Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1996-02-13
1997-09-23
Metjahic, Safet
Incremental printing of symbolic information
Ink jet
Ejector mechanism
347 71, B41J 2045
Patent
active
056709994
ABSTRACT:
An ink jet print head is disclosed which includes a metallic nozzle member having a plurality of nozzles through which fine particles of ink are jetted, and a ceramic ink pump member superposed on and bonded to the nozzle member. The ink pump member has a plurality of ink chambers formed behind the respective nozzles, and a plurality of piezoelectric/electrostrictive elements each disposed on a portion of the ink pump member opposite a respective ink chamber, for deforming the portion so as to change a pressure of the respective ink chamber, whereby the ink supplied to the ink chamber is jetted through the corresponding nozzle. The ink jet print head further includes a CTE (coefficient of thermal expansion) adjusting member superposed on and bonded to the nozzle member and/or the ink pump member, for reducing a stress which is applied to the ink pump member due to a difference between a coefficient of thermal expansion of the nozzle member and that of the ink pump member.
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Patent Abstracts of Japan, vol. 15, No. 101 (M-1091) Mar. 11, 1991 & JP-A-03 000255 (Seiko Epson Corp.) Jan. 7, 1991.
Patent Abstracts of Japan, vol. 15, No. 447 (M-1179) Nov. 14, 1991 & JP-A-03 190742 (Seiko Epson Corp.).
Thin Solid Films, vol. 201, No. 2,, Jun. 30, 1991 Lausanne, CH, pp. 253-265, XP 000231086, Jou et al. "An Analysis of Thermal Stresses in a Multilayer Thin Film Printhead".
Okada Shigeki
Takahashi Nobuo
Takeuchi Yukihisa
Dalakis Michael
Metjahic Safet
NGK Insulators Ltd.
Seiko Epson Corporation
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