Device for determining paper size based on time data

An electrophotographic printing apparatus, comprising:

• a feeding path;
• feeding means for feeding paper along said feeding path;
• an image carrier;
• image forming means for creating an electrostatic latent image on said image carrier, developing the latent image and transferring the developed image to the paper on said feeding path;
• motor means for driving said feeding means;
• paper sensing means for sensing an absence of paper condition and a presence of paper condition at a preset position on said feeding path;
• pulse generating means for generating a clock pulse at predetermined intervals to drive said motor means;
• counter means for counting a number of pulses generated by said pulse generating means while the presence of paper condition is sensed by said paper sensing means;
• mode setting means for sequentially setting first, second, and third modes, said first mode being set at an operation start condition, said second mode being set when the presence of paper condition is sensed by said paper sensing means as the mode setting means is in said first mode, and said third mode being set when said absence of paper condition is sensed by said paper sensing means as the mode setting means is in said second mode;
• and
• data processor means for controlling said image forming means and said motor means to print an image, and for determining, when said third mode is set during control of printing, a paper size according to the number of pulses counted by said counter means.