US4351656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure forming bushing
Assignee: PPG Industries Inc
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Filing: 1981-08-27
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Granted: 1982-09-28
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Expires: 2001-08-27
Abstract
Abstract A fiber glass bushing is disclosed which is formed with a corrugated bottom which provides a plurality of flat ridges on which are positioned orifices. The ridges are separated by grooves containing ceramic insulation and the bushing provided with means to support the bottom when glass is being drawn from the orifices.
Inventors
- 👤 Thomas H. Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:34
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/08; C03B37/01; C03B37/02; C03B37/0203; C03B37/0209; C03B37/0213; C03B37/0216; C03B37/083
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
123 words
A fiber glass forming bushing comprising a container for molten glass having a corrugated bottom forming a plurality of ridges and grooves, said ridges having a generally flat surface and said grooves forming a space between adjacent ridges, each ridge being spaced equidistant from the next adjacent ridge, insulating material filling each of said grooves, orifices positioned on said ridges and projecting therefrom, said orifices being in communication with the interior of said container to thereby permit molten glass to pass from said container through said orifices by gravity and means to connect said bushing to a molten glass source and means external of the bushing and in contact with said insulating material to provide mechanical support to the bottom of the bushing.
Claim 2
Dependent Claim
123 words
A fiber glass forming bushing comprising a container for molten glass having a corrugated bottom forming a plurality of ridges and grooves, said ridges having a generally flat surface and said grooves forming a space between adjacent ridges, each ridge being spaced equidistant from the next adjacent ridge, insulating material filling each of said grooves, orifices positioned on said ridges and projecting therefrom, said orifices being in communication with the interior of said container to thereby permit molten glass to pass from said container through said orifices by gravity and means to connect said bushing to a molten glass source and means external of the bushing and in contact with said insulating material to provide mechanical support to the bottom of the bushing.
Claim 3
Dependent Claim
20 words
The bushing of claim 1 wherein the ridges contain at least two rows of bushing tips, the rows being staggered.
Claim 4
Dependent Claim
23 words
The bushing of claim 1 wherein the means to reinforce the bottom of the bushing are flat plate blades of a fin cooler.
Claim 5
Dependent Claim
26 words
The bushing of claim 1 wherein said bushing is flared from the bottom to the top to its point of attachment to the molten glass source.
Claim 6
Dependent Claim
25 words
The bushing of claim 1 wherein means are provided to provide a constant supply of gaseous fluid on the upper surfaces of said support member.
Claim 7
Dependent Claim
123 words
A fiber glass forming bushing suitable for high pressure forming comprising a container for molten glass, said container being provided with a corrugated bottom forming a plurality of ridges and grooves thereon, said ridges being closely spaced one from the other and equidistant from each other, means in said grooves thermally insulating each of said ridges from the ridges adjacent thereto, a plurality of orifices projecting from each of said ridges, said orifices being arranged in rows and in fluid communication with the interior of said container to thereby permit glass to flow from said container and through said orifices, means to connect said container to a high pressure source of molten glass, and means to support the corrugated bottom of said bushing.
Claim 8
Dependent Claim
123 words
A fiber glass forming bushing suitable for high pressure forming comprising a container for molten glass, said container being provided with a corrugated bottom forming a plurality of ridges and grooves thereon, said ridges being closely spaced one from the other and equidistant from each other, means in said grooves thermally insulating each of said ridges from the ridges adjacent thereto, a plurality of orifices projecting from each of said ridges, said orifices being arranged in rows and in fluid communication with the interior of said container to thereby permit glass to flow from said container and through said orifices, means to connect said container to a high pressure source of molten glass, and means to support the corrugated bottom of said bushing.
Claim 9
Dependent Claim
15 words
The bushing of claim 6 wherein the ridges have at least two rows of orifices.
Claim 10
Dependent Claim
13 words
The bushing of claim 7 wherein said orifices have a tip projecting therefrom.
