US3713787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous plate made of metal fibers
Assignee: Mitsui Kinzoku Co Ltd
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Filing: 1970-11-23
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Granted: 1973-01-30
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Expires: 1990-11-23
Abstract
Abstract A porous plate substantially consisting of metal fibers which are formed in a layer, wherein said fibers which form the external circumferential area and/or a part of the internal area of the aforementioned layer are bonded, and such bonded part has a higher density as compared with the area other than the bonded part.
Inventors
- 👤 Y Kuniyasu
- 👤 A Matsumoto
- 👤 E Isobe
- 👤 H Honda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:49
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/002; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2027; B01D39/2041; B01D39/2044; B01J; B01J35/00; B01J35/30; B01J35/34; B01J35/36; Y; Y10; Y10S; Y10S264/00; Y10S264/19; Y10T; Y10T29/00; Y10T29/49; Y10T29/49801; Y10T428/00; Y10T428/12; Y10T428/12389; Y10T428/12424; Y10T428/12479; Y10T428/29; Y10T428/2913; Y10T428/298
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
A method of preparing a porous plate of metal fibers, which consists essentially of the steps of forming a non-compressed, unsintered plate-like mass consisting of felted, non-oxidized, elongated, metal fibers free from bonding to each other, placing said mass into a mold, simultaneously compressing the mass in the mold by applying to a portion or portions of the mass a localized higher pressure than the pressure applied to the remainder of said mass and heating the mass to a temperature at which sintering takes place only under said localized higher pressure to form a plate in which the fibers of said portion or portions are bonded and sintered to each other and the fibers in the remainder of said mass are free from bonding to each other, the density of said portion or portions being at least 10% higher than the density of the remainder of said mass, and then removing the mass from the mold.
Claim 2
Independent Claim
156 words
A method of preparing a porous plate of metal fibers, which consists essentially of the steps of forming a non-compressed, unsintered plate-like mass consisting of felted, non-oxidized, elongated, metal fibers free from bonding to each other, placing said mass into a mold, simultaneously compressing the mass in the mold by applying to a portion or portions of the mass a localized higher pressure than the pressure applied to the remainder of said mass and heating the mass to a temperature at which sintering takes place only under said localized higher pressure to form a plate in which the fibers of said portion or portions are bonded and sintered to each other and the fibers in the remainder of said mass are free from bonding to each other, the density of said portion or portions being at least 10% higher than the density of the remainder of said mass, and then removing the mass from the mold.
Claim 3
Dependent Claim
54 words
A method according to claim 1, wherein the metal fibers consist of a material selected from the group consisting of lead and lead-alloys, and a pressure in the range of from 0.03 to 0.5 t/cm2 is applied to said portion or portions at a temperature in the range of from 20* to 200* C.
Claim 4
Dependent Claim
54 words
A method according to claim 1, wherein the metal fibers consist of a material selected from the group consisting of zinc and zinc-alloys, and a pressure in the range of from 0.05 to 0.8 t/cm2 is applied to said portion or portions at a temperature in The range of from 180* to 300* C.
Claim 5
Dependent Claim
54 words
A method according to claim 1, wherein the metal fibers consist of a material selected from the group consisting of copper and copper-alloys, and a pressure in the range of from 0.3 to 2.0 t/cm2 is applied to said portion or portions at a temperature in the range of from 350* to 500* C.
Claim 6
Dependent Claim
120 words
A porous plate made of non-oxidized metal fibers which consist essentially of a plate-like mass consisting of felted, non-oxidized, elongated, metal fibers having a diameter in the range of from about 30 Mu to about 150 Mu , said mass having compressed portion or portions of reduced thickness in which the fibers are bonded and sintered to each other, said compressed portions having a density in excess of 70 percent of the density of the metal fiber, the remainder of said mass being less compressed and having a density of less than 60 percent of the density of the metal fiber, the fibers in the remainder of said mass being mechanically interlocked but substantially free of bonding to each other.
Claim 7
Dependent Claim
120 words
A porous plate made of non-oxidized metal fibers which consist essentially of a plate-like mass consisting of felted, non-oxidized, elongated, metal fibers having a diameter in the range of from about 30 Mu to about 150 Mu , said mass having compressed portion or portions of reduced thickness in which the fibers are bonded and sintered to each other, said compressed portions having a density in excess of 70 percent of the density of the metal fiber, the remainder of said mass being less compressed and having a density of less than 60 percent of the density of the metal fiber, the fibers in the remainder of said mass being mechanically interlocked but substantially free of bonding to each other.
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |