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METHODS AND APPARATUS FOR DETERMINING TONER LEVEL IN ELECTRO-PHOTOGRAPHIC PRINT ENGINES

  • US 20080068653A1
  • Filed: 11/23/2007
  • Published: 03/20/2008
  • Est. Priority Date: 08/07/1995
  • Status: Active Grant
First Claim
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1. A method for printing a print job on a printer having a toner cartridge having an initial amount of toner, the print job comprising a predetermined number of image pixels, each image pixel comprising a value between completely OFF to completely ON, the method comprising:

  • determining a maximum amount of toner required to print the print job on the printer;

    summing the pixel values to generate an accumulated pixel value;

    dividing the accumulated pixel value by the predetermined number of image pixels to generate an average pixel value;

    calculating an amount of toner required to print the print job by multiplying the average pixel value by the determined maximum toner amount; and

    printing the print job only if a difference between the calculated toner amount and the initial toner amount exceeds a minimum toner level.

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