Claim 11
Dependent Claim
12 words
The bushing of claim 6 wherein said orifices have tips projecting therefrom.
Claim 12
Dependent Claim
17 words
The bushing of claim 6 wherein the means to support said corrugated bottom is a fin cooler.
Claim 13
Dependent Claim
16 words
The bushing of claim 6 wherein said support means also provides gaseous coolant to said bushing.
Claim 14
Dependent Claim
113 words
A fiber glass forming bushing comprising a container for molten glass having a corrugated bottom forming a plurality of ridges and grooves, said ridges having a generally flat surface and said grooves forming a space between adjacent ridges, insulating material filling each of said grooves, orifices positioned on said ridges and projecting therefrom, said orifices being in communication with the interior of said container to thereby permit molten glass to pass from said container through said orifices by gravity and means to connect said bushing to a molten glass source and means external of the bushing and in contact with said insulating material to provide mechanical support to the bottom of the bushing.
Claim 15
Dependent Claim
113 words
A fiber glass forming bushing comprising a container for molten glass having a corrugated bottom forming a plurality of ridges and grooves, said ridges having a generally flat surface and said grooves forming a space between adjacent ridges, insulating material filling each of said grooves, orifices positioned on said ridges and projecting therefrom, said orifices being in communication with the interior of said container to thereby permit molten glass to pass from said container through said orifices by gravity and means to connect said bushing to a molten glass source and means external of the bushing and in contact with said insulating material to provide mechanical support to the bottom of the bushing.
Claim 16
Dependent Claim
20 words
The bushing of claim 12 wherein the ridges contain at least two rows of bushing tips, the rows being staggered.
Claim 17
Dependent Claim
23 words
The bushing of claim 12 wherein the means to reinforce the bottom of the bushing are flat plate blades of a fin cooler.
Claim 18
Dependent Claim
26 words
The bushing of claim 12 wherein said bushing is flared from the bottom to the top to its point of attachment to the molten glass source.
Claim 19
Dependent Claim
25 words
The bushing of claim 12 wherein means are provided to provide a catalyst supply of gaseous fluid on the upper surfaces of said support member.
Claim 20
Dependent Claim
118 words
A fiber glass forming bushing suitable for high pressure forming comprising a container for molten glass, said container being provided with a corrugated bottom forming a plurality of ridges and grooves thereon, said ridges being closely spaced one from the other means in said grooves thermally insulating each of said ridges from the ridges adjacent thereto, a plurality of orifices projecting from each of said ridges, said orifices being arranged in rows and in fluid communication with the interior of said container to thereby permit glass to flow from said container and through said orifices, means to connect said container to a high pressure source of molten glass, and means to support the corrugated bottom of said bushing.
Claim 21
Dependent Claim
118 words
A fiber glass forming bushing suitable for high pressure forming comprising a container for molten glass, said container being provided with a corrugated bottom forming a plurality of ridges and grooves thereon, said ridges being closely spaced one from the other means in said grooves thermally insulating each of said ridges from the ridges adjacent thereto, a plurality of orifices projecting from each of said ridges, said orifices being arranged in rows and in fluid communication with the interior of said container to thereby permit glass to flow from said container and through said orifices, means to connect said container to a high pressure source of molten glass, and means to support the corrugated bottom of said bushing.
Claim 22
Dependent Claim
15 words
The bushing of claim 17 wherein the ridges have at least two rows of orifices.
Claim 23
Dependent Claim
13 words
The bushing of claim 18 wherein said orifices have a tip projecting therefrom.
Claim 24
Dependent Claim
12 words
The bushing of claim 17 wherein said orifices have tips projecting therefrom.
Claim 25
Dependent Claim
17 words
The bushing of claim 17 wherein the means to support said corrugated bottom is a fin cooler.
Claim 26
Dependent Claim
16 words
The bushing of claim 17 wherein said support means also provides gaseous coolant to said bushing.
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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) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |