Liquid droplet jetting head and method of manufacturing liquid droplet jetting head
AssigneeBrother Kogyo Kabushiki Kaisha
InventorYoshikazu Takahashi
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Abstract
A piezoelectric actuator, a cavity plate, a base plate, and a supply plate are common in normal specifications, black high-speed focused specifications, and color-image focused specifications, but other plates such as a manifold plate, a damper plate, a spacer plate, and a nozzle plate are produced according to these specifications. A center of a communicating hole which connects a pressure chamber and a nozzle is gradually shifted in a paper feeding direction, and a position at which the nozzle is formed is also shifted in the paper feeding direction. Accordingly, it is possible to decrease the number of manufacturing lines and to reduce the manufacturing cost as compared to those in a conventional method of manufacturing a liquid droplet jetting head.
Claims14
A liquid droplet jetting head which jets a droplet of a liquid, comprising:
- a cavity unit including:
- a plurality of nozzles arranged in a predetermined surface;
- a plurality of pressure chambers which accommodate the liquid;
- and
- a plurality of liquid channels which connect the nozzles and the pressure chambers respectively, and which have portions extending in a vertical direction to the predetermined surface and other portions extending in a direction different from the vertical direction such that the center portion of a liquid channel nearest a pressure chamber does not coincide with the center portion of a liquid channel nearest the nozzle;
- and
- an actuator which is arranged on the cavity unit and which selectively applies a jetting pressure to the liquid in the pressure chambers.
A method for manufacturing liquid droplet jetting heads which have a plurality of specifications, and each of which includes a cavity unit having a plurality of nozzles which jet a droplet of a liquid, a plurality of pressure chambers which accommodate the liquid, and a plurality of liquid channels which connect the nozzles and the pressure chambers respectively, and an actuator which selectively applies a jetting pressure to the liquid in the pressure chambers, the method comprising steps of:
- a plates-providing step for providing a nozzle-plate group which includes:
- a plurality of nozzle plates in which the nozzles are formed in different patterns;
- an intermediate-plate group which includes a plurality of intermediate plates in which the liquid channels are formed in a different pattern respectively;
- and
- a cavity plate in which the pressure chambers are formed;
- a selecting step for selecting a nozzle plate among the nozzle-plate group which corresponds to a predetermined specification among the specifications and an intermediate plate among the intermediate-plate group which corresponds to the predetermined specification;
- and
- a stacking step for stacking the nozzle plate and the intermediate plate selected in the selecting step, and the cavity plate,
- wherein the plurality of liquid channels which connect the nozzles and the pressure chambers respectively have portions extending in a vertical direction to the predetermined surface and other portions extending in a direction different from the vertical direction such that the center portion of a liquid channel nearest a pressure chamber does not coincide with the center portion of a liquid channel nearest the nozzle.
Dependencies are inferred from the claim text.