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Sequential control circuit means
| Details |
Inventors: Arai, Kenichi; Shibazaki, Kenji; Kitagawa, Tsuneo; Murata, Tomoji; Nagata, Kenzo;
Assignee: Minolta Camera Kabushiki Kaisha (Osaka, JP)
Primary Examiner: Braun; Fred L.
Assistant Examiner:
Attorney, Agent or Firm: Wenderoth, Lind & Ponack
Sequential control circuit for sequentially controlling the operation of mechanical equipment, for example, an electrophotographic copying apparatus including various devices having respective smaller devices is characterized in that a first train of clock pulses having a fixed predetermined frequency is converted into a third train of clock pulses whose respective pulses are in synchronism with respective pulses of a second train of clock pulses sequentially generated in accordance with respective driven rates of the sequentially driven devices, so that a respective digital timer circuit which is preset with operational time data of its respective device is capable of successively performing the decrement of the predetermined time in response to the respective pulses of the respective third train of clock pulses. |
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DETAILED DESCRIPTION Accordingly, an esential object of the present invention is to provide a sequential control circuit means for controlling the sequential functioning of a plurality of independently driven devices including their respective smaller devices constituting an apparatus such as an electrophotographic copying apparatus, wherein respective unsteady variations in sequential durations for the functioning of the above-mentioned respective devices with reference to the respective predetermined durations, which may be brought about through respective variations in driven rates effected by a driving means, is properly compensated for, to thereby properly accomplish a specific operational object of the above-mentioned apparatus.
Another important object of the present invention is to provide a sequential control circuit means of the above-described type, wherein a sequential series of the respective functioning of a plurality of independently driven devices including their smaller devices constituting an electrophotographic copying apparatus are brought about one by one in accordance with the transportational rate of a copy paper as well as copy paper resultantly bearing a transferring image thereon even under any unsteady driven conditions of the devices, when the sequential control circuit means of the present invention is applied to an electrophotographic copying apparatus.
A further object of the present invention is to provide a sequential control circuit means of the above-described type, wherein the sequential control circuit means of the present invention is combined with a microcomputing circuit means, to thereby cause the substantial sequential control of the electrophotographic copying apparatus to be accomplished by the combination of the sequential control circuit means and the microcomputing circuit means mentioned above.
A still further object of the present invention is to provide a sequential control circuit means of the above-described type, which is constituted through a combination of a plurality of conventional circuit components
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