Ink jet printer head
AssigneeSeiko Epson Corporation
InventorsTsuyoshi Kitahara, Shuji Yonekubo, Hideki Morozumi, Koichi Higashimura, Masanao Matsuzawa
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Abstract
An ink jet print head is provided having a nozzle forming substrate with a plurality of nozzles formed therein. Vibrators formed on a piezoelectric transducer disposed within the ink jet print head opposite the nozzles are independently drivable. A first gap is formed between the nozzle forming substrate and a vibrator in a region adjacent the nozzles. A second gap is formed between the nozzle forming substrate and a vibrator at a region away from the nozzles having a different dimension than the first gap.
Claims14
An ink jet print head for ejecting ink onto a recording medium comprising a frame, an ink supply, a nozzle forming substrate supported on the frame and having a plurality of nozzles formed therein, a piezoelectric transducer having a plurality of vibrators thereon, each vibrator being in direct contact with the ink and independently driven, the piezoelectric transducer being supported on the frame so that a vibrator is in facing relationship with the nozzle forming substrate forming a first gap between the vibrator and a region of the nozzle forming substrate adjacent to the nozzle and a second gap formed between the vibrator and a region of the nozzle forming substrate away from the nozzle, the width of the first gap being different from the width of the second gap, the first gap having a width for controlling the pressure generated therein, the second gap having a width for controlling the vibration of each vibrator and ink supply, and the width of the first gap being less than the width of the second gap when the viscosity of the ink is greater than 5 mPaS and the width of the first gap being greater than the width of the second gap when the viscosity of the ink is no greater than 5 mPaS.
An ink jet print head for ejecting ink onto a recording medium comprising a frame, a nozzle forming substrate supported on the frame and having a plurality of nozzles formed therein, the nozzle forming substrate including a bed, the nozzles being formed within the bed, a piezoelectric transducer having a plurality of vibrators thereon, each vibrator being formed with a circular projection on a region of the vibrator disposed opposite the nozzle, each vibrator being independently driven, the piezoelectric transducer being supported on the frame so that a vibrator is in facing relationship with the nozzle forming substrate forming a first gap between the vibrator and a region of the nozzle forming substrate adjacent to the nozzle and a second gap formed between the vibrator and a region of the nozzle forming substrate away from the nozzle, the width of the first gap being different from the width of the second gap, and said circular projection being formed with at least two grooves therein.
An ink jet print head for ejecting ink onto a recording medium comprising a frame, a nozzle forming substrate supported on the frame and having a plurality of nozzles formed therein, the nozzle forming substrate including a bed, the nozzles being formed within the bed and a piezoelectric transducer having a plurality of vibrators thereon, each vibrator being independently driven, the piezoelectric transducer being supported on the frame so that a vibrator is in facing relationship with the nozzle forming substrate forming a first gap between the vibrator and a region of the nozzle forming substrate adjacent to the nozzle and a second gap formed between the vibrator and a region of the nozzle forming substrate away from the nozzle, the width of the first gap being different from the width of the second gap, and said circular projection being formed with two opposed grooves formed therein, said grooves extending radially from the center of said projection.
Dependencies are inferred from the claim text.