US4467168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cutting glass with a laser and an article made therewith
Assignee: CREATIVE GLASSWORKS INTERNATIONAL 506 N B ST FAIRFIELD IA A CORP OF IA
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Filing: 1981-04-01
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Granted: 1984-08-21
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Expires: 2001-04-01
Abstract
Abstract A method of cutting glass with a laser. The glass is superposed a suitable support and a laser beam is directed onto the glass. The laser beam is focused to a point disposed at or about the surface of the glass. The focused laser beam vaporizes a first thickness of glass, less than the entire thickness, and simultaneously heats the remaining thickness above the annealing temperature of the glass. A jet of gas incident upon the laser focal point removes the heated and vaporized glass proximate the focal point to create a hole through the glass. By effecting movement between the glass and the laser and gas jet at a predetermined rate, the glass is cut. Also disclosed is an article including a unitary first sheet of glass having at least one complimental opening of predetermined configuration that does not extend to the edge of the glass and is cut by a laser. One or more complimentary glass inserts coplanar with the first glass are disposed within the opening of the first glass, defining a groove therebetween. A securing means is disposed in the groove to secure the complimentary pieces of glass in fixed edge to edge relationship.
Inventors
- 👤 George M. Morgan
- 👤 Dale R. Hinkens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:11
CPC Classifications
C; C03; C03B; C03B33/00; C03B33/08; C03B33/082; C03B33/02; C03B33/023; C03B33/027; C03B33/04
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
217 words
Method of cutting glass having a predetermined thickness with laser means having a laser beam output, said method comprising superposing the glass in predetermined spaced relationship with respect to a support means; directing laser means so that a laser beam generated thereby is incident upon said glass, said laser means having a predetermined energy output; focusing said laser beam to a focal point proximate the surface of said glass to locally heat said glass proximate said focal point; vaporizing a first thickness of said glass proximate said laser focal point, said first thickness being less than the total glass thickness; simultaneously with said vaporizing, heating the remaining thickness of said glass proximate said laser focal point, said remaining thickness being heated above its annealing temperature; directing a jet of gas so that it is incident upon the proximity of said laser focal point, said jet cooperating with said beam to remove said vaporized and said heated glass proximate said laser focal point to create a hole through said glass; and effecting movement between said glass and said laser focal point and gas jet along a predetermined path at a predetermined rate, maintaining said focal point at or about the surface of said glass during any movement, thereby defining a cut through the entire thickness of said glass.
Claim 2
Dependent Claim
217 words
Method of cutting glass having a predetermined thickness with laser means having a laser beam output, said method comprising superposing the glass in predetermined spaced relationship with respect to a support means; directing laser means so that a laser beam generated thereby is incident upon said glass, said laser means having a predetermined energy output; focusing said laser beam to a focal point proximate the surface of said glass to locally heat said glass proximate said focal point; vaporizing a first thickness of said glass proximate said laser focal point, said first thickness being less than the total glass thickness; simultaneously with said vaporizing, heating the remaining thickness of said glass proximate said laser focal point, said remaining thickness being heated above its annealing temperature; directing a jet of gas so that it is incident upon the proximity of said laser focal point, said jet cooperating with said beam to remove said vaporized and said heated glass proximate said laser focal point to create a hole through said glass; and effecting movement between said glass and said laser focal point and gas jet along a predetermined path at a predetermined rate, maintaining said focal point at or about the surface of said glass during any movement, thereby defining a cut through the entire thickness of said glass.
Claim 3
Dependent Claim
18 words
A method of cutting glass as in claim 1 further comprising selectively controlling said laser means energy output.
Claim 4
Dependent Claim
221 words
An article of manufacture comprising glass having at least one cut of predetermined configuration and length, each cut having been made by superposing the glass in predetermined spaced relationship with respect to a support means; directing laser means so that a laser beam generated thereby is incident upon said glass, said laser means having a predetermined energy output; focusing said laser beam to a focal point proximate the surface of said glass to locally heat said glass proximate said focal point; vaporizing a first thickness of said glass proximate said laser focal point, said first thickness being less than the total glass thickness; simultaneously with said vaporizing, heating the remaining thickness of said glass proximate said laser focal point, said remaining thickness being heated above its annealing temperature; directing a jet of gas so that it is incident upon the proximity of said laser focal point, said jet cooperating with said beam to remove said vaporized and said heated glass proximate said laser focal point to create a hole through said glass; and effecting movement between said glass and said laser focal point and said gas jet along a predetermined path at a predetermined rate, maintaining said focal point at or about the surface of said glass during any movement, thereby defining a cut through the entire thickness of said glass.
Claim 5
Dependent Claim
221 words
An article of manufacture comprising glass having at least one cut of predetermined configuration and length, each cut having been made by superposing the glass in predetermined spaced relationship with respect to a support means; directing laser means so that a laser beam generated thereby is incident upon said glass, said laser means having a predetermined energy output; focusing said laser beam to a focal point proximate the surface of said glass to locally heat said glass proximate said focal point; vaporizing a first thickness of said glass proximate said laser focal point, said first thickness being less than the total glass thickness; simultaneously with said vaporizing, heating the remaining thickness of said glass proximate said laser focal point, said remaining thickness being heated above its annealing temperature; directing a jet of gas so that it is incident upon the proximity of said laser focal point, said jet cooperating with said beam to remove said vaporized and said heated glass proximate said laser focal point to create a hole through said glass; and effecting movement between said glass and said laser focal point and said gas jet along a predetermined path at a predetermined rate, maintaining said focal point at or about the surface of said glass during any movement, thereby defining a cut through the entire thickness of said glass.
Claim 6
Dependent Claim
13 words
An article as in claim 1 wherein said glass is a unitary sheet.
Claim 7
Dependent Claim
27 words
An article as in claim 3 or claim 4 wherein at least one cut is within the perimeter of said glass without extending to an edge thereof.
Claim 8
Dependent Claim
36 words
An article as in claim 3 or claim 4 wherein at least one cut begins at one location within the perimeter of said glass and terminates at a different location within the perimeter of said glass.
Claim 9
Dependent Claim
37 words
An article as in claim 3 or claim 4 wherein at least one cut begins and terminates at the same location within the perimeter of said glass, said cut defining at least one opening in said glass.
Claim 10
Dependent Claim
128 words
An article of manufacture comprising a first unitary sheet of glass defining at least one complimental opening of predetermined configuration that does not extend to the edge of said sheet of glass, said opening created by cutting said glass with laser means; at least one second sheet of glass coplanar with said first sheet and disposed within at least one of said complimental openings of said first sheet, said second sheet substantially complimentary to said opening in said first sheet, said opening of said first sheet and the periphery of said second sheet defining a groove therebetween; and securing means disposed substantially within said groove between said first sheet and said second sheet for securing in fixed edge to edge relationship said first sheet and said second sheet.
Claim 11
Dependent Claim
128 words
An article of manufacture comprising a first unitary sheet of glass defining at least one complimental opening of predetermined configuration that does not extend to the edge of said sheet of glass, said opening created by cutting said glass with laser means; at least one second sheet of glass coplanar with said first sheet and disposed within at least one of said complimental openings of said first sheet, said second sheet substantially complimentary to said opening in said first sheet, said opening of said first sheet and the periphery of said second sheet defining a groove therebetween; and securing means disposed substantially within said groove between said first sheet and said second sheet for securing in fixed edge to edge relationship said first sheet and said second sheet.
Claim 12
Dependent Claim
28 words
An article as in claim 8 wherein said second sheet of glass comprises a plurality of coplanar sheets of glass secured together in fixed edge to edge relationship.
Claim 13
Dependent Claim
17 words
An article as in claim 8 or claim 9 wherein said securing means comprises a photopolymer material.
Claim 14
Dependent Claim
14 words
An article as in claim 10 wherein said epoxy is curable by ultraviolet radiation.
Claim 15
Dependent Claim
15 words
An article as in claim 8 or claim 9 wherein said securing means is metallic.
Claim 16
Dependent Claim
24 words
The method of claim 1 wherein the step of directing laser means comprises orienting the laser beam to be substantially perpendicular to the glass.
Claim 17
Dependent Claim
23 words
The method of claim 1 wherein the step of directing laser means further comprises generating a laser beam having a multi-mode energy distribution.
Claim 18
Dependent Claim
24 words
The method of claim 1 wherein the step of directing laser means further comprises generating a laser beam having a single mode energy distribution.
Claim 19
Dependent Claim
28 words
The method of claim 1 wherein the step of vaporizing a first thickness of said glass comprises vaporizing approximately 5 to 30 percent of the total glass thickness.
Claim 20
Dependent Claim
24 words
The method of claim 1 wherein the step of directing a jet of gas comprises directing the jet of gas downwardly onto the glass.
Claim 21
Dependent Claim
29 words
The method of claim 1 wherein the step of directing a jet of gas comprises directing the jet of gas substantially parallel to and coincident with said laser beam.
Claim 22
Dependent Claim
37 words
The method of claim 1 wherein the step of effecting movement between said glass and said laser focal point and gas jet comprises moving said sheet of glass while the laser means and gas jet are stationary.
Claim 23
Dependent Claim
37 words
The method of claim 1 wherein said step of effecting movement between said glass and said laser focal point and gas jet comprises moving said laser means and gas jet while said sheet of glass is stationary.
References Cited (Backward Citations)
US3930825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |