| 摘要 |
PURPOSE:To improve printing efficiency and to make the printing easy to see by comparing the contents of a new printing data buffer with the preceeding printing data stored in a preceeding printing data buffer to print out the new printing data at the presence of difference of data and skip printing at the coincidence of these data. CONSTITUTION:A printing head is incorporated into a data printing device 1. When printing data to be printed are inputted to a data receiving device 3 and the input data are stored in a new printing data buffer device 2a, the device 1 is actuated and prescribed data are printed out on printing paper. The device 1 compares printing data stored in a preceeding printing data buffer device 4 with the printing data from the device 2a and, when both data are coincident, skips its printing. When different, the device 1 prints out the input printing data on printing paper. Consequently printing efficiency is improved and the prints on the printing paper are made easy to see. |
