The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 1998
Filed:
Feb. 01, 1996
Applicant:
Inventor:
Manabu Kato, Seto, JP;
Assignee:
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
347 70 ; 347 68 ;
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.