US5143578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for engraving solid articles with laser beams
Assignee: Praxair ST Technology Inc
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Filing: 1990-08-07
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Granted: 1992-09-01
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Expires: 2010-08-07
Abstract
Abstract A method for engraving a series of consecutive cells in a solid surface, such as a liquid transfer surface, by impinging on the surface a pulsed laser beam in which the pulses of the laser beam are formed in a series of consecutive groups of two or more consecutive pulses and each of said groups form an individual cell in the solid surface. The article produced is also described.
Inventors
- 👤 Pierre Luthi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:58
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/08; B23K26/0823; B41; B41C; B41C1/00; B41C1/02; B41C1/04; B41C1/05; B41N; B41N7/00; B41N7/06; B21; B21B; B21B27/00; B21B27/005; B41N2207/00; B41N2207/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
187 words
A method for engraving a series of consecutive cells in at least a portion of a solid surface of a liquid transfer roll by impinging on the solid surface a pulsed laser beam in relative motion with said surface and wherein the pulses of the laser beam are formed in a series of consecutive groups with each group comprising two or more consecutive spaced-apart and non-concentric pulses and wherein each group impinging said solid surfaces forms an individual cell in said solid surface with each cell being a basin shaped cell having a substantially oval opening with a major diameter axis and a minor diameter axis intersecting at a center axis point of the cell; said cells are formed and aligned in the surface of the roll in substantially parallel rows perpendicular to the longitudinal axis of the roll, and a line drawn through the center axis point of a cell in a row and the central axis point of an adjacent cell in an adjacent row forms an angle of between 0° and 60° with a line drawn parallel to the longitudinal axis of the roll.
Claim 2
Independent Claim
187 words
A method for engraving a series of consecutive cells in at least a portion of a solid surface of a liquid transfer roll by impinging on the solid surface a pulsed laser beam in relative motion with said surface and wherein the pulses of the laser beam are formed in a series of consecutive groups with each group comprising two or more consecutive spaced-apart and non-concentric pulses and wherein each group impinging said solid surfaces forms an individual cell in said solid surface with each cell being a basin shaped cell having a substantially oval opening with a major diameter axis and a minor diameter axis intersecting at a center axis point of the cell; said cells are formed and aligned in the surface of the roll in substantially parallel rows perpendicular to the longitudinal axis of the roll, and a line drawn through the center axis point of a cell in a row and the central axis point of an adjacent cell in an adjacent row forms an angle of between 0° and 60° with a line drawn parallel to the longitudinal axis of the roll.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the angle is between 30° and 60°.
Claim 4
Dependent Claim
11 words
The method of claim 2 wherein the angle is about 45°.
Claim 5
Dependent Claim
89 words
The method of claim 3 wherein the cells are formed and aligned in the liquid transfer roll in substantially parallel rows perpendicular to the longitudinal axis of the roll and positioned such that a length of the non-engraved spaced between two cells in a row along a line containing their major diameter axis is between 1 and 1.3 times the length of the non-engraved space between one of said adjacent cells and a cell in an adjacent row along a line containing the center axis point of the cells.
Claim 6
Dependent Claim
61 words
The method of claim 4 wherein the length of the non-engraved spacing between the two cells is a row along a line containing their major diameter axis is substantially equal to the length of the non-engraved space between one of said adjacent cells and a cell in an adjacent row along a line containing the center axis point of the cells.
Claim 7
Dependent Claim
16 words
The method of claim 1 wherein the cells are formed substantially equal distance from each other.
Claim 8
Dependent Claim
16 words
The method of claim 1 wherein at least a portion of said groups comprises two pulses.
Claim 9
Dependent Claim
16 words
The method of claim 1 wherein at least a portion of said groups comprises three pulses.
Claim 10
Dependent Claim
16 words
The method of claim 1 wherein at least a portion of said groups comprising four pulses.
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) | 1995-09-01 | 1996-03-02 | 1996-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-01 | 2000-03-02 | 2000-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-01 | 2004-03-02 | 2004-09-01 | $7700.00 | Window Closed / Lapsed |