Matrix printer employing a special character font

Claim 1

Apparatus for generating printed characters according to a novel character font where the characters are formed by dots printed in print positions on the face of a moving document by printing means forming part of the head of a matrix printer, comprising: a drop-on-demand ink jet printer head supporting printing means including a plurality of distinct ink jet elements for projecting drops of ink to print dots on selected surfaces; said printing means comprising a plurality of said ink jet elements spaced apart in an odd and an even column; said ink jet printer head supporting said odd and even columns of ink jet elements in a manner such that the odd and even columns are parallel to each other; said columns being oriented in a direction to be substantially perpendicular to horizontal rows, along which ink dots are placed; the ink jets in the columns being offset from each other vertically so that each jet produces dots along a separate horizontal line; register means coupled to said printer head to provide command pluses to drive said ink jet elements, causing each driven ink jet element to project a drop of ink and provide a dot on the selected surface; said register means applying said command pulses to energize said ink jet elements in a sequence to assure that dots in successive adjacent print positions are placed on the surface by different ones of said ink jet elements and to assure that each ink jet element can be fired only on the occurrence of an alternate command pulse, whereby successive dots generated by any two ink jet elements will appear on different horizontal lines and successive dots generated by any one ink jet element will appear along a horizontal line with a blank space between dots.