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US 4,798,694 AGranted
Method for producing composite materials
AssigneeCanon Kabushiki Kaisha
InventorsHiroyuki Sugata, Kouhei Nakata, Nobutoshi Mizusawa, Satoshi Yuasa, Masahiro Haruta, Takashi Hamamoto, Kuniji Osabe
Life of this patent
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Abstract
A molded composite material comprising a plural number of constituents is provided in which at least two of the constituents are distributed with a relative existing ratio varying at least in one direction in the composite material. A process for producing the composite material is also provided.
Claims14
A process for producing a composite material comprising:
- (a) mixing a plurality of different particulate constituents in a fluid to form a mixture, the mixing ratio of the different particulate constituents being varied over a period of time;
- (b) feeding the mixture into a central portion of a rotating molding vessel having an interior cavity and filter material aroung the circumference which allows for fluid communication between said interior cavity and the exterior of said molding vessel said feeding step taking place over said period of time to deposit said different particulate constituents in a ratio therebetween varying in the rotation radius direction and in correspondence with the mixing ratio;
- (c) applying a sufficient rotational speed to said molding vessel to applying a centrifugal force to said mixture to force the fluid from the particulate constituents and through said filter material;
- (d) controlling said rotational speed so as to vary the thickness of said layers;
- and
- (e) fixing the deposited particulate constituents.
3 more elements
Dependencies are inferred from the claim text.