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Inkjet printhead with shared ink spread restriction walls

  • US 7,874,644 B2
  • Filed: 04/13/2009
  • Issued: 01/25/2011
  • Est. Priority Date: 10/16/1998
  • Status: Expired due to Fees
First Claim
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1. A printhead for an inkjet printer, the printhead comprising:

  • a wafer assembly defining a plurality of ink supply channels; and

    plural groups of ink ejection nozzle arrangements extending from the wafer assembly, each group of ink ejection nozzle arrangements sharing a common ink supply channel, whereineach group of ink ejection nozzle arrangements includes a plurality of ink ejection nozzle arrangements arranged in a pair of rows,each group of ink ejection nozzles includes one ink spread restriction wall shared by the group, the ink spread restriction wall being interposed between each ink ejection nozzle of the group and so as to at least partially surround each ink ejection nozzle of the group, andthe shared ink spread restriction wall is spaced apart from each ink ejection nozzle arrangement to define a plurality of ink spread restriction pits between the common ink spread restriction wall and respective ink ejection nozzle arrangements.

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