Patent US3899326A successfully refreshed from Google Patents.
US3899326A
Expired / Lapsed
US
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Method of making monolithic honeycombed structures
Assignee: Corning Glass Works
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Filing: 1973-03-30
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Granted: 1975-08-12
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Expires: 1993-03-30
Abstract
Abstract A method of making an extruded, monolithic, honeycombed structure of ceramic or other sinterable material without delaminating, cracking or slumping. During extrusion and firing and the interim therebetween, the axis of an extruded honeycombed structure is positioned substantially horizontally with the cell walls oriented so as to maximize the vertical support provided by the cell walls. The vertical support is maximized by orienting the honeycombed structure such that series of interconnected cell walls extending from one surface of the structure to another extend in a generally vertical direction with the minimum horizontal projection.
Inventors
- 👤 Rodney I Frost
- 👤 Louis M Holleran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:37
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/20; B28B3/26; B28B3/269; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1103; B22F3/1115; B22F2998/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
113 words
A METHOD OF MAKING A MONOLITHIC HONEYCOMBED STRUCTURE HAVING A MATRIX OF WALLS FORMING A MULTIPLICITY OF OPENENDED CELLS EXTENDING FROM ONE END OF THE STRUCTURE OF THE OTHER BY EXTRUDING A PLASTICALLY DEFORMABLE AND SINTERABLE BATCH THROUGH AN EXTRUSION DIE TO FORM A HONEYCOMBED STRUCTURE AND FIRING THE EXTRUDED STRUCTURE TO EFFECT SINTERING, THE IMPROVEMENT COMPRISING: POSITIONING THE EXTRUSION AXIS OF THE STRUCTURE DURING FIRING SO AS TO EXTEND IN A SUBSTANTIALLY HORIZONTAL DIRECTION, AND ORIENTING THE CELL WALLS DURING FIRING SUCH THAT SERIES OF CONNECTED CELL WALLS EXTENDING FROM ONE SIDE OF THE STRUCTURE TO THE OTHER EXTEND IN A GENERALLY VERTICAL DIRECTION WITH A MINIMUM HORIZONTAL PROJECTION OF SAID SERIES.
Claim 2
Independent Claim
113 words
A METHOD OF MAKING A MONOLITHIC HONEYCOMBED STRUCTURE HAVING A MATRIX OF WALLS FORMING A MULTIPLICITY OF OPENENDED CELLS EXTENDING FROM ONE END OF THE STRUCTURE OF THE OTHER BY EXTRUDING A PLASTICALLY DEFORMABLE AND SINTERABLE BATCH THROUGH AN EXTRUSION DIE TO FORM A HONEYCOMBED STRUCTURE AND FIRING THE EXTRUDED STRUCTURE TO EFFECT SINTERING, THE IMPROVEMENT COMPRISING: POSITIONING THE EXTRUSION AXIS OF THE STRUCTURE DURING FIRING SO AS TO EXTEND IN A SUBSTANTIALLY HORIZONTAL DIRECTION, AND ORIENTING THE CELL WALLS DURING FIRING SUCH THAT SERIES OF CONNECTED CELL WALLS EXTENDING FROM ONE SIDE OF THE STRUCTURE TO THE OTHER EXTEND IN A GENERALLY VERTICAL DIRECTION WITH A MINIMUM HORIZONTAL PROJECTION OF SAID SERIES.
Claim 3
Dependent Claim
46 words
The method of claim 1 wherein the orientation of said cells walls is such that the minimum horizontal projection of said series is no greater than the lateral projection of any other series of cell walls extending from one side of the structure to the other.
Claim 4
Dependent Claim
51 words
The method of claim 2 wherein the orientation of said cell walls is such that the average horizontal projection of said cell walls in said series is no greater than the average lateral projection of cell walls in any other series extending from one side of the structure to the other.
Claim 5
Dependent Claim
44 words
The method of claim 1 wherein the horizontal width of the structure as measured along a line perpendicular to the extrusion axis is at least as great as the vertical height of the structure as measured along a line perpendicular to the extrusion axis.
Claim 6
Dependent Claim
25 words
The method of claim 1 including the step of drying said structure after extruding and before firing, said positioning and orienting being utilized during drying.
Claim 7
Dependent Claim
32 words
The method of claim 5 including the step of cutting said structure transversely with respect to the extrusion axis after extruding and before drying, said positioning and orienting being utilized during cutting.
Claim 8
Dependent Claim
24 words
The method of claim 1 wherein said positioning and said orienting are utilized substantially throughout the interim beginning with extruding and terminating after firing.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |