US3928013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the direct manufacture of tempered glass sheets from a ribbon of glass
Assignee: Cyclops Corp
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Filing: 1974-05-17
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Granted: 1975-12-23
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Expires: 1994-05-17
Abstract
Abstract The present invention is directed to an improved method of manufacturing tempered glass sheets on a continuous basis from a band drawn from a melt, and to an improved method of cutting bands of hot glass. The method is characterized by subjecting a continuous ribbon or band of glass emerging from a glass fabricating furnace or from the terminal stages of a float process, the glass being at a temperature suitably high for subsequent tempering, e.g., preferably at or near the annealing point, to a cutting procedure involving drawing a scoring implement pressed against the surface of the band transversely across the band, the tip portion of the scoring implement being continuously supplied with limited quantities of a liquid, the quantities being sufficient to flow or be drawn into the minute fissures formed by the scoring implement but not so great as to flow or engage to any significant extent glass portions beyond the score line. The thus scored glass, preferably promptly after the formation of the score, is flexed about a bending axis coincident with the score to separate the increments of the band along the score line, the separated increment being thereafter subjected to quenching influences.
Inventors
- 👤 Walter K French
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:58
CPC Classifications
C; C03; C03B; C03B21/00; C03B27/00; C03B27/012; C03B27/04; C03B27/044; C03B29/00; C03B29/04; C03B29/06; C03B29/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
THE PROCESS FOR THE FORMATION OF DISCRETE SHEETS OF TEMPERED GLASS DIRECTLY FROM A FLAT, CONTINUOUS BAND OF GLASS WITHDRAW FROM A MELT, SAID BAND BEING AT A TEMPERATURE BELOW THE SOFTENING POINT, ABOVE THE STRAIN RELIEF POINT, AND PREFERABLY IN THE RANGE OF THE ANNEALING POINT, COMPRISING THE STEPS OF FORMING A SCORE LINE BY DRAWING A SCORING IMPLEMENT PRESSED AGAINST A SURFACE OF SAID SHEET TRANSVERSELY ACROSS SAID SHEET WHILE CONTINUOUSLY SUPPLYING TO THE GLASS ENGAGING TIP OF SAID IMPLEMENT LIMITED QUANTITIES OF LIQUID, SAID LIQUID BEING SUPPLIED AT A RATE TO PREVENT LATERAL FLOW SUBSTANTIALLY BEYOND THE PATH OF SAID SCORE LINE, THUS TO DEFINE A SCORE LINE INCLUDING DEPTHWISELY EXTENDING FISSURES INTO WHICH INCREMENTS OF SAID LIQUID HAVE BEEN DRAW, THEREAFTER FLEXINF SAI BAND ABOUT A BENDING AXIS EXTENDING THROUGH SAID SCORE LINE, THUS TO BREAK SAID BAND ALONG SAID LINE AND SEVER AN INCREMENT FROM SAID BAND, AND THEREAFTER SEPARATING SAID SEVERED INCREMENT FROM SAID BAND AND SUBJECTING THE TO QUENCHING INFLUENCE TO TEMPER THE INCREMENT.
Claim 2
Dependent Claim
171 words
THE PROCESS FOR THE FORMATION OF DISCRETE SHEETS OF TEMPERED GLASS DIRECTLY FROM A FLAT, CONTINUOUS BAND OF GLASS WITHDRAW FROM A MELT, SAID BAND BEING AT A TEMPERATURE BELOW THE SOFTENING POINT, ABOVE THE STRAIN RELIEF POINT, AND PREFERABLY IN THE RANGE OF THE ANNEALING POINT, COMPRISING THE STEPS OF FORMING A SCORE LINE BY DRAWING A SCORING IMPLEMENT PRESSED AGAINST A SURFACE OF SAID SHEET TRANSVERSELY ACROSS SAID SHEET WHILE CONTINUOUSLY SUPPLYING TO THE GLASS ENGAGING TIP OF SAID IMPLEMENT LIMITED QUANTITIES OF LIQUID, SAID LIQUID BEING SUPPLIED AT A RATE TO PREVENT LATERAL FLOW SUBSTANTIALLY BEYOND THE PATH OF SAID SCORE LINE, THUS TO DEFINE A SCORE LINE INCLUDING DEPTHWISELY EXTENDING FISSURES INTO WHICH INCREMENTS OF SAID LIQUID HAVE BEEN DRAW, THEREAFTER FLEXINF SAI BAND ABOUT A BENDING AXIS EXTENDING THROUGH SAID SCORE LINE, THUS TO BREAK SAID BAND ALONG SAID LINE AND SEVER AN INCREMENT FROM SAID BAND, AND THEREAFTER SEPARATING SAID SEVERED INCREMENT FROM SAID BAND AND SUBJECTING THE TO QUENCHING INFLUENCE TO TEMPER THE INCREMENT.
Claim 3
Dependent Claim
12 words
The method in accordance with claim 1 wherein said liquid comprises water.
Claim 4
Dependent Claim
15 words
The method in accordance with claim 2 wherein said water includes a dissolved organic material.
Claim 5
Dependent Claim
15 words
The method in accordance with claim 2 wherein said liquid includes a dissolved inorganic material.
Claim 6
Dependent Claim
27 words
The method in accordance with claim 1 wherein said liquid comprises a colloidal suspension of particles having a size smaller than the transverse dimension of said fissures.
Claim 7
Independent Claim
108 words
The method of cutting glass while the glass is at a temperature between the softening point and the strain relief point which comprises the steps of pressing a scoring implement against the surface of said glass while drawing said scoring implement transversely across said surface to form a score, the glass contacting portion of said scoring implement being continuously supplied with a limited quantity of liquid, thus to form a score line including depthwisely extending fissures into which increments of said liquid have been drawn, and thereafter flexing said scored glass about a bending axis extending through said score line, thus to break said glass along said line.
Claim 8
Independent Claim
108 words
The method of cutting glass while the glass is at a temperature between the softening point and the strain relief point which comprises the steps of pressing a scoring implement against the surface of said glass while drawing said scoring implement transversely across said surface to form a score, the glass contacting portion of said scoring implement being continuously supplied with a limited quantity of liquid, thus to form a score line including depthwisely extending fissures into which increments of said liquid have been drawn, and thereafter flexing said scored glass about a bending axis extending through said score line, thus to break said glass along said line.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |