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US 4,039,703 AGranted
Method for producing a tubular multi-layered porous barrier
AssigneeSumitomo Electric Industries, Ltd.
InventorsEiji Kamijo, Tatsuya Nishimoto, Masaaki Honda
Life of this patent
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Abstract
A method for producing a tubular multi-layered porous barrier comprising the step of depositing fine powder onto at least one of the inner and outer surfaces of a sintered tubular porous support member in a layer of uniform thickness to form a fine powder layer and pressurizing said powder layer against said support member to form a porous barrier layer on the support member.
Claims12
A method for producing a tubular multi-layered porous barrier comprising the steps:
- depositing a fine powder selected from the group consisting of a metal, a ceramic or an organic synthetic resin onto the inner surface of a sintered tubular porous support member in a layer of uniform thickness, thereby forming a fine powdered layer, said fine powder deposition step including the steps of:
- supplying said fine powder into said porous support member,
- spreading said fine powder around the inner surface of said porous support member into a layer of uniform thickness, and
- compressing said fine powder layer against said inner surface of said porous support member by centrifugal force while rotating said porous support member, thereby adhering said layer to said support member;
- and
- static pressure compression-forming said powder layer against said support member by applying pressure against said fine powder layer radially and outwardly.
3 more elements
A method for producing a tubular multi-layered porous barrier comprising the steps of:
- depositing a fine powder selected from the group consisting of a metal, a ceramic, or an organic synthetic resin onto the inner surface of a sintered tubular porous support member in a layer of uniform thickness, thereby forming a fine powder layer, said fine powder deposition step including the steps of:
- inserting a flexible tube into the hollow interior of said porous support member in a spaced relationship from the inner periphery of said porous support member,
- charging said fine powder between said porous support member and said flexible tube,
- spreading said fine powder onto the inner surface of said porous support member into a layer of uniform thickness, and
- compressing said fine powder layer against said inner surface of said porous support member by centrifugal force while rotating said porous support member and said flexible tube together and by a fluid pressure force acting on the inner surface of said flexible tube and expanding it radially outwardly, whereby the fine powder layer is adhered to said support member;
- and
- static pressure compression-forming said powder layer against said support member by applying pressure against said fine powder layer radially and outwardly.
4 more elements
Dependencies are inferred from the claim text.