The Mead Corporation

Roger D Wells

Suresh C Paranjpe

James W Davis

Robert J Scranton

Rodger L Gamblin

Bertram Van Breemen

Robert A Miller

An ink jet printer includes a print head means which generates two parallel rows of jet drop streams. Charge electrodes are mounted on a pair of charge electrode plates which are movable into and out of drop charging positions. A pair of catchers each define a drop catching surface and a drop ingesting slot along the lower edge of the drop catching surface. Each of the catchers is generally pivotally mounted for rotation about an axis parallel to the rows of jet drop streams. The catchers may be pivoted from a drop catching position, in which the drop catching surfaces are substantially parallel, to a full catch position in which drop catching surfaces are inclined to face upward and intercept the jet drop streams. In the full catch position, the drop ingesting slots are positioned closely together. A linkage arrangement is provided for pivoting the catchers from the full catch position to the drop catch position after start up of the print head means. The linkage arrangement also moves the charge electrode plates into the drop charging positions after the catchers are pivoted sufficiently to apply a drop deflecting potential to thereto, but while the drop catching surfaces intercept the jet drop streams.

Ink jet printer

A duplex printing arrangement is provided for printing on both sides of a plurality of rectangular sheets of paper, each of the sheets having a pair of parallel opposite edges which are shorter than the pair of edges perpendicular thereto. Each of the sheets is transported past a printer in a direction parallel to the longer pair of the edges of the sheet. The sheets are printed on a first side as they are moved past the printer with a first edge of the pair of shorter edges being the leading edge. The sheets are thereafter turned end-for-end and moved past the printer for printing a second side of each of the sheets, with the second printing pass being such that the first edge of each of the sheets is again the leading edge.

Duplex printer and method of printing

Ink jet printer startup and shutdown procedure

A jet drop printing head comprises a transportable upper assembly and a lower assembly adapted for receiving the upper assembly in such a manner as to control the alignment between the two assemblies. A novel catcher mounting assembly permits ready operational positioning of a pair of catchers and easy downward swinging for inspection of the charge plate.

Catcher mounting apparatus for a jet drop printer

Growing community of inventors

Dayton, OH, United States of America

Roger D Wells