Patent ID: 6328418
Filing Date: 2001-12-11
Classification: B41J

Abstract:
A print head for a printer, the print head providing a scanning line in a main scanning direction on a printing sheet, comprising:a plurality of linear print head modules arrayed side by side in an auxiliary scanning direction perpendicular to the main scanning direction, each linear print head module having a plurality of printing elements arrayed in a slanting direction with respect to the main scanning direction by an angle "".theta."", print head module having a width ""t"" perpendicular to the direction of the array of the printing elements, and the printing elements providing a first pitch ""Po"" between neighboring printing elements in the direction of the array and a second pitch ""Ps"" in the auxiliary scanning direction for defining scanning pitch on the printing sheet, the plurality of linear print head modules being also slanted by the angle "".theta."" with respect to the main scanning direction;the width ""t"" and the angle "".theta."" being defined by the following formulas: ##EQU13## .theta.=Sin.sup.-1 (Ps/Po)where n is the numbers of printing elements,A=(Ps/Po)(Po.sup.2 -Ps.sup.2).sup.1/2anda distance between the neighboring linear print head modules in the auxiliary scanning direction being ""nPs"".