US3656928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for continuously incorporating modifiers into molten glass
Assignee: Compagnie de Saint Gobain SA
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Filing: 1970-02-24
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Granted: 1972-04-18
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Expires: 1990-02-24
Abstract
Abstract Solid particulate material such as colorant to be added to and homogenized with molten glass in a melting furnace, is deposited into a reservoir over and subjected to the hot atmosphere of the furnace and thereby melted. The molten material or additive flows continuously from the reservoir in a plurality of small filaments which fall onto a smooth inclined planar surface of heat resistant material dipping into the molten glass. On the planar surface the filaments spread out into a smoothly and downwardly flowing stream of uniform minute thickness which passes into the molten glass without turbulence and without entrainment of air bubbles. If required, additional heating means for the solid particulate additive or frit, may be provided.
Inventors
- 👤 German Artigas Gimenez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:26
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/173
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
A method of melting particulate material and of distributing the melt uniformly throughout a width of a stream of molten glass flowing along a glass melting furnace which comprises forming a column of the particulate material within the furnace above the surface of the molten glass in a location such that the column is exposed to the hot gases and radiant heat of the furnace, the length of the column being such that the particulate material melts in the heat of the furnace before it reaches the surface of the glass, forming the molten material into a thin ribbon progressing toward the surface of the bath, supporting the molten ribbon on a hot surface as it approaches the bath, and introducing the hot, molten ribbon into the moving stream of glass.
Claim 2
Independent Claim
131 words
A method of melting particulate material and of distributing the melt uniformly throughout a width of a stream of molten glass flowing along a glass melting furnace which comprises forming a column of the particulate material within the furnace above the surface of the molten glass in a location such that the column is exposed to the hot gases and radiant heat of the furnace, the length of the column being such that the particulate material melts in the heat of the furnace before it reaches the surface of the glass, forming the molten material into a thin ribbon progressing toward the surface of the bath, supporting the molten ribbon on a hot surface as it approaches the bath, and introducing the hot, molten ribbon into the moving stream of glass.
Claim 3
Dependent Claim
50 words
A method according to claim 1 in which the column of particulate material is of elongated, substantially rectangular shape in cross section, and a long face of the rectangle is divided into a multiplicity of equal sized, arcuate segments, and the hot gases of the furnace enter into the segments.
Claim 4
Dependent Claim
17 words
A method according to claim 1 in which the particulate material is coloring matter for the glass.
Claim 5
Dependent Claim
21 words
A method according to claim 1 which comprises cooling the upper part of the circumference of the column of particulate material.
Claim 6
Independent Claim
91 words
A method of uniformly adding a melt to a stream of molten flowing glass which comprises introducing the ingredients of the melt in solid particulate form within the furnace containing the flowing stream, melting said ingredients by the heat of the furnace, dividing the melt into streams of equal dimensions flowing toward the molten glass, transforming the streams of equal dimensions into a ribbon of minute thickness, flowing the ribbon along a course diagonally approaching the surface of the glass, and joining the ribbon and the stream of molten flowing glass.
Claim 7
Independent Claim
91 words
A method of uniformly adding a melt to a stream of molten flowing glass which comprises introducing the ingredients of the melt in solid particulate form within the furnace containing the flowing stream, melting said ingredients by the heat of the furnace, dividing the melt into streams of equal dimensions flowing toward the molten glass, transforming the streams of equal dimensions into a ribbon of minute thickness, flowing the ribbon along a course diagonally approaching the surface of the glass, and joining the ribbon and the stream of molten flowing glass.
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Cited
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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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |