Ink jet print head having members with different coefficients of

Details Ink jet print head having members with different coefficients of Ink jet print head having members with different coefficients of

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.

REFERENCES:
patent: 3441754 (1969-04-01), Heny
patent: 3747120 (1973-07-01), Stemme
patent: 3946398 (1976-03-01), Kyser et al.
patent: 4680595 (1987-07-01), Cruz-Uribe et al.
patent: 5113204 (1992-05-01), Miyazawa et al.
patent: 5126618 (1992-06-01), Takahashi et al.
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".

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