Liquid jetting head

A liquid jetting head comprising

• a nozzle plate having a plurality of nozzles,
• a flowing-path plate layered on the nozzle plate, the flowing-path plate having a plurality of nozzle-communicating chambers and a plurality of pressure-chambers, the plurality of nozzle-communicating chambers respectively communicating with the plurality of nozzles, the plurality of pressure-chambers respectively communicating with the plurality of nozzle-communicating chambers, the plurality of pressure-chambers being open to a side away from the nozzle plate,
• a vibrating plate commonly sealing the open surfaces of the plurality of pressure-chambers of the flowing-path plate,
• a plurality of pressure-generating units that respectively changes pressures of liquid in the respective pressure-chambers, wherein
• the plurality of nozzles are aligned on a line segment,
• the vibrating plate has a plurality of supplying ports that respectively communicate with the plurality of pressure-chambers, and
• at least one of the supplying ports communicating with at least one of the nozzles in the vicinity of an end of the line segment is formed so as to have a larger diameter than at least one of the supplying ports communicating with at least one of the nozzles away from the end of the line segment.

A liquid jetting head comprising

• a nozzle plate having a plurality of nozzles,
• a flowing-path plate layered on the nozzle plate, the flowing-path plate having a plurality of nozzle-communicating chambers and a plurality of pressure-chambers, the plurality of nozzle-communicating chambers respectively communicating with the plurality of nozzles, the plurality of pressure-chambers respectively communicating with the plurality of nozzle-communicating chambers, the plurality of pressure-chambers being open to a side away from the nozzle plate,
• a vibrating plate commonly sealing the open surfaces of the plurality of pressure-chambers of the flowing-path plate,
• a plurality of pressure-generating units that respectively changes pressures of liquid in the respective pressure-chambers, wherein
• the plurality of nozzles are aligned on a line segment,
• the vibrating plate has a plurality of thin-parts, each of which is formed in at least a portion in an area corresponding to each of the open surfaces of the plurality of pressure-chambers, and
• at least one of the thin-parts corresponding to at least one of the pressure-chambers communicating with at least one of the nozzles in the vicinity of an end of the line segment is formed so as to have a smaller area than at least one of the thin-parts corresponding to at least one of the pressure-chambers communicating with at least one of the nozzles away from the end of the line segment.

A liquid jetting apparatus comprising;

• a liqluid jetting head including:
• a nozzle plate having a plurality of nozzles;
• a flowing-path plate layered on the nozzle plate, the flowing-path plate having a plurality of nozzle-communicating chambers and a plurality of elongated pressure-chambers, the plurality of nozzle-communicating chambers respectively communicating with the plurality of nozzles, the plurality of pressure-chambers respectively communicating with the plurality of nozzle-communicating chambers, the plurality of pressure-chambers being open to a side away from the nozzle plate;
• a vibrating plate commonly sealing the open surfaces of the plurality of pressure-chambers of the flowing-path plate;
• a plurality of pressure-generating units that respectively changes pressures of liquid in the respective pressure-chambers;
• wherein the plurality of nozzles are aligned on a line segment;
• and at least one of the pressure-chambers communicating with at least one of the nozzles in the vicinity of an end of the line segment is formed so as to have a shorter length than at least one of the pressure-chambers communicating with at least one of the nozzles away from the end of the line segment, and
• a controller that respectively controls the plurality of pressure-generating units.

A liquid jetting apparatus comprising;

• a liqluid jetting head including:
• a nozzle plate having a plurality of nozzles;
• a flowing-path plate layered on the nozzle plate, the flowing-path plate having a plurality of nozzle-communicating chambers and a plurality of pressure-chambers, the plurality of nozzle-communicating chambers respectively communicating with the plurality of nozzles, the plurality of pressure-chambers respectively communicating with the plurality of nozzle-communicating chambers, the plurality of pressure-chambers being open to a side away from the nozzle plate;
• a vibrating plate commonly sealing the open surfaces of the plurality of pressure-chambers of the flowing-path plate;
• a plurality of pressure-generating units that respectively changes pressures of liquid in the respective pressure-chambers;
• wherein the plurality of nozzles are aligned on a line segment;
• the vibrating plate has a plurality of supplying ports that respectively communicate with the plurality of pressure-chambers;
• and at least one of the supplying ports communicating with at least one of the nozzles in the vicinity of an end of the line segment is formed so as to have a larger diameter than at least one of the supplying ports communicating with at least one of the nozzles away from the end of the line segment;
• and
• a controller that respectively controls the plurality of pressure-generating units.

A liquid jetting apparatus comprising;

• a liquid jetting head including:
• a nozzle plate having a plurality of nozzles;
• a flowing-path plate layered on the nozzle plate, the flowing-path plate having a plurality of nozzle-communicating chambers and a plurality of pressure-chambers, the plurality of nozzle-communicating chambers respectively communicating with the plurality of nozzles, the plurality of pressure-chambers respectively communicating with the plurality of nozzle-communicating chambers, the plurality of pressure-chambers being open to a side away from the nozzle plate;
• a vibrating plate commonly sealing the open surfaces of the plurality of pressure-chambers of the flowing-path plate;
• a plurality of pressure-generating units that respectively changes pressures of liquid in the respective pressure-chambers;
• wherein the plurality of nozzles are aligned on a line segment;
• the vibrating plate has a plurality of thin-parts, each of which is formed in at least a portion in an area corresponding to each of the open surfaces of the plurality of pressure-chambers;
• and at least one of the thin-parts corresponding to at least one of the pressure-chambers communicating with at least one of the nozzles in the vicinity of an end of the line segment is formed so as to have a smaller area than at least one of the thin-parts corresponding to at least one of the pressure-chambers communicating with at least one of the nozzles away from the end of the line segment;
• and
• a controller that respectively controls the plurality of pressure-generating units.