Patent ID: 8120787

Claim:
An information terminal device having a diagram printing function and comprising: printing means for outputting printing data onto a continuous roll of paper having a predetermined width; wherein the method is characterized in that said information terminal device has printing data generating unit for generating the printing data, and an angle calculator; said angle calculator calculates, on the basis of diagram data comprising data of a diagram having a bend point and data of an angle of bend at that bend point, an angle index at which said roll paper is to be folded in correspondence with said bend point, and calculates a length of a blank portion, which is printing data that divides said diagram at each bend point and proceeds along the longitudinal direction of said roll paper, and which breaks the continuity of said diagram at the folded portion determined by said angle index; and said printing data generating unit generates, on the basis of said angle index and the blank length, printing data for dividing said diagram at each bend point and proceeding along the longitudinal direction of the roll paper.