Teletype Corporation

Anthony J Hauser

James M Berry

Gary B Ollendick

Kurt E Knuth

Carl D Swanson

An ink jet printer in which refined half-tones or shades of gray are produced while retaining high contrast capability using a dot matrix in which the dots are of the same density for the same shading plus or minus one drop of ink at selected dot locations within the matrix but with each dot being printed in response to an individual shading density or darkness input signal.

Gray tone generation

One end of a glass tube is packed with glass powder of a predetermined size. The combination is then sintered to produce a filter within the tube. The resultant tube and filter are thoroughly washed in the direction toward the other end of the tube. The other end of the glass tube is melted to form a restriction to the flow fluid. The other end of the tube is then ground down until a microscopic orifice appears. The resultant structure is a self filtering nozzle of an exceedingly small diameter with a very low propensity to clog.

Methods of making self filtering nozzles

A two piece mask for an ink jet printer in which the knife edge for intercepting waste ink comprises part of a structure for supporting a meniscus of ink that drains drops of ink from the knife edge and allows the ink to flow away from the region of the knife edge through a suitable flow path while separating waste ink from the record medium of the printer.

Growing community of inventors

Stone Park, IL, United States of America

Anthony J Hauser