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:
Apr. 18, 2000
Filed:
Sep. 04, 1997
Applicant:
Inventor:
Hitoshi Yoshida, Kounan, JP;
Assignee:
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
347 70 ;
Abstract
The value C defined between the width W1 of the ink chamber 2 and the width W2 of the piezoelectric element portion 7 disposed on the vibrating sheet 5, which is obtained based on an equation; C=(W1-W2)/(2.times.W2), is set in a range of 0.5 to 0.8. This value C=(W1-W2)/(2.times.W2) is an index value of an allowable range of displacement amount of the piezoelectric element portion 7, in which the ink ejecting speed is not influenced by the displacement when the piezoelectric element portion 7 is arranged on the vibrating sheet 5 with the displacement from a center of an upper plane of the ink chamber 2.