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Windows driver for sensing ink cartridge prior to generation of data

  • US 6,273,541 B1
  • Filed: 04/22/1998
  • Issued: 08/14/2001
  • Est. Priority Date: 04/22/1997
  • Status: Expired due to Fees
First Claim
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1. A printing method for printing images on a printer connected to a host computer, said method comprising the steps of:

  • when a first ink cartridge of a printer is replaced by a second ink cartridge, transmitting a first signal to said printer from a host computer, and receiving a second signal from said printer to said host computer, said second signal including first data describing a pigment of ink contained in said second ink cartridge;

    when said second signal is received by said host computer, identifying said pigment of said ink contained in said second ink cartridge;

    when said pigment of said ink contained in said second ink cartridge corresponds to black ink, generating first print data corresponding to the black ink;

    when said pigment of said ink contained in said second ink cartridge corresponds to different color inks, generating second print data corresponding to the different color inks, wherein a button mounted on said printer is pressed when said first ink cartridge of said printer is replaced by said second ink cartridge;

    conveying said ink from said second ink cartridge onto a recordable medium to form a first image corresponding to said first print data when said first print data is generated;

    conveying said ink onto the recordable medium to form a second image corresponding to said second print data when said second print data is generated, said conveying being performed when a head driver generates an electrical signal to said second ink cartridge;

    receiving a reference voltage at said head driver, said head driver comprising first and second operational amplifiers, said first operational amplifier having an inverting input terminal receiving the reference voltage and a noninverting input terminal receiving a power signal and an output terminal;

    receiving the reference voltage at said second operational amplifier, said second operational amplifier having an inverting input terminal receiving the reference voltage and a noninverting input terminal receiving the power signal and an output terminal;

    when said first print data is generated, receiving a first voltage at said output terminal of said first operational amplifier and outputting a black ink enable signal driving said second ink cartridge; and

    when said second print data is generated, receiving a second voltage at said output terminal of said second operational amplifier and outputting a color ink enable signal driving said second ink cartridge.

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