Electronic typewriter

Abstract

An electronic typewriter has a function of making a rectangular frame, which is composed of a horizontal line and a vertical line. To make a frame in the course of the sequential input of characters, an operator moves the printing position to the upper left vertex of the frame that is to be printed, and then, the operator depresses a specific key, which is called frame key, when the printing position arrives at the upper left vertex of the frame that is to be printed. After the operator puts in characters or spaces that are to be inserted in the frame, the operator moves the printing point to the lower right vertex of the frame and the operator then depresses the frame key again. By the operations of twice depressing the frame key, the printing position data for making the frame is taken in. The electronic typewriter then calculates both the starting and ending positions of the segments that compose the frame. At the conclusion of this calculation, the electronic typewriter prints the frame by using underline type and vertical bar type.