Check number counter device for paper counting machine

In a paper counting machine, including:

• a suction cylinder for sucking to deflect sheets of paper one by one so that the latter may be counted,
• a vacuum switch for controlling the operations of said suction cylinder for generating an operation terminating signal indicating when the operations of said suction cylinder are terminated,
• counter means for counting the number of said deflected sheets until generation of said operation terminating signal, and generating a counter output, and
• comparator means for comparing said counter output with a predetermined number, and issuing a coincidence signal when said counter output and said predetermined number coincide;
• a check number counter device comprising:
• AND gate means responsive to both said coincidence signal and the operation terminating signal of said vacuum switch for generating a gate output when both the coincidence signal and the operation terminating signal are received, and for not generating said gate output when both the coincidence signal and the operation terminating signal are not received;
• and
• counter means responsive to the gate signal of said AND gate means for counting occurences thereof, whereby to count the number of coincidence signals.