The Mead Corporation

Dennis E Bok

David A Huliba

Mark E Brown

Robert J Scranton

George W Denlinger

Clifford S Fernalld, Jr

James R Meckstroth

Charlie H Hill, Jr

Robert W Coulter

Steven R Hahn

Patrick E Bridge

Thomas M Wysinski

An ink supply system for supplying ink through the print head of an ink jet printer includes a pump arrangement supplying ink to the print head from a supply tank and, further, plural ink return lines connected between the pump outlet and the pump inlet. Each of the ink return lines includes a flow restriction, with the flow restriction in each line providing a fluid flow impedance which differs from the impedances provided by the other flow restrictions. A valve arrangement controls the connection of the pump outlet to a selected one of the ink return lines, such that the flow rate of ink through the ink supply line to the print head is effectively controlled.

Ink supply system for an ink jet printer

An ink jet printing apparatus for printing addresses on documents being transported along an independently operated conveyor. The printing apparatus includes a control console, a printing arm telescopically received within the console, and an ink jet printing head mounted on a carriage which is vertically movable within the printing arm. A tachometer wheel is mounted on the printing carriage for contacting a document being transported past the printing head and generating a tachometer signal in response thereto. A programmed microprocessor generates printing control signals in synchronism with the tachometer signal.

Ink jet printing apparatus

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Dayton, OH, United States of America

Dennis E Bok