| 摘要 |
PURPOSE:To minimize recovery work when printing faults such as the omission of a word is generated, by counting the number of printing lines and performing test printing automatically when the counted number of printing lines reach the definite number of lines. CONSTITUTION:A line counter circuit 1 is reset to zero when a power source is turned on and, thereafter, and is incremented by +1 each time one line is printed. When the line counter circuit 1 reaches the predetermined number of lines, a test printing demand signal 1a is applied to a test printing control circuit 2. The width of the printing paper 11 mounted to a line printer is set by a paper width setting switch 13. When the data of one line is sent to a printing data memory 5, printing operation is applied only to a printing figure to which the printing paper is mounted and, because the printing to a printing figure to which no printing paper is mounted is prohibited by a blank code, blind printing can be prevented and optimum test printing matched with mounting state of the printing paper is performed. |
