Ink jet recording head structure, ink jet printer, powder molding method, method of manufacturing recording head structure supporting member, and powder molding press apparatus

  • US 7,097,286 B2
  • Filed: 11/12/2003
  • Issued: 08/29/2006
  • Est. Priority Date: 11/12/2003
  • Status: Active Grant
First Claim
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1. An ink jet recording head structure comprising:

  • an ink jet recording head comprising a flow passage member provided with a plurality of ink chambers and pressurizing mechanisms for pressurizing ink in respective ink chambers, and a nozzle plate having ink discharge holes communicating with said ink chambers; and

    a support member comprising ceramics that has ink delivery holes communicating with the ink chambers of said flow passage member and supports said ink jet recording head,wherein said ink delivery hole has an elongated hole having an inclined bottom surface that opens on the ink jet recording head side and deepens toward the center, and a small-diameter hole that communicates with said elongated hole, andsurface roughness of at least the inclined bottom surface of said ink delivery hole is from 0.4 to 1.0 μ

    m in terms of arithmetic mean roughness (Ra) and void ratio is in a range from 5 to 30%.

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