Printing apparatus with lower transporting speed between printing operations

A printing apparatus comprising:

• printing data memory means for storing printing data,
• printing means for printing based on said printing data received from said printing data memory means,
• line sensor means which generates a horizontal synchronous signal of said printing means,
• drive means for driving a printing medium forward and backward at a given revolving speed,
• stand-by operation memory means for memorizing operation sequences of said drive means in a stand-by state, the stand-by state being followed by a normal operation state wherein said printing medium is transported at a fixed revolution speed in a transporting direction, said printing medium being driven forward and backward at equal lengths in the transporting direction at a lower revolving speed in the stand-by state than in normal operation state,
• drive control means for controlling said drive means to revolve the printing medium at a given revolving speed in the normal operation state, and for controlling revolving speed and revolving direction of said drive means in the stand-by state in accordance with operation sequences memorized in said stand-by operation memory means, and
• system control means for shifting said drive control means from the normal operation state to the stand-by state when said printing data memory means outputs printing data to be printed out, said system control means shifting said drive control means from the stand-by operation state to the normal operation state when said printing data memory means is ready to print more data, said system control means also controlling said printing means when said printing medium is set at a fixed position.