controlling the output and the angle of incidence of the gas jet, whereby microscopic dents are formed with a ridge on only a part of their periphery.
Claim 2
Dependent Claim
102 words
A process for marking the surface of a rolling mill roll having a longitudinal axis, comprising the steps of rotating the roll about its longitudinal axis and forming a multitude of microscopic dents are formed in the surface of the said roll by means of an intermittent laser beam in the presence of a gas jet directed at an impact zone of the said laser beam, each microscopic dent giving rise to a ridge, and controlling the output and the angle of incidence of the gas jet, whereby microscopic dents are formed with a ridge on only a part of their periphery.
Claim 3
Dependent Claim
14 words
A process according to claim 1, wherein a gas jet comprises a non-oxidising gas.
Claim 4
Dependent Claim
14 words
A process according to claim 2, wherein the non-oxidising gas is a reducing gas.
Claim 5
Dependent Claim
29 words
A process according to claim 1, including aligning the said gas jet in a direction substantially perpendicular to the generatrix of the roll passing over the said impact zone.
Claim 6
Dependent Claim
19 words
A process according to claim 4, including injecting the said gas in the direction of rotation of the roll.
Claim 7
Dependent Claim
43 words
A process according to claim 1, wherein the ratio L/D between the dimension L of the microscopic dents, measured along the periphery of the roll, and their dimension D, measured parallel to the longitudinal axis of the roll, is between 1 and 5.
Claim 8
Dependent Claim
15 words
A process according to claim 6, wherein the ratio L/D is between 1.1 and 2.5.
Claim 9
Dependent Claim
49 words
A process according to claim 1, including heating the ridge together with the portion of the roll surface on which the ridge is disposed, to a temperature sufficient to bring about the start of melting and the welding of the ridge to the said portion of the roll surface.
Claim 10
Dependent Claim
27 words
A process according to claim 8, wherein said heating is implemented by means of a second laser beam or a deviated part of the intermittent laser beam.
Claim 11
Dependent Claim
44 words
A rolling mill roll with a surface having a multitude of microscopic dents formed by means of an intermittent laser beam, according to the process of claim 1, wherein the microscopic dents are provided with a ridge on only a part of their periphery.
Claim 12
Dependent Claim
53 words
A rolling mill roll according to claim 10, wherein the ratio L/D between the dimension L of the microscopic dents, measured along the periphery of the roll, and their dimension D, measured parallel to the longitudinal axis of the roll, has a value of between 1 and 5, preferably between 1.1 and 2.5.
Claim 13
Dependent Claim
32 words
A steel sheet cold-rolled by means of a roll according to claim 10, wherein the surface of the sheet has a multitude of uniformly distributed hollows, each hollow partially surrounding an elevation.
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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |