Ink jet printer head having less thermally extendable diaphragm

Details Ink jet printer head having less thermally extendable diaphragm Ink jet printer head having less thermally extendable diaphragm

1996-02-01

1998-08-11

Hecker, Stuart N.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 68, B41J 2045

Patent

active

057933944

ABSTRACT:
In an ink jet printer head using a hot-melt ink, a diaphragm disposed between a piezoelectric element and a cavity plate is made from such a resin that has more than 400 kg/mm.sup.2 modulus of elasticity, less than 20.times.10.sup.-6 cm/cm.multidot..degree. C. rate of thermal expansion, and more than 20 kg/mm.sup.2 tensile strength. With the use of such a resin material in the diaphragm, the diaphragm stretched over the cavity plate will not be loosened even if there is a temperature change in the diaphragm, whereby ink ejection which is highly responsive to the displacement of the piezoelectric element can be attained.

REFERENCES:
patent: 4312007 (1982-01-01), Winfield
patent: 4998120 (1991-03-01), Koto et al.
patent: 5510819 (1996-04-01), Fujimoto et al.
patent: 5612725 (1997-03-01), Okimoto
patent: 5639508 (1997-06-01), Okawa et al.

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