| 摘要 |
<p>PURPOSE:To prevent the titled device from generation of an error by inhibiting the input of reading information from a bar-code reader for the period till a prescribed time elapses after the completion of the reading of necessary information. CONSTITUTION:After starting of the reading of an encode BE by a bar-code reader, a CPU2 outputs a signal BE of ''1'' to an AND gate 3 to open the gate 3. Three signals of level ''1'' due to a continuous bit and check-sum are outputted from the AND gate 3 and inputted to ternary counter 5 through a CR differential circuit 4 to be counted. The carrier output of the ternary counter 5 is supplied to the CPU2 and a CR differential circuit 6, so that the CPU2 stops the output of the signal BE and an output pulse from the CR differential circuit 6 is applied to respective reset input terminals R of a counter 7 and an SR type flip flop 8 to reset them.</p> |
