US 6,305,792 B1Granted

Ink jet recording head

AssigneeNEC Corporation

InventorsYasuhiro Otsuka, Torahiko Kanda, Masakazu Okuda, Fuminori Takizawa

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Abstract

In order to reduce a manufacturing cost of an ink jet type recording head by simplifying a structure of the ink jet type recording head and reducing the number of manufacturing steps thereof, to provide a capacity of an ink pool without increasing a size thereof, to make the freedom of nozzle layout high and to make the freedom of design by reducing a restriction on position and number of ink supply ports, the ink pool to which ink is supplied is formed in a rear surface of a nozzle plate having a front surface formed with a plurality of nozzles and an ink chamber plate is attached to the rear surface of the nozzle plate through discrete partition walls each defining a discrete space communicating with different one of the nozzles.

Claims15

Dependent claims

An ink jet recording head comprising:

a nozzle plate having a front surface formed with a plurality (n) of nozzles;
an ink chamber plate arranged substantially in parallel to a rear surface of said nozzle plate;
an outer partition wall arranged between said nozzle plate and said ink chamber plate to define an ink pool between said nozzle plate and said ink chamber plate;
a plurality of discrete partition walls arranged between said nozzle plate and said ink chamber plate and within said outer partition wall, each discrete partition wall associated with one of said nozzles and defining a discrete space communicating with the one of said nozzles;
an ink supply port formed in each of said discrete partition walls to supply ink from said ink pool to said discrete space defined thereby, said discrete partition walls separated from each other by said ink pool;
and
pressure generation means for separately pressurizing ink supplied from said ink pool through said ink supply ports to said discrete spaces.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/292,327Filed 15 Apr 1999
Priority: JP 10-10797117 Apr 1998
Granted: 23 Oct 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B41J 2/1404
Structure of the pressure chamber: geometrical characteristics
B41J 2/14274
Structure of print heads with piezoelectric elements: of stacked structure type, deformed by compression/extension and disposed on a diaphragm
B41J 2002/14387
Structure thereof only for on-demand ink jet heads: front shooter
B41J 2002/14459
Structure thereof only for on-demand ink jet heads: matrix arrangement of the pressure chambers