US4004903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for increasing the melting rate of glass making materials
Assignee: Pilkington North America Inc
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Filing: 1975-06-05
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Granted: 1977-01-25
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Expires: 1995-06-05
Abstract
Abstract A method of and apparatus for feeding glass making materials into the forward end of a continuous glass melting furnace whereby the melting rate of the materials is increased. In accordance with the improved method, the glass making materials are continuously deposited on the molten glass bath in the doghouse of the furnace, periodically compacted to remove entrapped air therefrom, and advanced into the furnace while thus compacted. The apparatus has a reciprocating pressing member which is periodically advanced from a rest position in a raised attitude over a transverse row of newly deposited glass making materials, lowered to compact the materials between it and the surface of the molten glass bath, and advanced in its lowered attitude to move the compacted glass making materials into the melting end of the furnace.
Inventors
- 👤 Lloyd W. Daman
- 👤 Earl A. Hille
- 👤 Donald E. Shamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:33
CPC Classifications
C; C03; C03B; C03B3/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
149 words
In a glass melting furnace of the type having a melting chamber containing a bath of molten glass and a batch feeding apparatus for loosely depositing glass making materials in a transversely extending row on the surface of the molten glass, the improvement comprising: means for periodically pressing said row of loosely deposited glass making materials against the surface of said molten glass for compacting said row of glass making material, and means for advancing said pressing means toward said melting chamber wherein said row of glass making materials is bodily moved along the surface of said molten glass by said pressing means said pressing means includes a pressing member and said advancing means includes means for moving said pressing member from a raised attitude to a lowered attitude to compress said loosely deposited glass making materials between said pressing members and the surface of said molten glass bath.
Claim 2
Dependent Claim
149 words
In a glass melting furnace of the type having a melting chamber containing a bath of molten glass and a batch feeding apparatus for loosely depositing glass making materials in a transversely extending row on the surface of the molten glass, the improvement comprising: means for periodically pressing said row of loosely deposited glass making materials against the surface of said molten glass for compacting said row of glass making material, and means for advancing said pressing means toward said melting chamber wherein said row of glass making materials is bodily moved along the surface of said molten glass by said pressing means said pressing means includes a pressing member and said advancing means includes means for moving said pressing member from a raised attitude to a lowered attitude to compress said loosely deposited glass making materials between said pressing members and the surface of said molten glass bath.
Claim 3
Dependent Claim
56 words
A glass melting furnace of the type having a melting chamber containing a batch of molten glass as claimed in claim 1, wherein said moving means comprises a pivotally mounted frame, means for mounting said pressing member on said frame for reciprocating movement, and means for raising and lowering an end of said pivotally mounted frame.
Claim 4
Dependent Claim
46 words
A glass melting furnace of the type having a melting chamber containing a bath of molten glass as claimed in claim 1, including means for actuating said moving means when said pressing member has advanced to a position beneath said depositing apparatus by said advancing means.
Claim 5
Dependent Claim
30 words
A glass melting furance of the type having a melting chamber containing a bath of molten glass as claimed in claim 3, wherein said actuating means comprises a limit switch.
Claim 6
Dependent Claim
34 words
A glass melting furnace of the type having a melting chamber containing a bath of molten glass as claimed in claim 2, wherein said raising and lowering means comprises at least one power cylinder.
Claim 7
Dependent Claim
49 words
A glass melting furnace of the type having a melting chamber containing a bath of molten glass as claimed in claim 1, wherein said advancing means includes said pressing member and comprises means for reciprocally moving said pressing member parallel to the surface of said bath of molten glass.
Claim 8
Dependent Claim
83 words
A glass melting furnace of the type having a melting chamber containing a bath of molten glass as claimed in claim 6, including means for periodically actuating said advancing means to advance said pressing member in a raised attitude from a rest position to an intermediate position beneath said batch feeding apparatus, then in a lowered attitude from said intermeidate position to a terminal position, and then return said pressing member in a raised attitude from said terminal position to said rest position.
Claim 9
Dependent Claim
31 words
A glass melting furnace of the type having a melting chamber as claimed in claim 1, wherein said pressing member includes a skim blade for assisting movement of the batch materials.
Claim 10
Dependent Claim
61 words
A glass melting furnace of the type having a melting chamber as claimed in claim 6, wherein said means for reciprocally moving said pressing member comprises a chain and sprocket mechanism operatively connected to said pressing member and a reversing motor and gear reduction unit operatively connected to said chain and sprocket mechanism whereby said pressing member is advanced and retracted.
Claim 11
Independent Claim
123 words
A method of compacting and feeding glass making materials to a glass making tank-type furnace having a pressing member and containing a bath of molten glass comprising the steps of: continuously depositing glass making materials loosely and generally in strip formation onto the surface of said molten glass in said furnace, periodically advancing said pressing member from a rest position in a raised attitude over said strip of deposited glass making materials, lowering said pressing member against said strip of deposited glass making materials to compact said strip of materials between it and the surface of the molten glass bath, and advancing said pressing member in its lower attitude to move said compacted glass making materials into the melting end of said furnace.
Claim 12
Independent Claim
123 words
A method of compacting and feeding glass making materials to a glass making tank-type furnace having a pressing member and containing a bath of molten glass comprising the steps of: continuously depositing glass making materials loosely and generally in strip formation onto the surface of said molten glass in said furnace, periodically advancing said pressing member from a rest position in a raised attitude over said strip of deposited glass making materials, lowering said pressing member against said strip of deposited glass making materials to compact said strip of materials between it and the surface of the molten glass bath, and advancing said pressing member in its lower attitude to move said compacted glass making materials into the melting end of said furnace.
References Cited (Backward Citations)
US1623057A
Cited
US2533826A
Cited
US2624475A
Cited
US3167191A
Cited
US3587881A
Cited
US3780889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |