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US 4,487,662 AGranted
Electrodeposition method for check valve
AssigneeXerox Corporation
InventorKenneth H. Fischbeck
Life of this patent
Estimating the term…
Abstract
A check valve for a drop-on-demand pressure pulse ejector for preventing pressure pulse loss to the liquid supply system. The check valve is made by electrodeposition onto the surface of a substrate.
Claims1
The method of forming a check valve by electrochemical deposition on a substrate for a pulsed pressure drop ejecting apparatus which comprises:
- (a) providing a substrate having a surface adapted for electrochemical deposition thereon, said substrate including a channel therethrough;
- (b) plugging said channel with a removable plug;
- (c) forming a substantially "U"-shaped pattern on said surface of said substrate encompassing said plug of a material which will inhibit electrochemical deposition;
- (d) providing on said surface of said substrate within said substantially "U"-shaped pattern of inhibiting material a passivating material which is electrically conductive and tenously bonded to said surface;
- (e) electrochemically depositing a layer on said surface and said passivating material until a deposition of the desired thickness is formed;
- and
- (f) removing said removable plug.
4 more elements
Dependencies are inferred from the claim text.