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Control apparatus of copying machine with improved communication function for centralized control unit

  • US 5,300,980 A
  • Filed: 04/08/1991
  • Issued: 04/05/1994
  • Est. Priority Date: 04/10/1990
  • Status: Expired due to Term
First Claim
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1. A control apparatus collecting data related to a copying machine and communicating with a centralized control unit on the basis of the collected data, comprising:

  • communication means for calling said centralized control unit;

    first control means for activating said communication means when a predetermined transmission condition is satisfied, said predetermined transmission condition including one with high priority and one with low priority;

    determination means for determining that connection with said centralized control unit cannot be made in spite of the fact that said communication means is activated;

    differentiating means for differentiating a priority of said predetermined transmission condition in response to an output of said determination means;

    setting means for setting retransmission time on the basis of a random number from a predetermined time period when it is differentiated by said differentiating means that the priority of said predetermined transmission condition is low;

    timer means for counting the present time; and

    second control means for having said communication means call said centralized control unit again when the present time becomes the redialing time.

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