Ink jet recording head

An ink jet recording head comprising:

• thin plate members;
• an ink supply section;
• a nozzle plate having nozzle openings;
• and
• pressure producing chambers for respective nozzle openings;
• each of said thin plate members having a plurality of holes therein defined by respective walls, said thin plate members being laminated together, wherein said walls of said holes formed in adjacent ones of said thin plate members are shifted by a predetermined distance, in a direction that is transverse to a direction extending from the pressure producing chambers to said nozzle plate, from each other and cooperate to form a plurality of ink flow paths continuously extending from each of said nozzle openings to said respective pressure producing chamber which communicates with said ink supply section, wherein said walls are shifted so that center points of each adjacent pair of holes in one flow path lie on a straight line segment extending entirely within that flow path, and such that each of the walls in said thin plate member closest to the nozzle plate is at a maximum shifted distance away from said respective pressure producing chamber.

An ink jet recording head comprising:

• thin plate members;
• an ink supply section;
• nozzle openings;
• and
• pressure producing chambers for respective nozzle openings;
• each of said thin plate members having a plurality of holes therein defined by respective walls, said thin plate members being laminated together, wherein said walls of said holes formed in adjacent ones of said thin plate members are shifted with respect to each other so that said walls formed in said adjacent ones of said thin plate members overlap and are not aligned, wherein said holes in said adjacent ones of said thin plate members cooperate to form a plurality of ink flow paths continuously extending from each of said nozzle openings to said respective pressure producing chamber which communicates with said ink supply section,
• wherein in at least one of said ink flow paths, an area of the hole adjacent to the pressure producing chamber is larger than an area of any other hole in said at least one ink flow path.

An ink jet recording head comprising:

• thin plate members;
• an ink supply section;
• a nozzle plate having nozzle openings;
• and
• pressure producing chambers for respective nozzle openings;
• each of said thin plate members having a plurality of holes therein defined by respective walls, said thin plate members being laminated together, wherein said walls of said holes formed in adjacent ones of said thin plate members are shifted, in a direction that is transverse to a direction extending from the pressure producing chambers to said nozzle plate, in a step arrangement with respect to each other such that each of the walls in said thin plate member closest to the nozzle opening is at a maximum shifted distance away from said respective pressure producing chamber, wherein said holes in said adjacent ones of said thin plate members cooperate to form a plurality of ink flow paths continuously extending from each of said nozzle openings to said respective pressure producing chamber which communicates with said ink supply section.