Method of forming uniform thin coatings on large substrates

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5853815
SERIAL NO

08922001

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A plasma system forms a dense, uniform coating of metallic oxide or other material on a relatively large substrate of metal foil or other composition located a substantial distance from the plasma gun so that the plasma stream covers the entire width of the substrate. A large pressure differential between the pressure inside the plasma gun and the ambient pressure outside of the plasma gun creates a shock pattern within the exiting plasma stream so as to disperse the plasma stream and maintain a high energy level therein, as well as thoroughly mixing a coating material introduced into the plasma stream within the gun. Mixing of the coating material within the plasma stream is further enhanced by introducing the coating material into the plasma stream either in liquid form or in the form of very small particles. In one arrangement, the plasma stream is delivered in a long, narrow configuration across the width of the substrate by a nozzle with a slit-like opening at the lower end of the plasma gun. In still other arrangements, a plasma stream of elongated configuration is provided by a plasma gun of elongated configuration having an elongated cathode assembly disposed within the hollow interior of an elongated anode having a nozzle-forming slot therein. Arc gas introduced into the space between the cathode and adjacent portions of the anode flows out of the slot to form a broad plume plasma stream, in conjunction with spray material introduced in powder form into the spaces between the cathode and the opposite portions of the anode along the length of the plasma gun. The cathode assembly may be of integral construction along the length of the anode, or it may be divided into plural segments disposed in spaced-apart relation along the length of the anode.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SULZER METCO AGWOHLEN45

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Muehlberger, Erich San Clemente, CA 15 456

Cited Art Landscape

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Patent Citation Ranking

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* Cited By Examiner