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Method and apparatus for detecting the working state of a printing press or the like

  • US 4,310,844 A
  • Filed: 04/10/1980
  • Issued: 01/12/1982
  • Est. Priority Date: 04/14/1979
  • Status: Expired due to Term
First Claim
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1. A method of detecting the working state of a machine whose production time includes both operation time and downtime, the downtime being due to a plurality of possible causes, which method comprises:

  • placing on a recorder table a record medium in the form of a flat sheet having a set of blanks to be filled in to record the working state of the machine as well as an elongated signal recording blank;

    providing a recording head having a recording member;

    moving the recording head relative to the signal recording blank along the length thereof;

    deriving from the machine, during the progress of its production time, successive electrical signals indicative of the operation and at least approximate downtime causes of the machine; and

    sending the successive signals to the recording head to move the recording member, as it is moved along the length of the recording blank, transversely to the length of the recording blank with different time intervals to record the signals in the recording blank along the length thereof with visually different shapes and dimensions, respectively, the recorded signals comprising essentially segments of line spaced apart differently lengthwise of the recording blank depending upon different signals;

    whereby the operation time, downtime, and at least approximate downtime causes of the machine can be visually ascertained from the recording in the recording blank of the sheet and the recording can be readily transcribed in the set of blanks.

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