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. 17, 2001
Filed:
Jun. 11, 1998
Toshio Inose, Nagoya, JP;
Masaaki Deguchi, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
An ink jet printer head for discharging ink is provided with: a cavity plate prescribing (i) an ink flow path through which the ink is supplied, (ii) a plurality of ink storing chambers, each of which is connected to the ink flow path in which the supplied ink is temporarily stored, and (iii) a plurality of ink discharge holes which are connected to respective one of the ink storing chambers though which the temporarily stored ink is discharged; a piezoelectric element member, which is shaped in a plate opposed to the cavity plate and has a plurality of piezoelectric elements for selectively changing capacities of the ink storing chambers; and a partition plate interposed between the cavity plate and the piezoelectric element member such that each of the ink storing chambers be a closed space for temporarily storing the ink. The cavity plate is provided with a main plate portion and a plurality of partition wall portions, which stand from the main plate portion and are arranged at substantially equidistant intervals, for partitioning the ink storing chambers adjacent to each other. Each of the partition wall portions includes (i) a straight wall portion, which is disposed at a tip side thereof and is constant in width from the tip side toward a root side thereof to prescribe a straight wall substantially perpendicular to the main plate portion, and (ii) an inclined wall portion, which is disposed at the root side, increases in width from the tip side toward the root side to prescribe an inclined wall oblique to the main plate portion.