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Printhead ink supply system

  • US 6,293,658 B1
  • Filed: 07/10/1998
  • Issued: 09/25/2001
  • Est. Priority Date: 07/15/1997
  • Status: Expired due to Term
First Claim
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1. A printhead ink supply unit for supplying ink to a pagewidth printhead from which the ink is to be ejected, the printhead defining a plurality of inlet apertures for supplying ink to a series of ejection nozzles, the printhead ink supply unit including the printhead and further comprising:

  • a plurality of columnar chambers, each chamber being configured to store a supply of ink of a particular color, the chambers having a length which is the same as that of the printhead and being positioned adjacent a back surface of the printhead; and

    a series of tapered guide walls separating the chambers from one another, each tapered guide wall tapering into an end portion that mates with the back surface of the printhead, each end portion being in communication with at least one of the inlet apertures of the printhead for channelling ink of a particular color to channels of the printhead.

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